Volume 2 - HP64000.net

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Volume 2 - HP64000.net
The PC Engineer's
Reference Book
Volume 2:
Motherboards
Introduction
This book primarily contains motherboard jumper settings, but other information, such as known bugs
and performance issues have been included when available. Not all comments have been verified, as they
have been obtained from various places, including service departments and magazine reviews, but are
believed to be reliable. To save space and costs, no diagrams have been used, as a good engineer shouldn’t
need them if the motherboard has been marked up properly. In other words, this is meant to be a quick
reference for those familiar with computers. Parallel, serial and floppy connectors, etc. have also been
excluded, except when they depart from the standard (described at the back), and where a setting
indicates an on condition, the opposite has been left out, as it should be obvious. Jumpers or switches not
mentioned are usually factory set and should be left alone.
The book is organised alphabetically, by manufacturer. To identify your motherboard from the screen,
refer to Volume 1, The BIOS Companion for the manufacturer ID, then, if your BIOS is an Award, the
individual code for your board under the appropriate manufacturer.
Legal Bit
This book and any included software is sold as is without warranty of any kind, either express or implied,
including but not limited to the implied warranties of merchantability and fitness for a particular
purpose. Neither the Author, the Publisher nor its dealers or distributors assumes any liability for any
alleged or actual damages arising from their use.
Translation: Although this information has been gathered from original manufacturer's details or
practical experience, it is always changing, or scarce, so there could be technical inaccuracies or
typographical errors. As a result, changes will be made to the information in this book and included
software without reference to anyone, and we don't guarantee that the product suits your purposes.
In addition, no liability can be accepted for loss of data or business or damage to equipment as a result of
using the information contained herein—backups are your responsibility.
Copyrights, etc
Windows, Windows `95, Windows NT, DOS and Xenix are trademarks and Microsoft is a registered
trademark of Microsoft Corporation. Novell and NetWare are registered trademarks of Novell, Inc.
Macintosh is a registered trademark of Apple Computer, Inc. VAX is a trademark of Digital Equipment
Corporation. 8086, 80286, i386, i486, i486DX, i486DX2, i486DX4, i486SX, and i487SX, Intel OverDrive
Processor are trademarks of Intel Corp. UNIX is a registered trademark of UNIX System Laboratories.
IBM, PC, XT, AT and OS/2 are trademarks of International Business Machines Corp. PCI is a registered
trademark of PCI Special Interest Group. Triton is a trademark of a company in Germany. Any code
listings, although obtained from sites that are publicly accessed, may be copyrighted by their respective
manufacturers. All other proprietary trade names, trademarks and names protected by copyright are fully
acknowledged. All are mentioned for editorial purposes only, with no intention of infringing them.
This book copyright © January 2002 Phil Croucher. ISBN 0-9681928-6-6
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise,
without prior written permission from the author.
Electrocution Technical Publishers
www.electrocution.com
Table of Contents
A
11
AAEON Technology Inc
11
Ability Electron Co Ltd
Abit
11
11
Acer (Aopen)
Achitec Corp
17
49
Achme Computer
49
Acme
ACORP International
49
49
Acouire, Inc
Acro Computer Corp
50
50
Acrosser Technology Co
50
Activei Systems Inc
Acusharp
50
50
Adcom
ADI
50
50
Adlink Technology Ltd
50
Advanced Integration Research (AIR)
Advanced Jenn Bao Enterprises
50
50
Advanced Logic Research
Advanced Micro Products (AMP)
51
51
Advantech
51
AEG Olympia
51
ii
The PC Engineer’s Reference Book – Vol 2
AIR
Alaris
54
73
Alcom Group
ALi
73
73
ALR
74
Alton
Amaquest
76
76
American Megatrends
American Predator
76
76
American Sunshine Technologies
76
AMI
Amjet
76
79
AMP
Amptron
79
79
Amtec
80
Anigma
Anscera
80
80
Anson
Antec
80
80
AOpen
81
Appro
Apricot
96
96
Aprocom
Arche
97
98
Arima
102
Aristo
Arstoria
102
103
Arvida
ASI
103
103
ASK Technology
103
Aspen Systems
AST
103
103
ASUS
Astar
131
144
AT&T
144
ATC
ATI
145
145
Atima Technology
ATL
145
145
A-Trend
145
Attractive Computer Technology
Auhau Electronics (Sukjung)
147
147
AVT Industrial
Azza
147
147
B
149
BCM
149
Table Of Contents
BCOM
Bek-Tronic
149
149
Bestkey
149
Biostar
Bioteq
150
151
BJMT Technology
Bluepoint Technology
151
152
BMA
152
Brother
Bull
152
154
Caliber Computer Corp
159
159
California Graphics & Peripherals
159
ChainTech
Chaplet
159
163
Chicony
Clevo
163
164
C
Commate
164
Compaq
Compower
164
189
Computer Technology System
Computrend
189
189
Concord OA
189
Core International
Crusader
189
190
CyberMax
Cycle Computer Corp
190
190
D
E
iii
191
Daewoo
Darter
191
192
DataExpert
Datatech
192
192
Dell
192
DFI
Diamond Flower International
195
197
Diamond Micronics
Digicom
197
197
Digimate
197
Digital
Domex
197
197
DTC
DTK
197
197
199
iv
The PC Engineer’s Reference Book – Vol 2
Eagle
ECS
199
199
Edom International
EFA
225
225
EFAR
225
Elite Group
Elonex
225
225
Elpina
ENPC
235
235
EPoX
236
Epson UK
Eupacomputer
237
245
Eurone LA
Everex
246
246
Expert
250
Famous Technology
253
253
Fentech
Ferranti
253
253
F
FIC
253
Fine-Pal Company
Firenze
255
255
First International Computer
256
Fittec
FKI
256
256
Flagpoint
Flamingo
256
256
Flexus
256
Flytech
Fong Kai Industrial
256
256
Fordlian
Formosa
257
257
Freetech
257
Freeway
Fugutech
258
258
Full Yes International
FYI
259
259
G
261
Gateway
Gemlight
261
261
Genoa
G-host
261
262
Giantec
262
Gigabyte
Global Circuit Technologies
262
268
Table Of Contents
Global Impact
Global Legate
H
v
268
268
269
Hewlett Packard
Holco
269
270
HSB
Hsing Tech
270
271
Hyundai
271
IBM
277
277
ICP
Impression Products
285
285
I
Informtech
285
Intel
Inventa
285
298
Inventec
Itri
298
298
Iwill
298
Jamicon
299
299
Jaton Corp
JBond
299
299
JDR Microdevices (HK)
300
Jetta
Jetway
300
300
J-Mark
JossTech
302
302
J
K
303
Kaimei
Kam-Tronic
303
303
Kapok
Kinpo
303
303
Koutech Systems
303
LAN Plus
305
305
Lanix
Lanner
305
305
Leading Edge
305
Lexar
Lucky Star
305
306
Lucky Tiger
306
L
vi
The PC Engineer’s Reference Book – Vol 2
M
Macrotech
307
307
Matra
Matsonic
307
307
Megastar
307
Mega System Co
Megatrends Technology
307
307
Memorex Telex
Mentor
307
312
Mercury Computer Corp
312
Microfive
Microgram
312
312
Micronics
Micom
312
321
MicroStar International (MSI)
321
MINT data
Mirage
323
324
MiTAC
Mitsuba
324
324
Mitsubishi
324
MLE
Motorola
324
324
MSI
324
M-Technology
MTI
324
330
Mustek
Mycomp
330
330
Mylex
331
Mynix
334
N
335
NEC
NewStar Engineering
335
341
Newtech International
341
Nexcom
Niagara SMD
341
341
NMC Peripherals Europe
Novell
342
342
NTC Technologies
343
Ocean
345
345
Octek
Olivetti
345
345
O
Opti
352
Opus
353
Table Of Contents
P
vii
Packard Bell
357
357
Palit
375
Panrix
Palmax
375
376
Pantex
PC Chips
376
376
PC Master
382
PC Max
PC Partner
382
382
PC Quest
PC Ware
382
382
Pine Technology
382
Pionex Computers
Powertech
384
384
Premio
President Technology
384
384
Pride
384
Prime
Procomp
385
385
Pronix
Proside
385
385
Proteam
385
Protech
385
Q
387
QDI
QTC
387
392
Quanta
392
Quantex
392
R
393
Rectron
RedFox
393
393
Rise Computer Inc
393
Robotech
RSAptek
393
394
S&D
395
395
Samsung
395
Sam-Tec
San-Li
401
401
San Carlos Computers
SBC
401
401
Seanix
401
S
viii
The PC Engineer’s Reference Book – Vol 2
See-thru Data Systems
Shuttle
401
402
Silicon Star Intl
SMT
405
405
Soltek
405
Sowah Research
Soyo
406
407
Spacewalker
Spear Motherboard
415
415
Spica
415
Spring Circle
Sukjung
415
415
SuperMicro
SuperPower
416
421
Sye
424
Taemung/Fentech
425
425
Taiwan Mycomp Corp
Taken Corp
425
425
Tandon
425
Tatung
TC Computers
434
435
T
Tekram
435
TMC
Tomatoboards
436
442
Top Gun
Toshiba
442
442
Totem
445
Transcend
Trigem
445
446
Tulip
Twinhead
446
449
Tyan
449
UHC
453
453
Umax
UMC
453
453
U
Unicom
453
Unisys
Unitron
453
455
Unknown
USI
455
459
US Logic
459
Vanilla
461
461
V
Table Of Contents
Vextrec
Victor
ix
462
462
Vision Top
467
Vobis
VTech
468
468
VTI
468
W
469
Walters International
469
Warpspeed
Western Digital
471
471
Win
WinCo Electronic Co
477
477
Win-Lan
477
Wintec (Win Technologies)
Wyse
477
477
Yamashita
485
485
Yellow Dragon
485
Yukon
485
Y
Z
487
Zenith Data Systems
Zida Technologies
CONNECTORS
487
490
491
x
The PC Engineer’s Reference Book – Vol 2
A
AAEON Technology Inc
www.aaeon.com.tw
Ability Electron Co Ltd
Aka Elpina www.ability-tw.com
Abit
www.abit.com.tw www.abit-usa.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0
1C-40
2
2-02
2-15
2C-C5
2C-5E
2C-7A
2C-B8
2C-D2
9C(-9D)
AC
AC(-7T)
AC
BC-3P
Motherboard
P14T
PK5
PW4/PW4T
AH4-T (DX4)
PE5
PB4
PB4
PB4
PB4
PB4
PH5
BX6 (BX)/AX5
LX-6 (LX)
PR5 (VX)
AX5 or PX5
Code
BC-6A
CC
CC-D6
DC
EC-1G
EC-1S
EC-1Y
EC-2L
EC-2R
EC-3K
EC-9B
FC
FC-3Q
FC-3Y
Motherboard
PB4 (Ali 1487/89 chipset)
PS6/PN5
PH5
PT5/IT5H
IT5V v 1G
IT5V v 1S
SM5-A
SM5
SM5-A
IT5H v1.51
PH5
IT5H v2
SM5-A
12
The PC Engineer’s Reference Book – Vol 2: Motherboards
AX5
Item
CPU
Bus
Memory (Mb)
Performance
Comments
Description
Notes
Jumperless setup
4 ISA/4PCI
4 x 72pin
Bus Speeds (MHz) up to 83MHz
Cannot disable USB interrupt
AP5C
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Problems
Description
Pentium
Up to 133 MHz
Triton
AMI Flash
4 ISA/4PCI
128 Mb
512K
2S, 1P, Floppy, IDE
Notes
1 each shared
EDO/FPM
PB or asynchronous
IDE via chipset
ATI Mach64 may produce ghosted images at high resolutions and/or colour depths.
BE6
Jumperless
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium III/Celeron
233-550
440 BX
Award
5 PCI/2 ISA
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Slot 1
100 FSB
1 shared
3 DIMM sockets
2 EIDE, UDMA/66
AGP
Quite good
BE6-II
Jumperless
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium III/Celeron
233-550
440 BX
Award
5 PCI/1 ISA
768 Mb
Notes
Slot 1
100 FSB
3 DIMM sockets
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
2 EIDE, UDMA/66
AGP
Quite good
BP6
Jumperless
Item
Form Factor
CPU
Chipset
Description
ATX
Celeron
440 BX
Notes
2 x Socket 370
A
Item
BIOS
Bus
Memory (Mb)
I/O
Video
Description
Award
5 PCI/2 ISA
Notes
1 shared – up to 133 MHz
3 DIMM sockets
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
AGP
BX6
Jumperless
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium II/Celeron
233-550
440 BX
Award
4 PCI/3 ISA
1 Gb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Slot 1
1 shared – up to 133MHz
4 DIMM sockets
AGP
Quite good
KT7-RAID
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Description
ATX
Notes
Socket A
Via KT133
6 PCI/1 ISA
3 DIMM sockets
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel,
2 EIDE, floppy
Video
AGP
LX6
Item
Form Factor
CPU
Speeds (MHz)
Bus
Memory (Mb)
I/O
Description
ATX
Pentium II
500
4 PCI/3 ISA
512 Mb SDRAM
1 Gb EDO
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE,
floppy
Video
Performance
Notes
Slot 1
4 DIMM sockets
AGP
100 MHz bus speed, but only fair performance.
PB4
Item
Form Factor
CPU
Speeds (MHz)
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
AT
486DX/2/SX/SL/4
266
Award
3 PCI/4 ISA
Notes
P24D/T, also Cyrix/AMD
2 72-pin SIMM. EDO and asymmetrical DRAM
256K
2S, 1P, Floppy, 2IDE
13
14
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP1-2
JP3
Position
JP1
1-2
2-3
4-5
1-2
1-2
2-3
JP2
2-3
2-3
2-3
1-2
Function
CPU Voltage
3.45
3.6
4
5
128K cache (32Kx8 at U3,6,7,10)
256K cache (64Kx8 at U3,6,7,10)
JP5-9
RJ1-3
CPU
486DX/2/4
P24T
P24D
AMD 486DX2
AMD 486DX4 (NV8T)*
AMD 5x86-133/160
Enh AM486, 5x86-150
Cyrix DX4/DX2 (M7)**
Cyrix Cx5x86
Use 16Kx8 or 32Kx8 tag RAM at U4
RJ1
RJ2
RJ3
1-8
1-8
Off
7-14
1-8
Off
3-10
1-8
Off
1-8
1-8
Off
1-8
1-8
Off
3-10
1-8
Off
3-10
1-8
Off
1-8
Off
1-8
1-8
1-8
Off
JP8
JP4,1112
,19
Off*
System Speed
25 MHz
33 MHz
40 MHz
50 MHz
1-2*
Off*
1-2,5-6
2-3,4-5
1-2*
2-3
**If your Cyrix DX4-100 has DX4-P/O on it, use Cyrix Cx5x86
Reserved
JP4
JP11
JP12
JP19
Off
Off
1-2
Off
On
On
1-2
Off
On
Off
1-2
Off
Off
On
2-3
On
Reserved
Reserved
12v Flash ROM
5v EPROM
Normal operation
Discharge CMOS
JP12
JP14
JP15
JP17
PN5
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
JP4
JP5,6,20
JP26
DS1,2
Description
AT
Pentium, AMD 5x86, Cyrix 6x86
75-200
Intel 82430 HX
Award PnP
3 PCI/4 ISA
256K
2S, 1P, floppy, 2 EIDE, IR
Position
Off*
Off*
On
On
DS1
Off
Off
Off
On
DS2
On
Off
On
On
Notes
EDO
PB. COAST upgrade
Function
Enable Onboard I/O
256K cache
512K cache
Discharge CMOS
Clock multiplier
1 (DS1 on for Cyrix)
1.5
2
2.5
JP5
Off
Off
2-3
Off
Off
2-3
2-3
1-2
2-3
JP6
1-2
1-2
1-2
2-3
2-3
1-2
1-2
1-2
1-2
JP7
Off
Off
Off
Off
Off
On
Off
Off
Off
JP8
Off
Off
Off
On
Off
Off
Off
Off
Off
JP9
Off
Off
1-2
Off
Off
1-2
1-2
2-3
1-2
A
Jumper
DS3,4,7
DS5
DS6
CPU Voltage
2.5
2.7
2.8
2.9
3.38*
3.52
Position
On
On
DS3
On
Off
Off
On
On*
Off
On
Off*
Off
Off
DS4
On
Off
On
Off
DSV1
Off
Off
Off
Off
Off
On
DS7
Off
Off
Off
Off
DSV2
Off
Off
Off
Off
On
Off
Function
3 (DS1 off for Cyrix)
4 (Cyrix)
CPU external clock
50 MHz
55 MHz
60 MHz
66 MHz*
AT bus=CPU ext/8
AT bus=CPU ext/6
60 MHz DRAM refresh rate
66 MHz DRAM refresh rate
DSV3
Off
Off
Off
On
Off
Off
DSV4
Off
Off
On
Off
Off
Off
DSV5
Off
On
Off
Off
Off
Off
DSV6
On
Off
Off
Off
Off
Off
DSV7
On
On
On
On
On
Off
DSV8
Off
Off
Off
Off
Off
On
PW4(T)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
JP5
JP6
JP9
JP10
JP27-29
JP60-62
JPX3
Description
AT
80486, Cyrix M7, AMD
Notes
DX4
Award/AMI
3 ISA/3 VL
256
1024
1 ISA is 8-bit. 2 VL are Masters
4 30-pin sockets, 2 72-pin
256 standard
Position
On*
Off
Off*
On
Off*
On*
Off
System Speed
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
Function
Colour
Mono
Reserved
VL Bus 0 wait write
VL bus 1 wait write
>33 MHz System speed (VL bus)
<=33 MHz System speed (VL bus)
JP27
JP28
JP29
Off
Off
Off
Off
Off
On
On
On
On
Off
On
On
On
Off
Off
Cache size
128K (U2,4,6,8)
256K (64K in U2,4,6,8)
256K (16Kx8 tag, 64K in U2,4,6,8)
256K (32K in all sockets)
256K (16Kx8 tag, 32K all sockets))
512K (64K in all sockets)
LH figures for U30 clock generator. RH for U31.
JP60
JP61
JP62
JPX3
2-3
1-2
2-3
9-16
2-3
2-3
2-3
3-10
2-3
4-5
2-3
3-10
2-3
1-2
2-3
13-20
2-3
4-5
2-3
13-20
2-3
1-2
2-3
1-8
JP27
Off
On
Off
On
JP28
Off
Off
On
Off
JP29
On
On
On
Off
15
16
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
512K (128K in U2,4,6,8)
1 Mb (128K all sockets)
1-2
1-2
2-3
JP47-52
JP67
Function
2-3
1-2
2-3
3-10
1-2
1-2
1-2
1-8
SM (System Management Output) – for green power supply
Normal
Discharge CMOS
Intel Inside
RN8
JP37
JP38
JP39
JP40
JP20
JP26
JP42
JP65
RN5
RN6
RN7
JPX1
JPX2
JP15
JP18
JP21
JP33
JP34
JP35
JP16
JP17
SX
1-8
Off
Off
Off
Off
1-2
1-2
Off
Off
Off
1-8
Off
5-12
Off
Off
Off
Off
Off
Off
Off
2-3
2-3
SX(SL)
1-8
Off
Off
Off
Off
1-2
Off
1-2
Off
Off
1-8
Off
5-12
Off
Off
Off
Off
Off
Off
Off
2-3
2-3
DX/DX2
1-8
Off
Off
Off
Off
Off
1-2
Off
1-2
Off
1-8
1-8
5-12
Off
Off
Off
Off
Off
Off
Off
2-3
2-3
DX/2 (SL)
1-8
Off
Off
Off
Off
Off
Off
1-2
1-2
Off
1-8
1-8
5-12
Off
Off
Off
Off
Off
Off
Off
2-3
2-3
DX4-75(SL)
Off
On
Off
Off
Off
Off
Off
1-2
1-2
Off
1-8
1-8
5-12
Off
Off
Off
Off
Off
Off
Off
2-3
2-3
DX4-100(SL)
Off
Off
On
Off
Off
Off
Off
1-2
1-2
Off
1-8
1-8
5-12
Off
Off
Off
Off
Off
Off
Off
2-3
2-3
Cyrix Instead
RN8
JP37
JP38
JP39
JP40
JP20
JP26
JP42
JP65
RN5
RN6
RN7
JPX1
JPX2
JP15
JP18
JP21
JP33
JP34
JP35
JP16
JP17
DX(2)
1-8
Off
Off
Off
Off
Off
Off
1-2
1-2
1-8
Off
1-8
1-8
1-8
Off
Off
Off
Off
Off
Off
2-3
2-3
DX2-V50
Off
On
Off
Off
Off
Off
Off
1-2
1-2
1-8
Off
1-8
1-8
1-8
Off
Off
Off
Off
Off
Off
2-3
2-3
DX2-V66
Off
Off
Off
On
Off
Off
Off
1-2
1-2
1-8
Off
1-8
1-8
1-8
Off
Off
Off
Off
Off
Off
2-3
2-3
DX2-V80
Off
Off
Off
Off
On
Off
Off
1-2
1-2
1-8
Off
1-8
1-8
1-8
Off
Off
Off
Off
Off
Off
2-3
2-3
DX4-100
Off
Off
On
Off
Off
Off
Off
1-2
1-2
1-8
Off
1-8
1-8
1-8
Off
Off
Off
Off
Off
Off
2-3
2-3
Cx5x86
Off
Off
On
On
Off
Off
1-2
Off
1-2
Off
1-8
1-8
5-12
Off
1-2
1-2
Off
1-2
1-2
1-2
2-3
2-3
AMD/UMC
RN8
JP37
DX(2) 5v
1-8
Off
DX4 3.45v
Off
On
DX2 3.45v
Off
Off
Enhanced
Off
Off
UMC U5-S
1-8
Off
P24T
1-8
Off
Off
Off
Off
Off
Off
1-2
1-2
Off
1-8
1-8
5-12
Off
1-2
Off
1-2
Off
Off
1-2
2-3
2-3
P24D
1-8
Off
Off
Off
Off
Off
Off
1-2
1-2
Off
1-8
1-8
5-12
Off
1-2
1-2
1-2
1-2
1-2
1-2
2-3
2-3
A
JP38
JP39
JP40
JP20
JP26
JP42
JP65
RN5
RN6
RN7
JPX1
JPX2
JP15
JP18
JP21
JP33
JP34
JP35
JP16
JP17
DX(2) 5v
Off
Off
Off
Off
1-2
Off
1-2
Off
1-8
1-8
5-12
Off
Off
Off
Off
Off
Off
Off
1-2
1-2
DX4 3.45v
On
Off
Off
Off
1-2
Off
1-2
Off
1-8
1-8
5-12
Off
Off
Off
Off
Off
Off
Off
1-2
1-2
DX2 3.45v
On
Off
Off
Off
1-2
Off
1-2
Off
1-8
1-8
5-12
Off
2-3
Off
Off
Off
Off
Off
1-2
1-2
Enhanced
On
Off
Off
Off
Off
1-2
1-2
Off
1-8
1-8
5-12
Off
1-2
1-2
Off
1-2
1-2
1-2
2-3
2-3
UMC U5-S
Off
Off
Off
1-2
1-2
Off
Off
Off
1-8
Off
5-12
Off
Off
Off
Off
Off
Off
Off
2-3
2-3
SL6
Jumperless
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Sound
Memory (Mb)
I/O
Description
ATX
Pentium III/Celeron
1 GHz/667 MHz
Intel 815
Award
6 PCI 1 AMR 1 AGP
Yamaha YMF752-S
512
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Description
Micro ATX
Pentium III/Celeron
233-550
Intel 810E
Award
3 PCI 1 AMR
Notes
Socket 370
66-153 FSB
3 DIMM sockets
2 EIDE controllers, UDMA/66
WB6
Jumperless
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Slot 1
100 FSB
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Acer (Aopen)
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0C-00
Motherboard
MTX A512
Code
Motherboard
2 DIMM sockets
2 EIDE controllers, UDMA/66
17
18
The PC Engineer’s Reference Book – Vol 2: Motherboards
Acermate 386SX/20n
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
I/O
Video
Description
Proprietary
386SX
20
Ali
2 ISA
2S, 1P, Floppy, IDE
Notes
Uses sideways board
On board
Jumper
J4
J7
J8
J10-13,15,16,19,20
Position
On*
Check*
Pass
On
Off*
Reserved
Function
VGA enable
Check Password
Clear Password
IRQ9 to VGA
IRQ9 to expansion card
Do not use
A1GX-1
JPX2
JP13
JP14
JP15
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP25
JP26
JP27
JP32
P24C
NV8T/B
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
3-4
1-2
P24D
2-3
2-3
2-3
2-3
2-3
2-3
1-2
2-3
2-3
1-2
2-3
2-3
1-2
3-4
1-2
AMD DX2
SV8T
2-3
2-3
2-3
2-3
2-3
2-3
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
1-2
AMD DX4
SV8T
2-3
2-3
2-3
2-3
2-3
2-3
1-2
2-3
2-3
2-3
2-3
2-3
2-3
3-4
1-2
AMD DX2
SV8B
2-3
2-3
2-3
2-3
2-3
1-2
1-2
2-3
2-3
1-2
2-3
2-3
1-2
2-3
1-2
*4th 1-2
Jumper
JP1
JP2
JP3
JP4,5
JP6
JP7
JP8
JP9
JP10
Position
1-2
2-3*
1-2
2-3*
1-2
2-3*
JP4
1-2
2-3
1-2
1-2
2-3*
2-3*
1-2
1-2
2-3*
2-3*
1-2
JP5
2-3
1-2
1-2
Function
OEM BIOS
Acer BIOS
Enable Password Check
Bypass Password
COM1 boot
Normal boot
Onboard Memory
4 Mb
8 Mb
Disable
Disable onboard super I/O
Enable
Printer DRQ3
Printer DRQ1
Printer DACK1
Printer DACK3
Enable onboard VGA
IDE port 0F4h, 0F8h, 0FCh
AMD DX4
SV8B
2-3
2-3
2-3
2-3
2-3
1-2
1-2
2-3
2-3
1-2
2-3
2-3
1-2
3-4
1-2
Cyrix/IBM/
TI DX2
Cyrix/IBM
DX4
Cyrix/IBM
5x86
O/D
P24T
2-3
2-3
Open
1-2
1-2
2-3
1-2
1-2
1-2
2-3
1-2
2-3
2-3
3-4
1-2/2-3
2-3
2-3
Open
1-2
1-2
2-3
1-2
1-2
1-2
2-3
1-2
2-3
2-3
3-4
2-3
2-3
2-3
2-3
Open
1st 1-2
Open
1-2
2-3
2-3
2-3*
2-3
Open
2-3*
3-4
1-2
2-3
2-3
2-3
2-3
2-3
2-3
1-2
2-3
2-3
1-2
2-3
2-3
1-2
1-2
1-2
A
Jumper
Position
2-3*
1-5
2-6
3-7
1-2
2-3*
1-2
2-3*
1-2
2-3*
JP30
1-2
2-3
JP11
JP28
JP29
JPX1
JP30,31
Function
IDE port 074h, 078h, 07Ch
25 MHz
33 MHz
40 MHz (not recommended)
Enable Suspend/Resume button
Enable Reset button
Disable onboard IDE
Enable
Flash ROM
EPROM
Cache size
128K, 4 x 32K x 8
256K, 8 x 32K x 8
JP31
1-2
2-3
Front Panel Header
Position
1-2
3-5
7-10
12-13
15-17
19-20
Function
Keylock
Power LED
Speaker
Green LED
Suspend switch
Reset
A1GX-2
JP17
i486
P24C
2-3
i486
3.3v WB
2-3
Cyrix/IBM
/TI DX2
1-2
Cyrix
DX4/100
1-2
TI DX4
/100
1-2
JP18
JP19
JP26
1-2
2-3
2-3
1-2
1-2
1-2
2-3
1-2
2-3
2-3
1-2
2-3
2-3
2-3
2-3
JP27
JP32
JP36
3-4
1-2
1-2
3-4
1-2
1-2
3-4
1-2/2-3
1-2
3-4
1-2
1-2
3-4
1-2
1-2
JP17
JP18
JP19
JP26
JP27
JP32
JP36
Jumper
JP1
JP2
JP3
DX4 NV8T
DX2 NV8B
DX4 NV8B
2-3
2-3
2-3
2-3
3-4
1-2
1-2
2-3
1-2
1-2
1-2
2-3
1-2
1-2
2-3
2-3
1-2
1-2
3-4
1-2
1-2
Position
1-2
2-3*
1-2
2-3*
1-2
Function
OEM BIOS
Acer BIOS
Enable Password Check
Bypass Password
Mono/COM1 boot
Enh AMD
DX2 SV8T
2-3
2-3
1-2
2-3
2-3
1-2
1-2
C5x86
1st 1-2
6th 2-3
7th 2-3
Open
1-2
4th 1-2
5th 1-2
6th 2-3
7th 2-3
3-4
1-2
1-2
Enh AMD
DX4 SV8T
2-3
2-3
1-2
2-3
3-4
1-2
1-2
AMD DX2
NV8T
2-3
1-2
2-3
2-3
2-3
1-2
1-2
Enh AMD
DX2 SV8B
2-3
1-2
1-2
1-2
2-3
1-2
1-2
Enh AMD
DX4 SV8B
2-3
1-2
1-2
1-2
3-4
1-2
1-2
19
20
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP5
JP6
JP7
JP8
JP9
JP10
JP11
JP28
JP29
JP 33
JP35
JPX1
Position
2-3*
2-3
1-2
1-2
2-3*
2-3*
1-2
1-2
2-3*
1-2
2-3*
1-2
2-3*
1-4
2-5
3-7
1-2
2-3*
1-2
2-3*
1-2
2-3
Open
Closed
1-2
2-3*
Function
Normal boot (VGA)
Enable onboard memory
Disable
Disable onboard super I/O
Enable
Printer DRQ3
Printer DRQ1
Printer DACK1
Printer DACK3
Disable onboard VGA
Enable
IDE port 0F4h, 0F8h, 0FCh
IDE port 074h, 078h, 07Ch
25 MHz
33 MHz
40 MHz (not recommended)
Enable Suspend/Resume button
Enable Reset button
Disable onboard IDE
Enable
Feature Connector
I2C interface
IDE LED
IDE, FDD, CD ROM LED
Flash ROM
EPROM
Front Panel Header
Position
1-2
3-5
7-10
12-13
15-17
19-20
Function
Keylock
Power LED
Speaker
Green LED
Suspend switch
Reset
A1G4
JP11
JP12
JP13
JP18
JP20
JP30-32
JP33
JP34-36
JP39
JP40
JP41
JP42
JP43
JP44
JP45
JP46
JP47
JP48
486
1-2
1-2
2-3
2-3
2-3
Open
1-2
Closed
1-2,4-5
2-3
2-3
2-3
Open
Open
Closed
1-2
1-2
Open
ODP 486
1-2
1-2
1-2
2-3
2-3
Open
1-2
Closed
1-2,4-5
2-3
2-3
2-3
Open
Open
Closed
1-2
1-2
Open
P24C
1-2
1-3
1-2
2-3
2-3
Open
1-2
Closed
1-2,4-5
2-3
2-3
2-3
Open
Power
Board
1-2
1-2
Open
P24D
1-2
2-3
1-2
1-2
2-3
Open
1-2
Closed
1-2,4-5
2-3
2-3
2-3
Open
Open
Closed
2-3
1-2
Open
AMD 3.3v
1-2
1-2
1-2
2-3
2-3
Open
1-2
Open
1-2,4-5
1-2
1-2
2-3
Open
Power
Board
1-2
1-2
Open
Cyrix
2-3
1-2
1-2
2-3
1-2
Closed
2-3
Open
1-2,4-5
2-3
2-3
2-3
Open
Open
Closed
1-2
2-3
Open
UMC
1-2
1-2
1-2
2-3
2-3
Open
1-2
Closed
1-2,4-5
1-2
1-2
2-3
Open
Open
Closed
1-2
1-2
Open
TI/Acer
2-3
2-3
2-3
2-3
1-2
Open
1-2
Open
2-3,5-6
2-3
2-3
1-2
Open
Open
Closed
1-2
1-2
Open
A
Jumper
JP2
JP10,17,19
CN14
JP14
JP16
JP20
JP21
JP28
JP30,31
JP37-38
Position
2-3
1-2
JP10
1-2
2-3
2-3
Closed
Open
Open
Closed
1-2
2-3
Closed
Open
1-2
2-3
1-2
2-3
1-2
2-3
JP17
-2
2-3
2-3
JP19
2-3
2-3
2-3
CN14
2-6
3-7
4-8
Function
Enable password check
Disable
CPU Clock
40 MHz
33 MHz
25 MHz
Enable onboard VGA
Disable
Enable onboard local bus IDE
Disable
Intel SL enh or Cyrix CPU
Normal CPU
Enable onboard super I/O
Disable
Enable onboard memory
Disable
128K cache (4 x 32K x 8)
256K cache (8 x 32K x 8)
Enable Reset button
Disable
Front Panel Header
Position
1-2
3-5
7-10
12-13
15-17
19-20
Function
Keylock
Power LED
Speaker
Green LED
Suspend switch
Reset
AP53
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Jumper
JP1,3
JP3
JP4
JP5
JP8
JP10
Description
AT
Pentium
Notes
Intel 430HX
AMI
4 PCI/3 ISA
4 x 72-pin sockets
2S, 1P, floppy, IDE, USB
Position
JP1
1-2,3-4
1-2
3-4
1-2,3-4
In
Out
1-2
2-3
1-2
2-3
1-2,3-4
3-4,5-6
5-6,7-8
Function
Bus Speed
25 MKz
30 MHz
33 MHz
Out for P55C
Enable PS/2 Mouse
Disable
Normal
Clear CMOS
Enable onboard I/O
Disable
3x CPU
4x CPU
5x CPU
21
22
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP11
JP12
JP13
JP 1301
JP1302
Position
1-2,7-8
1-2
3-4
5-6
7-8
9-10
11-12
1-2
3-4
1-2,3-4
JP1301
1-2
2-3
JP1302
1-2
2-3
Function
6x CPU
3.43v Core
3.52v
2.5v
2.7v
2.8v
2.9v
Chipset/PBSRAM Voltage 3.43v
3.52v
In for P55C
Flash ROM Boot Block
Reserved
Enabled
AX6F
Item
Form Factor
CPU
Chipset
BIOS
Memory (Mb)
Cache (K)
I/O
Jumper
JP1-3
JP5,6
JP14
Description
ATX
Pentium II
Intel 82440FX PCIset
Award Flash
512
None
2S, 1P, floppy, IDE, USB, PS/2
Position
JP1
2-3
1-2
1-2
1-2
1-2
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2
2-3
JP5
1-2
2-3
1-2
2-3
JP2
1-2
1-2
1-2
2-3
2-3
1-2
1-2
2-3
2-3
1-2
1-2
2-3
2-3
1-2
JP6
1-2
2-3
Front Panel Header
Position
1-2
3-5
7-10
12-13
15-17
19-20
Function
Keylock
Power LED
Speaker
Green LED
Suspend switch
Reset
JP3
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
Notes
Thermal protection
FPM/EDO. 4 x 72-pin sockets
Function
CPU Frequency Ratio
1.5x
2x
2.5x
3x
3.5x
4x
4.5x
5x
5.5x
6x
6.5x
7x
7.5x
8x
CPU external clock
66 MHz*
60 MHz
Normal operation
Clear CMOS
A
F433T
Jumper
JP2
JP3
J4
JP4
JP6
JY2
JN4
J8
SW1
Position
1-2*
1-2*
1-2*
2-3
In
Out*
N/C
In*
Out
In*
Out
On
Off*
Reserved
Function
33 MHz
486DX
486SX
Discharge battery (erase CMOS)
Charge battery
UPS Connector
Enable system security setup
Disable system security setup
Enable reset switch
Disable reset switch
IRQ9 to VGA
IRQ9 to expansion card
Do not use
ViL5G
Jumper
JP1,2
JP6
JP18
JP19
Position
JP1
1-2,4-5,8-9
1-2,5-6,8-9
1-2,5-6,7-8
2-3,5-6,8-9
JP2
1-2,4-5,8-9
1-2,4-5,8-9
1-2,4-5,7-8
2-3,5-6,8-9
1-2
2-3
1-2
2-3
Function
Cache Size
128K (32Kx4)
256K (64Kx4)
512K (128Kx4)
256K (32Kx8)
Clear CMOS
VESA write 0 wait state
VESA write 1 wait state
VESA bus speed <=33 MHz
VESA bus speed >33 MHz
5v CPU
i486SX/DX
Cyrix DX/DX2
Intel/AMD SX
Intel/AMD
DX2/SL enh
DX/DX2
JP9
1-2
2-3
1-2
1-2
JP10
1-2
2-3
1-2
1-2
JP13
1-2
1-2
Open
Open
JP23
3-4,5-6,7-8
2-3,5-6,7-8
6-7
5-6,7-8
JP24
7-8
2-3,7-8
Open
7-8
JP25
Open
2-3* or Open**
Open
Open
JP26
1-2,5-6
4-5
Open
Open
JP27
4-5,7-8
2-3,7-8
7-8
7-8
*Without voltage regulator – Cyrix CPU in w/t mode only. **With voltage regulator.
3.45v CPU
i486DX4
AMD DX2
JP9
1-2
1-2
JP10
1-2
1-2
JP13
1-2
Open
JP23
3-4,5-6,7-8
5-6,7-8
JP24
7-8
7-8
JP25
Open
3-4*
JP26
1-2,5-6
*
JP27
4-5,7-8
7-8
JP16
1-2
Open
*Connect pin 8 of JP25 to pin 7 of JP26.
AMD DX4
1-2
1-2
Open
5-6,7-8
7-8
3-4
Open
7-8
Open
Cyrix DX2
2-3
2-3
1-2
2-3,5-6,7-8
2-3,7-8
3-4
4-5
2-3,7-8
Open
Intel P24D
1-2
2-3
1-2
1-2,3-4,5-6,7-8
7-8
1-2,5-6
2-3,5-6,7-8
4-5,6-7
23
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The PC Engineer’s Reference Book – Vol 2: Motherboards
32/20
Jumper
S1-4
JP5
S5
S6
S8
JP6-8
JP9
Position
ROM Size
27128
27256
27512
On
Off*
Off*
On
On
Off
Math CoPro
Installed
Not Installed*
Open*
1-2(A)
Function
S1
S2
S3
On*
On*
Off*
Off
Off
On
Off
Off
On
CGA
Mono
20 MHz
SMART Mode (not under Xenix)
ROM Shadow Disabled
ROM Shadow Enabled
JP6
JP7
JP8
1-2
1-2
2-3
2-3*
2-3*
1-2*
2Mb on board
4Mb on board
500+
Jumper
S1
S2
S3-4
S5-8
S1, 7-8
Position
On
Off*
On
Off
S3
Off
On
Off
S5
Off
On
Off
On
S1
Off
Off
S4
On
Off
Off
S6
Off
Off
On
On
S7
On
Off
Position
On
On
Off
On
Off
On
Function
Enable IRQ 2
Enable RTC 0 (300-303)
Enable RTC 1 (2C0-2C3)
Enable COM 2 (2F8-2FF)
Disable COM 2
Enable COM 1 (3F8-3FF)
S8
On
On
Function
Disable Floppy
Enable Floppy
Enable 8087
Disable 8087
Base Mem
640K
512K
256K
Display
Mono 80x25
Colour 80x25
Colour 40x25
EGA etc
Floppy
1 drive
2 drives
710
SW1
Jumper
S1
S2
S3
S4
SW2
Switch
S1
S2
S3-4
Position
On
Off
On
Off
S3
Off
On
Off
S4
Off
Off
On
Function
Disable Floppy
Enable Floppy
Disable 8087-1
Enable 8087-1
Memory
Bank 1
Bank 1 & 2
Bank 1, 2 & 3
S4
Off*
On
On
JP5
2-3
2-3
1-2
A
Switch
S5
S6
S1, 7-8
Position
On
Reserved
On
Off
S1
Off
Off
On
S7
On
Off
S8
On
On
S2
Off
Off
On
On
Off
Off
On
On
Off
Off
On
On
Off
S3
Off
Off
Off
Off
On
On
On
On
Off
Off
Off
Off
On
Function
Reserved
Do not use
Disable display
Enable display
Floppy
1 drive
2 drives
SW3
Switch
S1-4
S5
S6
S7
S8
Position
S1
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
S4
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
On
Function
Bank Address
C0000-C3FFF
C4000-C7FFF
C8000-CBFFF
CC000-CFFFF
D0000-D3FFF
D4000-D7FFF
D8000-DBFFF
DC000-DFFFF
E0000-E3FFF
E4000-E7FFF
E8000-EBFFF
EC000-EFFFF
F0000-F3FFF
3 Mb RAM
768K RAM
RAM Bank enable
RAM Bank disable
64K ROM
40K ROM
10 MHz
4.77 MHz
SW4
Switch
S1
JP1
Position
Colour
Mono
In A
In B
Function
Colour display
Mono display
Disable display
Enable display
910
SW1
Switch
S1-3
S4
Position
S1
Off
Off
On
Off
On
Off
S2
On
On
Off
Off
S3
Off
On
On
On
Function
Memory Size
256K
512K
640K
1024K
0 Wait State
1 Wait State
SW2
Switch
S1-2
5-8
Position
EPROM
27128
27256
Function
S1
On
On
S2
Off
Off
S5
On
Off
S6
Off
On
S7
Off
Off
S8
On
On
25
26
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
S4
JP11
Position
27512
On
Off
H
N
Function
Off
On
Colour Display
Mono Display
High System Speed
Low System Speed
Function
EPROM
27128
27256
27512
Position
S1
On
On
Off
Off
On
S3
Off
On
On
S4
On
Off
Off
S3
On
Off
On
S4
Off
On
Off
Off
On
S5
On
Off
Off
S6
On
On
On
913
SW1
Switch
S1-4
S2
Off
Off
On
SW2
Jumper
S1
S2
S3
S4
Position
Off
On
Off
Off
On
Off
On
Function
12 MHz
8 MHz
Disable Floppy
HD controller installed
No HD controller
Disable COM 1 (3F8-3FF)
Enable COM 1
SW3
Switch
S1-8
Function
Display
EGA
CGA
MGA
Position
S1
Off
Off
Off
S2
On
Off
Off
SW4
Switch
S1-3
Function
Memory Size
512K
640K
512+512K
640+384K
Position
S1
On
Off
On
Off
S2
On
On
Off
Off
S3
On
On
On
On
915
As for System 913
915V
Jumper
JA
JB,C,D
Position
A
Disable COM 1
Disable COM 2
Disable HD
Enable HD
Function
Enable VGA
B
B
A
1100LX
Jumper
JP1
Position
In
Out
Function
512K ROM
256K ROM
C
A
B
B
A
D
B
B
A
A
S7
On
On
On
S8
On
On
On
A
JP2
JP3
In
In
Out*
Maths copro installed
Reset system password
System password disabled
1100/16
Switch
S1-4
JP5
S5
S6
S7, JP9
S8
JP6,7,8
Position
EPROM
27128
27256
27512
On
Off
Off
On
S7
Off
Off
Off
On
JP6
A
B
JP9
A
JP7
A
B
JP8
B
A
Function
S1
S2
On
On
Off
Off
Off
Off
CGA Display
EGA, MGA, MDA Display
20 MHz
SMART speed
Memory
640+1Mb+256
640+3Mb+256
RAM BIOS
ROM BIOS
Maths Copro
There
Not there
S3
Off
On
On
1120SX
Jumper
J1
JP3
Position
In*
Out
A*
B
Function
Detect add-On display and
Disable On-board VGA automatically
Enable password check
Bypass and clear existing password
1100/25
SW1
Switch
S1-4
S5-8
Function
EPROM
27128
27256
27512
I/O recovery delay
0
1
2
3
4
5
6
8
9
10
11
12
13
14
15
Position
S1
On
On*
Off
S5
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
On
On
On
On
S2
Off
Off*
On
S6
Off
Off
Off
Off
On
On
On
Off
Off
Off
Off
On
On
On
On
S3
On
Off*
Off
S7
Off
Off
On
On
On
Off
On
Off
Off
On
On
Off
Off
On
On
S4
Off
On
On
S8
Off
On
Off
On
On
On
Off
Off
On
Off
On
Off
On
Off
On
S4
Off
On
On
JP5
B
B
A
27
28
The PC Engineer’s Reference Book – Vol 2: Motherboards
SW2
Switch
S1
S2
S3
S4
S5-7
S8
S9
S10
JP6-8
JP12
JP13-16
Position
On*
Off
Off*
On
Off*
On
Off*
On
Printer Port
LPT1
LPT2
Off*
On
Off*
On
Off*
On
JP6
1-2
2-3*
1-2*
2-3
RAM
2 Mb
4 Mb
6 Mb
4 Mb
8 Mb
JP7
1-2
2-3*
Function
25-pin=COM1, 9-pin=COM2
9-pin=COM1, 25-pin=COM2
Enable COM1
Disable COM1
Enable COM2
Disable COM2
Enable Printer Port
Disable Printer Port
S5
S6
S7
Off*
Off*
On*
On
On
Off
Shadow RAM enabled
Shadow RAM disabled
Primary display Mono or extended
Primary display CGA
DRAM Bank B enabled
DRAM Bank B disabled
Maths Copro
There
Not there
Remap 256K to FA0000-FDFFFF
Do not remap or permit RAM cacheing of F00000-FFFFFF
Modules
JP13
JP14
JP15
JP16
512 x 9
2-3*
2-3*
1-2*
1-2*
512 x 9
2-3
2-3
1-2
1-2
512 x 9
1-2
1-2
1-2
1-2
1M x 9
1M x 9
1-2
1-2
2-3
2-3
1M x 9
1-2
1-2
2-3
2-3
JP8
1-2
2-3*
Bank
A
A&B
A
B
A
A&B
1100/33
As for 1100/25
1120C
As for 1100/25
1133T
Jumper
J4
J6
JA1
Position
In*
Out
1-2*
2-3
32K cache
64K cache
128K cache
Function
Setup accessible
Setup inaccessible
Normal CMOS state
Discharge CMOS
5-6
1-2*
5-6*
1-2
4-5
1170
Jumper
JP1-3
JP4
Position
JP1
Out*
In
1-2
2-3*
JP2
Out
In*
JP3
Out*
In
Function
Tuning write timing
Open
Close
27512 EPROM
27256 EPROM
A
Jumper
JP5
JP6
JP7
JP8
JP9
JP10
Position
1-2*
2-3
Out
In*
1-2
2-3*
1-2*
2-3
1-2
2-3*
Function
Enable I/O recovery
Disable I/O recovery
Disable Parity Check
Normal parity operation
UPS interface
INIT directly connected to onboard controller
INIT pass through buffer
Enable power-on password in setup
Disable power-on password in setup
DMA timing low speed
DMA timing 25 MHz
Daughterboard
Jumper
JP1
JP2
JP3
Position
1-2*
2-3
1-2
2-3*
1-2*
2-3
Function
TCR always high
TCR connects 486 to system board
WRDYIN signal
Cascade JP3-2
80486 RDY signal
80486 B13 not connected
Position
On*
Off
1-2*
2-3
1-2
2-3*
On
Off*
1-2
2-3*
1-2*
2-3
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
Function
Keyboard and reset button active
Keyboard and reset button locked
80486/7 in socket B
80486SX in socket B
27512 EPROM
27256 EPROM
Discharge CMOS
Normal
Other Acer display card (Normal VGA)
ATI Onboard display (faster VGA performance)
16-bit ROM
8-bit ROM
Enable Floppy
Disable Floppy
Enable HD controller
Disable HD controller
Enable COM1
Disable COM1
Enable COM2
Disable COM2
Enable LPT1
Disable LPT1
Reserve 15-16 Mb for system
Enable add-On card
Enable reset function
Disable reset function
Enable password security
Disable password security
Position
1-2
Function
Indicate hardware errors in Intel chipset (EBC and ISP)
1172
Jumper
JP3
JP5
JP15
JP18
JP22
JP71
S1
S2
S3
S4
S5
S6
S7
S8
1200
Jumper
JP1,4
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30
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP2
JP3
JPX2
JPX3
JPX4
JPX5
JPX6
JPX7
Position
1-2*
2-3
2-3*
1-2
1-2
2-3*
1-2
2-3*
2-3*
1-2
1-2*
2-3
1-2*
2-3
1-2
2-3
Function
512/256K EPROM
128K EPROM
128/256K EPROM
512K EPROM
Page miss; for debugging only
Detect page hit or miss
Forces CHHIT high for cache miss; debugging only
Detect cache hit or miss (CHHIT low if hit)
Fast CPU reset
Normal CPU reset
9 ns RAS delay
20 ns RAS delay
Enable password security
Disable password security
CLK1
DCLK; debugging only
1733
Jumper
JP1
JP2
JP3,4
JP5
JP6
JP7
JP8
TP1
J4
J5,6
J7,8
J9
S1
S2
S3
Position
1-2
2-3*
JP3
Out
In*
In*
Out
JP4
Out
In*
1-2
2-3
In*
Out
1-2*
2-3
1-2
2-3*
CPU type
80486 33
80386 33
1-2
2-3*
On*
Off
On*
Off
On
Off
Function
UPS sense signal input
No reset
Fast RC reset
MB Clock
Disconnect
Connect
3 BCLK I/O recovery time
1 BCLK I/O recovery time
External speaker
External speaker
Onboard buzzer
Dual Bus arbitration
Single Bus arbitration
Normal LCS
Delayed LCS
Latched IRQ INTR
Unlatch INTR
J5
J6
Out*
In*
In
Out
Reserved
Show OEM BIOS message
Show Acer BIOS message
System security bypassed
Not bypassed
Enable reset function
Disable reset function
CPU 64 bit bus (486/33, 50)
CPU 32 bit bus (486SX, 386)
1933T
Jumper
J1
J2
J3
J4
Position
1-2
1-2
1-2*
2-3
Function
Keyboard/mouse connector
33 MHz CPU speed
486DX
486SX
A
Jumper
JP4
JP6
JY2
JY5
JN4
Position
In
Out
In*
Out
2-3*
In*
Out
SW1
Function
Discharge battery, erase CMOS
Charge battery
UPS connector
Enable system security setup
Disable system security setup
For chipup CPU
Enable reset switch
Disable reset switch
Reserved
3000SP33
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
JP9
JP10
JP11
JP13
Position
1-2
2-3
1-2*
2-3
1-2*
2-3
1-2
2-3*
1-2*
2-3
1-2*
2-3
1-2
2-3
1-2
1-2
2-3
1-2
2-3
Function
UPS present
UPS not present
Enable password security
Disable password security
512/256K EPROM
128K EPROM
512K EPROM
256/128K EPROM
I/O recovery time added
No /O recovery time added
Latched interrupt
Unlatched interrupt
25 MHz CPU (Acer 1200/25)
33 MHz CPU (Acerframe 3000SP33)
Disable page hit cycle (for diags)
Cache hit cycle disabled (diags)
Cache hit cycle enabled (normal ops)
Speaker on JP14
On board buzzer
Daughterboard
Jumper
JP1
JP2
JP3
Position
1-2
2-3*
1-2
2-3*
1-2*
2-3
Function
CPU read 4167 with 0 wait state
CPU read 4167 with 1 wait state
WRDY: system board ready
WRDY1#: cascade to JP3
RDY: i486 ready
Reserved – do not use
Position
1-2
2-3
Open
Closed
1-2
2-3
1-2
2-3
1-2
2-3
Function
Check password
Bypass
Disable reset button
Enable
Acer BIOS
OEM
128 or 256 byte RTC NVRAM
4K, reserved
Buzzer
Speaker
M3
Jumper
JP1
JP2
JP3
JP4
JP6
31
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Ali CPU Board (3.3v)
PCB 94414-1. Max 133 MHz. As for M5
Pentium CPU Board
PCB 94323-1
Jumper
JP1
Position
1-2
2-3
Function
Pentium 90
Reserved
M3A
Jumper
JP1
JP2
JP3
JP4-6
JP7-9
JP3 (?)
JP10
JP11
Position
1-2
2-3
1-2
2-3
1-2
2-3
JP4
2-3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
3-4
1-2
2-3
JP5
1-2,4-5
1-2,3-4
2-3,4-5
1-2,3-4
2-3,4-5
1-2,3-4
2-3,4-5
2-3,4-5
JP6
2-3
2-3
2-3
1-2
1-2
1-2
1-2
2-3
Function
Acer BIOS logo
No logo
Check password
Bypass
Buzzer
Speaker
CPU frequency
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
P54C
P55C
256K cache
512K cache
Enable SMM switch
Enable reset switch (e.g. normal power supply)
Additional reset switch
CPU VR voltage (3.3-3.46v)
CPU VRE voltage (3.45-3.6v)
M5
Dual Pentium
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Open
Short
1-2
2-3
Function
Acer BIOS logo
OEM logo
Check password
Bypass
DREQ1
DREQ3
DACK1
DACK3
Disable reset button
Enable
Buzzer
Speaker
CPU/Memory Board
PCB 93404-1. Max 133 MHz
Jumper
JP1,13
Position
JP1
1-2
JP13
2-3
Function
Cache size
256K
A
Jumper
JP2
JP12,14,15
JP17,18
Position
2-3
1-2
2-3
JP12
1-2
2-3
JP17
Short
1-1
1-2
JP14
Short
Open
JP18
Short
2-2
JP15
Short
Open
Function
512K
3/2 bus core ratio
2/1
SRAM
Standard
Synchronous
SRAM
Standard
Synchronous (1 of 17,18, 2 of 17,18)
CPU/Memory Board
PCB 93404-2. Max 166 MHz
Jumper
Position
JP1,13
JP1
1-2
2-3
JP2,3
JP2
1-2
2-3
2-3
JP12,14,15
JP12
1-2
2-3
JP17,18
JP17
Short
1-1
JP13
2-3
1-2
JP3
1-2
1-2
2-3
JP14
Short
Open
JP18
Short
2-2
JP15
Short
Open
Function
Cache size
256K
512K
Bus core ratio
3/2
2/1
5/2
SRAM
Standard
Synchronous
SRAM
Standard
Synchronous (1 of 17,18, 2 of 17,18)
Ali CPU Board (3.3v)
PCB 94414-1. Max 133 MHz
Jumper
JP1
JP2
JP4
JP5,7
JP6
JP8
Position
Open
1-2
2-3
Open
1-2
2-3
JP5
1-2
2-3
2-3
Closed
Open
JP7
1-2
2-3
Function
50 MHz host clock
60 MHz
66 MHz
Reserved
CPU VR voltage (3.3-3.46v)
CPU VRE voltage (3.45-3.6v)
L2 Cache size
256K
1Mb
Reserved
2/1 bus core ratio
3/2
Ali CPU Board (3.3v)
PCB 94414-2. Max 166 MHz
Jumper
Position
JP1
Open
1-2
2-3
JP2
Open
JP4
1-2
2-3
JP5,7
JP5
JP7
1-2
1-2
2-3
2-3
JP6
2-3
JP8
Closed
Function
50 MHz host clock
60 MHz
66 MHz
Reserved
CPU VR voltage (3.3-3.46v)
CPU VRE voltage (3.45-3.6v)
L2 Cache size
256K
1Mb
Reserved
2/1 bus core ratio
33
34
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
Open
(?)
Function
3/2
5/2
M7
Jumper
JP1
JP2
JP3
JP4-5,7
JP6
JP8
JP9
JP10
JP11
JP12
CN16
Position
1-2
2-3
1-2
2-3
1-2
2-3
JP4
2-3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
3-5
7-10
12-13
15-17
19-20
JP5
2-3
2-3
2-3
1-2
1-2
1-2
1-2
2-3
JP7
1-2
2-3
3-4
2-3
3-4
2-3
3-4
3-4
Function
CPU VR voltage (3.3-3.46v)
CPU VRE voltage (3.45-3.6v)
SCSI terminator on
Software settings
256K cache
512K cache
CPU frequency
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
16-bit (Wide) SCSI
8-bit
Acer BIOS logo
No logo
Check password
Bypass
Buzzer
Speaker
Front panel reset enabled
256K BIOS enabled (fixed setting)
Keylock
Power LED
Speaker
Green (Turbo)LED
Turbo switch
Reset
M9B
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
1-2
2-3
Function
Check password
Bypass
Acer BIOS logo
OEM
SCSI terminator on
BIOS settings
Wide SCSI
Narrow SCSI
Enable hardware reset
Buzzer
Speaker
CPU/Memory Board
Jumper
CN1
Position
1-5,2-6,3-7,4-8
1-5,2-6,4-8
1-5,2-6,3-7
1-5,2-6
Function
2x CPU
3x
4x
2.5x
A
Jumper
CN2 (CPU 1)
CN3 (CPU 2)
J16
Position
2-6,4-8
1-5
Short
Short
Short
Short
Short
Short
Short
Short
Open
Open
Open
Open
Open
Open
Open
Open
1-2
2-3
2-6
Short
Short
Short
Short
Open
Open
Open
Open
Short
Short
Short
Short
Open
Open
Open
Open
3-7
Short
Short
Open
Open
Short
Short
Open
Open
Short
Short
Open
Open
Short
Short
Open
Open
4-8
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Function
3.5x
CPU 1 & 2 Voltage
3.5v
3.4v
3.3v
3.2v
3.1v
3v
2.9v
2.8v
2.7v
2.6v
2.5v
2.4v
2.3v
2.2v
2.1v
No CPU
66 MHz host clock
60 MHz
M9N
Jumper
JP1
JP2
JP3
JP4
JP5
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Open
1-2
2-3
Function
Enable software control for CN4 (power supply)
Disable
Branded BIOS type
Generic
Check password
Bypass
SCSI Channel 1 High-byte termination always on
Software control
Off
Normal (Auto VGA)
Disable onboard VGA
CPU/Memory Board
Jumper
JP1
JP2
JP5
Position
1-2,3-4,5-6,7-8
1-2,3-4,7-8
1-2,3-4,5-6
1-2,3-4
1-2,7-8
1-2
2-3
1-2
2-3
Function
2x CPU
3x
4x
2.5x
3.5x
ITP CPU 1
ITP CPU 2
66 MHz Host bus
60 MHz
M11A
Pentium Pro
Jumper
J4
J5
Position
1-2
2-3
1-2
2-3
Function
128K Flash ROM
256K Flash ROM
Check password
Bypass
35
36
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J6
J9
J10
J13
CN13
CN14
JMP1
Position
Open
1-2
1-2
2-3
Open
1-2
2-3
1-2
2-3
1-5,2-6,3-7,4-8
1-5,2-6,4-8
1-5,2-6,3-7
1-5,2-6
2-6,3-7,4-8
2-6,4-8
1-5
2-6
Short
Short
Short
Short
Short
Short
Short
Short
Short
Open
Short
Open
Short
Open
Short
Open
Open
Short
Open
Short
Open
Short
Open
Short
Open
Open
Open
Open
Open
Open
1-2
2-3
3-7
Short
Short
Open
Open
Short
Short
Open
Open
Short
Short
Open
Open
Short
Short
Open
4-8
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Short
V12LC
Switch
JP1
JP2
JP3
JP4,5
JP6
JP7
JP8
JP9
JP11
JP12
JP13
JP14
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
1-2
1-4
2-5
3-6
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
Function
Acer BIOS
OEM
Check password
Bypass
Flash ROM
EPROM
ECP DMA1 using DRQ1 and DACK1
ECP DMA3 using DRQ3 and DACK3
Disable onboard I/O
Disable onbaord VGA
50 MHz host clock
60 MHz host clock
66 MHz host clock
Disable EIDE
Enable
No delay for M1451
Delay ADS# by 1 CPU clock cycle
P54C or K5
Cyrix M1
3.38v CPU
3.52v CPU
3/2 clock frequency
Function
Narrow SCSI
Wide SCSI
60 MHz host clock
66 MHz
SCSI terminator off
On
BIOS settings
Buzzer
Speaker
2x CPU
3x
4x
5x
2.5x
3.5x
CPU Voltage
3.5v
3.4v
3.3v
3.2v
3.1v
3v
2.9v
2.8v
2.7v
2.6v
2.5v
2.4v
2.3v
2.2v
2.1v
Reset
Enable SMM
A
Switch
JP15
CN6
Position
2-3
1-2
2-3
1-2
3-5
7-10
12-13
15-18
19-20
Function
2/1
Reset switch in suspend mode
As reset switch
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
V12LC-2X
Switch
JP1
JP2
JP3
JP6
JP8
JP12
JP13
JP14,18
JP15
JP16,17
JP19
JP20
CN6
Position
1-2
2-3
1-2
2-3
Open
1-2
2-3
1-2
1-4
2-5
3-6
1-2
2-3
1-2
2-3
JP14
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Open
1-2
2-3
1-2
3-5
7-10
12-13
15-18
19-20
JP18
1-2
1-2
2-3
2-3
Function
Acer BIOS
OEM
Check password
Bypass
SST 29EE010 BIOS ROM
EPROM
Flash ROM (Intel 28F010, 28F001, 28F101)
Disable onboard I/O
50 MHz host clock
60 MHz host clock
66 MHz host clock
P54C or K5
Cyrix M1
3.38v CPU
3.52v CPU
Intel
M1/K5
Clock Ratio
3/2
3/2,2/2,3/1
2/1
1/1
3/1
3/2,2/2,3/1
5/2
1/1
Reset switch in suspend mode
As reset switch
CN1 as feature connector
CN1 as 12C interface
Reserved (HD LED)
Programming boot block
Normal
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
V20
Switch
JP1
JP2
JP3
JP4
JP6
Position
1-2
2-3
1-2
2-3
3-4
1-2,3-4,5-6
2-3
Function
Check password
Bypass
Acer BIOS
OEM
Reserved
Reserved
Reserved
37
38
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
JP7
JP8
JP10
JP9,20
JP11
JP12
JP22
JP23
JP24
CPU
25 MHz
33 MHz
50 MHz
66 MHz
100 MHz
Am 66 MHz
Am 100 MHz
Position
2-3
1-2
2-3
1-2
JP9
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
3-4
1-2
2-3
1-2
2-3
JP17
1-5
2-6
1-5
2-6
2-6
2-6
2-6
JP20
2-3
1-2
Function
Reserved
Enable M5115
Disable
Reserved
CPU Type
P24D/P24T (Overdrive)
486-S
Local IDE I/O address 0FXH
Local IDE I/O address 07XH
Disable local IDE
Enable
DX4 3x
2.5x
2x
Enable reset button
Disable
Reset becomes Suspend
Normal
JP21
2-3
2-3
2-3
2-3
2-3
2-3
2-3
JP26
1-2
1-2
1-2
1-2
1-2
2-3
2-3
JP27
1-2
1-2
1-2
1-2
1-2
2-3
2-3
V30-1
Switch
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP9
JP10
JP11,13
CN13
JP12
JP15
JP16
JP17
JP19
Position
Open
Open
Closed
1-2
2-3
1-2
2-3
Open
Closed
1-2
1-2
2-3
Closed
Closed
JP11
JP13
1-2
1-2
2-3
1-2
2-3
1-2
2-3
2-3
2-3
2-3
2-3
1-2
2-3
1-2NetWare 3x has 5 areas
Open
Closed
CN13
1-4,2-5
1-4,3-6
2-5
1-4,3-6
2-5
Function
Reserved
LPT Normal
LPT ECP
DRQ3 for LPT ECP
DRQ1
DACK3 for LPT ECP
DACK1
Disable PS/2 mouse (IRQ 12)
Enable
Enable SMC 665
Check password
Bypass
Reserved
Reserved
CPU Frequency
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
Reserved
Clear RTC
Normal
Reserved
Reserved
Reserved
A
Switch
JX21
CN16
Position
1-2
2-3
1-2
3-5
7-10
12-13
15-18
19-20
Function
VR or standard CPU (3.3v)
VRE CPU (3.6v)
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
V30-2
Switch
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
JP11
JP12
JP15
JP18
JP19
JP22
JP20
CN16
CPU
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
Position
Open
Open
Closed
1-2
2-3
1-2
2-3
Open
Closed
1-2
2-3
1-2
2-3
1-2
2-3
Open
1-2
Open
1-2
1-2
1-2
Open
Closed
1-2
2-3
1-2
3-5
7-10
12-13
15-18
19-20
JP13
1-2
2-3
2-3
2-3
2-3
2-3
2-3
Function
Reserved
LPT Normal
LPT ECP
DRQ3 for LPT ECP
DRQ1
DACK3 for LPT ECP
DACK1
Disable PS/2 mouse (IRQ 12)
Enable
Enable SMC 665
Disable
Check password
Bypass
Acer BIOS
OEM
Reserved
Reserved
Reserved
Reserved
Clear RTC
Reserved
Reserved
Reserved
VR or standard CPU (3.3v)
VRE CPU (3.6v)
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
JP14
1-2
1-2
1-2
1-2
1-2
2-3
2-3
JP15
1-2
1-2
1-2
2-3
2-3
2-3
2-3
CN12
1-3,2-4
1-3
2-4
1-3
2-4
1-3
2-4
39
40
The PC Engineer’s Reference Book – Vol 2: Motherboards
V35
Switch
JP1
JP3
JP5
JP7
JP10
CN16
CPU
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
3-5
7-10
12-13
15-18
19-20
JP4
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
Function
Check password
Bypass
64 Mb cacheable memory
512 Mb
3.3v CPU
3.6v CPU
Disable L2 cache
256K
Enable SMI switch
Enable reset switch
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
JP8
1-2
1-2
1-2
2-3
2-3
2-3
2-3
1-2
JP9
1-2
1-2
1-2
1-2
1-2
2-3
2-3
2-3
CN12
1-3,2-4
2-4
1-3
2-4
1-3
2-4
1-3
1-3
V35N
Switch
CN10,
11,X1
JP1
JP2
JP3
JP5
JP6
JP7
JP10
CN16
Position
CN10
1-3,2-4
Open
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
3-5
7-10
12-13
15-18
19-20
CN11
1-3,2-4
Open
CNX1
Open
1-5,2-6,3-7,4-8
Function
CPU Type
P54C
P55C
Check password
Bypass
Acer BIOS logo
OEM
64 Mb cacheable memory
512 Mb
3.3v CPU
3.6v CPU
60 MHz DRAM refresh rate
66 MHz
Disable L2 cache
256K
Enable SMI switch
Enable reset switch
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
A
CPU
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
233 MHz
JP4
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
JP5
1-2
1-2
2-3
1-2
2-3
1-2
2-3
2-3
2-3
JP8
1-2
1-2
1-2
2-3
2-3
2-3
2-3
1-2
1-2
JP9
1-2
1-2
1-2
1-2
1-2
2-3
2-3
2-3
1-2
CN12
1-3,2-4
2-4
1-3
2-4
1-3
2-4
1-3
1-3
1-3
V50LA-N
Switch
JP2
JP3
JP4
JP5
JP6
JP7,8
JP9
JP10,11
JP12
CN16
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
3-4
1-4
2-5
3-6
JP7
1-2
1-2
2-3
1-2
2-3
JP10
1-2
1-2
2-3
2-3
1-2
2-3
1-2
3-5
7-10
12-13
15-18
19-20
JP8
1-2
2-3
2-3
JP11
1-2
2-3
1-2
2-3
Function
Acer BIOS logo
OEM
Check password
Bypass
Enable Flash ROM boot block
Disable
Reserved
Flash ROM (Intel 28F001)
Flash ROM (SST, Winbond 29EE010)
50 MHz host clock
60 MHz
66 MHz
L2 cache
256K
512K
1 Mb
P54C or K5
Cyrix M1
Intel
M1/K5
Clock Ratio
3/2
3/1
2/1
2/1
3/1
5/2
3.38v CPU
3.52v CPU
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
V55-2
Switch
SW1-2
SW3-4
JP4
Position
SW1
On
On
Off
Off
SW3
On
Off
On
1-2
SW2
Off
On
On
Off
SW4
Off
On
On
Function
CPU Clock Ratio
3x
2.5x
2x
1.5x
Host bus clock
66 MHz
60 MHz
50 MHz
EPROM
41
42
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
JP5
JP6
JP7
JP8,9
JP10
JP11
CN16
Position
2-3
1-2
2-3
3-4
1-2
2-3
1-2
2-3
1-2
2-3
2-3
Open
Closed
1-2
3-5
7-10
12-13
15-18
19-20
Function
Flash ROM
NC ROM
29EE010
28F001
3.2v CPU core
2.8v (P55C)
3.5v CPU I/O voltage
3.3v
512K cache
256K cache
Reserved
Normal
Clear CMOS (No jumper, just short pads)
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
V55LA
Jumper
SW2/1-2
SW2/3-4
SW2/5
SW2/6
JP1
JP2
JP3,4
JP5
JP6
JP7
JP11
JP16
JP42
JP43
Position
1
On
On
Off
3
On
Off
On
Off
On
On
Off
1-2
2-3
1-2
2-3
JP3
1-2
1-2
2-3
1-2
2-3
1-2
2-3
Open
Closed
Open
1-2
2-3
3-4
1-2
2-3
1-2
2-3
1-2
2-3
2
On
Off
On
4
On
Off
Off
On
JP4
1-2
2-3
2-3
Function
Host clock frequency
50 MHz
60 MHz
66 MHz
Intel
M1
K5 Clock Ratio
5/2
1/1
2/1
3/2
3/1
3/2
2/1
2/1
3/1
4/1
Disable onboard sound
Bypass password
Check password
Acer BIOS
OEM
LED for IDE and FDD
IDE only
Cache size
256K
512K
1 Mb
Allow boot block programming
Normal
Flash ROM (28F010)
EPROM
Block Flash EPROM (SST 29EE010)
Single voltage CPU
Dual voltage
SMM switch
Reset switch
Additional reset switch
UPS enabled for software shutdown
Disabled
L2 cache Intel/M1 1+4 mode
L2 cache M1 Linear Burst mode
3.5v CPU I/O voltage
3.3v
A
Jumper
JP44
CN19
Position
1-2
2-3
1-2
3-5
7-10
12-13
15-18
19-20
Function
2.5v CPU core voltage
2.8v
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
V55LA-2
Jumper
SW2/1-4
Intel
Cyrix/IBM
M1
Cyrix
M2
AMD K5
AMD K6
SW2/5
SW2/6
JP1
JP2
JP3,4
JP7
JP11
JP16
JP43
JP44
Position
1
On
On
Off
On
Off
On
Off
Off
On
On
Off
Off
On
Off
On
On
Off
On
Off
Off
Off
Off
Off
On
On
Off
1-2
2-3
1-2
2-3
JP3
1-2
1-2
2-3
Closed
Open
1-2
2-3
3-4
1-2
2-3
1-2
2-3
1-2
2
On
Off
On
Off
On
Off
On
On
On
Off
On
On
Off
On
On
Off
On
Off
On
On
On
On
On
JP4
1-2
2-3
2-3
3
Off
Off
Off
On
On
On
On
Off
On
On
On
On
Off
Off
Off
Off
Off
On
On
On
On
Off
Off
4
Off
Off
Off
Off
Off
On
On
On
Off
Off
Off
On
On
On
Off
Off
Off
Off
Off
On
On
On
Off
Function
CPU Frequency
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
P120+
P150+
P166+
PR166
PR180
PR200
PR75
PR90
PR100
PR120
PR133
PR166
PR166
PR200
PR233
Disable onbaord sound
Bypass password
Check password
Acer BIOS
OEM
LED for IDE and FDD
IDE only
Cache size
256K
512K
1 Mb
Single voltage CPU
Dual voltage
SMM switch
Reset switch
Additional reset switch
UPS enabled for software shutdown
Disabled
3.5v CPU I/O voltage
3.3v
2.5v CPU core voltage
43
44
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
CN19
Position
2-3
1-2
3-5
7-10
12-13
15-18
19-20
Function
2.8v
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
V56LA
Jumper
JP8-9
JP13-15
JP17
Intel
Intel
MMX
Cyrix 6x86
Cyrix 6x86L
AMD K5
AMD K6
JP1
JP3
JP4
JP6
JP7
JP16
JP18
JP19
JP20
JP3001
CN19
Position
JP8
3-6
2-5
3-6
2-5
3-6
3-6
3-6
3-6
1-4
2-5
3-6
1-4
2-5
3-6
2-5
3-6
2-5
3-6
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
3-5
7-10
12-13
15-18
19-20
JP9
On
On
On
On
On
On
Off
Off
On
On
On
Off
Off
Off
On
On
On
On
JP13
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
JP14
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
JP15
1-2
1-2
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
2-3
JP17
1-2
2-3
1-2
2-3
2-3
1-2
2-3
1-2
2-3
2-3
2-3
2-3
2-3
2-3
1-2
1-2
2-3
2-3
Function
CPU Frequency
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
166 MHz
200 MHz
P120+
P150+
P166+
P120+
P150+
P166+
PR120
PR133
PR150
PR166
Disable VGA
Enable
Acer BIOS
OEM
Check password
Bypass
256K cache
512K cache
1 Mb BIOS ROM
2 Mb BIOS ROM
L2 cache Interleave mode
L2 cache Linear Burst mode
CN20 LED for IDE and FDD
IDE only
19-20 of CN17 suspend/resume
As reset button
UPS enabled (CN21)
Disabled
Reserved
Keylock
Power LED
Speaker
Green mode
Turbo
Reset
A
V58-1X
Jumper
S1-3
JP14,15
Intel
Cyrix 6x86
Cyrix M2
AMD K6
S4
JP1,15
JP2
JP4
JP5
JP6
JP7
JP8
JP9
JP10
JP11
Position
JP14
1-3,2-4
3-5,4-6
1-3,2-4
3-5,4-6
1-3,2-4
3-5,4-6
3-5,4-6
3-5,4-6
1-3,2-4
3-5,4-6
3-5,4-6
1-3,2-4
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
On
Off
JP1
1-3,2-4
3-5,4-6
1-2
2-3
1-2
2-3
1-2
2-3
3-4
2-3
1-2
3-4
5-6
1-3,2-4
3-5,4-6
1-2
3-4
2-3
1-2
3-4
5-6
7-8
9-10
11-12
13-14
JP15
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
S1
Off
Off
On
On
On
On
Off
Off
On
On
On
Off
Off
3-5,4-6
3-5,4-6
3-5,4-6
S2
Off
Off
Off
Off
On
On
On
Off
Off
Off
On
On
On
On
On
Off
S3
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
Off
JP15
1-2
2-3
Function
CPU Frequency
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
233 MHz
P150+
P166+
PR166
PR180
PR200
PR166
PR200
PR233
Check password
Bypass
Power supply type
Traditional power supply
Resume power supply
LED for IDE & FDD
IDE only
L2 cache Interleave/1+4 mode
L2 cache Linear Burst mode
12v for MXIC BIOS program
5v for SST, ATMEL
Reserved
Reserved
Monitor 3.2v CPU core voltage
Monitor 2.9v CPU core voltage
Monitor 2.8v CPU core voltage
Dual voltage CPU (P55C, K6, 6x86L)
Single voltage CPU
Monitor 3.5v CPU I/O voltage
Monitor 3.3v CPU I/O voltage
Reserved
3.3v CPU core voltage
2.8v
2.9v
3.2v
3.5v
2.1v
Reserved
V58LA
Jumper
S1/4,5
JP14,15
Intel
Position
JP14
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
JP15
1-3,2-4
3-5,4-6
1-3,2-4
3-5,4-6
1-3,2-4
CN23
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
S1/4
Off
Off
Off
Off
On
S1/5
Off
Off
On
On
On
Function
CPU Frequency
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
45
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Cyrix 6x86
Cyrix 6x86L
AMD K5
AMD K6
S1
S2
S3
S4
JP1
JP2
JP3
JP5
JP10
CN23
CN36
Position
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
On
Off
On
On
On
Off
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-3,2-4
3-5,4-6
1-2
3-4
5-6
7-8
9-10
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
1-3,2-4
3-5,4-6
1-3,2-4
3-5,4-6
1-3,2-4
3-5,4-6
1-3,2-4
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
3-5,4-6
1-3,2-4
1-3,2-4
3-5,4-6
3-5,4-6
3-5,4-6
1-3,2-4
1-3,2-4
3-5,4-6
3-5,4-6
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
1-3,2-4
3-5,4-6
3-5,4-6
3-5,4-6
On
On
On
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
On
Off
On
Off
On
Off
Off
On
On
On
On
Off
Off
On
On
On
On
Off
Off
V60N
Switch
JP1
JP3
JP4
JP9-10
12-13
Position
1-2
2-3
1-2
2-3
1-2
2-3
JP9
2-3
2-3
2-3
1-2
2-3
1-2
1-2
1-2
JP10
2-3
2-3
2-3
1-2
2-3
2-3
2-3
2-3
JP12
2-3
2-3
1-2
2-3
1-2
2-3
2-3
1-2
JP13
2-3
1-2
2-3
2-3
1-2
2-3
1-2
2-3
Function
Check password
Bypass
Acer BIOS
OEM
128K Flash ROM
256K Flash ROM
CPU voltage
3.5v
3.4v
3.3v
3.2v
3.1v
3v
2.9v
2.8v
Function
166 MHz
200 MHz
166 MHz MMX
200 MHz MMX
233 MHz MMX
P150+
P166+
P150+
P166+
PR90
PR100
PR120
PR133
PR166
PR166
PR200
PR233
Bypass password
Check password
Disable onboard sound
Disable onboard LAN
Cypress CY2273
CLK 9148
Acer BIOS
OEM
LED for IDE & FDD
IDE only
Suspend
Reset
L2 cache Interleave/1+4 mode (Intel/Cyrix M1/M2)
L2 cache Linear Burst mode (Cyrix M1/M2)
Standby power supply -> 1A
Standby power supply < 1A
Single voltage CPU
Dual voltage CPU
2.8v CPU core voltage
2.9v
3.2v
3.31v
3.52v
A
Switch
JP11
JP15
Position
2-3
1-2
2-3
1-4
2-5
3-6
1-2
2-3
CPU
150 MHz
166 MHz
180 MHz
200 MHz
SW1
On
Off
On
Off
1-2
2-3
1-2
SW2
Off
On
Off
On
2-3
1-2
1-2
SW3
Off
Off
Off
Off
Function
2.7v
2.6v
2.5v
Software shutdown
External SMI
Reset
12v BIOS
5v BIOS
2-3
1-2
1-2
SW4
Off
Off
Off
Off
SW5
On
On
On
On
SW6
Off
Off
On
On
SW7
On
On
Off
Off
V65LA
As for V65X, except:
Switch
CN16
Position
3-5
12-13
19-20
Function
Power LED
Turbo LED
Reset
V65X
Switch
SW1
SW2
SW3
SW5-8
CN12
Position
On
Off
On
Off
On
Off
SW5
On
Off
Off
3-5
12-13
19-20
SW6
Off
On
On
SW7
Off
On
Off
SW8
On
On
On
J4/9
Short
Short
Short
Short
Open
Open
Open
Open
Short
Short
Short
Short
J3/8
Short
Short
Open
Open
Short
Short
Open
Open
Short
Short
Open
Open
J2/7
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Short
Open
Function
60 MHz host
66 MHz
Bypass password
Check password
OEM BIOS
Acer BIOS
CPU speed
233 MHz
266 MHz
300 MHz
Power LED
Turbo LED
Reset
X1B
Dual Pentium Pro
Jumper
JP2-5
7-10
Position
J5/10
Short
Short
Short
Short
Short
Short
Short
Short
Open
Open
Open
Open
Function
CPU 1 & 2 Voltage
3.5v
3.4v
3.3v
3.2v
3.1v
3v
2.9v
2.8v
2.7v
2.6v
2.5v
2.4v
SW8
On
On
On
On
47
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J12
J13
J14
J15
J16
J18
J19
CN15
J1501
Position
Open
Open
Open
Open
Open
Open
Open
Open
1-2
2-3
Open
Closed
Open
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-5,2-6,3-7,4-8
1-5,2-6,4-8
1-5,2-6,3-7
1-5,2-6
2-6,3-7,4-8
2-6,4-8
1-2
2-3
Short
Short
Open
Open
Short
Open
Short
Open
X3
Quad Pentium Pro
Jumper
JPX1-3
JP1, 2
JP3
JP4,5
JP6,7
JP8,9
JP11
JP12
JP13
JP14
JP15
Position
1-2,3-4,5-6,7-8
1-2,3-4,7-8
1-2,3-4,5-6
1-2,3-4
3-4,5-6,7-8
3-4,7-8
JP4
JP5
2-3
Open
1-2
1-2
1-2
2-3
JP6
JP7
2-3
Open
1-2
1-2
1-2
2-3
JP8
JP9
2-3
1-2
1-2
2-3
2-3
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Open
Function
Reserved
Reserved
2x CPU
3x
4x
5x
2.5x
3.5x
Group 2 CPUs (2 & 4)
2 only
4 only
2&4
Group 1 CPUs (1 & 3)
1 only
3 only
1&3
Groups 1 & 2
1 only
2 only
1&2
Check password
Bypass password
Reserved
Enable onboard VGA
Disable
Reserved
60 MHz host clock
66 MHz host clock
50 MHz host clock
Function
2.3v
2.2v
2.1v
No CPU
60 MHz host bus
66 MHz host bus
Narrow SCSI
Wide SCSI
Reserved
Reserved
Termination on
Use BIOS settings
Check password
Bypass
Acer BIOS logo
OEM BIOS logo
2x CPU
3x
4x
5x
2.5x
3.5x
Buzzer
Speaker
A
Achitec Corp
www.achitec.com.tw
Achme Computer
www.achme.com
486 AL4
PCI/VLB
Jumper
JC1,4,6
7,8,13
JK1,2
JS1,2
JV1-3
JP4,12
JP6
JP20
Position
JC1
2-3
2-3
1-2,3-4
1-2,3-4
1-2,3-4
JK1
1,2
1,3
2
JS1
1-2
2-3
2-3
JV1
2-3
2-3
JP4
In
In
In
In
In
JC4
2-3
3-4
2-3
3-4
1-2,3-4
JK2
1,2,3
1,2,3
4.5.6
JS2
2-3
1-2
2-3
JV2
1-2
2-3
JP12
1-2
2-3
Out
2-3
Out
JC6
2-3
2-3
2-3
2-3
2-4
JC7
2-3
2-3
2-3
2-3
2-4
JC8
2-3
2-3
2-3
2-3
1-2
JV3
1-2
1-2
1-2
2-3
1-2
2-3
None
Acme
Maybe same as Achme
ACORP International
www.acorp.com.tw
Award BIOS ID (00)
The last two numbers of the BIOS part number.
Code
0C
9C
9C
Motherboard
PT-51VL
586VX/5VIA5S
5TX32
Code
AC
BC
Motherboard
SD-P5TD
5VX32 vB/5TX52 vE
JC13
1-2
1-2
1-2
1-2
2-3
Function
CPU Type
Intel/AMD SX
Intel SX SL
Intel/AMD DX/DX2
Intel DX/DX2 SL
Curix M7 (+JC11 3)
CPU Speed
25 MHz
33 MHz
40 MHz
Cache Size
128K (32Kx8)
256K ((32Kx8)
256K (64Kx8)
VL Bus
<=33 MHz
> 33 MHz
PCI IDE
Rising Edge trigger
Falling edge trigger
Low Active lever trigger
Low Active level trigger
No PCI add-in card
Use above with BIOS settings
Non-NCR 53C810 PCI SCSI
NCR 53C810
12v Flash Memory
5v Flash Memory
Normal
49
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The PC Engineer’s Reference Book – Vol 2: Motherboards
586VX
San-Li SL-586V?
5VX32 ver B
San-Li SL-586V+?
Acouire, Inc
Acro Computer Corp
Acrosser Technology Co
www.acrosser.com
Activei Systems Inc
Pride Corp
www.pridecorp.com www.activei.com
Acusharp
Award BIOS ID
The last two numbers of the BIOS part number.
Code
HC-00
Motherboard
Excalibur TX 1569
Code
Motherboard
Excalibur TX 1569
Same as Shuttle HOT 569
Adcom
ADI
Award BIOS ID
The last two numbers of the BIOS part number.
Code
8C-00
Motherboard
4DXP-UC5
Code
Motherboard
Adlink Technology Ltd
www.adlink.com.tw
Advanced Integration Research (AIR)
See AIR. Out of business, anyway
Advanced Jenn Bao Enterprises
www.ajb.com.tw
A
Advanced Logic Research
See ALR
Advanced Micro Products (AMP)
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
SD-380H
Code
Motherboard
SD-380H
Freetech?
Advantech
www.advantech.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC-00
Motherboard
PCM 5862
Code
Motherboard
AEG Olympia
Olystar 20F
SW1
Jumper
1
2
3
4
Position
On*
Off
On
Off
On
Function
Enable COM1
Reserved
Enable RTC 1
Enable RTC 0
Disable IRQ2
Enable IRQ2
SW2
Jumper
S1
S2
S3-4
S5
S6
S7-8
Position
Off*
On
Off
On
Memory
256K
512K
640K
Do not use
Off
On
Floppy
Function
Enable floppies
Disable floppies
8087 installed
8087 not installed
S3
S4
Off
Off
Bank 1
On
Off
Banks 1,2
Off
On
Banks 1,2,3
On
On
768K model has 3&4 set off and On. Also set SW3-5 off and SW3-6 On.
Reserved
Enable Onboard display
Disable Onboard display
S7
S8
51
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
Single
Dual
Function
On
Off
On
On
SW3
Switch
S1-4
S5
S6
S7
S8
Position
Bank Address
C0000-C3FFF
C4000-C7FFF
C8000-CBFFF
CC000-CFFFF
D0000-D3FFF
D4000-D7FFF
D8000-DBFFF
DC000-DFFFF
E0000-E3FFF
E4000-E7FFF
E8000-EBFFF
EC000-EFFFF
On
Off
On
Off*
On
Off
On
Off
Function
S1
S2
On
On
On
On
On
Off
Off
Off
On
On
Off
On
On
Off
Off
Off
On
On
Off
On
On
Off
Off
Off
Reserved
768K RAM
RAM Bank enable
RAM Bank disable
64K ROM
40K ROM
10 MHz
4.77 MHz
SW4
Jumper
S1
S2
JP1
Position
A In
B In
Function
Mono display
Colour display
Disable Onboard display
Enable Onboard display
Olystar 40F
Jumper
JP4,5
JP6,7
JP8,9
JP10,11
JP12,16
Position
JP4
2-3
1-2
JP6
1-2
2-3
1-2
JP8
2-3
2-3
1-2
2-3
JP10
2-3
2-3
1-2
JP12
1-2
1-2
JP5
1-2
JP7
1-2
2-3
JP9
1-2
JP11
1-2
JP16
1-2
Function
Maths copro
8087 not there
8087 present
MGA mode
MGA
CGA
CGA emulate
COM1/2&HD
Disable COM1
Disable COM2
Disable HD
EPROM
27128
27256
27512
HD
Enable
Disable
S3
On
On
On
On
Off
Off
Off
Off
On
On
On
On
S4
On
On
On
On
On
On
On
On
Off
Off
Off
Off
A
Olystar 60F/H
Jumper
JA
JC,D
JB,C,D
Position
A
JC
A
B
JB
B
A
Function
VGA Enabled (B Disabled)
JD
B
B
JC
B
A
COM1 disable
COM2 disable
JD
A
A
Disk controller disable
Disk controller enable
Olystar 60 H16
Jumper
JP1
JP2
JP7,8,10
JA1
Position
Off
On
1-2
2-3
JP7
1-2
2-3
5-6
1-2*
1-2
JP8
1-2
2-3
JP10
1-2
2-3
5-6*
4-5
Function
System locked
System unlocked
Coprocessor asynchronous mode
Coprocessor synchronous mode
BIOS Type
16-bit
8-bit
32K cache
64K cache
128K cache
Olystar 70 H20
VGA Board
Jumper
J1
J2
J3
Position
In
Out
In
Out
In
Function
VGA auto setting by BIOS
VGA disabled
VGA connect IRQ9
VGA disconnect IRQ9
VGA BIOS enabled
Position
A
B
20
16
20
16
Function
Password check enabled
Password check disabled
20 MHz
16 MHz
DRAM CAS precharge 1/2T
DRAM CAS precharge T
Main Board
Jumper
J3
J4
J5
Olystar 70S
Jumper
J2
J4
J7
J8
J9
J14
J15
J20
Position
In
In
In
In
Out
In
Out
In
Out
Function
VGA enabled
VGA BIOS enabled
Password enabled
IRQ9 to Onboard VGA
IRQ9 to expansion card
Oscillator
External
System BIOS only
VGA and System BIOS combined
CPU speed
MEMCS16
53
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Olystar 80T33
SW1
Switch
S1-4
S5-8
Function
EPROM
27128
27256
27512
I/O recovery delay
0
1
2
3
4
5
6
8*
9
10
11
12
13
14
15
Position
S1
On
On*
Off
S5
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
On
On
On
On
S2
Off
Off*
On
S6
Off
Off
Off
Off
On
On
On
Off
Off
Off
Off
On
On
On
On
S3
On
Off*
Off
S7
Off
Off
On
On
On
Off
On
Off
Off
On
On
Off
Off
On
On
S4
Off
On
On
S8
Off
On
Off
On
On
On
Off
Off
On
Off
On
Off
On
Off
On
SW2
Switch
S1
S2
S3
S4
S5-7
S8
S9
S10
JP6-8
JP12
JP13-16
Position
On*
Off
Off*
On
Off*
On
Off*
On
S5
Off*
On
Off*
On
Off*
On
Off*
On
JP6
1-2
2-3*
1-2*
2-3
RAM
2 Mb
4 Mb
6 Mb
4 Mb
8 Mb
S6
Off*
On
S7
On*
Off
JP7
1-2
2-3*
JP8
1-2
2-3*
Bank
A
A&B
A
B
A
A&B
Function
25-pin=COM1, 9-pin=COM2
9-pin=COM1, 25-pin=COM2
Enable COM1
Disable COM1
Enable COM2
Disable COM2
Enable Printer Port
Disable Printer Port
Printer Port
LPT1
LPT2
RAM BIOS selected
ROM BIOS selected
Primary display Mono or extended
Primary display CGA
DRAM Bank B enabled
DRAM Bank B disabled
Maths Copro
There
Not there
Remap 256K to FA0000-FDFFFF
Do not remap or permit RAM cacheing of F00000-FFFFFF
Modules
JP13
JP14
JP15
JP16
512 x 9
2-3*
2-3*
1-2*
1-2*
512 x 9
2-3
2-3
1-2
1-2
512 x 9
1-2
1-2
1-2
1-2
1M x 9
1M x 9
1-2
1-2
2-3
2-3
1M x 9
1-2
1-2
2-3
2-3
AIR
Advanced Integration Research - out of business
A
Award BIOS ID
The last two numbers of the BIOS part number.
Code
FC
Motherboard
54CPI
Code
Motherboard
486ED
EISA
Jumper
J1-3
Position
J1
Off
On
On
J2
Off
1-2
2-3
Function
CPU Type
486SX (P23)
486DX and 486DX2 (P24)
487SX , P23T, OverDrive
J3
2-3
1-2
1-2
Cache Size
Jumper
JC1
JC2
JC3
JC4
JC5
JC6
JC7
JP9
64K
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
128K
2-3
2-3
1-2
1-2
1-2
1-2
2-3
1-2
256K
2-3
2-3
2-3
1-2
1-2
2-3
2-3
4-5
512K
2-3
2-3
2-3
2-3
2-3
2-3
2-3
1-2
CPU Clock Frequency
Jumper
JO1
JO2
JO3
JO4
JL2
20MHz
Off
On
On
On
Off
25MHz
On
Off
On
On
Off
33MHz
On
On
Off
On
Off
J2
Open
1-2
2-3
JO2
Short
Short
Open
Open
J3
2-3
1-2*
1-2
JL2
Open
Open
Short
Short
JC5
1-2
1-2
2-3
JP9
1-2
4-5
1-2
50MHz
Off
Off
Off
Off
On
486EI v1.0
EISA/VESA
Jumper
J1-3
JO1,2
JL2
JP12
JC4,5
JP9
Position
J1
Open
Short
Short
JO1
Short
Open
Short
Open
1-3,2-4
3-5,4-6
JC4
2-3
1-2
2-3
Function
CPU Type
486SX
DX, DX2, DX4
487SX, P23T, Overdrive
CPU External Clock
25 MHz
33 MHz
40 MHz
50 MHz
5v CPU
3.3v CPU
Cache Size
128K
256K*
512K
55
56
The PC Engineer’s Reference Book – Vol 2: Motherboards
486EI v1.2
EISA/VESA
Jumper
J1-3
J12
JO1,2
JL2
J12
JC4,5,9
Position
J1
Open
Short
Short
Short
JO1
Short
Open
Short
Open
1-3,2-4
3-5,4-6
JC4
1-2
2-3
J2
Open
2-3
1-2
1-2
JO2
Short
Short
Open
Open
J3
2-3
1-2
1-2
1-2
JL2
Open
Open
Short
Short
JC5
1-2
2-3
JC9
4-5
1-2
Function
CPU Type
486SX
487SX
DX, DX2
DX4
CPU External Clock
25 MHz
33 MHz
40 MHz
50 MHz
5v CPU
3.3v CPU
Cache Size
256K*
512K
486MI v1.0
Jumper
JP1-2
ID2
JP22-24
JP29
JP30
Position
JP1
1-2,3-4
2-3
Open
1-2
2-3*
JP22
2-3
1-2
2-3
JP22
2-3
1-2
2-3
1-2*
2-3
1-2
2-3
Function
CPU Type
DX, DX2
487SX, ODPSX
486SX
0 wait state write transfer
1 wait state write transfer
IDE recovery time at 33 MHz or less
9T, Low Speed (Default)
7T, Middle Speed
5T, High Speed
IDE recovery time at 40 MHz or more
13T, Low Speed
11T, Middle Speed
9T, High Speed
Enable onboard VL IDE
Disable
LPT IRQ7
LPT IRQ5
JP2
1-2,3-4
2-3
JP23
1-2
2-3
2-3
JP23
2-3
1-2
1-2
JP24
2-3
2-3
2-3
JP24
1-2
2-3
2-3
CPU External Clock
Speed
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
JP5
Short
Open
Open
Open
Open
JP6
Open
Short
Short
Open
Open
JP7
Open
Short
Open
Short
Open
ID3
1-2
1-2
1-2
2-3
2-3
JP26
2-3
2-3
2-3
1-2
1-2
Cache
Size
64K
128K
256K
256K
JP10
1-2
2-3
2-3
2-3
JP11
1-2
1-2
2-3
2-3
JP12
1-2
1-2
1-2
2-3
JP13
2-3
1-2
2-3
1-2
JP14
1-2
1-2
2-3
1-2
JP15
1-2
2-3
2-3
2-3
JP27
2-3
2-3
2-3
1-2
1-2
JP28
1-2
1-2
1-2
2-3
2-3
A
486MI v2.21
Jumper
JP1-2
JP38
JP3
JP5-7
ID3
JP8
JP9
JP16
JP17
JP20
JP22
JP23,24
JP25-27
JP28
JP29
JP30
JP30
JP31
JP37
ID2
W1
Cache Size
128K
256K*
512K
Position
JP1
1-2
1-2
Open
2-3
Open
2-3
1-2
JP5
Short
Short
Short
Short
1-2
2-3
1-2
Open
Short
1-2
2-3
1-2
2-3
1-2
2-3
JP23
1-2
2-3
1-2
2-3
JP25
Open
2-3
1-2
JP2
1-2,3-4
1-2,3-4
2-3
1-2,2-3
JP38
1-2
Open
1-2
1-2
JP6
Short
Short
Open
Open
JP7
Short
Open
Short
Open
JP24
1-2
1-2
2-3
2-3
JP26
Open
2-3
1-2
JP27
2-3
1-2
1-2
ID3
1-2
1-2
2-3
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
1-3,2-4
3-5,4-6
JP10
2-3
2-3
2-3
JP11
1-2
2-3
2-3
JP12
1-2
1-2
2-3
JP13
1-2
2-3
1-2
Function
CPU Type
DX, DX2
DX4
486SX
487SX, ODPSX,P24T
DX4 3x
DX4 2.5x
DX4 2x
CPU Frequency
25 MHz
33 MHz*
40 MHz
50 MHz
Enable Fast Gate A20
Disable
SIM2 not accept 512Kx36, 2Mx36, 8Mx36
EGA, VGA or mono display
CGA
Normal
Enable Flash Programming
Normal
Clear CMOS
Enable onboard IDE
Disable
IDE Speed
0
2
4
6
LPT ECP mode
Disable
DMA1
DMA3
Reserved
Reserved
LPT IRQ7
LPT IRQ5
LPT IRQ7
LPT IRQ5
IRQ4 wakes up system
IRQ3 wakes up system
Reserved
1 VL bus wait state
0 VL bus wait state
5v CPU
3.3v CPU
JP14
1-2
2-3
1-2
JP15
2-3
2-3
2-3
57
58
The PC Engineer’s Reference Book – Vol 2: Motherboards
486MIS
Jumper
JP1-2
JP18
JP3-5
ID3
JP16
JP17
JP22
JP28
JP29,30
JP32
W1
I1,2
W1
B1,2
W1E
ID2
Cache Size
64KB
128KB
256KB
512KB
Position
JP1
1-2
2-3
Open
Open
JP3
Open
Short
Short
Open
Open
Open
Short
Open
1-2
2-3
1-2
2-3
JP29
Short
Open
Short
Open
Open
Short
I1
I2
B1
In
In
Out
In
Out
1-2
2-3
JP7
1-2
1-2
2-3
2-3
JP2
1-2,3-4
1-2,3-4
2-3
2-3
JP4
Short
Open
Short
Open
Short
JP18
1-2
1-2
1-2
2-3
JP5
Short
Short
Open
Short
Open
ID3
1-2
1-2
1-2
2-3
2-3
JP30
Short
Short
Open
Open
B2
In
Out
Out
JP8
1-2
1-2
1-2
2-3
JP9
1-2
2-3
2-3
2-3
JP10
1-2
2-3
2-3
2-3
JP11
1-2
2-3
2-3
2-3
Function
CPU Type
DX, DX2
487SX, ODPSX
486SX
Cyrix 486 DLC
CPU Frequency
20 MHz
25 MHz
33 MHz*
40 MHz
50 MHz
EGA, VGA or mono display
CGA
Enable onboard VL IDE
LPT IRQ7
LPT IRQ5
Normal
Enable Flash Programming
IDE recovery time
300ns
240ns
180ns
120ns
Normal
BIOS does infinite loop and clears password – disable SCSI with I2 and E on W1.
IRQ10
IRQ11
SCSI BIOS segment location
DC00
D8000
Disable
SCSI works
SCSI doesn't work
0 wait state write transfer
1 wait state write transfer
JP12
1-2
1-2
2-3
1-2
JP13
1-2
1-2
2-3
2-3
JP14
1-2
1-2
1-2
2-3
486PH
PCI/VESA
Jumper
JP1
JP2
JP3
JP14
CPU Type
Intel 486SX
Position
1-2
2-3
Open
Short
1-2
1-2
Function
Normal
Clear CMOS (CMOS RAM is in ODIN OEC12C887A)
VGA, EGA or mono display
CGA
Reserved
Reserved
JP10
Short
JP16
Open
JP23
Open
JP24
2-3
JP25
1-2
JP15
2-3
1-2
2-3
1-2
A
CPU Type
JP10
Intel 486DX, DX2, DX4 (Default)
Short
AMD 486DX, DX4*
Short
AMD 486DX2*
Short
Cyrix 3.3v 486DX, DX2
Short
Cyrix 5v 486DX, DX2
Short
Chipset auto detects AMD 3.3-Volt and 5-Volt CPUs
Clock Speed
33 MHz
25MHz
JP6
1-2
2-3
JP19
Open
Short
JP20
Short
Open
JP16
Open
Open
Open
Short
Open
JP23
Open
Short
Open
Short
Short
JP24
1-2
1-2
1-2
1-2
1-2
JP25
1-2
2-3
2-3
2-3
2-3
JP21
Short
Open
Cache Size
JP8
JP9
JP11
JP12
128KB
Short
Open
Open
Open
256KB
Open
Short
Short
Open
256KB*
Short
Open
Short
Open
512KB
Short
Open
Short
Short
For 256K with 64Kx8 SRAM, in the CMOS Chipset Setup menu, set L2 Cache Configuration to N-Leaved.
486PI
Jumper
JP1
JP2
JP3
JP5
JP4,6-7
JP8-12
JP13
JP14
JP17
JP18
JP19-22
JP23
JP24
JP25
JP26
JP27
JP28
JP29
JP30
Green
Position
1-2
2-3
1-2
1-2
2-3
Open
Short
JP4
Open
1-2
2-3
JP8
Short
Open
Short
1-2
1-2
Short
Open
JP19
Open
Short
2-3
Open
1-2
2-3
Short
Open
1-2
Open
Open
Open
Short
JP6
Open
1-2
2-3
JP9
Open
Short
Open
JP7
1-2
2-3
2-3
JP10
Open
Short
Open
JP11
Open
Short
Short
JP20
Short
Open
JP21
Short
Open
JP22
1-2
2-3
JP12
Open
Open
Short
Function
Normal operation
Clear CMOS
Reserved
LPT IRQ7
LPT IRQ5
VGA, EGA or Mono
CGA
ECP mode
Enable 4 floppies, No ECP
DMA3
DMA1
Cache size
128K
256K
512K
Reserved
Reserved
Reserved
Reserved
CPU Speed
33 MHz
25 MHz
Reserved
Reserved
486DX4, DX2, DX, P24D, P24T, 487SX
486SX
Reserved
Reserved
Reserved
Reserved
Reserved
Normal – power saving triggered by system timer
Force system into power saving
59
60
The PC Engineer’s Reference Book – Vol 2: Motherboards
486SH
Jumper
JP1-3
20-21
JP4
JP7
JP10
JP13
JP11-12
14,5
JP15-16
18-19
Position
JP1
1-2
1-2
2-3
2-3
1-2
Open
Short
1-2
2-3
Short
Open
JP11
Open
Short
Short
Open
Open
JP15
1-2
1-2
2-3
2-3
JP2
2-3
1-2
2-3
JP3
1-2
2-3
2-3
JP20
1-2
1-2
2-3
JP12
Open
Short
Open
Short
Open
JP16
1-2
2-3
Open
Open
JP14
Short
Open
Open
Open
Open
JP18
Short
Short
Open
Open
JP5
1-2
1-2
1-2
2-3
2-3
JP19
Short
Short
Short
Open
JP2
1-2
2-3
2-3
JP3
1-2,3-4
2-3,4-5
1-2,3-4
JP4
1-2
1-2
2-3
JP6
On
On
Off
Off
JP9
On
On
Off
On
JP7
Off
On
Off
On
JP11
3-4
3-4
Off
2-3
JP29
1-2
1-2
2-3
2-3
JP36
1-2
2-3
1-2
1-2
JP2
1-2
2-3
2-3
2-3
JP3
1-2,3-4
2-3,4-5
1-2,3-4
1-2,3-4
JP4
1-2
1-2
1-2
2-3
JP21
1-2
2-3
2-3
Function
Cache size
128K
256K
512K
1 wait state write transfer
0 wait state write transfer
VGA, EGA or monochrome
CGA
Normal
Clear CMOS
CPU clock 8 MHz when power saving
CPU full seed
CPU Speed
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
CPU Type
486DX,DX2
487SX, ODP486SX
486SX
QFP 486SX
486SH v3.1
VL Bus
Jumper
JP1-4
J3
JP5-7,29
JP8-9
11,36
JP16
JP17
Position
JP1
1-2
2-3
1-2
1-2
2-3
JP5
On
Off
On
Off
JP8
1-2
1-2
2-3
1-2
1-2
2-3
Off
On
Function
Cache size
128K
256K
512K
Turbo disabled
Enabled
CPU Speed
25 MHz
33 MHz
40 MHz
50 MHz
CPU Type
486DX,DX2
486DX4 3.3v
486SX
487SX,ODP 486SX,P24T
Normal
Clear CMOS
VGA, EGA or Mono
CGA
486SH v3.1
Jumper
JP1-4
33
Position
JP1
1-2
2-3
1-2
1-2
JP33
2-3
2-3
1-2
2-3
Function
Cache size
128K
256K
256K
512K
A
Jumper
JP5-7,29
JP8-9
11,36
JP16
JP17
Position
JP5
On
Off
On
Off
JP8
1-2
1-2
2-3
1-2
1-2
2-3
Off
On
JP6
On
On
Off
Off
JP9
On
On
Off
On
JP7
Off
On
Off
On
JP11
3-4
3-4
Off
2-3
JP29
1-2
1-2
2-3
2-3
JP36
1-3,2-4
3-5,4-6
1-3,2-4
1-3,2-4
JP2
1-2
2-3
2-3
2-3
JP6
On
On
Off
Off
JP9
On
On
Off
On
On
JP3
1-2,3-4
2-3,4-5
1-2,3-4
1-2,3-4
JP7
Off
On
Off
On
JP11
3-4
3-4
Off
2-3
3-4
JP4
1-2
1-2
1-2
2-3
JP29
1-2
1-2
2-3
2-3
JP36
1-3,2-4
3-5,4-6
1-3,2-4
1-3,2-4
3-5,4-6
Function
CPU Speed
25 MHz
33 MHz
40 MHz
50 MHz
CPU Type
486DX,DX2
486DX4 3.3v
486SX
487SX,ODP 486SX,P24T
Normal
Clear CMOS
VGA, EGA or Mono
CGA
486SH v3.1a
Jumper
JP1-4
33
JP5-7,29
JP8-9
11,36
JP16
JP17
Position
JP1
1-2
2-3
1-2
1-2
JP5
On
Off
On
Off
JP8
1-2
1-2
2-3
1-2
1-2
1-2
2-3
Off
On
JP33
2-3
2-3
1-2
2-3
JP30
Off
Off
Off
Off
On
Function
Cache size
128K
256K
256K
512K
CPU Speed
25 MHz
33 MHz
40 MHz
50 MHz
CPU Type
486DX,DX2
AMD DX2, 486DX4 3.3v
486SX
487SX,ODP 486SX,P24T
AMD 486DX4 3.3V
Normal
Clear CMOS
VGA, EGA or Mono
CGA
486VP (D)
Jumper
JP2
JP5
JP6
JP9
JP10A, B, C, D, J
JP11
JP12
JP20-21
62
JP29
Position
1-2
2-3
Off
On
Off
2-3
Off
2-3
1-2
2-3
JP20
1-2
2-3
2-3
2-3
JP21
1-2
2-3
Off
JP62
Off
Off
2-3
Function
Normal
Clear CMOS
VGA, EGA or Mono
CGA
Reserved
Reserved
Reserved
Reserved
Disable flash programming
Enable
Cache size
256K
512K
1Mb – set CMOS
Reserved
61
62
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP30
JP31
JP32
JP34
JP35
JP36
JP38
JP40
JP41
JP42
JP50
JP51
JP53
JP54
JP55
JP56
JP57
JP58
JP59
JP60
JP61
JP63
JP64
JP65
JP66
JP68
JP70
JP71
JP80
JP81
Position
2-3
2-3
2-3
On
1-2
1-2
1-2, 4-5, 7-8, 11-12
Off
1-2
Off
Off
Off
1-2,3-4
1-2,3-4
Off
Off
1-2
2-3
1-2
1-2
Off
Off
1-2
1-2
1-2
1-2
2-3
Off
1-3,2-4
3-5,4-6
On
Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
5v CPU
3.3v CPU
Reserved
External Clock Speed
JP26
JP27
25 MHz
ON
1-2*
33 MHz
ON
2-3
40 MHz
OFF
1-2
50 MHz
OFF
2-3
For DX4, set JP27 off for 25MHz, JP28 off for 33MHz
CPU
486DX4, DX2, DX
486SX
487SX, P24T
JP19
OFF
OFF
OFF
SIM5-SIM8
BANK0
(1Mx9, 4Mx9)
NONE
SIM1-SIM4
BANK1
(1Mx9, 4Mx9)
NONE
BANK0
(1Mx9, 4Mx9)
NONE
JP69
OFF
OFF
OFF
JP28
2-3
1-2*
2-3
1-2
JP15
1-2
1-2
1-2
JP7
ON
OFF
OFF
OFF
JP37
2-3
OFF
1-2
JP33
OFF
OFF
ON
ON
JP52
OFF
OFF
OFF
JP8
1-2
1-2
2-3
2-3
JP8A
2-3
2-3
1-2
1-2
JP61
2-3
2-3
1-2
1-2
JP13
OFF
OFF
ON
ON
JP18
1-2,3-4
2-3
1-2,3-4
SIM9
NONE
SIM10
NONE
JP22
1-2
JP23
1-2
JP24
2-3
JP25
2-3
BANK0
(1Mx36, 4Mx36)
NONE
BANK1
(1Mx36, 4Mx36)
BANK1
(1Mx36, 4Mx36)
2-3
2-3
1-2
1-2
1-2
2-3
1-2
2-3
A
SLOTS
PCI0, PCI1, PCI2
IRQ9
IRQ10
IRQ11
IRQ12
IRQ15
N/A
SLOT PCI3
(IDE Controller)
N/A
N/A
N/A
N/A
N/A
IRQ14
JP10F
JP10G
JP10H
JP10I
JP10J
JP10K
1-2
OFF
OFF
OFF
OFF
OFF
OFF
1-2
OFF
OFF
OFF
OFF
OFF
OFF
1-2
OFF
OFF
OFF
OFF
OFF
OFF
1-2
OFF
OFF
OFF
OFF
OFF
OFF
1-2
OFF
OFF
OFF
OFF
OFF
OFF
2-4
54CDP v1.0
Dual Pentium EISA/PCI
Jumper
Position
JS1,4
JS1
Open
2-3
JS3
Open
Short
JS5,7,8
JS5
Open
Short
Short
JS6
2-3
1-2
JS9
1-2
2-3
JS11
Short
Open
Short
JS13
Short
Open
JS15
1-2
2-3
JS16
Short
Open
JS18
Open
Short
JS4
Open
Short
JS7
Open
1-2
2-3
JS8
Open
1-2
2-3
Function
Floppy
Normal (2)
Enhanced (4)
Normal operation
Clear CMOS
LPT ECP Mode
Normal
DMA1
DMA3
LPT IRQ7
LPT IRQ5
Flash BIOS programming
Normal
8/16-bit Fast Wide SCSI
8-bit Fast SCSI
16-bit Fast Wide SCSI
Single CPU
Dual CPU
256K cache
512K cache
VGA, EGA or Mono
CGA
90 MHz CPU
100MHz
54CDP v2.21
Jumper
JS1,3
JS2
JS4,6,7
JS5
JS9
JS10
JS11,20
21,23
Position
JS1
Open
2-3
Short
JS4
Open
Short
Short
1-2
2-3
1-2
2-3
Open
Short
Short
JS11
Open
JS3
Open
Short
JS6
Open
1-2
2-3
JS7
Open
1-2
2-3
JS20
Open
JS21
Open
JS23
Open
Function
Floppy
Normal (2)
Enhanced (4)
Clear CMOS
LPT ECP Mode
Normal
DMA1
DMA3
LPT IRQ7
LPT IRQ5
Flash BIOS programming
Normal
8-bit Ultra Fast SCSI
8/16-bit Ultra fast Wide SCSI
16-bit Ultra fast Wide SCSI
Clock frequency
75 MHz
63
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
Open
Open
Short
Short
Short
Short
Short
Open
1-2
2-3
1-2
2-3
1-2
2-3
JS18
1-2
2-3
1-3,2-4
3-5,4-6
JS12
JS13
JS15
JS17
JS18,19
JS24
Open
Short
Open
Short
Open
Short
Short
Short
Short
Short
Short
Short
Open
Open
Open
Open
Short
Short
JS19
1-2
2-3
Function
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
167 MHz
Single CPU
Dual CPU
256K cache
512K cache
Flash programming mode
Normal
VRE CPU (3.53v)
STD & VR CPU (3.37v)
Cache
3.3v cache
5/3.3v cache
PCI SCSI sharing with PCI slot 4
PCI SCSI sharing with PCI slot 1
54CEP v1.0
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Problems
Jumper
JO1
JP5
JP6
JP8
JP10
JP16
Description
Pentium
90/100
Mercury
AMI
4 EISA/5 PCI
128 Mb
256/512 L2
2S, PS/2, 1P
Position
Open
Short
Open
Short
Short
Open
Short
Open
Short
2-3
1-2
1-2
2-3
Notes
All support busmastering
72-pin SIMMs
FW SCSI Adaptec 7870
Quantum 1 GB drives may not communicate at full speed with the 7870 – set communication to 8 MB/sec.
Function
90 MHz CPU
100MHz
8-bit Fast SCSI
8/16-bit Fast Wide SCSI
16-bit Fast Wide SCSI
VGA, EGA or Mono display
CGA
Normal
Clear CMOS
LPT IRQ7
LPT IRQ5
256K cache
512K cache
54CEP v1.2
Pentium EISA/PCI
Jumper
JO1
JP5
JP6
JP8
Position
Open
Short
Short
Open
Short
Open
Function
90 MHz CPU
100MHz
8/16-bit Fast Wide SCSI
Colour Display
Mono
Normal
A
Jumper
JP10
JP16
JP17
JP32,33
JP34-36
Position
Short
2-3
1-2
1-2
2-3
1-2
2-3
JP32
Open
Short
JP34
Open
1-2
2-3
JP33
Open
2-3
JP35
Open
1-2
2-3
JP36
Open
Short
Short
Function
Clear CMOS
LPT IRQ7
LPT IRQ5
256K cache
512K cache
Flash programming mode
Normal
Floppy
Normal (2)
Enhanced (4)
ECP Mode
Normal
DMA1
DMA3
54CSH
Pentium ISA/PCI
Jumper
JS2
JS3
JS4
JS7-9
JS10
JS11
JS12
JS13,14
Position
Open
Short
1-2
2-3
Open
Short
JS7
Short
Open
Open
2-3
1-2
1-2
JS13
1-2
1-2
2-3
JS8
Open
Short
Short
JS9
Open
Open
Short
JS14
1-2
2-3
2-3
SIMMs in SIM1, SIM2
256Kx36, 1Mx36, 4Mx36, 16Mx36
256Kx36, 1Mx36, 4Mx36, 16Mx36
512Kx36, 2Mx36, 8Mx36
512Kx36, 2Mx36, 8Mx36
512Kx36, 2Mx36, 8Mx36
Function
VGA, EGA or Mono
CGA
Normal
Flash BIOS programming
Normal
Clear CMOS
CPU Clock
75 MHz
90 MHz
100 MHz
Reserved
Reserved
Reserved
Cache size
256K
512K
1 Mb
SIMMs in SIM3, SIM4
None
256Kx36, 1Mx36, 4Mx36, 16Mx36
None
256Kx36, 1Mx36, 4Mx36, 16Mx36
512Kx36, 2Mx36, 8Mx36
54CMI v1.1
Jumper
JO1-3
JP4,5
JP6
Position
JO1
Open
Open
Short
JP4
Open
Open
Short
2-3
JO2
Open
Short
Short
JP5
Open
Short
Short
JO3
Short
Open
Open
Function
CPU Frequency
75 MHz
90 MHz
100MHz
Cache size
256K
512K
1 Mb
Disable Flash programming
JS5
2-3*
1-2
2-3
2-3
2-3
65
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP14
JP15
JP29-31
JP32
JP35
Position
1-2
2-3
1-2
1
2
3
JP29
Open
Short
Short
1-2
2-3
Open
Short
JP30
Open
1-2
2-3
JP31
Open
1-2
2-3
Function
Enable
Normal
Clear CMOS
Controls VSYNC. Connect to pin 12 of VGA Feature connector.
Controls HSYNC. Connect to pin 11 of VGA Feature connector.
Enable/disable video signals. Connect to pin 18 of Feature connector.
4 floppies/ECP
Enable/No
No/DMA3
No/DMA1
LPT IRQ7
LPT IRQ5
Enable onboard IDE
Disable
54CPI
Jumper
JS1
JS2,3
JS4
JS5
JS6
JS7
JS8
JS9-12
JS13-14
20-21
JS15-17
JS18
JS19
JS22
JS23
JS24
JS25
Position
1-2
2-3
JS2
Open
2-3
1-2
Open
1-2
1-2
Open
Short
1-2
2-3
JS9
1-2
2-3
1-2
2-3
1-2
JS13
Short
Open
JS15
1-2
2-3
Open
1-2
Short
Short
Short
Short
JS3
Open
2-3
1-2
JS10
2-3
1-2
1-2
1-2
1-2
JS14
Short
Open
JS16
1-2
2-3
JS11
1-2
1-2
1-2
2-3
2-3
JS20
Open
Short
JS17
1-2
2-3
JS7
Open
1-2
2-3
JS6
JS8
Open
1-2
2-3
JS12
2-3
2-3
1-2
2-3
1-2
JS21
Open
Short
Function
LPT IRQ7
LPT IRQ5
ECP Mode
Disable
DMA1
DMA3
Reserved
Reserved
Reserved
VGA, EGA or Mono display
CGA
Normal
Clear CMOS
CPU Frequency
75 MHz
90 MHz
100MHz
120 MHz
133 MHz
SRAM
Mixed mode
3.3v
Cache size
256K
512K
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
54CPI v2.10
Jumper
JS1,7-8
JS2,6
Position
JS1
Open
Short
Short
JS2
Function
ECP Mode
Normal
DMA3
DMA1
Floppy Mode
A
Jumper
JS3-4
JS5
JS9-11
JS25,32
JS12-13
23-24
JS15
JS16
19-21
JS17
JS18
JS22
JS26-30
JS31
Position
Open
Short
JS3
1-2
2-3
1-2
2-3
JS9
1-2
1-2
2-3
1-2
2-3
1-2
2-3
JS12
Short
Open
Open
Short
JS16
1-2
2-3
2-3
1-2
2-3
2-3
Open
Short
2-3
1-2
Open
2-3
JS4
1-2
2-3
JS10
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JS13
Short
Open
JS11
1-2
2-3
2-3
2-3
2-3
2-3
2-3
JS23
Open
Short
JS25
1-2
1-2
1-2
1-2
1-2
2-3
2-3
JS24
Open
Short
JS19
2-3
1-2
2-3
JS20
1-2
1-2
2-3
JS21
1-2
2-3
2-3
JS32
1-2
1-2
1-2
2-3
2-3
2-3
2-3
Function
Normal
Enhanced
COM2 mode
Standard
IR
LPT IRQ7
LPT IRQ5
CPU Frequency
75 MHz
90 MHz
100MHz
120 MHz
133 MHz
150 MHz
166 MHz
SRAM
Mixed mode
3.3v
VGA, EGA or mono display
CGA
Cache size
256K/async
512K/async
Module
12v flash programming
5v flash programming
Clear CMOS
Disable CPU pipeline mode
Reserved
STD or VR CPU voltage
VRE
54CPI v3
Jumper
JS5
J03
JS12-13
23-24
JS15
JS17
JS18
JS31
Position
1-2
2-3
Short
Open
JS12
Short
Open
Open
Short
1-2
2-3
1-2
2-3
2-3
1-2
JS13
Short
Open
JS23
Open
Short
JS24
Open
Short
54TDP
Dual Pentium
Jumper
JP10-11
JS14
Position
JP10
Open
JP11
Open
JS14
2-3
Function
CPU Type
P55
Function
LPT IRQ7
LPT IRQ5
66 MHz CPU speed
60 MHz CPU speed
SRAM
Mixed mode
3.3v
VGA, EGA or mono display
CGA
12v flash programming
5v flash programming
Normal
Clear CMOS
STD or VR CPU voltage
VRE
67
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JS7
JS8-9
JS13
JS10
JS11
JS12
CLCMOS
CLPSWD
FLASH
MONO
Position
Short
1-2
2-3
JS8
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
1-2
2-3
1-2
1-2
2-3
1-2
2-3
1-2
2-3
Short
1-2
JS9
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JS13
Open
Open
Open
2-3
2-3
1-2,2-3
1-2,2-3
1-2
1-2
Function
P54
Single CPU
Dual CPU
CPU Frequency
75 MHz
90 MHz
100MHz
120 MHz
133 MHz
150 MHz
166 MHz
180 MHz
200 MHz
RAID support card not installed
RAID support card installed
16-bit SCSI device
8-bit SCSI device
Wide SCSI termination with low byte
Always
Clear CMOS
Normal
Clear Password
12v Flash EPROM
5v Flash EPROM
Colour Display
Mono
54TPI
Jumper
JS2
JS3
JS4,5
JS6-7
JS8
JS9-11
JS12-14
JS16
JS15
JS18
Position
2-3
1-2
1-2
2-3
JS4
1-2
2-3
JS6
2-3
1-2
1-2
2-3
JS9
2-3
1-2
1-2
JS12
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
2-3
JS5
1-2
2-3
JS7
1-2
2-3
JS10
Open
1-2
2-3
JS13
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JS11
Open
1-2
2-3
JS14
2-3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
JS16
Open
Open
Open
3-4
3-4
1-2,3-4
1-2,3-4
1-2
1-2
Function
Normal
Clear CMOS
Enable PS/2 mouse
Disable
COM2
Normal
IR
Floppy Mode
Normal (2)
Enhanced (4)
LPT IRQ7
LPT IRQ5
ECP Mode
Normal
DMA1
DMA3
CPU Frequency
75 MHz
90 MHz
100MHz
120 MHz
133 MHz
150 MHz
166 MHz
180 MHz
200 MHz
3.3v CPU
A
Jumper
Position
1-2
PSWD
1-2
2-3
1-2
2-3
1-2
2-3
Function
3.45v CPU
Fast 8-bit SCSI
Fast and Wide 16-bit SCSI
Clear Password
Normal
12v Flash EPROM (Intel)
5v Flash EPROM (SST)
Colour Display
Mono
Position
2-3
1-2
1-2
2-3
JS12
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
JS18
2-3
1-2
1-2
2-3
1-2
2-3
1-2
2-3
Function
Normal
Clear CMOS
Enable PS/2 mouse
Disable
CPU Speed
75 MHz
90 MHz
100MHz
120 MHz
133 MHz
150 MHz
166 MHz
180 MHz
200 MHz
Fast 8-bit CPU
Fast and Wide 16-bit SCSI
CPU Type
P55C (Inte)
P54C (Intel)/Cyrix/AMD
Clear Password
Normal
12v Flash EPROM (Intel)
5v Flash EPROM (SST)
Colour Display
Mono
FLASH
MONO
54TPI v5
Jumper
JS2
JS3
JS12-14
JS16
JS15
JS18-21
PSWD
FLASH
MONO
JS13
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JS14
2-3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
JS16
Open
Open
Open
3-4
3-4
1-2,3-4
1-2,3-4
1-2
1-2
JS19
2-3
1-2
JS20
2-3
1-2
JS21
2-3
1-2
586EP
Pentium EISA/PCI
Jumper
J03
JP5
JP6
JP8
JP10
JP12,16
Position
Short
Open
Open
Short
Short
Open
Short
Open
Short
1-2
2-3
JP12
1-2
2-3
JP16
1-2
2-3
Function
66 MHz CPU speed
60 MHz CPU speed
8-bit Fast SCSI
16-bit Fast wide SCSI
Both 8-bit/16-bit SCSI
VGA, EGA or Mono
CGA
Normal
Clear CMOS
LPT IRQ7
LPT IRQ5
Cache Size
256K
512K
69
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The PC Engineer’s Reference Book – Vol 2: Motherboards
586MI
Jumper
JO1-3
J05-7
JP19
JP13
JP14
JP15
JP18
JP21-23
JP30
JP32
Cache Size
64KB
128KB
256KB
512KB
Position
JO1
Open
Short
Open
JO5
Short
Open
Open
2-3
Open
Short
2-3
1-2
Short
Open
JP21
2-3
1-2
2-3
Open
1-2
2-3
JP1
1-2
2-3
1-2
2-3
JO2
Short
Short
Open
JO6
Open
Open
JO3
Open
Open
Short
JO7
Open
Open
JP22
2-3
2-3
1-2
JP23
2-3
2-3
2-3
JP2
1-2
2-3
1-2
2-3
JP3
1-2
2-3
1-2
2-3
JP4
Open
Open
Open
Short
P5TPI
Same as 54TPI.
P5TXA
Jumper
JP2
PWSELI
Voltage
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
2.8V
2.7V
2.6V
2.5V
Position
1-2
2-3
1-2
2-3
#1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Function
Normal
Clear CMOS
ATX power supply
AT power supply
#2
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
#3
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
#4
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
JP19
Open
Short
JP5
Open
Open
Short
Short
Function
CPU Frequency
60 MHz
66 MHz
50MHz
VL Bus speed
33 MHz
40 MHz
Normal
Flash programming
VGA, EGA or mono
CGA
Normal
Clear CMOS
1 wait state write transfer
0 wait state write transfer
VL Bus IDE Recovery Time
Speed 0 – High speed IDE
Speed 1 – Medium speed
Speed 2 – Slow speed
Enable onboard VL-bus IDE
LPT IRQ7
LPT IRQ5
JP6
Open
Short
Short
Short
A
CPU Speed
100MHz
120MHz
133MHz
150MHz
166MHz
180MHz
200MHz
233MHz
266MHz
Ratio
1.5x
2.0x
2.5x
3.0x
3.5x
4.0x
4.5x
Clock
50MHZ
55MHZ
60MHZ
66MHZ
75MHZ
#1
ON
OFF
ON
OFF
ON
OFF
ON
ON
ON
#4
OFF
ON
ON
OFF
OFF
ON
ON
#1
ON
ON
OFF
ON
OFF
#2
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
#5
OFF
OFF
ON
ON
OFF
OFF
ON
#2
ON
ON
ON
OFF
ON
#3
ON
ON
ON
ON
ON
ON
ON
ON
ON
#4
OFF
ON
ON
ON
ON
OFF
OFF
OFF
ON
#5
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
#6
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
#6
ON
OFF
OFF
OFF
OFF
ON
ON
#3
ON
OFF
ON
ON
OFF
P5TXI
Socket 7
Switch
SW1
S1-4
SW2
S1-7
S8
JP3
Position
S1
On
Off
On
Off
On
2, 6 On
6 On
2,3,6 On
2,3 On
4 On
On
Off
1-2
2-3
S2
On
Off
Off
Off
Off
S3
On
Off
Off
On
Off
S4
On
On
On
On
Off
Function
CPU Voltage
3.54v
2.8v
2.9v
3.2v
2.1v
150 MHz CPU Speed
180 MHz CPU Speed
200 MHz CPU Speed
233 MHz CPU Speed
266 MHz CPU Speed
SCSI High and Low Byte Termination in setup
SCSI High Byte Termination always enabled
Normal
Clear CMOS
P6NDI
Dual Pentium Pro ATX
CPU
JSS1
150MHz
2-3
180MHz
1-2
200MHz
1-2
P6NDP
Dual Pentium Pro ATX
JSS2
1-2
2-3
2-3
JSS3
1-2
1-2
1-2
JSS4
1-2
1-2
1-2
JS1
1-2
1-2
2-3
JS2
1-2
1-2
2-3
JS3
1-2
1-2
2-3
JS4
1-2
1-2
2-3
71
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
HBYEN
MONO
ECMOS
FLASH
CLPSWD
CPU
150MHz
180MHz
200MHz
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JSS1
1-2
1-2
1-2
Function
Auto SCSI High Byte Termination
Always
Colour display
Mono
Normal
Clear CMOS
Intel Flash BIOS (12v)
SST Flash BIOS (5v)
Normal
Clear Password
JSS2
1-2
1-2
1-2
JSS3
1-2
2-3
2-3
JSS4
2-3
1-2
1-2
JS3
1-2
1-2
2-3
JS4
1-2
1-2
2-3
JS5
1-2
1-2
2-3
JS6
1-2
1-2
2-3
P6NPI
Dual Pentium Pro ATX
Jumper
JS8
JS9
JS10
CLCMOS
CLPSWD
MONO
CPU
2x
2.5
3 (Default)
3.5
4
CPU
133MHz
150MHz
180MHz
200MHz
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
1-2
2-3
1-2
2-3
Function
Auto SCSI High Byte Termination
Always
Normal
ARO-1130 RAID Card installed
Fast 8-bit SCSI
Fast and Wide 16-bit SCSI
Normal 2-3 Clear CMOS
Normal
Clear Password
Colour display
Mono
JSS1
1-2
1-2
1-2
1-2
1-2
JS4
2-3
1-2
1-2
2-3
JSS2
1-2
1-2
1-2
1-2
2-3
JS5
2-3
1-2
1-2
2-3
JSS3
1-2
1-2
2-3
2-3
1-2
JS6
2-3
1-2
1-2
2-3
JSS4
1-2
2-3
1-2
2-3
1-2
JS7
2-3
1-2
1-2
2-3
P6BXI
Switch
S1-3
S4-7
Position
All Off
4
On
Off
On
Off
On
Off
5
On
On
Off
Off
On
On
6
On
On
On
On
Off
Off
7
On
On
On
On
On
On
Function
CPU external clock - Reserved
CPU multiplier
2x
2.5x
3x
3.5x
4x
4.5x
A
Alaris
Leopard LX 486SLC2 Rev C
Low cost version of Leopard SLC2/50 (no VESA slots or external cache, but faster). Made by IBM. Uses Opti 82C283 AT controller.
Jumper
JP6
Position
1-2
2-3
Function
128K cache
64K cache
Alcom Group
See Micron Design Technology Ltd
www.alcom.com.tw
ALi
Acer Labs International
1429G
Switch
JP1-3
JP4
JP13-15
17,20,48
JP23,30
JP27-28
33,36
JP32
JP39
JP43
JP49
JP51
Position
JP1
JP2
2-3
1-2
2-3
2-3
1-2
4-5
Open
Open
Open
CPU Type
486DX/DX2
DX4/M7/486SX/M6
486 Overdrive
P24T
JP23
6-7
6-7,4-5
5-6
6-7,4-5,2-3 1-2,3-4
6-7,4-5,2-3 1-2,3-4
1-2,3-4,5-6 1-2,3-4
6-7,4-5,2-3 1-2,3-4,5-6
External Bus Speed
25 MHz
33 MHz
40 MHz
50 MHz
1,3
5,7
2,4,6,8
Close
1-2
2-3
2-3,3-5
1-3,2-4
Close
Open
JP3
1-2
2-3
4-5
Open
JP30
Open
1-2
1-2
Function
SMI CPU
486/DX4
AMD 486DXL
Cyrix M6/M7
Any 5v CPU
Cyrix CPU
JP13
JP14
2-3
1-2
Open
1-2
1-2
1-2
1-2
2-3
SRAM (cache)
32K (8Kx8)
64K (16Kx8)
64K (8Kx8)
128K (32Kx8)
256K (64Kx8)
256K (32Kx8)
512K (128Kx8)
JP27
JP28
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
2 Standby Mode output
2 Suspend Mode output
GND
Colour monitor 2-3 Mono
3.3v CPU
5v CPU
Single density SIMMs
Double Density
AMD DX2-80
AMD DX4-100
JP15
2-3
1-2
2-3
2-3
JP17
Close
Open
Close
Close
JP33
1-2,5-6
1-2,3-4
5-6
1-2,5-6
JP36
1-2
1-2
1-2
2-3
JP20
1-2
1-2
1-2
2-3
JP48
1-2
1-2
1-2
1-2
73
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The PC Engineer’s Reference Book – Vol 2: Motherboards
J624
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Description
Notes
Pentium
90
ALI
AMI WinBIOS
PCI P5-60/66
Item
Chipset
BIOS
Bus
Description
ALI
Notes
4 ISA/4 PCI
1 each shared
ALR
Advanced Logic Research – makes stuff for Gateway
7200
Switch
JP22
Position
3-4
1-2,3-4
5-6
1-2, 5-6
3-4, 5-6
1-2, 3-4
5-6
1-2,5-6
Function
200 MHz
233 MHz
266 MHz
300 MHz
333 MHz
350 MHz
400 MHz
450 MHz
Position
5-6
1-2, 5-6
3-4, 5-6
1-2, 3-4
3-4,5-6
5-6
Function
266 MHz
300 MHz
333 MHz
350 MHz
366 MHz
400 MHz
8200
Switch
JP22
FlexCache 33/386
Switch
S1
S2
S3
S4
S5
S6
S7
S8
JP2,3,4
Position
On
Off*
Off*
On
Off*
On
Off*
On
Off*
On
Off*
On
Off*
Memory
Function
Cache disabled
Cache enabled
Monochrome
CGA
RAM/ROM swap enabled
RAM/ROM swap disabled
80387-33 or 3167 installed
80387-25 installed
Memory upper limit is 15.875 Mb (FDFFFF)
Memory upper limit is 15.5 Mb
Reserved
Floppy slowdown disabled
Floppy slowdown enabled
HD slowdown disabled
Bank 0
Bank 1
JP2
JP3
JP4
A
Switch
JP7-10
Position
2 Mb
4 Mb
8 Mb
10 Mb
10 Mb
16 Mb
Speed (ns)
120
100
80/85
60
120
100
80/85
60
Function
256K
256K
1 Mb
1 Mb
256K
1 Mb
J7
Out
Out
In
In
Reserved
J1,3,4
Out
256K
256K
1 Mb
1 Mb
J8
Out
Out
In
In
In
J9
Out
Out
In
In
Out
In
Out
In
Out
In
In
J10
Out
In
Out
In
75
Out
Out
In
In
Out
In
Bank
0
0
0
0
1
1
1
1
FlexCache 16/20-386
Jumper
S1
S2
S3
S4
S5
S6,7
S8
Position
Off*
On
On
Off*
On*
Off
S6
Off
Off
Off
On
S7
Off
On
Function
Mono
CGA
Reserved
Reserved
2 Mb Onboard
1 Mb Onboard
Cache enabled
Cache disabled
Maths copro
There
Not there*
High speed
Low speed
386/220
Jumper
S1
S2
S3
S4
S5
S6,7
S8
Position
Off*
On
On
Off*
On*
Off
S6
On
Off
Off
Off
On
S7
Off
On
Off
Function
Mono
CGA
Reserved
Reserved
2 Mb 32-bit memory Onboard
1 Mb 32-bit memory Onboard
Shadow RAM enabled
Shadow RAM disabled
Maths copro
80287
Not there*
80387
High speed
Low speed
Flexcache 25/386(dt)
An intelligent board that automatically knows the memory configuration upon power-up. Standard versions of the desktop include 1 Mb in banks 0 and 1;
the floor-mount has 4 Mb. Each bank supports eighteen 256 Kb by 1 DRAM chips and 1 Mb by 1 Mb chips, respectively. Additional memory requires the
32-bit FlexMem card which can provide up to 16 Mb. Another way to set the cache controller is through speed selection. When the speed is set low, the
cache is OFF. When set high, the cache is ON, thereby activating the 0 wait state.
76
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
S1
S2
S3
S4
S5
S6,7
S8
Position
Off*
On
On
Off*
On
Off*
On
Off*
On
Off*
Off*
On
Function
Cache enabled
Cache disabled (slow speed)
CGA
Mono
Shadow RAM disabled
Shadow RAM enabled
80387-20
80387-25
Reserved
Factory setting
Reserved
Slow HD access time
Fast HD access time
Standard version
Jumper
S1,2,7,8
S3,4
S5-6
Position
S1
On
Off
Off
S3
On
Off
Off
S5
Off
On
S2
Off
On
Off
S4
Off
On
Off
S6
Off
On
S7
Off
On
Off
Function
COM ports
COM1 IRQ4
COM2 IIRQ3
None
LPT IRQ
7
5
None
Floppy
Disabled
Enabled
S8
On
Off
Off
Alton
See PC Ware
Amaquest
Award BIOS ID
The last two numbers of the BIOS part number.
Code
DA
AC-00
Motherboard
AP 8548
AP 8548 rev 2
Code
BC-00
Motherboard
AP 8548
American Megatrends
See AMI
American Predator
www.americanpredator.com
American Sunshine Technologies
www.sunshinetech.com
AMI
American Megatrends - www.megatrends.com
A
Apollo
Item
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Description
75-133
Triton
4 PCI/4 ISA
128 Mb
512
2S, 1P, 1 Floppy
Notes
Description
Pentium
166
430FX
4 PCI/3 ISA
128 Mb
512
2S, 1P, 1 Floppy
Notes
1 each shared
Apollo II
Item
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
2nd generation
None shared
W/B or PB
ATLAS PCI
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Problems
Description
Pentium
90/100
SiS
Green AMI
4 PCI/4 ISA
128
512
2S, 1P, PS/2, EIDE
Notes
All PCI are Busmasters. PnP 1.0A compliant
72-pin SIMMs
256 standard
Will not recognise S3-based cards (e.g. Stealth 64 Video VRAM unless special BIOS is installed.
ATLAS PCI II
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Comments
Description
Notes
430HX
Green AMI
4 PCI/4 ISA
256
512
2S, 1P, PS/2, EIDE
All PCI are Busmasters
72-pin parity
asynchronous, synchronous, or pipelined burst
2nd generation Atlas
Excalibur PCI EISA
Item
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium
60
SiS
3 PCI/6 EISA
192
512 W/B
2S, 1P
Notes
None shared
256K standard
77
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Excalibur PCI II
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Notes
Pentium
60/66
Sis
4 PCI/4 ISA
128
512 W/B
2S, 1P
1 each shared
256K standard
Goliath
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Notes
4 Pentium Pro
200
Orion
AMI
6 PCI/4 EISA
1 Gb
Main board takes 2, secondary board 2 more.
2 PCI buses, 3 slots per bus
8 slots. ECC. DIMMs
2S, 1P
MegaPro
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Description
Notes
2 Pentium Pro
180/200
Natome
6 PCI/4 EISA
1 Gb
1 each shared. 2 PCI buses, 3 slots per bus. All busmaster
FPM, EDO or BEDO. Parity/ECC
2S, 1P
Merlin
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
Pentium Pro
180/200
Natoma
Notes
4 PCI/4 ISA
512
2 S, 1 P, 2 USB
1 each shared, 1 PCI only takes ½ length card.
FPM, EDO or BEDO. Parity/ECC
Super Voyager
Item
CPU
Speeds (MHz)
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Comments
Description
486
Notes
Pentium Overdrive
Green AMI Flash
3 PCI/4 ISA
128
256
2S, 1 P, Floppy
WinBIOS
PnP 1.0A compliant. PCI 2.0. Busmasters
72-pin SIMMs
128 standard
A
Titan II
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Description
Notes
2 Pentium
150
Neptune
4 PCI/6 EISA
512
512 W/B
None shared, all busmasters
8 rows
256 standard
Description
Notes
2 Pentium
166
Triton II
200?
4 PCI/4 EISA
384
512
1 each shared, all busmasters
6 rows
Pipelined Burst. 256 standard
Titan III
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Amjet
See J-Mark Computer Corp
AMP
See Advance Micro Products
Amptron
www.amptron.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
4C
9C
Motherboard
PM 7400
PM 7600
PM 8400
Code
HC
IC
DX 6900
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Description
AT
DX4/100
120
UMC
AMI Win
3 VESA/7 EISA
Notes
3 x 30, 2 x 72
Motherboard
PM 7600
PM 7700B
79
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP3
JP6-8
JP16
JP17
JP21-24
35
JP27-30
32, 33
Position
1-2
2-3
JP6
Off
On
Off
On
Off
On
Off
On
JP24
2-3
1-2
1-2
JP27
1-2,2-3
1-2,2-3
1-2,3-4
2-3
JP31
JP 34
JP7
Off
On
On
Off
JP8
On
On
On
Off
JP25
2-3
1-2
1-2
JP28
2-3
2-3
1-2
1-2,4-5
1-2
1-2,3-4
5-6
2-3
JP26
2-3
1-2
1-2
JP29
JP35
Off
On
Off
JP30
JP32
1-2
1-2,4-5
1-2
1-2,3-4
5-6
2-3
5-6
3-4,5-6
5-6
2-3,4-5
1-2
1-2
1-2
2-3
1-2
JP33
2-3
1-2.2-3
1-2,2-3
1-2,2-3
1-2.2-3
1-2,3-4
1-2
3-4
2-3
Off
1-2
2-3
Off
On
DX-9500
Eurone M919 v1, from the same source.
DX-9700
Eurone M919 v3, from the same source.
PM 7400
Same as PC Chips 529
PM 7600
Fugutech M 507 in disguise.
Amtec
www.antec-inc.com
Anigma
Used by Gateway 2000.
Anscera
Anson
Antec
www.antec-inc.com
Function
5v Flash ROM
12v Flash ROM
CPU Clock
25 MHz
33 MHz
40 MHz
50 MHz
VESA <=33 MHz
VESA > 33 MHz
0 VESA WS
1 VESA WS
CPU Power
5v
3.3v
4v
CPU
486SX
486DX/DX2 (Intel/AMD)
486DX2/DX4
P24D/enh AMD DX4, 5x86
P24T
Cyrix M7
UMC U5
CPU 3x
CPU 2.5x
CPU 2x
AMD DX4 3x
AMD DX4 2x
A
AOpen
AcerOpen - www.aopen.com www.aopen-usa.com www.aopenamerica.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
Motherboard
AP5T
Code
AC
Motherboard
AP65
AP 4
Jumper
JP1
JP2,3
JP4
JP30-32
JP37
Position
1-2
2-3
JP2
2-3
1-2
1-2
2-3
JP30
1-2
2-3
2-3
1-2
2-3
Cache Size
32 KB x 4 = 128K
32 KB x 8 = 256K
64 KB x 4 = 256K
64 KB x 8 = 512K
128 KB x 4 = 512K
JP3
2-3
1-2
JP31
1-2
1-2
1-2
JP24
1-2
1-2
1-2
2-3
2-3
JP32
1-2
1-2
2-3
JP25
1-2
2-3
2-3
2-3
2-3
Function
Enable FDC and Super I/O chip
Disable
ECP DMA Channel
DMA 1
DMA 3
12v Flash ROM
5v EEPROM or Flash ROM
OSC frequency
25 MHz
33 MHz
50 MHz
Normal
Clear CMOS
JP26
2-3
2-3
1-2
2-3
2-3
JP27
1-2
2-3
1-2
2-3
1-2
5v CPU
JP11
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP40
486SX SL
2-3
1-2
Open
Open
Open
Open
3-4
2-3
Open
Open
4-5
1-2
2-3
1-3, 2-4
JP11
JP12
JP13
JP14
486SX
2-3
Open
Open
Open
DX/DX2 SL
2-3
1-2
Open
Open
Open
Open
3-4
1-2, 3-4
Open
3-4
4-5
1-2
2-3
1-3, 2-4
486DX/DX2
2-3
Open
Open
Open
P24D
1-2
1-2
Open
1-2
1-2
1-2
1-2, 3-4
1-2, 3-4
Open
3-4
4-5
2-3
2-3
1-3, 2-4
CxDX/DX2
2-3
1-2
Open
Open
P24T
1-2
1-2
1-2
Open
Open
1-2
3-4
1-2, 3-4
1-2
2-3
1-2
Open
2-3
1-3, 2-4
JP29
1-2, 3-4
2-3, 4-5
1-2, 3-4
2-3, 4-5
1-2, 3-4
81
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The PC Engineer’s Reference Book – Vol 2: Motherboards
486SX
Open
Open
Open
2-3
Open
Open
Open
Open
Open
1-3, 2-4
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP40
486DX/DX2
Open
Open
Open
1-2, 3-4
Open
3-4
Open
Open
Open
1-3, 2-4
CxDX/DX2
Open
2-3
2-3
1-2, 3-4
2-3
3-4
2-3
Open
1-2
1-3, 2-4
3.45v CPU
JP11
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP40
JP11
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP40
Intel DX4
(W/T)
2-3
1-2
Open
Open
Open
Open
3-4
1-2, 3-4
Open
3-4
4-5
1-2
2-3
3-5, 4-6
Cyrix
486DX2
2-3
1-2
Open
Open
Open
2-3
2-3
1-2, 3-4
2-3
3-4
2-3
Open
1-2
3-5, 4-6
Intel DX4
(W/B)
1-2
1-2
Open
1-2
1-2
1-2
1-2, 3-4
1-2, 3-4
Open
3-4
4-5
2-3
2-3
3-5, 4-6
Cyrix DX4
(iDX4 P/O)
2-3
1-2
Open
1-2
1-2
1-2
1-2, 3-4
1-2, 3-4
Open
3-4
4-5
2-3
2-3
3-5, 4-6
AMD
DX2
2-3
Open
Open
2-3
Open
Open
Open
1-2, 3-4
Open
3-4
Open
Open
Open
3-5, 4-6
Cyrix DX4
(M7 P/O)
2-3
1-2
Open
Open
Open
2-3
2-3
1-2, 3-4
2-3
3-4
2-3
Open
1-2
3-5, 4-6
AMD DX4
(V8T)
2-3
Open
Open
Open
Open
Open
Open
1-2, 3-4
Open
3-4
Open
Open
Open
3-5, 4-6
Cyrix
5X86
2-3
1-2
Open
1-2
1-2
1-2
1-2, 3-4
1-2, 3-4
Open
3-4
4-5
2-3
2-3
3-5, 4-6
AMD DX4-S
(SV8B)
1-2
1-2
Open
1-2
1-2
1-2
1-2, 3-4
1-2, 3-4
Open
3-4
4-5
2-3
2-3
3-5, 4-6
TI
486DX2
2-3
1-2
Open
Open
Open
2-3
2-3
1-2, 3-4
2-3
3-4
2-3
Open
1-2
3-5, 4-6
AP 43
Jumper
JP21
JP22,23
JP24
JP25-27
Position
1-2
2-3
JP22
2-3
1-2
1-2
2-3
JP25
2-3
2-3
JP23
2-3
1-2
JP26
1-2
1-2
JP27
1-2
2-3
Function
Enable FDC and Suoer I/O chip
Disable
ECP DMA Channel
DMA 1
DMA 3
5v EEPROM or Flash ROM
12v Flash ROM
OSC frequency
25 MHz
33 MHz
AMD DX4-S
(SV8T)
2-3
1-2
Open
Open
Open
Open
3-4
1-2, 3-4
Open
3-4
4-5
1-2
2-3
3-5, 4-6
A
Jumper
JP28
Position
1-2
1-2
2-3
1-2
Function
50 MHz
Normal
Clear CMOS
1-2
5v CPU
JP6
JP7
JP8
JP9
JP10
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP29
486SX SL
Open
2-3
Open
Open
1-2
Open
2-3
2-3
Open
3-4
Open
1-2
4-5
2-3
DX/DX2 SL
Open
2-3
Open
Open
1-2
Open
2-3
1-2, 3-4
3-4
3-4
Open
1-2
4-5
2-3
P24D
Open
1-2
1-2
1-2
1-2
Open
2-3
1-2, 3-4
3-4
1-2, 3-4
1-2
2-3
4-5
2-3
P24T
1-2
1-2
Open
Open
1-2
1-2
2-3
1-2, 3-4
2-3
3-4
1-2
Open
1-2
2-3
Intel/AMD
486DX/DX2
Cyrix 486DX/
DX2
JP6
JP7
JP8
JP9
JP10
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP29
Intel/AMD
486SX
Open
2-3
Open
Open
Open
Open
Open
2-3
Open
Open
Open
Open
Open
2-3
Open
2-3
Open
Open
Open
Open
Open
1-2, 3-4
3-4
Open
Open
Open
Open
2-3
Open
2-3
Open
Open
1-2
2-3
1-2
1-2, 3-4
3-4
2-3
2-3
Open
2-3
2-3
Intel DX4
(W/T)
Open
2-3
Open
Open
1-2
Open
Open
2-3
1-2, 3-4
3-4
3-4
Open
1-2
4-5
1-2
Intel DX4
(W/B)
Open
1-2
1-2
1-2
1-2
Open
Open
2-3
1-2, 3-4
3-4
1-2, 3-4
1-2
2-3
4-5
1-2
3.45V CPU
JP6
JP7
JP8
JP9
JP10
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP29
AMD
DX2
Open
2-3
Open
2-3
Open
Open
Open
Open
1-2, 3-4
3-4
Open
Open
Open
Open
1-2
AMD DX4
(V8T)
AMD DX4-S
(SV8T)
Open
2-3
Open
Open
Open
Open
Open
Open
1-2, 3-4
3-4
Open
Open
Open
Open
1-2
Open
2-3
Open
Open
1-2
Open
Open
2-3
1-2, 3-4
3-4
3-4
Open
1-2
4-5
1-2
AMD DX4-S
(SV8B)
Open
1-2
1-2
1-2
1-2
Open
Open
2-3
1-2, 3-4
3-4
1-2, 3-4
1-2
2-3
4-5
1-2
83
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The PC Engineer’s Reference Book – Vol 2: Motherboards
JP6
JP7
JP8
JP9
JP10
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP29
TI DX2
Cyrix DX2/
DX4 (M7 /O)
Open
2-3
Open
Open
1-2
Open
2-3
1-2
1-2, 3-4
3-4
2-3
2-3
Open
2-3
1-2
Open
2-3
Open
Open
1-2
Open
2-3
1-2
1-2, 3-4
3-4
2-3
2-3
Open
2-3
1-2
Cache Size
32 KB x 4 = 128 KB
32 KB x 8 = 256 KB
64 KB x 4 = 256 KB
64 KB x 8 = 512 KB
128 KB x 4 = 512 KB
JP1
1-2, 3-4
2-3, 4-5
1-2, 3-4
2-3, 4-5
1-2, 3-4
Cyrix DX4
(iDX4 P/O)
5X86
Open
2-3
1-2
1-2
1-2
Open
Open
2-3
1-2, 3-4
3-4
1-2, 3-4
1-2
2-3
4-5
1-2
JP2
1-2
2-3
1-2
2-3
1-2
JP3
2-3
2-3
1-2
2-3
2-3
TI DX4
AMD
Am5x86
Open
2-3
Open
Open
1-2
2-3
2-3
1-2
1-2, 3-4
3-4
2-3
2-3
Open
2-3
1-2
Open
1-2
1-2
1-2
1-2
1-2
Open
2-3
1-2, 3-4
3-4
1-2, 3-4
1-2
2-3
4-5
1-2
JP4
1-2
1-2
1-2
2-3
2-3
JP5
1-2
2-3
2-3
2-3
2-3
AP 53
Jumper
JP3,13
JP11
JP12
Position
JP3
1-2,3-4
Open
1-2
3-4
5-6
7-8
9-10
11-12
1-2
3-4
JP13
Open
1-2,3-4
Function
CPU Type
Single voltage CPU
Dual voltage CPU
3.45v CPU core (default for P54C)
3.52v
2.5v
3.2v
2.8v
2.9v
3.43v CPU I/O voltage
3.52v
AP 55CS
Jumper
JP1
JP3
JP4,6,7
JP8
JP11,12
JP13
JP14
JP18
Position
1-2
2-3
1-2,3-4,5-6
JP4
1-2
Open
1-2
2-3
1-2
1-2,3-4,5-6
1-2
2-3,5-6
1-2,5-6
2-3,4-5
JP6
1-2
2-3
JP7
2-3
3-4
Function
Linear cache (Cyrix)
Interleave cache (Intel)
Reserved
VGA
Enable
Disable
Reserved
ECP DMA 1
ECP DMA 3
Reserved
Enable FDC and Super I/O chip
5v Flash ROM
12v Flash ROM
EEPROM
A
Jumper
JP19
Position
1-2
2-3
CPU Type
P54C-75
P54C-90
P54C-100
P54C/CS/CQS-120
P54C/CS/CQS-133
P54CS/CQS-150
P54CS/CQS-166
Cyrix 6x86-P120+
Cyrix 6x86-P150+
Cyrix 6x86-P166+
Function
Normal
Clear CMOS
JP9
2-3
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
JP10
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
2-3
JP22
2-3
2-3
2-3
1-2
1-2
1-2
1-2
Open
Open
Open
JP23
2-3
2-3
2-3
2-3
2-3
1-2
1-2
Open
Open
Open
AP 57
Jumper
JP7
JP8
JP9-11
Position
1-2
3-4
5-6
7-8
9-10
11-12
1-2
3-4
JP9
Close
Open
JP10
Open
Close
JP11
Close
Open
JP2
1-2
1-2
2-3
2-3
1-2
2-3
2-3
1-2
JP5
2-3
2-3
2-3
1-2
2-3
1-2
JP3
1-2
1-2
1-2
1-2
2-3
2-3
2-3
2-3
JP6
1-2
2-3
1-2
1-2
2-3
2-3
Function
3.45v CPU core (default for P54C)
3.52v
2.5v
3.2v
2.8v
2.9v
3.43v CPU I/O voltage
3.52v
CPU Type
Single voltage CPU
Dual voltage CPU
AP 58
Jumper
JP1-3
JP4-6
JP8
JP11
Position
JP1
1-2
2-3
2-3
1-2
2-3
2-3
1-2
1-2
JP4
2-3
2-3
1-2
2-3
1-2
2-3
1-2
3-4
1-2
3-4
5-6
7-8
9-10
11-12
Function
CPU Frequency Ratio
1.5 (3.5 for 233 MMX)
2
2.5 (1.75 for PR 166)
3
4
4.5
5
5.5
CPU External Clock
50
55
60
66
75
83.3 Internal test only
Sync PCI Clk
Async
3.45v CPU core (default for P54C) Single Voltage
3.52v Single Voltage
2.9v
2.8v
3.2v
2.2v
85
86
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP 14
Position
1-2
2-3
Function
Normal
Clear CMOS
JP 18
1-2
2-3
Enable onboard Super I/O
Disable
AP 5C
Jumper
JP3,4
JP5
JP6
JP9-10
JP11
JP12
JP13
JP14,16
JP15
Position
1-2
2-3
1-2
2-3
Closed
Open
JP9
1-2
2-3
2-3
2-3
2-3
2-3
2-3
1-2,3-4
1-2
3-4
1-2
2-3
1-2
2-3
JP14
Off
On
1-2
2-3
JP10
1-2,3-4
1-2,3-4
1-2,3-4
3-4,5-6
3-4,5-6
5-6,7-8
5-6,7-8
JP16
On
Off
Function
ECP DMA Channel 3
ECP DMA Channel 1
Enable SMC 665GT Super I/O controller
Disable
Enable PS/2 mouse
Disable
CPU Type
P54-75
P54C-90
P54C-100
P54C/CS/CQS-120
P54C/CS/CQS-133
P54CS/CQS-150
P54CS/CQS-166
50 MHz host clock
60 MHz host clock
66 MHz host clock
256K cache
512K cache
5v Flash ROM
12v Flash ROM
SRAM
3.3V SRAM
3.3V/5V Mix Mode SRAM
Normal
Clear CMOS
AP 5CP
Jumper
JP 1,2
JP 3
JP 4
JP 5,6,8
JP 7
Position
JP1
1-2
2-3
1-2
2-3
Closed
Open
JP5
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
1-2
1-2
2-3
JP2
1-2
2-3
JP6
1-2,3-4
1-2
3-4
1-2
3-4
1-2
3-4
3-4
1-2,3-4
JP8
1-2,3-4
1-2,3-4
1-2,3-4
3-4,5-6
3-4.5-6
5-6,7-8
5-6,7-8
1-2,7-8
Open
Function
ECP DMA Channel
DMA 3
DMA 1
Enable Super I/O controller
Disable
Enable PS/2 mouse
Disable
CPU Type
75
90
100
120
133
150
166
200
Cyrix 6x86 P120+
256K cache
512K cache
Resistors at R260, 261, 262, 263 allow 3.3/5v SRAMs. For 3.3v,
A
Jumper
Position
JP9
1-2
2-3
1-2
2-3
JP12
Function
install zero-ohm resistors at R249, 253, 254, 255
5v Flash ROM
12v Flash ROM
Normal
Clear CMOS
AP 5CS
Jumper
JP2
Position
1-2
2-3
1-2
JP5
1-2
2-3
1-2
2-3
JP10
1-2
1-2
2-3
1-2
2-3
2-3
JP14
1-2
1-2
2-3
JP13
1-2
2-3
2-3
JP 3
JP 5,6
JP 7
JP 10,11,17
JP 12
JP 14,16
JP13,15
JP 18,19
JP6
1-2
2-3
JP11
1-2
2-2
2-3
2-3
2-3
JP17
1-2
1-2
1-2
2-3
2-3
JP16
1-2
2-3
2-3
JP15
1-2
2-3
Function
Clear CMOS
Normal
Reserved
ECP DMA Channel
DMA 3
DMA 1
Enable Super I/O controller
Disable
CPU Type
75
90
100
120
133
Reserved
Cache
256K
512K
1 Mb
Flash ROM Type
Flash ROM
EEPROM
Reserved
AP 5S
Jumper
JP1
JP6,7
JP5,13
JP8
JP10
JP12
JP16
JP18-20
Position
1-2
2-3
1-2
2-3
1-2, 3-4, 5-6
1-2
2-3
1-2
1-2
2-3
1-2
2-3
JP18
JP19
Closed
Open
Open
Closed
CPU Frequency
75 MHz
90 MHz
100 MHz
JP3
2-3
2-3
1-2
JP4
2-3
1-2
2-3
JP20
Open
Open
JP14
2-3
2-3
2-3
Function
Linear cache (Cyrix)
Interleave cache (Intel)
ECP DMA Channel 3
ECP DMA Channel 1
P54C CPU
12v Flash ROM
5v Flash ROM
Enable PS/2 mouse
Normal
Clear CMOS
Enable Super I/O controller
Disable
CPU voltage
VRE Type
STD Type
JP15
2-3
2-3
2-3
87
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The PC Engineer’s Reference Book – Vol 2: Motherboards
CPU Frequency
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
JP3
2-3
1-2
2-3
1-2
1-2
JP4
1-2
2-3
1-2
2-3
2-3
JP14
2-3
2-3
1-2
1-2
1-2
JP15
1-2
1-2
1-2
1-2
2-3
AP 5V
Jumper
JP 5,6
Position
JP5
Closed
Open
1-2
2-3
JP8
Open
Closed
JP10
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JP 7
JP 8,9
JP 10,11
JP12
JP 13
JP 14
JP 15
JP 16
JP 17,18,20
JP 22,23
JP 24
CPU Frequency
75 MHz *
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
JP6
Closed
Open
JP9
Open
Closed
JP11
1-2
2-3
JP1
1-2
1-2
1-2
1-2
1-2
2-3
2-3
2-3
JP2
1-2
1-2
1-2
2-3
2-3
2-3
2-3
1-2
Function
CPU Type
P54C
P55C
3.45 CPU voltage
3.52
DIMM Type
SDRAM
EDO/FPM
ECP DMA Channel
DMA 3
DMA 1
Normal
Clear CMOS
Enable I/O controller
Disable
ISA Clk/3
ISA Clk/4
Enable PS/2 mouse
Disable
12v Flash ROM
5v Flash ROM
Reserved
Reserved
8 MHz KB Clock
12 MHz KB Clock
JP3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
1-2
JP4
1-2
1-2
2-3
1-2
2-3
1-2
2-3
2-3
AP 61
Pentium Pro
Jumper
JP 1,3
JP 2
JP 5,7
Position
JP1
3-4,5-6,7-8
1-2,3-4,7-8
1-2,3-4,7-8
2-3
1-2
JP5
1-2
JP3
1-4,3-6
1-4,3-6
2-5
JP7
1-2
Function
CPU Frequency
150 MHz
180 MHz
200 MHz
Enable Enhanced IDE
Enable Super I/O
DMA Channel
DMA 1
A
Jumper
JP 9
JP 10
JP11
JP 12
JP 13
Position
2-3
2-3
1-2
2-3
Open
Closed
Open
Closed
Open
Closed
1-2, 3-4, 5-6, 7-8
3-4, 5-6, 7-8
1-2, 5-6, 7-8
5-6, 7-8
1-2, 3-4, 7-8
3-4, 7-8
1-2, 7-8
7-8
1-2, 3-4, 5-6
3-4, 5-6
1-2, 5-6
5-6
1-2, 3-4
3-4
1-2
Open
Function
DMA 2
5v Flash ROM
12v Flash ROM
Enable PS/2 mouse
Disable
Normal
Clear CMOS
Standard CPU
Overdrive
3.5v CPU
3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
VIS (autodetect)
AP 65-1
Pentium Pro
Jumper
JP3
JP5-6
JP7
JP14
JP18
JP20
Position
1-2
2-3
JP5
JP6
1-2
1-2
2-3
2-3
1-2,3-4,5-6,7-8
3-4,5-6,7-8
1-2,5-6,7-8
5-6,7-8
1-2,3-4,7-8
3-4,7-8
1-2,7-8
7-8
1-2,3-4,5-6
3-4,5-6
1-2,5-6
5-6
1-2,3-4
3-4
1-2
Open
1-2
2-3
1-2
2-3
2-3
1-2
Function
3x CPU clock
2.5x CPU clock
External bus clock
66 MHz
60 MHz
3.5v
3.4v
3.3v
3.2v
3.1v
3v
2.9v
2.8v
2.7v
2.6v
2.5v
2.4v
2.3v
2.2v
2.1v
Auto
Normal
Clear CMOS
Enable Super I/O controller
Disable
Disable PS/2 mouse
Enable
89
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The PC Engineer’s Reference Book – Vol 2: Motherboards
AP 65-2
Pentium Pro
Jumper
JP 1
JP 2
CN 13,14
JP 4,5
JP 6
JP 7
JP 8
CN 13
CN 15
Position
Open
Closed
JP2
CN13
3-4,5-6,7-8 2-4,3-5
3-4,5-6,7-8 4-6,1-3
1-2,5-6,7-8 2-4,3-5
1-2,5-6,7-8 4-6,1-3
JP4
JP5
1-2
1-2
2-3
2-3
1-2
2-3
Open
Closed
1-2, 3-4, 5-6, 7-8
3-4, 5-6, 7-8
1-2, 5-6, 7-8
5-6, 7-8
1-2, 3-4, 7-8
3-4, 7-8
1-2, 7-8
7-8
1-2, 3-4, 5-6
3-4, 5-6
1-2, 5-6
5-6
1-2, 3-4
3-4
1-2
Open
1-5
2-6
1-2
2-3
CN14
2-4,3-5
4-6,1-3
2-4,3-5
4-6,1-3
Function
Normal
Clear CMOS
CPU Frequency
150 MHz
166 MHz
180 MHz
200 MHz
ECP DMA Channel
DMA 3
DMA 1
Enable Super I/O
Disable
Standard CPU
Overdrive
3.5v CPU
3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
VIS (autodetect)
115.2 Kbps (5v) IR module
4 Mbit (3.3v)
8 MHz KB Clock
12 MHz KB Clock
AX3S Pro
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
ATX
Pentium III/Celeron
866 MHz/533 MHz
Intel 815E
Award Die-Hard
5 PCI 1 AMR 1 AGP
512
PS/2 Mouse and Keyboard, 4 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Description
ATX
Pentium III/Celeron
933 MHz/700 MHz
Apollo Pro 133A
Notes
Socket 370
66-166 FSB
3 DIMM sockets
2 EIDE controllers, UDMA/100
AX34 Pro
Jumperless
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Socket 370
66-150 FSB
A
Item
BIOS
Bus
Sound
Memory (Mb)
I/O
Description
Award Die-Hard
4 PCI 1 AMR 1 AGP 1 ISA
Yamaha YMF752-S
1.5 Gb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
AX 53
CPU Freq.
75 MHz P54C
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
150 MHz P55C
166 MHz
200 MHz
120+ 6x86
133+
150+
PR75 K5
PR90
PR100
Jumper
JP 1
JP 3
JP 6
JP 7
JP 9
JP 12
JP 14
JP 15
JP 16
JP2
1-2, 3-4
1-2, 3-4
1-2, 3-4
3-4, 5-6
3-4, 5-6*
5-6, 7-8
5-6, 7-8
1-2, 7-8
5-6, 7-8
5-6, 7-8
1-2, 7-8
Open
Open
Open
1-2
1-2
1-2
Position
1-2
3-4
1-2
3-4
5-6
7-8
9-10
11-12
1-2
3-4
1-2
3-4
1-2
2-3
1-2
3-4
Closed
Open
1-2
3-4
1-2
2-3
JP3
3-4
3-4
3-4
3-4
3-4
3-4
3-4
3-4
7-8
7-8
7-8
1-2
1-2
1-2
3-4
3-4
3-4
JP4
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
Open
Open
Open
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
1-2, 3-4, 5-6
JP5
Open
Open
Open
Open
Open
Open
Open
Open
1-2, 3-4
1-2, 3-4
1-2, 3-4
Open
Open
Open
Open
Open
Open
Function
ATX power supply off
On
3.52v Core CPU Voltage
3.43
2.9
2.8
2.7
2.5
3.52 I/O voltage
3.45
256 K cache
512 K cache
Normal
Clear CMOS
Enable Super I/O controller
Disable
Enable PS/2 mouse
Disable
Keyboard clock ISA
12 MHz
Cache module without tag
With tag
JP8
1-2, 3-4
1-2
3-4
1-2
3-4*
1-2
3-4
3-4
1-2
3-4
3-4
1-2, 3-4
Open
1-2
1-2, 3-4
1-2
3-4
Notes
3 DIMM sockets
2 EIDE controllers, UDMA/100
91
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The PC Engineer’s Reference Book – Vol 2: Motherboards
AX59 Pro
Item
Form Factor
CPU
Cache
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium/K6
1 Mb
Via MVP3
Award
4 PCI/2 ISA
768 Mb
2 EIDE, floppy
Notes
Super Socket 7
UDMA/33
3 DIMM sockets – 2 SIMM
AGP
AX 5T
Jumper
JP 1,2,3
JP 4,5,6
JP 9,10
JP 11
JP 14
Position
JP1
1-2
2-3
2-3
1-2
JP4
1-2
2-3
2-3
1-2
JP9
1-2,3-4
Open
1-2
3-4
5-6
7-8
9-10
11-12
1-2
2-3
JP2
1-2
1-2
1-2
2-3
JP5
2-3
2-3
1-2
1-2
JP10
Open
1-2,3-4
JP3
1-2
1-2
1-2
1-2
JP6
1-2
1-2
1-2
2-3
Function
CPU Frequency Ratio
1.5 (3.5 PMT 233)
2
2.5 (1.75 PR 166)
3
CPU External Clock
60 MHz
66
75
83.3 (internal test only)
SC652B does not support 83.3
CPU Type
Single Voltage
Dual Voltage
3.45v Core CPU Voltage
3.52
2.9
2.8
3.2
2.5
Normal
Clear CMOS
AX 65
Pentium Pro
Jumper
JP1
Position
1-2,3-4,5-6,7-8
3-4,5-6,7-8
1-2,5-6,7-8
5-6,7-8
1-2,3-4,7-8
3-4,7-8
1-2,7-8
7-8
1-2,3-4,5-6
3-4,5-6
1-2,5-6
5-6
1-2,3-4
3-4
1-2
Open
Function
3.5v
3.4v
3.3v
3.2v
3.1v
3v
2.9v
2.8v
2.7v
2.6v
2.5v
2.4v
2.3v
2.2v
2.1v
Auto
A
Jumper
JP3-4
Position
JP3
3-4
1-2
3-4
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
JP11
1-2
2-3
2-3
1-4
JP6
JP7
JP8
JP10
JP11,12
JP14
JP4
3-4,5-6,7-8
3-4,5-6,7-8
1-2,3-4,7-8
1-2,3-4,7-8
Function
CPU Frequency
150 MHz
166 MHz
180 MHz
200 MHz
Enable Super I/O controller
Disable
Keyboard clock as ISA clock
12 MHz
Disable PS/2 mouse
Enable
Normal
Clear CMOS
Flash ROM boot block programming
Enable
Reserved
Toggle type power switch
Momentary type
JP5
3-4
1-2
3-4
1-2
JP12
1-2
2-3
AX 63
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Celeron
500
VIA Apollo Pro Plus
Award 4.51PGM
5 PCI/2 ISA
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Slot 1
3 DIMM sockets
UDMA/66
AGP
AX63 Pro
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium III
Via Apollo Pro 133
Award
5 PCI
768 Mb
2 EIDE, floppy, ser, par etc
Notes
Slot 1
133 FSB
UDMA/33
3 RIMM sockets
AGP 2x
AX 6B(C)(Pro)
Pentium II – Jumperless, except for:
Jumper
JP14
JP23
Item
Form Factor
Position
1-2
2-3
1-2
2-3
Function
Normal
Clear CMOS
Auto AGP Turbo
Enabled
Description
ATX
Notes
93
94
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
Pentium II/Celeron
500
440BX
Award 4.51PGM
5 PCI/2 ISA
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Slot 1
8x CPU clock multiplier
3 DIMM sockets
AGP
Good – better than Gigabyte GA-6BXF
AX6BC Pro Gold
Item
Form Factor
CPU
Cache
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium III
Notes
Slot 1
440BX
Award
5 PCI/2 ISA
768 Mb
2 EIDE, floppy, ser, par etc
UDMA/33
3 DIMM sockets
AGP
AX 6C
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Celeron
Intel 820
Award 4.51PGM
5 PCI
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
AX 6F
Pentium II
Jumper
JP1-2
JP5,6
JP14
Position
JP1
2-3
1-2
1-2
1-2
1-2
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2
2-3
JP5
1-2
2-3
1-2
2-3
JP2
1-2
1-2
1-2
2-3
2-3
1-2
1-2
2-3
2-3
1-2
1-2
2-3
2-3
1-2
JP6
1-2
2-3
JP3
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
Function
Clock Multiplier
1.5x
2x
2.5x
3x
3.5x
4x
4.5x
5x
5.5x
6x
6.5x
7x
7.5x
8x
CPU External clock
66 MHz
60 MHz
Normal
Clear CMOS
Notes
Slot 1
3 RIMM sockets (RDRAM)
UDMA/66
AGP 4x
A
AX 6L(C)(Lite)
As for AX 6B(C), except no JP23
DP 5
Dual Pentium
Selection
Single processor
Dual processor
Jumper
JP 1
JP 2,3
JP 4
JP 5
JP 6
JP 7
JP 8
JP 9-12
JP 13
JP14
JP 16,23
JP 22
JP 24,26
JP 25
JP17
Open
Closed
Position
1-2
2-3
JP2
1-2
2-3
Open
Closed
Open
Closed
1-2
2-3
1-2
2-3
Open
JP9
2-3
1-2
1-3,2-4
1-2,3-4
Open
Closed
JP16
Open
1-3
1-3
Open
Closed
JP24
1-2
2-3
1-2
JP18
Open
Closed
JP19
2-3
1-2
JP20
2-3
2-3
JP3
1-2
2-3
JP10
2-3
1-2
JP23
1-2
1-2
1-2
JP26
2-3
2-3
JP11
Open
Closed
JP12
Open
Closed
JP21
1-2
1-2
Function
5v Flash ROM
12v Flash ROM
ECP DMA Channel
DMA 1
DMA 3
Enable SCSI Termination
Disable
Enable PS/2 mouse
Disable
Enable Super I/O
Disable
Enable Enhanced IDE
Disable
Reserved
SCSI Device Size
8-bit
16-bit
Enable L2 parity
Disable
Normal
Clear CMOS
CPU Type/Speed
P54C 75
90
100
L1 write-back
L1 write through
Cache size
256K
512K
Reserved
MX3W
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
Micro-ATX
Celeron
Intel 810
Award
3 PCI 1 AMR
512 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy, joystick, audio
Notes
Socket 370
100 FSB
2 DIMM sockets
95
96
The PC Engineer’s Reference Book – Vol 2: Motherboards
P5M
Jumper
JP1,2
JP3,4
JP 7
JP 8
JP 9-12
JP 14
JP 18
JP 20
JP 25
Position
JP1
1-2
2-3
2-3
1-2
JP3
2-3
1-2
2-3
1-2
3-4
5-6
7-8
9-10
11-12
1-2
3-4
JP9
1-2,3-4
Open
1-2
2-3
1-2
2-3
1-2
2-3
Open
1-2,3-4
JP2
1-2
1-2
2-3
2-3
JP4
2-3
2-3
1-2
JP10
Open
1-2,3-4
JP11
1-2,3-4
Open
JP12
Open
1-2,3-4
Function
CPU Frequency Ratio
1.5 (3.5 for 233 MMX)
2
2.5 (1.75 for PR 166)
3
CPU External Clock
50
60
66
3.45v CPU core (default for P54C) Single
Voltage
3.52v Single Voltage
2.9v
2.8v
3.2v
2.1v
I/O voltage 3.45
3.52
CPU Type
Single Voltage
Dual Voltage
Normal
Clear CMOS
Enable onboard Super I/O
Disable
Enable PS/2 mouse
Disable
SDRAM
EDO
Appro
www.appro.com
Apricot
Xen-I 386
Jumper
J1
J3
J4
J5
J6
J7
S1
S2
S3
S5,6
Position
In
Out*
In
Out*
In
Out*
In
Out*
ST 506 interface
ST 506 interface
On*
Off
On*
Off
On*
Off
Memory
Function
256K ROM
512K ROM
Disable reset
Enable reset
Non-latched mode
Latched mode
Disabled ROM
Enabled ROM
Not used
Step rate selected
Enable parallel port
Disable parallel port
Enable serial port
Disable serial port
Colour display
Mono display
5
6
PAL Type
A
Jumper
Position
1 Mb
2 Mb
4 Mb
5 Mb
8 Mb
256K
256K
1 Mb
1 Mb/256K
1 Mb
S7,8
Function
Off
On
On
Off
Off
On
On
Off
Off
Off
Reserved – do not use
Xen-S
Jumper
SW1,2
SW3,5,6
SW4
SW7
SW8
SW9-S1
SW9-S2
SW9-S3
SW9-S4
SW9-S5
SW9-S6
SW9-S7
SW9-S8
SW10
Position
Processor
80386sx
80286
Monitor
Enable colour
Disable colour
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Function
SW1
SW2
On
Off
Off
On
SW3
SW5
SW6
On
On
On
Off
Off
Off
12.5 MHz
16 MHz
Processor 20 MHz override
Corpocessor speed select
Enable password
Disable password
Enable COM1
Disable COM1
Enable floppy
Disable floppy
Enable HD controller
Disable HD controller
Enable COM2
Disable COM2
Enable Ethernet
Disable Ethernet
Enable LPT1
Disable LPT1
Enable colour
Disable colour
Enable thick Ethernet cable
Disable thick Ethernet cable
Aprocom
www.aprocom.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC
Nex586v
Fordlian 5IVXA
Motherboard
Nex586v
Code
Motherboard
LEP8047VA
LEP8047VA
L4M047VA
L4M047VA
L4M047VA
97
98
The PC Engineer’s Reference Book – Vol 2: Motherboards
Arche
Parade 88
Jumper
JP15
JP11
JP16
JP10
JP12
Position
Out
In
In
Out
1-2
2-3
In
Out
1-2
2-3
Function
Parallel port=LPT1
Parallel port=LPT2
Enable game port
Disable game port
Enable floppy
Disable floppy
Composite signal monitors
Colour/multiscan monitors
Clock 1 enable
Clock 2 disable
Rival 386
Jumper
JP1,2
JP3
JP4(P4)
JP5
Position
CoProcessor
There
Not there*
In
Out
1-2*
2-3
In*
Out
Function
JP1
JP2
Out
In
In
Out
Colour display
Mono display
Power Good from Power Supply
Power Good generated on board
Onboard rechargeable battery
External battery on J4
Parade 286
ATM 1260V
Jumper
J1
J9,15,17
J18,21
J19,20
J22
J8
J16
J10,11
Position
Out
In
Parallel Port
LPT1 enabled
LPT2 enabled
LPT1 disabled
LPT2 disabled
Serial Port 1&3
COM1 enabled
COM3 enabled
COM1 disabled
COM3 disabled
Serial Port 2&4
COM2 enabled
COM4 enabled
COM2 disabled
COM4 disabled
In
Out
In
Out
In
Out
Display
Enable Mono
Disable Mono
Function
Other BIOS 27128 x 2 (U28L/U27H)
DTK BIOS or other 27256 x 2 (U28L/U27H)
J15
J17
J9
In
In
1-2
Out
Out
2-3
Out
In
In
Out
J18
J21
In
In
Out
Out
Out
In
In
Out
J18
J21
In
In
Out
Out
Out
In
In
Out
Colour display
Mono display
1 wait state
0 wait state
Enable floppy
Disable floppy
J10
J11
In
In
Out
Out
A
Parade 286 Plus
AMA1240V3
Jumper
S3
S4
S6-8
JP7,9
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
J20
J23-25
Position
On
Off
On
Off
Memory Size
512K
640K
640+384K
640+384K (24 EMS)
640+1408K
640+1408K (88 EMS)
640+3456K
640+3456K (216 EMS)
Clock speed
External
Low speed
High speed
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
HD Status
Enabled
Disabled
Function
Parity check enabled
Parity check disabled
EMS port address 0E8-0EFH
EMS port address 098-09FH
S6
S7
S8
On
On
On
On
On
Off
On
Off
On
On
Off
Off
Off
On
On
Off
On
Off
Off
Off
On
Off
Off
Off
JP7
JP9
In
1-2
Out
Out
IRQ7
IRQ5
IRQ4
IRQ5
IRQ3
IRQ5
COM1 address 3E8-3EF
COM1 address 3F8-3FF
COM2 address 2E8-2EF
COM2 address 2F8-2FF
LPT1 address 378-37F
LPT1 address 278-27F
Floppy address 3F0-3F7
Floppy address 370-377
2-speed drive
Fixed speed drive
Enable floppy
Disable floppy
J23
J24
J25
1-2
1-2
1-2
2-3
2-3
2-3
AMA232C-16S
Jumper
JP1
JP3
JP4
JP5
JP6
JP7
Position
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
In*
Out
Function
Normal ops
Clear CMOS
Enable floppy
Disable floppy
Enable COM2
Disable COM2
Enable parallel port
Disable parallel port
Enable COM1
Disable COM1
Enable Onboard HD
Disable Onboard HD
Bank0
512K
512K
512K
512K
2Mb
2Mb
2Mb
2Mb
Bank1
None
512K
512K
None
None
2Mb
2Mb
99
100
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP11
Position
1-2
2-3
1-2
2-3
In
Out
Display type
Enable VGA
Disable VGA
1-2
2-3
1-2
2-3
JP13
JP14
JP15,16
JP17
JP23
Function
1 VGA BIOS
2 VGA BIOS
Non-interlaced monitor
Interlaced monitor
Enable IRQ9
Disable IRQ9
JP15
JP16
In
In
Out
Out
256K BIOS
128K BIOS
1 VGA BIOS
2 VGA BIOS
KMA232F-12S
Jumper
S1-1
S1-2
Position
On*
Off
On
Off
On
Off*
On
Out
In
LPT address
378
278
1-2
2-3
1-2*
2-3
Out*
In
In*
Out
1-2
2-3
DRAM size
S1-3
S1-4
JP1
JP3,J3
JP4
JP3
JP6
JP7
JP8-13
JP14-16
JP18
JP17
1-2
2-3
All in
Function
Reserved – do not change
48-49KHz horizOntal scan (non-interlaced)
Lower scan rates (interlaced)
Fast address decode
Slow address decode
16-bit data path (VGA)
8-bit data path (VGA)
Disable HD
Enable HD
J3
JP2
LPT1
2-3
LPT2
278
Enable COM2
Disable COM2
Enable floppy
Disable floppy
Normal ops
Allows use of network cards without IRQ9 conflict
Enable CGA
Enable Mono
SIMMs
DIP DRAM
Base
Ext
Shad
JP14
512
In
640
384
In
640
In
640
256
128
In
640
1408
Out
640
1280
128
Out
640
3328
128
Out
2 DRAM
4 DRAM
3-4
2-4
1-2
Maths copro 12 MHz
Maths copro 8 MHz
Maths copro 4 MHz
Parade 386sx
AMA1600V
Jumper
JP1
Position
In*
Function
CGA
JP15
In
In
Out
Out
In
In
Out
JP16
In
Out
In
Out
In
Out
Out
A
Jumper
JP3
JP6
JP11
JP19
Position
Out
In*
Out
1-2
2-3*
In*
Out
In*
Out
Function
Mono
Enable HD
Disable HD
Enable floppy
Disable floppy
Pipeline operation
Non-pipeline
Floppy IRQ enabled
Floppy IRQ disabled
Parade 386sx
KMA932C-16S
Jumper
JP2,17
JP16
JP18
JP19
JP20
SW1-S1
SW1-S2
SW1-S3
SW1-S4
Position
Floppy
Enable
Disable
In*
Out
In*
Out
In*
Out
In*
On
Off
On
Off
On
Off*
Function
JP2
JP17
In
Out
Out
In
Primary display VGA
Primary display Mono
Enable 1st serial port
Enable 1st serial port
Enable 2nd serial port
Enable 2nd serial port
Enable HD
Multifrequency display timing
Standard frequency timing
PS/2 style - all VGA modes
AT style – colour modes on colour monitors, Mono on Mono
Reserved
16-bit video memory path – autosense 16-bit BIOS
8-bit video memory path and BIOS
Rival 386sx
AMA2000
Jumper
JP1
JP2
JP4
Position
In
Out
1-2
2-3*
In*
Out
Function
Mono display
Colour display
Clear CMOS
Normal ops
Pipeline operation
Non-pipeline
Rival 386-20
PAT386+
Jumper
JP1
JP2
JP4
JP5
Position
In*
Out
In*
Out
1-2*
2-3
1-2
2-3
Function
Onboard battery
External battery on J2
Colour display
Mono display
Power good generated on board
Power good from power supply
CPU Clock (SCLK)
Oscillator 3
101
102
The PC Engineer’s Reference Book – Vol 2: Motherboards
JP6,7
J4
Maths copro
Not there
There
1-2*
3-4
JP6
JP7
In*
Out
Out
In
Turbo mode
Deturbo (emulate 10MHz AT)
Rival 386-25C
KMA300G-25
Jumper
JP3
Position
1-2
2-3*
In*
Out
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
JP4
JP5
JP6
JP7
JP8
JP10
JP12,13,20
Cache
32K
64K
In*
Out
JP18
Function
Clear CMOS
Normal ops
Pipeline
Non-pipeline
Enable CPU NMI pin
Disable CPU NMI pin
Enable CPU hold (Bus hold request) pin
Disable CPU hold (Bus hold request) pin
Enable CPU INIR
Disable CPU INIR
ATCLK from ICLK/2
ATCLK from 14.318 MHz OSC/2
Reserved
JP12
JP13
JP20
Out
1-2
1-2
In
2-3
2-3
Colour display
Mono display
Rival 386-25
AMA2530
Jumper
W1
W19
JP1
W21
SW1-1
SW1-2
SW1-3
SW1-4,5
SW1-6
SW1-7
Position
1-2
2-3*
In*
Out
In
Out*
1-2
2-3*
On
On
Off
On
Off
On
Off
SW1-8
Arima
Aristo
www.aristo-world.com
Function
128K EPROM
256K EPROM
8 MHz bus speed
12.5 MHz bus speed
256K SIMM DRAM
1Mb SIMM DRAM
Cache mode
Page mode
Reserved
Maths copro installed
CKM=0, CLK divided internally by 3 by 80287
CKM=1, 1/3 duty cycle CLK connect to 80287
Reserved
CGA
Mono
80387 installed, if SW1-2 is On
80287 installed, if SW1-2 is On
Reserved
A
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
EC
Motherboard
AM 430TX
AM 430TX+
Code
EC-00
GC
Motherboard
AM 439VX
AM 430TX+
AM 430TX
Vtech/PC Partner MB 540N/Yellow Dragon TX
AM 439VX
VTech/PC Partner MB 520NH
Arstoria
Award BIOS ID
The last two numbers of the BIOS part number.
Code
CC
Motherboard
AS 496
Code
Motherboard
Arvida
See also Seanix www.arvida.ca www.seanix.com
ASI
Aquarius Systems Inc
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0
0-30
1
1
Motherboard
MB 4D33/50NR-02
MB 4D33/50NR-02
MB 5DVP/54VP v2.1
MB 4DUPM/E v3.0
Code
1-00
2
9C-00
KC-00
ASK Technology
www.asiansources.com/asktech.co
Aspen Systems
www.aspsys.com
AST
Advantage! 4/33s
Jumper
E1
Position
1-2*
Function
Parallel port IRQ7
Motherboard
MB 4DUVC
MB 54VP v2.1
MB 4DSP 1.1
MB 4DUPC
103
104
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
E2
E3
E4
E5
E6-10
E14
Position
2-3
On
Off
On*
On
Off*
On
Off*
CPU
80486SX (PQFP)
80486SX (PGA)
80487SX/ODP
80486DX/DX2/ODPR
Pentium Overdrive
On*
Function
Parallel port IRQ5
25 MHz CPU external speed
33 MHz CPU external speed
Enable VGA
Primary display Mono
Primary display colour
Override password (borrow jumper at E1)
Enable password
E6
E7
E8
1-2
On
2-3
1-2
Off
1-2
1-2
On
2-3
1-2
On
1-2
2-3
On
2-3
Enable game port (501540 only)
E9
1-2
2-3
1-2
2-3
1-2
E10
2-3
1-2
2-3
2-3
2-3
Cyrix
DX2-SL
On
1-2
Off
Off
Off
2-3
Off
2-3
Off
Off
Off
On
On
2-3
2-3
AMD
DX2-SL
On
1-2
Off
Off
Off
2-3
Off
1-2
On
On
On*
Off
Off
2-3
2-3
Advantage! 4/50(s)(d)
As for Advantage! 4/33s
Advantage! Adventure 4/33s
As for Advantage! 4/33s
Advantage! Adventure 4/50(s)(d)
As for Advantage! 4/33s
Advantage! 4050d
As for 4066d.
Advantage! 4066d
Jumper
486SX
486DX
487SX
486SX
486DX2
486SL
1201
Off
On
On
Off
1202
2-3
1-2
1-2
2-3
1203
Off
Off
Off
On
1204
Off
Off
Off
On
1205
Off
Off
Off
Off
1206
Off
2-3
1-2
Off
1207
Off
Off
Off
On
1208
Off
Off
Off
2-3
1209
Off
Off
Off
Off
1210
Off
Off
Off
Off
1211
Off
Off
Off
Off
1212
Off
Off
Off
Off
1213
Off
Off
Off
Off
1301
1-2
1-2
1-2
1-2
1302
1-2
1-2
1-2
1-2
* on means that pins 1-2, 3-4 and 5-6 are covered by a jumper.
Jumper
1171
1172
1173
25/50 MHz
Off
Off
On
33/66 MHz
On
On
On
486DX
DX2/SL
On
1-2
On
On
Off
2-3
On
2-3
Off
Off
Off
Off
Off
1-2
1-2
A
Jumper
1214
1215
1216
1217
5v
On
Off
2-3
Off
3.3v
Off
On
2-3
On
Advantage! 4075p
Jumper
1020
1104
1152-4
1350
1351
1505
1506
1961
Total
2
4
4
8
8
16
16
20
32
32
36
40
48
64
64
80
128
Position
1152
On
Off
On
Off*
2-3
Off*
2-3
1153
Off
On
Off
1154
Off
Off
On
Off*
On
1501 (Bk 0)
1
1
2
2
4
4
8
2
8
16
16
4
8
16
32
8
32
1502 (Bk 1)
1
1
2
2
4
4
8
2
8
16
16
4
8
16
32
8
32
Function
Test – leave Off
Test – leave Off
CPU speed
50/75 MHz*
60/90 MHz
66/100 MHz
Standard LPT
ECP
Standard LPT
ECP
See table
Test – leave Off
Normal boot
Clear CMOS at boot
1503 (Bk 1)
1
2
4
8
8
8
16
16
16
32
32
1504 (Bk 1)
1
2
4
8
8
8
16
16
16
32
32
1505
Off
1-2
Off
2-3
Off
1-2
Off
2-3
2-3
Off
1-2
1-2
2-3
1-2
Off
2-3
2-3
Advantage! 6033s
Jumper
E1
E2
E3
E4
E5
E6-10
Position
1-2*
2-3
On
Off
On*
On
Off*
On
Off*
CPU
80486SX (PQFP)
Function
Parallel port IRQ 7
Parallel port IRQ 5
CPU external speed 25 MHz
CPU external speed 25 MHz
Enable VGA
Mono
CGA
Override password
Allow password
To override a password, borrow the jumper at E1 (don’t forget to replace it).
E6
E7
E8
E9
E10
1-2
On
2-3
1-2
2-3
105
106
Jumper
E14
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
80486SX (PGA)
80487SX; ODP
80486DX; DX2; ODPR
Pentium Overdrive
On
Off*
E17
E18
Function
1-2
Off
1-2
1-2
On
2-3
1-2
On
1-2
2-3
On
2-3
Update BIOS at boot
Normal boot
Reserved – leave on 2-3
Microphone input – leave Off
2-3
1-2
2-3
1-2
1-2
2-3
2-3
2-3
Advantage! 6060p
Jumper
E1
E2,3,7
E4
E5
E6
E8
E9
E10
E11
E12
E13
Position
1-2
2-3*
Bus Speed (MHz)
50 (P75)
60 (P90)
66 (P100)
Function
Future upgrades
Pentium 75/90/100
E2
E3
Off
On
Off
On
On
On
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
Left set of figures apply if an IMI415 is at U7. Right set apply if an IMI470 is installed.
Manufacturer test
Manufacturer test
Manufacturer test
Manufacturer test
Colour
Mono
Enable access to setup
Disable access to setup
Enable video
Disable video
Allow password
Override Password
Normal boot
Force flash update at boot
E7
On
Off
Off
E2
Off
Off
On
E3
On
On
On
E7
Off
On
On
Advantage! 6066d
As for Advantage! 610/611
Advantage! 6075p
As for Advantage! 6060p, except E14 (On=update BIOS at boot. Off=normal).
Advantage! 610
Jumper
E1
E2
E3
E4
E5
E6-10
Position
Off*
Off*
On*
Off
On
Off*
On
Off*
CPU
80486SX
80487SX; ODP
80486DX; DX2; ODPR
Pentium Overdrive
Function
Reserved
Reserved
Enable VGA
Disable VGA
Mono
CGA
Override password
Allow password
E6
E7
1-2
Off
1-2
On
1-2
On
2-3
On
E8
Off**
Off**
Off**
Off**
E9
2-3
1-2
2-3
2-3
E10
1-2
2-3
2-3
2-3
A
Jumper
Position
E14
On
Off*
Function
** E8 is reserved – always Off
Socket set for 3.345v
Update BIOS at boot
Normal boot
Reserved – leave on 2-3
Microphone input – leave Off
E17
E18
To override a password or force a BIOS update, borrow the jumper from E7 (don’t forget to replace it).
Advantage! 611
As for 610, except:
CPU
Cyrix 5x86
486DX4/100
OverDrive
E6
1-2
1-2
1-2
E7
Off
Off
Off
E9
2-3
2-3
1-2
E10
2-3
2-3
2-3
Advantage! 612
Jumper
J4 K1
J5 J1-2
J5 K2
J6 A2
Advantage! 613e
As for Advantage! 611
Advantage! 614
As for Advantage! 612
Advantage! 621
As for Advantage! 612
Advantage! 623/624
As for Advantage! 612
Position
1-2
2-3*
4-5*
5-6
CPU speed
75
90
100
120
133
150
166
1-2*
2-3
4-5*
5-6
1-2*
2-3
Function
ISA bus 1/3 PCI clock speed
ISA bus ¼ PCI clock speed
Allow access to setup
Deny access to setup
PCI
J1
J2
25
1-2,4-5
1-2,4-5
30
1-2,5-6
1-2,4-5
33
2-3,4-5
1-2,4-5
30
1-2,5-6
2-3,4-5
33
2-3,4-5
2-3,4-5
30
1-2,5-6
2-3,5-6
33
2-3,4-5
2-3,5-6
Normal boot
Clear CMOS at boot
Enable password
Clear and disable password
Standard CPU voltage (3.3v)
VRE CPU voltage (3.6v)
107
108
The PC Engineer’s Reference Book – Vol 2: Motherboards
Advantage! 625/626
As for Advantage! 612
Advantage! 628
As for Advantage! 612
Advantage! 7301
Jumper
J1F1A
J1F1B
J1F1
J5G1
Position
1-2*
2-3
4-5*
5-6
1-2*
2-3
4-5
5-6
CPU
25
30
100
120
133
150
166
180
200
1-2,4-5*
PCI
33
30
33
30
33
30
33
Function
Normal boot
Erase password
Normal boot
Reset CMOS at boot
Allow access to CMOS setup
Deny access
Standard CPU voltage (3.3v)
VRE CPU voltage (3.6v)
J1F1C
J1F1D
2-3,5-6
1-2,4-5
2-3,4-5
1-2,4-5
1-2,5-6
1-2,4-5
2-3,4-5
2-3,4-5
1-2,5-6
2-3,4-5
2-3,4-5
2-3,5-6
1-2,5-6
2-3,5-6
2-3,4-5
1-2,5-6
1-2,5-6
1-2,4-5
Manufacturer’s test
60 ns EDO RAM is installed at the factory. You can mix EDO and FPM but not within banks
Advantage! 7302
As for 7301.
Advantage! 7303
As for 7301, but with J9B1 for Flash BIOS recovery in position 2-3 (1-2 is default for normal boot).
Advantage! 8066d
Switch
S1
S2
S3
S4
S5
S6
S7
S8
Position
On
Off*
On*
Off
On*
Off
On
Off*
On*
Off
Function
Force flash BIOS update at boot
Normal boot
Allow password
Override password
Primary display colour
Primary display is Mono
Deny access to setup
Allow access
Enable VGA
Disable
Reserved
Reserved
Reserved
A
Advantage! 8090p
As for 6075p.
Advantage! 810
As for 612.
Advantage! 811
As for 612.
Advantage! 812
As for 612.
Advantage! 814
As for 612.
Advantage! 816
As for 612.
Advantage! 818
As for 612.
Advantage! 821
As for 612.
Advantage! 822
As for 612.
Advantage! 823
As for 612.
Advantage! 824
As for 612.
Advantage! 826
As for 612.
Advantage! 828
As for 612.
Advantage! 9303
As for 7301, but with J9B1 for Flash BIOS recovery in position 2-3 (1-2 is default for normal boot).
109
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Advantage! 9304
As for 7301.
Advantage! 9306
As for 7301.
Advantage! Adventure 8060p
As for Advantage! 6060p except E4-E6 depend on the board version – look under the AST logo for a part
number with an extension of either –3-1 or –302. For the former, E4-E6 should be Off. For the latter, E4
in means cache is installed. E4-E6 on means no external cache.
Advantage! Adventure 8066d
Jumper
E1
E2
E3
E4
E5
E6
E7
E8
E9
E10
E11
E12
E13
E14
E15
E16
Switch
S1
Position
On
Off
1-2
2-3
1-2
2-3
Function
Overdrive L1 cache write through
Overdrive L1 cache write back
Disable PQFP CPU
Enable
Standard 486SX or DX
Pentium Overdrive or w/b 486DX
1-2
2-3
On
Off
On
Off
see also E10
3x internal CPU speed (DX4)
2.5x
2x
256K L2 cache
64K L2 cache
Reserved – leave on 1-2
25 MHz PCI bus speed
33 MHz PCI bus speed
Clear CMOS at boot
Normal boot
25 MHz host bus speed
33 MHz
On
Off
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
On
Off
Off
1-2
2-3
See also E7
Standard 486 PGA CPU (w/t cache)
Enhanced 486 PGA CPU (w/b cache)
Intel CPU
Cyrix CPU
Intel CPU
Cyrix CPU
Intel CPU
Cyrix CPU
Intel CPU
Cyrix CPU
Intel CPU
Cyrix CPU
5v Intel/Cyrix CPU
3v Cyrix
3v Intel
Off
1-2
2-3
On
Off
Position
On
Off*
Function
Force flash BIOS update at boot
Normal boot
A
Switch
S2
S3
S4
S5
Position
On*
Off
On*
Off
On
Off*
On*
Off
S6
S7
S8
111
Function
Allow password
Override password
Primary display colour
Mono
Deny access to setup
Allow access
Enable VGA
Disable
Reserved – leave On
Reserved – leave On
Reserved – leave On
Advantage! Adventure 8075p
As for Advantage! 6060p.
Advantage! Adventure 8090p
As for Advantage! 6060p except E4-E6 depend on the board version – look under the AST logo for a part
number with an extension of either –3-1 or –302. For the former, E4-E6 should be Off. For the latter, E4
in means cache is installed. E4-E6 on means no external cache.
Advantage! Adventure 8100p
Jumper
S1
S2
S3
S4
S5
S6
S7-8
Position
On
Off*
On
On
Off*
Off
On
7
Off
On
Off
On
Off
8
Off
Off
On
Off
On
Function
Reserved – leave On
Reserved – leave On
Override password
Allow password
Clear CMOS
Deny access to setup
Allow access
CPU speed external x 1.5
CPU speed external x 2
CPU external speed
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
J5J1 should left on 1-3 and 5-7 and J9C1 on 2-3 for 100/133 MHz. Change J9C1 to 1-2 for 120 MHz (VRE). For a failed BIOS update, force a read of an
update file from floppy by moving J5J1 to position 1-2.
Advantage! Adventure 8120p
As for Adventure 8100p.
Advantage! Adventure 8133p
As for Adventure 8100p.
Advantage! EXP P/60
Jumpers are in 3-pin blocks, grouped in pairs, positioned front-rear looking from the front.
112
The PC Engineer’s Reference Book – Vol 2: Motherboards
230822-001 board
Jumper
J7A1
J13H3
J13H1
J12H1
Position
Rear L Pair
Front L Pair
Rear R Pair
Front R Pair
Rear L Pair
Front L Pair
Rear R Pair
Front R Pair
Rear L Pair
Front L Pair
Rear R Pair
Front R Pair
Rear L Pair
Front L Pair
Rear R Pair
Front R Pair
Function
Enable video
Disable
60 MHz
66 MHz
Primary display colour
Primary display Mono
Disable access to CMOS
Enable access
Clear CMOS at boot
Disable
Disable password
Enable password
Disable flash BIOS recovery
Enable flash BIOS recovery
Disable flash BIOS write protect
Enable
230822-002 board
Jumper
J7A1
J12G5
J12G1
J12H1
Position
Rear R Pair
Front R Pair
Rear L Pair
Front L Pair
Rear R Pair
Front R Pair
Rear L Pair
Front L Pair
Rear R Pair
Front R Pair
Rear L Pair
Front L Pair
Rear R Pair
Front R Pair
Function
Inactive
60 MHz
66 MHz
Primary display colour
Primary display mono
Disable access to CMOS
Enable access
Clear CMOS at boot
Disable
Disable password
Enable password
Disable flash BIOS recovery
Enable flash BIOS recovery
Disable flash BIOS write protect
Enable
Advantage! Plus 4/25
Jumper
E1
E2
E3
E4
E5
E6,7,9,10
E8
E14
E16
Position
Off
Off
On*
Off
On
Off*
On
Off*
CPU
80486SX
80486DX/DX2
Off
On
Off*
Off
Function
Reserved
Reserved
Enable video
Autosense add-in video
Primary display Mono
Primary display colour
Override password (borrow jumper at E7)
Enable Password
E6
E7
E9
E10
1-2
Off
2-3
1-2
1-2
On
2-3
2-3
Upgrades are not supported
Reserved
Update BIOS at boot
Normal ops
Reserved
Advantage! Plus 4/33 (Mylex)
Jumper
Position
Function
A
Jumper
JP1
JP8-10
JP7, 11-13
JP14-17
JP18
JP19
JP20
JP21
Position
On*
Off
JP8
Off
2-3
1-2
2-3
1-2
JP7
Off
On
JP14
2-3
2-3
Off
1-2
2-3*
1-2*
2-3
Off
1-2
2-3*
JP9
2-3
1-2
1-2
1-2
1-2
JP11
Off
On
JP15
2-3
1-2
JP10
Off
On
On
On
On
JP12
Off
Off
JP16
1-2
1-2
Function
Colour display
Mono
CPU Type
486SX
487SX
DX, DX2
ODP
ODPR
Cache Size
64K/none
256K
CPU Speed
25/50 MHz
33/66 MHz
Reserved
LPT IRQ5
LPT IRQ7
Enable I/O
Disable
External battery at JP22
Clear CMOS
Internal battery
JP13
Off
On
JP17
2-3
2-3
Advantage! Plus 4/33 (MT)
Jumper
S1
S2
S3
S4
S5
S6
S7
S8
E5
E6-8
E9-13
E14
E15
E16
E800
E801
Position
On
Off
On
Off*
On
Off*
On*
Off
Off
Off
On
Off*
On
Off*
E6
1-2
2-3
E9
Off
1-2
2-3
1-2
2-3
1-2
1-2
1-2*
2-3
On
Off
E7
Off
On
E10
2-3
1-2
1-2
1-2
1-2
1-2
E8
Off
On
E11
1-2
2-3
1-2
2-3
1-2
2-3
E12
Off
On
On
On
On
On
E13
2-3
2-3
2-3
2-3
2-3
1-2
Function
Disable video
Reserved
Force flash BIOS update at boot
Normal boot
Override password
Enable password
Primary display colour
Mono
Reserved
Reserved
Deny access to setup
Allow access
Clear CMOS at boot
Normal boot
Cache size
64K/none
256K
CPU Type
486SX
487SX
DX, DX2
Overdrive (ODP)
Overdrive (ODPR)
Pentium Overdrive
Reserved
LPT IRQ7
LPT IRQ5
CPU external speed 33 MHz
CPU external speed 25 MHz
Reserved – leave on 2-3
Reserved – leave on 1-2
113
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
E802
Position
1-2
2-3*
Function
Enable monitor power conservation
Disable
Reserved – leave on 1-2
Reserved – leave on 1-2
E803
E804
Advantage! Plus 4/50d
As for Advantage Plus 4/25
Advantage! Plus 4/50d (Mylex)
As for Advantage! Plus 4/33 (Mylex).
Advantage! Plus 4/66d
As for Advantage Plus 4/25
Advantage! Plus 4/66d (Mylex)
As for Advantage! Plus 4/33 (Mylex).
Advantage! Plus 4/66d (MT)
As for Advantage! Plus 4/33 (MT).
Advantage! Plus 5/100
Jumper
JP1
JP3-5
BF0,BF1
JP8
JP9
JP14
Position
On
Off*
CPU
50
66
50
60
66
60
166
1-2*
2-3
On
Off
On*
Off
Bus (MHz)
66
Function
VGA IRQ enabled
VGA IRQ disabled
JP3
JP4
JP5
Off
Off
Off
On
Off
On
On
Off
Off
On
On
Off
On
Off
On
On
On
Off
On
Off
On
Asynchronous L2 cache
Synchronous Pipeline Burst L2 cache
CPU VR voltage (3.3-3.4v)
CPU VRE voltage (3.4v-3.6v)
Allow password
Override password
BF0
1&2
1&2
2&3
2&3
2&3
2&3
2&3
BF1
Off
Off
Off (Cyrix M1)
Off (Cyrix M1)
Off
On
On
Advantage! Plus 5/75
Jumper
JP1,19
JP2
JP3-9
Position
CPU Ext Speed (MHz)
20
25
33*
On*
Off
CPU Type
i486/Cyrix 5x86*
Cyrix 486
Function
JP1
JP19
1-2
3-4
1-2
5-6
Allow password
Override and erase password
JP3
JP4
JP5
Off
On
On
On
Off
Off
See also JP20-23
JP6
On
Off
JP7
Off
Off
JP8
On
Off
JP9
Off
On
A
Jumper
JP11
JP16
JP17
JP20-23
JP29
JP30
JP31
V1-V4
Position
1-2*
2-3
1-2*
2-3
1-2*
CPU Type
i486/Cyrix 5x86*
Cyrix 486
Function
DX CPU
SX CPU
128K L2 cache
256K L2 cache
Leave on pins 1-2 (L2 cache size)
JP20
JP21
JP22
Off
Off
Off
On
Off
On
On*
On*
Off
On*
Off
On
Off*
See also JP 3-9
Enable video
Primary display colour
Primary display Mono
Normal boot
Force flash update at boot
5v
3.45v
JP23
Off
Off
Advantage! Plus EXP P/60
Jumper
S1
S2
J17,25
J18
J19
J20
J28
J30,31
52-54
J38
J51
Position
On*
Off
None
1-2
3-4
5-6
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
Cache size
256K
512K
1-2,5-6
3-4
Off*
On
Function
Reserved – leave Off
Colour adapter
Mono
No DMA channel for EPP
Channel 0
Channel 1
Channel 2
LPT IRQ7
LPT IRQ5
COM1 IRQ4
COM1 IRQ3
COM2 IRQ3
COM2 IRQ4
Enable mouse
Disable
J30
J31
Off
Off
On
On
60 MHz
66 MHz
Write protect flash BIOS
Allow update
J52
1-2
2-3
J53
1-2
2-3
J54
1-2
2-3
Advantage! Pro 4/100t
Jumper
E1,6,20
Position
Cache
Write-through
Write-back
Function
E1
1-2
2-3
E2
1-2*
2-3
CPU
80486SX (LIF socket)
80486 (PQFP)
E1=VL Bus; E6=Pentium Overdrive; E20=Cyrix DX2
Parallel port IRQ7
Parallel port IRQ5
E3
E4
E5
E13
1-2
1-2
1-2
On
2-3
2-3
2-3
Off
E3,4,5,13
E6
1-2
2-3
E20
Off
On
115
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
E7
E8
E9
E10
E11
E12,14
E15
E16
E17,18,19
Position
Pentium Overdrive
All other (168/169 pin)
Function
2-3
2-3
On*
On*
Off
On*
On*
Off
Off*
Cache size
256K cache
64K or no cache
On
Off
Off*
CPU Brand
Intel
Cyrix
DX2 boards support 5v only; DX4 boards support 3v only
Enable VGA
Primary display colour
Primary display Mono
Reserved – leave On
Enable password
Disable password
Reserved – leave Off
E12
E14
On
On
Off*
Off*
25 MHz CPU external speed
33 MHz CPU external speed
Reserved – leave Off
E17
E18
E19
1-2
1-2
1-2
2-3
2-3
2-3
1-2
2-3
2-3
2-3
On
On
Advantage! Pro 4/25s
Jumper
E1,2,3
E4
E5
E6
E9,10
E12
E11,13-17
Position
Cache size
256K cache
64K or no cache
On*
Off
On*
On*
Off
CPU speed
33 MHz
25 MHz
1-2*
2-3
CPU
80486SX (PQFP)
80486SX (LIF socket)
80486DX/DX2/ODPR
ODP/80487SX
Pentium Overdrive
Advantage! Pro 4/33(s)
As for Advantage! Pro 4/25s
Advantage! Pro 4/50d
As for Advantage! Pro 4/25s
Advantage! Pro 4/66d
As for Advantage! Pro 4/25s
Function
E1
E2
E3
On
On
On
Off*
Off*
Off*
Primary display colour
Primary display Mono
Enable VGA/autosense
Enable password override (disable and erase)
Disable password override (allow password)
E9
E10
Off
Off
On
On
Parallel port IRQ7
Parallel port IRQ5
E11
E13
E14
E15
Off
Off
1-2
1-2
On
Off
1-2
1-2
On
On
2-3
1-2
On
On
1-2
1-2
On
On
2-3
2-3
5v processors only
E16
1-2
1-2
2-3
2-3
2-3
E17
1-2
1-2
1-2
1-2
Off
A
Advantage! Pro Adventure 4/25s
As for Advantage! Pro 4/25s
Advantage! Pro Adventure 4/33s
As for Advantage! Pro 4/25s
Advantage! Pro Adventure 4/50d
As for Advantage! Pro 4/25s
Bravo 286
Jumper
E1
E2
SW2
SW3
Position
Out*
Out*
Colour
Mono
1-2
Function
Reserved
Reserved
CGA, EGA or VGA installed
Normal ops
Bravo 286/386sx
Jumper
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
Position
On*
Off*
On
Off*
Off*
On*
On*
On*
Off
Off*
On
Off*
Off*
Function
Enable VGA
Set password override
Inhibit password override
Reserved
Reserved
Reserved
Reserved
PS/2 video
AT video
VGA or fixed frequency monitors
Multi-frequency monitors
Reserved
Reserved
Bravo 286/386sx
Jumper
E1
E2,3
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
Position
Out
In*
On*
Off*
On
Off*
Off*
On*
On*
On*
Off
Off*
On
Off*
Off*
Function
Reserved
Enable memory parity
Reserved
Enable VGA
Set password override
Inhibit password override
Reserved
Reserved
Reserved
Reserved
PS/2 video
AT video
VGA or fixed frequency monitors
Multi-frequency monitors
Reserved
Reserved
117
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Bravo LC 4/33(s)
As for Advantage! Pro 4/100t, except use SL enhanced for all 3x 168- or 169-pin 486, except SX. DX2
system boards support only 5v CPUs, DX4 support only 3v. The 94 Cyrix model supports only 3v SLenhanced CPUs.
Bravo LC 4/50(s)(d)
As for Bravo LC 4/33(s).
Bravo LC 4/66d
As for Bravo LC 4/33(s).
Bravo LC 4/100t
As for Bravo LC 4/33(s).
Bravo LC 5100
As for Advantage! Plus 5/100.
Bravo LC 5133
As for Advantage! Plus 5/100.
Bravo LC 5166
As for Advantage! Plus 5/100.
Bravo LC P/75
Jumper
JP1,19
JP2
JP3-9
JP11
JP16
JP17
JP20-23
JP29
JP30
JP31
V1-4
Position
JP1
JP19
1-2
1-2
1-2
3-4
1-2
5-6
On*
Off
CPU
i486/Cyrix 586
Cyrix 486
1-2*
2-3
1-2*
2-3
1-2
CPU type
i486/Cyrix 5x86*
Cyrix 486
On*
Off
On*
Off
On*
Off
On
Off*
Function
CPU speed
20 MHz
25 MHz
33 MHz*
Allow password
Override and erase
JP3
JP4
JP5
Off
On
On
On
Off
Off
DX CPU
SX CPU
128K cache
256K cache
Leave on 1-2 (external cache size)
JP20
JP21
JP22
Off
Off
Off
On
Off
On
Enable video
Disable
Primary display colour
Primary display Mono
Normal boot
Force flash update at boot
5v CPU
3.45v CPU
JP6
On
Off
JP23
Off
Off
JP7
Off
Off
JP8
On
Off
JP9
Off
On
A
Bravo LC (LC2) 4/25s
As for Advantage! Pro 4/25s
Bravo LC (LC2) 4/33s
As for Advantage! Pro 4/25s
Bravo LC (LC2) 4/50d
As for Advantage! Pro 4/25s
Bravo LC (LC2) 4/66d
As for Advantage! Pro 4/25s
Bravo LC3/33s
Jumper
E1
E2
E3
SW1-S1
SW1-S2
SW1-S3
SW1-S4
Position
1-2*
Out*
In
Out
In*
On*
Off*
On
Off*
Off*
Function
Reserved
Clear CMOS
Reserved
Reserved
LPT on IRQ7
Enable VGA
Set password override
Inhibit password override
Reserved
Reserved
Bravo LC P/100
As for MS P/75.
Bravo LP 4/25s
As for Advantage! Plus 4/33 (MT)
Bravo LP 4/33(s)
As for Advantage! Plus 4/33 (MT)
Bravo LP 4/50s
As for Advantage! Plus 4/33 (MT)
Bravo LP 4/66d
As for Advantage! Plus 4/33 (MT)
Bravo MS 4/33s
As for Advantage! Adventure 8066d.
Bravo MS 4/50s
As for Bravo MS 4/33s.
119
120
The PC Engineer’s Reference Book – Vol 2: Motherboards
Bravo MS 4/66d
As for Bravo MS 4/33s.
Bravo MS 4/100t
As for Bravo MS 4/33s.
Bravo MS 5100 (Vixen)
Jumper
J4G1
J4L1A
J4L1B
J4L1C,D
J6C2
J6C2
Position
1-2,4-5*
2-3,5-6
1-2*
2-3
4-5*
5-6
1-2*
2-3
4-5*
C
2-3,5-6
2-3,4-5
1-2,5-6
2-3,4-5
1-2,5-6
2-3,4-5
1-2,5-6
1-2*
1-2*
4-5
5-6
D
1-2,4-5
1-2,4-5
1-2,4-5
2-3,4-5
2-3,4-5
2-3,5-6
2-3,5-6
Function
2 PCI slots on riser
2 PCI slots on riser
Normal boot
Erase password
Normal boot
Reset CMOS at boot
Allow access to CMOS
Prevent access
Factory setting
CPU
Bus speed
75
25
90
30
100
33
120
30
133
33
150
30
166
33
Factory setting
Factory setting
VRE (3.6v)
Standard voltage (3.3v)
Bravo MS 5133
As for Bravo MS 5100 (Vixen).
Bravo MS 5166
As for Bravo MS 5100 (Vixen).
Bravo MS P/60
As for Advantage!6060p.
Bravo MS P/75
As for Advantage! 6060p
Bravo MS P/75 (Eagle)
Jumper
E1
E2
E4
E5
Position
On*
Off
On
Off
On*
Off
On*
Function
Onboard speaker
External speaker
VR voltage (3.3-3.4v)
VRE voltage (3-4-3.6v)
Normal boot
Force flash update at boot
Allow password
A
Jumper
E7
E12
E13
E14
E15
E16
Position
Off
On*
Off
1-2*
2-3
1-2*
2-3
E17
E19
Int CPU
60
75
80
90
100
100
120
133
150
166
Function
Override password
Enable access to setup
Disable access to setup
Reserved – leave Off
Reserved – leave Off
Reserved – leave Off
Output to speaker
Output to line
Output to speaker
Output to line
Reserved – leave Off
Reserved – leave Off
Ext CPU
40
50
40
60
50
66
60
66
60
66
E3
2-2
2-3
1-2
2-3
1-2
2-3
1-2
1-2
1-2
1-2
E6
On
On
Off
On
Off
On
Off
Off
On
On
Bravo MS P/75 (Morrison)
As for Advantage! 612.
Bravo MS P/90
As for Advantage! 6060p.
Bravo MS P/100
As for Advantage! 6060p.
Bravo MS P/100 (Eagle)
As for Bravo MS P/75 (Eagle).
Bravo MS P/100 (Morrison)
As for Advantage! 612.
Bravo MS P/120
As for Bravo MS P/75 (Eagle).
Bravo MS P/133 (Eagle)
As for Bravo MS P/75 (Eagle).
E8
On
On
On
On
On
On
On
On
Off
Off
E10
Off
Off
Off
On
Off
On
On
On
On
On
E11
On
Off
On
Off
Off
On
Off
On
Off
On
E18
Off
Off
Off
Off
Off
Off
Off
Off
On
On
E20
Off
On
Off
On
On
On
On
On
On
On
121
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Bravo MS P/133 (Morrison)
As for Advantage! 612.
Bravo MS P/166 (Morrison)
As for Advantage! 612.
Bravo MS-T 4/66
As for Bravo MS 4/33s
Bravo MS-T P/75
As for Advantage! 6060p
Bravo MS-T P/90
As for Advantage! 6060p
Bravo MS-T P/100
As for Bravo MS P/75 (Eagle)
Bravo MS-T P/133 (Eagle)
As for Bravo MS-T P/75 (Eagle)
Bravo MS-T P/133 (Morrison)
As for Advantage! 612
Bravo MS-T 5100 (Vixen)
As for Bravo MS 5100 (Vixen)
Bravo MS-T 5133 (Vixen)
As for Bravo MS 5100 (Vixen)
Bravo MS-T 6150
Denali
Jumper
J29
J25A-D
J25E
J25F
J25G
Position
On
Off
A
Up
Down
Up
Down
Up
Up*
Down
Up*
Down
Up*
Down
B
Up
Down
Up
Down
Up
C
Up
Down
Down
Up
Up
D
Up
Up
Up
Down
Down
Function
CPU 3.1v
Autodetect
CPU speed
133 MHz
150 MHz
166 MHz
180 MHz
200 MHz
Allow password
Override password
Normal boot
Erase CMOS at boot
Enable access to setup
Disable
A
Jumper
J25H
J25I
Position
Up*
Down
Up
Down
Function
BIOS write-protected
Allow BIOS flash update
60 ns SIMMs
70 ns SIMMs
Bravo MS-T P/166
As for Advantage! 612
Bravo MS-T 5166 (Vixen)
As for Bravo MS 5100 (Vixen)
Bravo MS-L 4/66d
As for Bravo MS 4/33s
Bravo MS-L P/75
As for Advantage! 6060p
Bravo MS-L P/90
As for Advantage! 6060p
Bravo MT 4/33(s)
As for Advantage! Plus 4/33 (MT)
Bravo MT 4/50(s)
As for Advantage! Plus 4/33 (MT)
Bravo MT 4/66d
As for Advantage! Plus 4/33 (MT)
Bravo MT P/60
As for Advantage! Plus EXP P/60
Cupid ISA
Jumper
E1
E2
E3
Position
PWD*
1-2
Out*
Out*
Function
Enable password
Override password
Reserved
Reserved
Cupid Clem ISA
Jumper
S1
S2
S3
Position
Off*
On
Off*
Off*
Function
Set password override
Inhibit password override
Reserved
Reserved
123
124
Jumper
S4
S5
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Off*
On
On*
Function
Analogue or VGA display
Multifrequency display
Enable VGA
Cupid EISA
Jumper
E1
E2
E3
E4
E5
E6
E7
Position
In*
In*
Out*
1-2
2-3
Out*
Out*
2-3*
Function
Reserved
Reserved
Reserved
Disable password override
Enable password override
Enable VGA
Reserved
Reserved
Cupid Tower ISA
Jumper
S1
S2
S3
S4
Position
Off*
Off*
On
Off*
Off*
Function
Reserved
Set password override
Inhibit password override
Reserved
Boot without keyboard
Cupid Tower EISA
Jumper
E1
E2
E3
E4
E5
E6
Position
Out*
1-2
2-3*
Out*
In*
In*
Out*
Function
Reserved
Inhibit password
Set password
Reserved
Reserved
Reserved
Reserved
Manhattan G560
As for Advantage! 6060p.
Manhattan G590
As for Advantage! 6060p.
Manhattan P5090
As for Manhattan S6200.
Manhattan P5100
As for Manhattan S6200.
Manhattan P5133
As for Manhattan S6200.
A
Manhattan S6200
SW2 on mainboard and SW1 on processor board are for reporting revision information to diagnostics.
Switch
S1
S2
S3
S4
S5
Position
On
Off*
On
Off*
On
Off*
On
Off*
On
Off*
E1
Function
Force BIOS update at boot
Normal operation
Override password
Allow password
Mono display
Colour display
Clear EISA CMOS at boot
Normal boot
Deny access to setup
Allow access to setup
Clear CMOS
Manhattan V5090
As for Manhattan S6200.
Manhattan V5100
As for Manhattan S6200.
Power Premium
Switch
S1
S2
S3
S4
E1
E2
E3
E4
E5
Position
Off*
On
Off
On*
Off*
On
Off
On*
In*
1-2*
In*
Out*
Out*
Function
Clear CMOS memory
Clear CMOS
Allow password
Inhibit password
Flash BIOS update
Force BIOS update
Disable video
Enable video
Reserved
Reserved
Reserved
Reserved
Reserved
Premium II ISA
Switch
S1
S2
S3
S4
S5
S6
S7
S8
Position
On*
Off*
On
Off*
Off*
On*
On*
On*
Off
Off*
On
Function
Enable VGA
Set password override
Inhibit password override
Reserved
Reserved
Reserved
Reserved
PS/2 video
AT video
VGA or fixed frequency monitors
Multi-frequency monitors
125
126
The PC Engineer’s Reference Book – Vol 2: Motherboards
Premium III 4/25s (LC2)
As for Advantage! Pro 4/25s.
Premium III 4/33(s) (LC2)
As for Advantage! Pro 4/25s.
Premium III 4/50d (King)
As for Advantage! Pro 4/100t.
Premium III 4/50d (LC2)
As for Advantage! Pro 4/25s.
Premium III 4/66d (King)
As for Advantage! Pro 4/100t.
Premium III 4/66d (LC2)
As for Advantage! Pro 4/25s.
Premium III+ P/75
As for Advantage! 6060p.
Premium III+ P/100
As for Bravo MS P/75 (Eagle).
Premium III+ P/133
As for Bravo MS P/75 (Eagle).
Premium 286
Jumper
E3
E4
E5
E6
E7
E8
E9
E10
E11
E12
Position
In
Out*
In
In
Out*
In
Out*
In
Out*
In
Out*
In
Out*
In
Out*
In
Out*
In
Out*
Function
ROM BIOS 0 wait state
Reserved
Enable A15 for 27256 devices
Reserved
27256 address F000-FFFF
Reserved
27128 address F800-FFFF
Reserved
Latched PROM BIOS
Latched PROM BIOS for optional ROMs
Reserved
0 wait state for optional ROMs
Reserved
Enable A15 for 27256 devices
Disable A15 for 27256 devices
Reserved
E000-EFFFh
Reserved
F000-F7FFh
A
Jumper
E13
E14
E18
E20
E21
E24
E25
E31
E32
E27
E28
E29
E30
Position
In
Out*
In
Out*
In
Out*
In*
Out
In
Out*
In*
Out
In*
Out
In
Out*
Out
In*
Out*
In
Out
In*
Out*
In
Function
Reserved
E800-EFFFh
Reserved
Latched PROM for optional devices
Reserved
Latched PROM for optional ROMs
AT Bus 2 wait states at 10 MHz
AT Bus 1 wait state at 10 MHz
Reserved
COM2 at 2F8h
Reserved
COM1 at 3F8h
Reserved
IRQ4
Reserved
IRQ3
Reserved
Reserved
LPT1 at 378h
Reserved
LPT2 at 278h
Reserved
IRQ7
Reserved
IRQ5
Premium 386/16
Jumper
E1,15,16
E2
E3
E4
E5
E6
E7
E8
E9
E10-13
E14
E18,32
E20,2,31
E17
E33
Position
Maths copro
5 MHz
8 MHz
In
Out*
In
Out*
In
Out*
In
Out*
Out
In*
In
Out*
In
Out*
In
Out*
In
Out*
In
Out*
Out*
In*
Out
In*
In
Function
E1
E15
E16
In
Out
In
Out
In
Out
ROM BIOS 0 wait state
Reserved
Enable A15 for 27256 devices
Disable A15 for 27256 devices
Reserved
27256 address F000-FFFF
Reserved
27128 address F800-FFFF
Reserved
Latched PROM BIOS
Latched PROM BIOS for optional ROMs
Reserved
0 wait state for optional ROMs
Reserved
Enable A15 for 27256 devices
Disable A15 for 27256 devices
Reserved
Address select
Reserved
Latched PROM for optional ROMs
Reserved
Reserved
Reserved
AT Bus 2 wait states at 10 MHz
Disable floppy
127
128
Jumper
E40
E22
E23
E28
E29
E24
E25
E26
E27
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Out*
In*
Out
In
Out*
In*
Out
Out
In*
Out*
In
Out
In*
Out*
In
Out
In*
Out*
In
Function
Enable floppy
ALE sampled earlier than standard
Reserved
COM2 at 2F8h
Reserved
COM1 at 3F8h
Reserved
Reserved
IRQ4
Reserved
IRQ3
Reserved
LPT1 at 378h
Reserved
LPT2 at 278h
Reserved
IRQ7
Reserved
IRQ5
Premium 386/C
Jumper
E1
E2
E3
E4
E5
E6
Position
In*
In*
In*
Out*
In*
Out*
Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Premium SE
Jumper
E1
E2
E3
E4
E5
E6
Position
Out*
1-2
2-3*
Out*
In*
In*
In*
Function
Reserved
Inhibit password
Set password
Reserved
Reserved
Reserved
Reserved
Premium Exec
Jumper
S1
JP1
Position
Off*
On
Out*
Function
Set password override
Inhibit password override
Reserved
Premium Workstation
Jumper
JP1-6
JP7
JP8
Position
SIMM type
256K
1 Mb
1-2
2-3
Out*
Function
JP1
JP2
1-2*
1-2*
2-3
2-3
27128K EPROM
27256K EPROM
Reserved
JP3
1-2*
2-3
JP4
1-2*
2-3
JP5
1-2*
2-3
JP6
1-2*
2-3
A
Premmia 4/33(s)
Switch
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
Jumper
E1,4,6,7
E2
E3
E5
Position
On*
Off
On
Off*
On
Off*
On
Off*
On*
Off
On*
Off
Position
E1
2-3
1-2
2-3
1-2
1-2
Function
Enable VGA
Disable
Reserved
Erase EISA CMOS at boot
Normal boot
Force flash BIOS update at boot
Normal boot
Override password
Allow password
Reserved – leave Off
Reserved – leave Off
Reserved – leave Off
Super I/O register address 398h
Super I/O register address 26Eh
Primary display colour
Mono
E4
1-2
Off
1-2
2-3
1-2
E6
1-2
2-3
1-2
1-2
1-2
On*
Off
2-3
Premmia 4/50d
As for Premmia 4/33(s).
Premmia 4/66d
As for Premmia 4/33(s).
Premmia GX P/90 (IDE)
As for Premmia GX P/90 (SCSI) except:
Jumper
E1,2
Position
E1
Off
Off
Off
On
E2
On
On
Off
On
Function
CPU speed
75 (50)
90 (60)
100 (50)
100 (66)
Premmia GX P/90 (SCSI)
Switch
1
2
Position
On
Off*
On
Function
Force flash BIOS at boot
Normal boot
Override password
E7
1-2
2-3
1-2
1-2
1-2
Function
CPU
486SX (U12)
486SX (U13)
487SX, ODP (U13)
DX, DX2, ODPR (U13)
P60 (if in J17, remove CPU in U13)
Reserved – leave Off
Enable RAM parity checking
Disable
Flash voltage – leave on 2-3
129
130
Switch
3
4
5
6
7
8
Jumper
E1,2
E3
E4
E5
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Off*
On
Off*
On
Off*
On
Off*
Off
On
Off*
On
Off*
Position
E1
Off
On
Off
On
Off
On
Off
Function
Allow password features
Mono display
Colour
Clear EISA CMOS at boot
Normal boot
Deny access to setup
Allow access
Reserved
Enable parity
Disable
Dual processor (also install E5)
Single processor (also install E4)
E2
On
Function
CPU speed
90 (60)
Clear ISA CMOS at boot
Normal boot
Single processor
Dual processor
Dual processor
Single processor
Only install E4 or E5 – see also S8.
Premmia GX P/100
As for Premmia GX P/90 (IDE).
Premmia GX P/133
As for Premmia GX P/90 (IDE) except:
Jumper
E1,2
Position
E1
On
Off
E2
On
Off
Function
CPU speed
100 (66)
133 (66)
Premmia LX P/60
As for Advantage! EXP P/60.
Premmia MTE 4/33
As for Premmia 4/33(s), except:
Switch
S7
E10
E800
Position
On
Off*
2-3
Off
Function
Deny access to CMOS setup
Allow access
Reserved
Reserved
Remove CPU from ZIF socket at U84 before installing Pentium upgrade board.
Premmia MTE 4/66d
As for Premmia MTE 4/33.
A
Premmia MTE P/60
As for Premmia MTE 4/33.
Premmia MX 4/66d
As for Advantage! Adventure 8060d except S5 is reserved.
Premmia MX 4/100t
As for Advantage! Adventure 8060d except S5 is reserved.
Premmia MX P/60
As for Advantage! 6060p.
Premmia MX P/75
As for Advantage! 6060p.
ASUS
ASUSTeK Computer Inc www.asus.com
All ID numbers (just above the memory count) contain 401A0-XXXX. A0 indicates the manufacturer,
while XXXX is the BIOS revision level.
Award BIOS ID
The last two numbers of the BIOS part number.
Code
5C
Motherboard
P/I-XP6NP5
Code
Motherboard
A7V
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Notes
Socket A
Via KT133
5 PCI
3 DIMM sockets
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
AGP
CUSL2
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium III/Celeron
933/566
Intel 815E
Award
6 PCI 2 CNR
512 Mb
PS/2 Mouse and Keyboard, 5 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Intel 815 GMCH
Good value
Notes
Socket 370
133 FSB
3 DIMM sockets
AGP Pro
131
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CUV4X
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Audio
Performance
Description
ATX
Pentium III/Celeron
800/533
Via Apollo 133A
Award
5 PCI 1 ISA 1 CNR
1.5 Gb
PS/2 Mouse and Keyboard, 4 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Crystal 4299
Good value
Notes
Description
ATX
Athlon
AMD 751/VIA VT82C686A
AMI
5 PCI/1 ISA
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Socket 370
133 FSB
3 DIMM sockets
AGP Pro
K7M
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Slot A
3 DIMM sockets
AGP
MB-586A-PCI60C
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Description
Pentium
60/66
Mercury
Award Flash
3 PCI/4 ISA
192
512 W/T
Notes
6 x 32 Mb 72-pin
256 standard
MEW
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Description
ATX
Celeron
Intel 810
5 PCI/2 ISA
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Socket 370
3 DIMM sockets
P2B
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Problems
Description
ATX
Pentium II/Celeron
500
440BX
Award 4.51PG
4 PCI/3 ISA
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Slot 1
1 shared
3 DIMM sockets
AGP
Up to 8x, but slower than Soyo SY-6BA+
Awkward jumper positions. Few features.
A
P2B-S
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Problems
Comments
Description
ATX
Pentium II/Celeron
500
440BX
Award 4.51PG
4 PCI/3 ISA
1 Gb
Notes
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Adaptec AIC-7890 LVD SCSI
AGP
Fast – better than Gigabyte GA-6BXF
Slot 1
1 shared
4 DIMM sockets
AOpen AX6B slightly slower but much cheaper
P2L97-DS
Item
Form Factor
CPU
Speeds (MHz)
Chipset
ISA
PCI
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium II x 2
550 MHz
2
4
512 Mb EDO/SDRAM
EIDE, floppy, UltraWide SCSI (AIC 7880P)
Notes
Slot 1
366 MHz for stability
3.3v only
50 and 68-pin connectors.
AGP
100 MHz, but slow.
P3B-F
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium III/Celeron
440BX
Award 4.51PG
6 PCI/1 ISA
1 Gb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Slot 1
100 FSB
1 shared
4 DIMM sockets
UDMA/33
AGP
P3C-E
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Audio
Video
Description
ATX
Pentium III/Celeron
820
Award 4.51PG
5 PCI/1 ISA/1 AMR
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Yamaha 744
Notes
Slot 1
133 FSB
1 shared
2 RIMM sockets
UDMA/33
AGP Pro
133
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P3W
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
ATX
Pentium III/Celeron
Notes
Slot 1
100 FSB
Intel 810
Award 4.51PG
6 PCI 1 AMR
3 DIMM sockets
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy, joystick, audio
UDMA/33
P5A
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium – K62
500
ALi Aladdin V
Award 4.51PG
5 PCI/2 ISA
768 Mb
512K
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Description
Full AT
2 Pentium Pro
200
Orion
AMI Flash
6 PCI/1 EISA
1 Gb
2S, 1P, IR
Notes
NCR/Symbios SCSI supported
EISA shared with Asus mediabus slot
Non-EDO. 8 sockets
P/E-P6P4S
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
Pentium
133/150/166
Orion
Award Flash
4 PCI/3 ISA
512
2S, 1P, IR, 2 EIDE
Notes
1 each shared
Non-EDO. 4 sockets
P/I-P6NP5
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Socket 7
1 shared
3 DIMM sockets
AGP
Slow – TMC T15VG+ much faster
P/E-P6RP7D
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Notes
Description
ATX
Pentium Pro
200
Natoma (440 FX)
Award Flash
5 PCI/3 ISA
256
2S, 1P
Notes
NCR/Symbios SCSI supported
1 ISA shared with Asus mediabus slot
Non-parity, parity, ECC FPM, EDO, BEDO. 4 sockets
A
135
P/I-XP6NP5
ATX version of P/I-P6NP5.
P/I-P6RP4
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium Pro
200
Mars (450 KX)
AMI Flash
4 PCI/3 ISA
512
Notes
NCR/Symbios SCSI supported
1 ISA shared with Asus mediabus slot
Non-parity, parity, ECC, either FPM or EDO
2S, 1P, IR
PVI/486AP4
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Problems
Description
Notes
486
DX4, Pentium Overdrive (P24T)
Aries
Green Award
3 PCI/3 ISA
128
256 W/B
Rev 2
NCR SCSI supported
4 x 32 Mb 72-pin SIMMs
Rev 1.6 requires reset button to reboot if you have a SCSI controller installed. May be more stable if you disable
the VL slot. Set cache timing to Normal (that is, not Fast) for stability.
PVI-486SP3
5 slightly different versions, depending on the SiS chipset:
A4
B2
B3
B4
B5
SIS 496 MU, SIS 497 MW. Supports up to PIO mode 2.
SIS 496 NU, SIS 497 NS. Supports PIO mode 3 and above, but apparently not Mode 3 very well.
SIS 496 NV, SIS 497 NS. Supports PIO mode 3 and above.
SIS 496 NV, SIS 497 NU. Supports PIO mode 3 and above.
SIS 496 OR, SIS 497 OT. Supports PIO mode 3 and above.
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Problems
Description
486
Notes
Does not work with a DX4-50/100
SiS
Award Flash
3 PCI/3 ISA/VL
128
2S, 1P, PS/2, Fl, 2 VL IDE
See below
NCR SCSI supported after v1.2
1 shared PCI/VL
Adaptec 2940UW may not work, but 2940W will. Don’t try to use v1.21 of the Adaptec BIOS. You
might also need to turn IDE prefetch off for a 3c590 PCI Ethernet adapter.
PCI/I-486 SP3G (D)
Item
CPU
Description
486
Chipset
BIOS
Green Saturn 4
Award Flash
Notes
DX4, Intel/Cyrix, P24T/D (Pentium Overdrive). Set up AMD DX4 (3x33) as non-SL enhanced DX4,
with J36 to 1&2 rather than 2&3. For AMD DX4 to run in 4x mode, pin B13 must be tied high tying to ground will make chip run as DX2-66.
4.50g
136
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Bus
Memory (Mb)
Cache (K)
I/O
Problems
Description
3 PCI/4 ISA
128
512 W/T
2S, 1P, IDE, Floppy, PS/2
Notes
1 each shared
4 sockets
256 standard
On-board NCR 53c810 SCSI with 50-pin socket. Use EIDE in slot for more than 2 drives.
On-board SCSI controller may have problems with OS/2 2.1 and a Quantum Prodrive 540S, as
synchronous communication must be disabled for the system to boot. You may also need to turn
off tagged command queueing to avoid data corruption with a Micropolis 4110
PCI/I-P54NP4
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
JP1
Description
2 Pentium
90/100
Intel 82430N (Neptune)
Flash
4 PCI/4 ISA
512
512 W/B
2S, 1P, IDE, Floppy
Position
JP1
1-2
2-3
JP2
1-2
2-3
JP5
JP 11
JP12,13
JP16
JP17
JP18
JP20
JP21
JP22,23
JP24-26
JP24-26
Open
Short
1-2*
2-3
JP12
1-2
2-3
1-2*
2-3
1-2*
2-3
Open
Short
Open*
Short
1-2*
2-3
JP22
1-2
2-3
JP24
1-2
2-3
1-2
JP24
2-3
1-2
2-3
JP13
1-2
2-3
JP23
2-3
2-3
JP25
2-3
1-2
2-3
JP25
1-2
2-3
1-2
JP26
1-2
2-3
2-3
JP26
2-3
1-2
1-2
Notes
P54C/CT. Socket 5
NCR SCSI supported
4 72-pin non-parity SIMMs
256 standard.
Function
PCI SC200 SCSI Card INT Assignment
INT A
INT B
INT C
INT D
Enable PCI SC200 SCSI Card Termination
Disable
Enable PS/2 mouse port
Disable
DMA Channel for ECP
Ch 1
Ch 2
Enable I/O
Disable
5v BIOS flash voltage
12v BIOS flash voltage
Host bus frequency 2/3 internal clock
Half internal clock
L1 cache writeback
L1 cache writethrough
CPU-PCI Bus Clock Ratio 2:1
CPU-PCI Bus Clock Ratio 3:2
L2 Cache Size
256K
512K
Clock Frequency (AV9154A-27 clock generator)
66 MHz
60 MHz
50 MHz
Clock Frequency (MX8315 clock generator)
66 MHz
60 MHz
50 MHz
IRQ Settings for Edge-Triggered Cards
Set IRQ in Setup as well. Jumpers are at the back somewhere near the centre, just behind the PCI slots.
Defaults are all at 2-3.
A
IRQ
5
9
11
14
15
PCI 1
JP2 1-2
JP1 1-2
JP3 1-2
JP4 1-2
JP5 1-2
PCI 2
JP2 3-4
JP1 3-4
JP3 3-4
JP4 3-4
JP5 3-4
PCI 3
JP9 1-2
JP10 1-2
JP8 1-2
JP7 1-2
JP6 1-2
PCI 4
JP9 3-4
JP10 3-4
JP8 3-4
JP7 3-4
JP6 3-4
Case Connectors
PCI/I-P54NP4D
As for PCI/I-P54NP4, except Dual Pentium. P54C/CT in No 1 socket, P54CM in the other, and:
Jumper
JP19
JP31
Position
1-2*
2-3
Open
Short
Function
Dual Pentium
Single pentium
Disable address pipeline
Enable
P/E-P54NP4
Item
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
JP1
JP11
JP14
JP20
JP22,23
Description
2 Pentium
Neptune
Award Flash
4 PCI/4 EISA
512
512
Position
1-2
2-3
Open
Short
1-2
2-3
Open*
Short
JP22
2-3
2-3
JP23
1-2
2-3
Notes
1 each shared
FPM, 8 banks
Asynchronous
D version has built-in I/O
Function
Power Card 1.2 3.5v (1.1 supported by default)
Power Card 1.2 3.4v
1.5x clock
2x clock
Dual CPU
Single CPU
L1 cache writeback
L1 cache writethrough
L2 cache size
256K
512K
P/I-P54SP4
Item
CPU
Speeds (MHz)
Chipset
Description
Pentium
75/90/100
SiS
Notes
older versions used the 5501/2/3; newer ones the 5511/12/13
137
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Item
BIOS
Memory (Mb)
Cache (K)
I/O
Problems
Description
Award Flash
Notes
NCR SCSI supported
4 72-pin SIMMs
1 Mb
2S, 1P, 2 EIDE, 1 Floppy
CMD 640B
Possibly disable green BIOS to boot with PCI SCSI
P/E-P55T2P4D
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
2 Pentium
200
430 HX (T II)
Award Flash
4 PCI/4 EISA/1 ISA
512
512
2S, 1P
Notes
NCR/Symbios SCSI supported
8 slots for non-parity, parity, or ECC FPM?EDO. 60 ns for 66 MHz CPUs and above.
Pipeline Burst
P/E-P5MP3
PCI/EISA. Aside from EISA slots, identical to MB-586A-PCI60C. Older versions had bugs in serial I/O.
P/I-P55SP3AV
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Description
Pentium
200
Sis
Award Flash
3 PCI/4 ISA
512
512
2S, 1P, Game
SiS 6205
ESS 1788
Notes
5511/12/13
NCR/Symbios SCSI supported
1 each shared
EDO/FPM
Pipeline Burst. 256 standard
Wavetable Upgrade
Integrated, uses up to 2 Mb System DRAM.
P/I-P55T2P4
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Description
Pentium
75-200
430 HX
Award
4 PCI/3 ISA
128
512
Notes
Trition II
NCR/Symbios SCSI supported.
1 each shared
non-parity, parity or ECC, FPM or EDO
256 standard. CELP socket for upgrade.
P/I-XP55T2P4
As for P55T2P4, but ATX.
P/I-P54TP4(D)
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Description
Pentium
75-200 MHz
Triton
Award
4 PCI/4 ISA
8-128 FPM/EDO
Notes
NCR SCSI
1 each shared
A
Item
Cache (K)
I/O
Description
256-512 Kb sync/async
IDE 0/1, Floppy, 2 serial, 1 parallel
SMC super I/O controller
Mouse port
Performance
Notes
Mode 4 data transfers and DMA mode 2. Needs triton.exe
A board equipped with 256k Burst-SRAM and EDO-RAM achieved transfer rates of 65
MB/sec to 2nd level Cache (K), 39 MByte/s on a direct Memory (Mb) access, 53 MByte/s
on a write operation (STOSD), and 54 MByte/s on a Memory (Mb) to PCI transfer.
You may need to remove old asynchronous Cache (K) before the boards recognize new
pipeline burst Cache (K). Doesn’t like RAM chips labelled Ti -60 TMS417400DJ VBP
440230.
Certain revisions do a PCI bus reset after the SCSI BIOS scans its bus, which causes
problems for QLogic SCSI controllers (ISP1020 firmware level should be 1.27 or
greater). 8-bit ISA networking cards will not work properly.
These revisions of the floppy controller (SMC 37C665IR multi-I/O chip) are defective:
Problems
B9519/5-AIC, 6J75692-1
B9519/5-AIC, 6J75693-8
B9519/5-AIC, 6J75690-5
B9519/5-AIC, 6J75697-0
B9521/5-AIC, 6J75735-7
B9521/5-AIC, 6J75730-0
B9521/5-AIC, 6J75732-5
P/I-P55TP4(D)
As for P/I-P54TP4(D)
P/I-P55TP4XE(D)
As for P/I-P54TP4(D)
P/I-P55TP4N**
As for P/I-P54TP4(D)
P/I-P55TVP4
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Intel/AMD Pentium
Notes
60 ns RAM required for CPUs with an external clock of 66 MHz
Triton III (430VX)
Award 1 Mbit flash
3 PCI/4 ISA
Up to 128 FPM/EDO parity/non-parity
256-512 Kb pipeline burst
IDE 0/1, Floppy, 2 serial, 1 parallel
Supports NCR/Symbios SCSI
1 each shared
Includes IR TX/RX header
PVI-486AP4
Rev 1.3, 1.6
Jumper
JP17
JP17(?)
JP18,19
Rev 1.6
139
Position
4-5
3-4
Open
Open
1-2
JP18
2-3,4-5
JP19
1-2,3-4
Function
2x CPU internal clock
2.5x CPU internal clock
3x CPU internal clock
CPU L1 cache writethrough
CPU L1 cache writeback
CPU type
SL Enh 486DX & ODP, DX2 & ODP, DX4 & ODP
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP18,19
Rev 1.3
Position
1-2,4-5
2-3,4-5
1-2,4-5
2-3,5-6
1-2,4-5
1-2,4-5
1-2,4-5
1-2,4-5
1-2,3-4
1-2,4-5
1-2,4-5
1-2,3-4
3-4
3-4
3-4
4-5
Function
DX & ODP, DX2 & ODP,SX, Cx486DX,DX2(-V)
SL Enhanced 486SX & SX2, Cx486s
486SX,SX2
Pentium OverDrive, P24T,P24CT,P24D
Am486DX2-66 (JP17-2 & 18-3 for 2x clock)
Am486DX2-80 (3x), Am486DX4-100(3x)
Am486DXL, Am486DX2L
Am486SXL
JP18
2-3,4-5
1-2,4-5
2-3,4-5
1-2,4-5
2-3,5-6
JP19
1-2
1-2
2-3
2-3
1-2
Cx5x86(M1sx)-133 MHz, Am5x86-P75(x5-133 MHz), AMD486DX4-SV8B(120 MHz), UMC-U5S not supported.
CPU type
SL Enh 486DX & ODP, DX2 & ODP, DX4 & ODP
DX & ODP, DX2 & ODP,SX, Cx486DX,DX2(-V)
SL Enhanced 486SX & SX2, Cx486s
486SX,SX2
Pentium OverDrive, P24T,P24CT,P24D
Am486DX2-66(2x clock), Am486SXL, Am486SX2L
Am486DX2-80(3x clock), Am486DX4-100(3x clock), Am486DXL, Am486DX2L, UMC-U5S, Cx5x86(M1sc)133MHz, Am5x86-P75(x5-133MHz), AMD486DX4-SV8B(120MHz not supported
SP97(-V)
Jumper
RTC RAM
RTCLR
FS0-3
BF0,1,2
Position
1-2*
2-3
FS0
1-2
2-3
1-2
2-3
BF0
2-3
2-3
1-2
2-3
2-3
1-2
FS1
2-3
1-2
2-3
2-3
BF1
2-3
1-2
2-3
2-3
1-2
1-2
FS2
1-2
2-3
2-3
2-3
BF2
2-3
2-3
1-2
1-2
1-2
1-2
FS3
2-3
1-2
1-2
1-2
Function
Normal
Clear CMOS
CPU host bus speed
75 MHz
66 MHz
60 MHz
50 MHz
CPU-Bus frequency A, B, C, D, E, F
-, -, -, -, 4, 1.5
-, -, -, -, 4.5, 1.5
3, 3, -, -, 3, 2.5x, 2.5, 2.5, 1,2, 2.5, 2
2x, 2, 2, 2, 2, 2
1.5x, 3.5, 3, 3, 3.5, P54C=A, P55C=B, 6x86PR=C, 6x86L-PR*=D, K6=E, 6x86L-P200+=F
VID0-2
VGA_SEL1
VGA_SEL
VGA_INT
VID0
1-2
2-3
2-3
1-2
2-3
1-2
Out*
In
1-2
2-3*
1-2
2-3*
VID2
2-3
2-3
2-3
2-3
2-3
2-3
VID3
2-3
2-3
1-2
2-3
2-3
2-3
*Only version of M1 supported is 2.7 or later. Serial number on bottom of chip
should be G8DC6620A or higher.
CPU Voltage
3.5v (VRE)
3.4v (STD)
3.2v (Dual)
2.9v (Dual)
2.8v (Dual)
2.1v (Dual)
Enable VGA
Disable VGA
Disable VGA
Enable VGA
VGA Interrupt by chipset (video capture cards)
VGA Interrupt disabled
A
VL/I-486SVG0(X4)
Rev 1.1,1.2
Jumper
RN
JP1
JP7,8
JP9
JP10
JP14,15,27
JP23-25
JP26
JP28
JP29
Position
1
2
1-2*
2-3
JP5
1-2
2-3
JP7
1-2
2-3
1-2
1-2
2-3
1-2*
JP14
Open
Open
1-2
4-5
1-2
2-3
JP23
1-2
2-3
2-3
2-3
1-2
1-2*
1-2
2-3
1-2
2-3
CPU
486SX
DX(2),487SX,ODP
SL486SX
SL486DX(2), SLOD (169 pin)
SLOD (237 pin)
P24T
P24CT56
DX4 3x clock
DX4 2.5x clock
DX4 2x clock
Cyrix CX486S
Cyrix DX/DX2
Function
30-pin memory sockets used
72-pin SIMMs only
Internal lithium battery
External lithium battery
Memory
Single-sided module in SIMM5
Double-sided module in SIMM5
CPU Type (Hardware Trap)
Intel 486SX, DX(2), SL, DX4
Cyrix S(2), DX(2), DX2-V, AMD 486D(S),XL/L2
P24D, P24T, P24CT, AMD 486D(S) X+
Cyrix CPU
Intel CPU
Enable PS/2 mouse (IRQ 12 not available) (2-3 disable)
Cache Size
128K (32K8x4)
256K (32K8x8)
256K (64K8x4)
512K (64K8x8)
512K (128K8x4)
1 Mb (128K8x8)
CPU Clock Speed
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
VESA clock delay 2-3 No delay
VL bus 0 wait state
VL bus 1 wait state
CPU external speed <=33 MHz
CPU external speed >33 MHz
JP6
1-2*
2-3
JP8
2-3
1-2
1-2
JP15
2-3
1-2
2-3
1-2
2-3
1-2
JP24
1-2
1-2
2-3
2-3
1-2
JP27
1-2
1-2
1-2
2-3
2-3
2-3
JP25
1-2
1-2
2-3
1-2
2-3
JP18
JP19
JP20
4-5
5-6
1-2
1-2
4-5
4-5
4-5
4-5
4-5
4-5
4-5
4-5
1-2,3-4
1-2,3-4
3-4,5-6
3-4,5-6
5-6
5-6
3-4,5-6
3-4,5-6
3-4,5-6
2-3,4-5
2-3,4-5
JP21
2-3
1-2
2-3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
1-2
Rev 1.5 and later
Jumper
RN
JP1
JP2-4
Position
1
2
1-2*
2-3
Function
30-pin memory sockets used
72-pin SIMMs only
Internal battery
SMI out connector
JP22
2-3
2-3
2-3
2-3
2-3
1-2
1-2,4-5
2-3,4-5
2-3,4-5
2-3,4-5
2-3
2-3
141
142
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP5,6
JP7,8
JP9
JP10
JP11
JP12
JP13
JP14,15,29
JP23
JP25-27
JP28
JP30,31
JP34
Position
JP5
1-2
2-3
JP7
1-2
2-3
1-2
1-2
2-3
1-2*
2-3
1-2*
2-3
1-2
2-3*
JP14
Open
Open
1-2
4-5
1-2
2-3
2-3
3-4
JP25
1-2
2-3
2-3
2-3
1-2
1-2*
2-3
JP30
1-2
2-3
1-2*
2-3
JP6
1-2
2-3
JP8
2-3
1-2
1-2
JP15
2-3
1-2
2-3
1-2
2-3
1-2
JP29
1-2
1-2
1-2
2-3
2-3
2-3
JP26
1-2
1-2
2-3
2-3
1-2
JP27
1-2
1-2
2-3
1-2
2-3
JP31
1-2
2-3
CPU
486SX/2/SL
DX/2,487SX,ODP,DX4 (3 x clock)
DX4 (2.5 x clock)
DX4 (2 x clock)
P24D
P24CT
P24T (237 pin SL ODP)
DX4 ODP 3x clock
DX4 ODP 2.5x clock
DX4 ODP 2x clock
AMD486SXL, SX2L
AMD486DXL, DX2L
AMD486DXL4 3x clock
AMD486DXL4 2x clock
Cyrix 486DX,DX2
Cyrix 486DX2-V (JP23 1-2,4-5)
Cyrix DX5 3x clock
Cyrix DX5 2x clock
JP18
5-6
1-2,5-6
1-2,5-6
1-2,5-6
4-5
1-2,4-5
4-5
5-6
5-6
5-6
5-6
5-6
1-2,5-6
1-2,5-6
2-3,5-6
2-3,5-6
1-2,4-5
1-2,4-5
Function
Memory
Single-sided module in SIMM5
Double-sided module in SIMM5
CPU Type (Hardware Trap)
Intel 486SX, DX(2), SL, DX4
Cyrix S(2), DX(2), DX2-V, AMD 486D(S),XL/L2
P24D, P24T, P24CT, AMD 486D(S) X+
Cyrix CPU
Intel CPU
Enable PS/2 mouse
Disable
DMA selection - reserved
Mono/VGA
CGA
Disable SMI switch (JP32) control
Enable
Cache Size
128K (32K8x4)
256K (32K8x8)
256K (64K8x4)
512K (64K8x8)
512K (128K8x4)
1 Mb (128K8x8)
Writeback L1 cache
Writethrough L1 cache
CPU Clock Speed
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
VESA clock delay
No delay
Wait state/VL bus clock
0 wait state, <=33 MHz
1 wait state, >33 MHz
Intel DX4 (3.45v)
Cyrix DX2-V (3.6v)
JP19
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
4-5
4-5
4-5
4-5
2-3,5-6
2-3,5-6
1-2,5-6
1-2,5-6
JP20
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
1-2,5-6
5-6
5-6
1-2,5-6
1-2,5-6
1-2,5-6
4-5
4-5
4-5
4-5
2-3
2-3
1-2,5-6
1-2,5-6
JP21
1-2
1-2
1-2
1-2
1-2,3-4,5-6
1-2
1-2
1-2
1-2
1-2
2-3
2-3
1-2,3-4,5-6
1-2,3-4,5-6
JP22
5-6
1-2
5-6
1-2
4-5
4-5
4-5
4-5
2-3
2-3
1-2
JP24
2-3
1-2
1-2
1-2
1-2,4-5
1-2
1-2
1-2
1-2
1-2
2-3
1-2
1-2
1-2,4-5
1-2
1-2
1-2
1-2
A
143
VL/ISA-486SV2 Rev 1.7
Jumpers marked TP are factory set and must not be changed. The defaults are given below because the
board will not work if they are in the wrong position.
TP2
Short
Jumper
BJP1
JP2
JP22
CJ1-3
CPJ1-3
CS1-3
TP5
Open
TP13
1-2
Position
Ext
Int
CGA
Mono/other
Intel
Cyrix
CJ1
2-3
1-2
1-2
CPJ1
Open
1-2
2-3
CS1
1-2
1-2
2-3
1-2
2-3
TP14
1-2
CJ2
2-3
Open
1-2
CPJ2
2-3
1-2,3-4
2-3
CS2
1-2
1-2
2-3
2-3
1-2
TP15
1-2
CJ3
Open
Short
Open
CPJ3
1-2
1-2
1-2,3-4
CS3
1-2
2-3
2-3
2-3
1-2
TP17
2-3
TP25
1D
TP26
Open
TP27
1D
Function
External battery at BCON1
Internal battery
CGA display
Mono or other display
Intel CPU
Cyrix CPU
Cache size
64K (8Kx8x8)
128K (32Kx8x4)
256K (32Kx8x8)
PGA CPU Type
486SX PGA
486DX/DX2
487SX/Overdrive/486SX-PQFP
CPU External clock speed (with clock generator)
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
VL/I-486SV2G(GX4)
Rev 2.0 and later.
Jumper
JP5,6
JP11
JP23-25
JP32,33
Position
JP5
1-2
1-2
2-3
2-3
1-2
1-2
2-3
JP23
1-2
2-3
2-3
2-3
1-2
JP32
1-2
2-3
Open
Open
CPU
AMDX4-SV8B, iDX4-EW
iDX2-&EW(P24D)
JP6
2-3
2-3
1-2
1-2
1-2
JP24
1-2
1-2
2-3
2-3
1-2
JP33
Open
Open
1-2
2-3
JP25
1-2
1-2
2-3
1-2
2-3
JP16
1-2,5-6
Function
CPU Type (Hardware Trap)
486DX24ODP,487SX,SL
486SX,DX,DX2,DX4,AM486DX4-NV8T,DX2-NV8T
Cyrix DX(2),DX2-V,DX4,5x86
AM486DXL4,DXL2,Ti486DX-G
i486DX4-&EW,P24D,P24T,AM486DX4-SV8B
Cyrix CPU
AMD/Intel CPU
CPU external clock speed
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
CPU Voltage
3.45
3.6
4
3.3
JP17
1-2,5-6
JP18
1-2
JP19
1-2,3-4,5-6
JP20
Open*
JP21
Short
JP22
1-2,4-5
144
The PC Engineer’s Reference Book – Vol 2: Motherboards
CPU
JP16
JP17
JP18
AMDX4-NV8T, DX2-NV8T
1-2,5-6
4-5
4-5
DXL4,DXL2
i486DX4ODP
5-6
1-2,5-6
1-2,5-6
iSL486SX,SX2, NonSL486SX,SX2
5-6
1-2,5-6
1-2,5-6
Cx486DX4(3.45V)
2-3,5-6
2-3,5-6
2-3
Cx286DX2-V(3.6V/4V)
Ti486DX2-G(3.45V)
Cx486DX,DX2
Cx486DX4-P/O
1-2,5-6
1-2,5-6
1-2
Cx5X86(M1sc)
iSL(NonSL)486DX,DX2
1-2,5-6
1-2,5-6
1-2,5-6
iSL(NonSL)487SX,ODP
i486DX4
P25T & 237-Pin SL ODP
4-5
1-2,5-6
5-6
AM5x86-P75(x5-133MHz)
1-2,5-6
1-2,5-6
1-2
Cx5x86(M1sc)-133MHz
1-2,5-6
1-2
1-2,5-6
* Open (3x) 1-2 (2x) 5-6 (2.5x) **Open (3x) 1-2 (4x) ***Open (3x) 2-3 (2x) ****open DX/2
JP19
Open
JP20
4-5
1-2
1-2
2-3
Open*
Open
2-3
1-2,3-4,5-6
Open*
Open
1-2
1-2
Open*
Open
1-2
1-2
1-2,3-4,5-6
1-2,3-4,5-6
Open
Open**
Open**
2-3
2-3
Open
1-2
1-2,4-5
1-2
VX97
Jumper
BBLKW
JP 1
FS0-2
BF0,1
Position
1-2
2-3
Closed*
FS0
1-2
2-3
1-2
2-3
2-3
BF0
1-2
1-2
2-3
2-3
1-2
FS1
2-3
1-2
2-3
2-3
2-3
BF1
1-2
2-3
2-3
1-2
1-2
Function
Disable Boor Block Programming
Enable
Reserved – Battery Test Jumper
CPU Ext Clk
75 MHz
66 MHz
60 MHz
55 MHz
50 MHz
Frequency Ratio
3.5
3
2.5
2
1.5
FS2
1-2
2-3
2-3
1-2
2-3
Astar
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9
Motherboard
P55-SA
Code
AC
Motherboard
P55-TH
P55-TH
Epox P55-TH
AT&T
See also Olivetti
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
Motherboard
1455
Code
1-00
Motherboard
GIS Globalyst 330-360
JP21
Open
***
Open
Open
1-2
****
JP22
1-2,4-5
1-2
2-3
1-2
A
145
1455
Same as Mitac LH4077C?
ATC
www.atc.co.jp
See A-Trend
ATI
SX
Requires BIOS upgrade for Windows enhanced mode. J8 & J9 to 32K page memory allocation, not 16K.
Atima Technology
See Gemlight www.atima.com
ATL
Yukon HX
Rev 2.0 and later.
Jumper
JP9, J31
JB2,3
J2,3,4
JB1
J5
J8
J11
Position
JP9
On
Off
JB2 All on
JB3 All on
J3
On
On
Off
Off
1-2, 3-4
3-5, 2-4
1-3, 4-6
3-5, 4-6
Close
Open
In
Out
1-2
2-3
J31
On
Off
J4
On
Off
On
off
J2
x
1-2
2-3
x
Function
(JP9 5-6, 7-8)
P54
P55
5v DRAM Power
3v DRAM Power
CLK
50
60
66
RS50
1.5x CPU
2
3
2.5
CLK/4
CLK/3
Clear CMOS
Normal
PNP
Non PnP
A-Trend
www.a-trend.com
Award BIOS ID
The last two numbers of the BIOS part number.
146
The PC Engineer’s Reference Book – Vol 2: Motherboards
Code
1-00
4C
9C
9C
Motherboard
ALI 1762 or 1442G
ATC 1000
ATC 1000/2000/5000
ATC 1020
Code
AC-00
BC-00
H
HC-00
Motherboard
ATC 5000
ATC 1425B
ATC 1425B
ATC 1425A
ATC 1000+
430VX. Aka Fugutech M 507
Jumper
JP3,4
JP5
JP6
JP8,9
Position
JP3
Open
Close
Close
Open
1-2
3-4
1-2
3-4
5-6
7-8
9-10
1-2
2-3
JP8
1-2
1-2
2-3
2-3
JP4
Open
Close
Open
Close
JP9
1-2
2-3
2-3
1-2
Function
Host clock
50 MHz
55 MHz
60 MHz
66 MHz
VRE CPU voltage (3.4-3.6v)
STD CPU voltage (3.31-3.6v)
3.5v CPU core
3.3v CPU core
2.9v CPU core
2.8v CPU core
2.7v CPU core
Single voltage CPU (P54C, 6x86, K5)
Dual Voltage (P55C)
Clock multiplier
1.5x
2x
2.5x
3x
ATC 5000
430VX
Jumper
JP2
JP3
JP6
Position
2-3,4-5
2-3,5-6
1-2,5-6
1-2,5-6
1-2,4-5
2-3,4-5
1-2
3-4
1-2
3-4
5-6
7-8
9-10
Function
2x
2.5x
3x
60 MHz host clock
66 MHz host clock
75 MHz host clock
VRE CPU voltage (3.4-3.6v)
STD CPU voltage (3.31-3.6v)
3.5v CPU core
3.3v CPU core
2.9v CPU core
2.8v CPU core
2.7v CPU core
Unable to verify core voltages!
ATC 6220
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
ATX
Pentium II/Celeron
500
440BX
Award 4.51PG
4 PCI/3 ISA
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Notes
Slot 1
1 shared
3 DIMM sockets
A
Item
Video
Performance
Comments
Description
Notes
AGP
Good, but SuperMicro P6SBA is faster
133 MHz bus – stable when overclocked
ATC 6254M
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Description
ATX
Pentium II/Celeron
Notes
Slot 1
440BX
Award 4.51PG
4 PCI/2 ISA
1 Gb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
3Dfx Voodoo3 2000 (16 Mb)
Yamaha YMF740C
FW-6280BXDR/155
Item
Form Factor
CPU
Cache
Chipset
Bus
Memory (Mb)
I/O
Video
Comments
Description
ATX
Pentium II
Notes
SMP Slot 1
Intel 440BX
6 PCI
768 Mb
2 EIDE, floppy USB, IR
3 DIMM sockets
AGP 2x
SuperMicro P6DGU is better
Attractive Computer Technology
Auhau Electronics (Sukjung)
www.computersources.com.hk/auhau
AVT Industrial
Formerly Concord
Azza
www.azzaboard.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0C-00
2C
9C
9C-00
AC-00
1 shared
4 DIMM sockets
Motherboard
4SIG
4SPI
PT 51H
PT 51V
PT 5IS/VL
Code
BC-00
DC-00
EC-00
FC
Motherboard
PT 51V
5IW
PT 5IV
PT 5IVH
147
148
The PC Engineer’s Reference Book – Vol 2: Motherboards
4SIG
Same as Kaimei KM-S4-1 PCI rev 5.1 or Rectron RT 4S3
B
BCM
BCM Advanced Research Inc, or GVC www.bcmgvc.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
A
AC
AC-00
BC
DC
Motherboard
SQ 599
SQ 593 or 594
SQ 599/P54SB
SQ 576
SQ 591 or 594
Code
HC
HC-00
IC
KC
Motherboard
SQ 595
LX 770 486 PCI
SQ 595/575
FR 550
BCOM
Bek-Tronic
See also Bestkey
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC-00
Motherboard
BEK P405
Code
Motherboard
Bestkey
See also BEK-Tronic
Award BIOS ID
The last two numbers of the BIOS part number.
150
The PC Engineer’s Reference Book – Vol 2: Motherboards
Code
CC
Motherboard
5725
Code
Motherboard
Biostar
www.biostar-usa.com www.biostar.com.tw www.biostar.net
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
3
8
8C-00
9C
9C-00
Motherboard
MB 1566PAT-B VIP
MB 8433/40 UUC
MB 8433UUD-A v3.1
MB 8433UUD
MB-8500TEC
M5ATA
Code
A-00
B(C)
BC
DC
YC-00
Motherboard
MB 8500 URC
MB 8500SAC
M6TBC (BX)
M6TLC (LX)
MB 8433 /40 /50UUC-A v2.1
8433UUD
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Performance
Problems
Comments
Description
AT
486
25, 33 or 40
UMC 888X
Award
3 PCI/4 ISA
Notes
2S, 1P, PS/2
May not use 3 parallel ports. May be problems with built-in PS/2 mouse.
Including AMD 5x86/P75
PCI bus can use 25, 26.67 or 33 MHz
72-pin only. Will use EDO with the UUD960326I BIOS. May not like TI memory.
May not be able to use more than PIO Mode 3, despite BIOS
Also known as Quantex MBD-4PB2 or 4MB2
CPU Selection
CPU Speed Selection
Cache (K) Selection
Flash ROM Selection
DMA Channel Selection
JP16, JP37, JP39, JP45, JP46, RN11-15
Remove JP15 for 40 MHz.
JP5, 6, 7
J13, Intel (12 v) or SST (5 v).
JP8, 9
8500TVX
Jumper
JP3
JP4
JP5
JP8-9
Position
1-2
2-3
Open
Closed
3-4
1-2
1-2.3-4
Both Open
JP8
Open
Open
Closed
Closed
Open
JP9
Open
Closed
Closed
Open
Open
Function
5v Flash ROM
12v Flash ROM
Normal
Clear CMOS
66 MHz bus clock
60 MHz
50 MHz
55 MHz
Clock Multiplier
1.5
2*
2.5
3
3.5
v2.3 + - otherwise both open
B
Jumper
JP6, 11
JP7
JP12
JP14
Position
JP6
1-2
2-3
Open
Closed
Open
Closed
Open
Closed
JP11
1-2,3-4
open
151
Function
CPU Type
Single Voltage
Dual Voltage
256K cache
512K cache
3.5v CPU (VRE)
3.45v CPU (Std & VR)
2.9v (Dual Voltage CPU)
2.6v
Password recovery: Power off – Close JP4 – Power On, then off after memory count. Open JP4 – Power On
– reset password
M6TBA
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Comments
Description
ATX
Pentium II/III
440BX
Award
4 PCI/3 ISA
768 Mb
Notes
Slot 1
3 DIMM sockets
2S, 1P, PS/2, USB, EIDE
AGP
Supermicro P6SBA a better choice
M6TWC
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
Micro-ATX
Celeron
Intel 810
Notes
Socket 370
3 PCI
512 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
onboard
M7MKA
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Athlon
AMD 751/756
Award
5 PCI/2 ISA
768 Mb
2 EIDE, floppy
AGP
Notes
Slot A
UDMA/66
3 DIMM sockets
2x
Bioteq
European name for Biostar. www.bioteq.com
BJMT Technology
www.bjmt.com
2 DIMM sockets
152
The PC Engineer’s Reference Book – Vol 2: Motherboards
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC
Motherboard
Nimble VX
Code
BC
Motherboard
Nimble Triton-III VX
82430VX
Same as FYI 82430VX P55C
Jumper
JP1,2
JP7-9
17-18
JP8
JP12,13
J14,15
JP19,20
JP26
Position
JP1
1-2
2-3
JP7
1-2
1-2
2-3
2-3
2-3
1-3,2-4
3-5,4-6
JP12
On
Off
Off
On
J14
1-2
1-2
2-3
JP19
Off
On
On
Off
1-2,3-4
1-2
3-4
All off
JP2
1-2
2-3
JP9
2-3
2-3
2-3
2-3
1-2
JP17
2-3
2-3
2-3
2-3
2-3
JP13
On
Off
On
Off
J15
1-2
2-3
2-3
JP20
Off
Off
On
On
JP18
1-2
1-2
1-2
1-2
2-3
Function
IR function
COM2
IR
Cache size
256K (onboard)
256K (module)
512K (onboard)
512K (module)
512K (onboard + module)
5v DIMM
3.3v DIMM
Host bus clock
50 MHz
55 MHz
60 MHz
66 MHz
BIOS type
EPROM
5v Flash
12v flash
Clock multiplier
1.5x
2x
2.5x
3x
3.3v CPU
3.45v CPU
3.52v CPU
3.6v CPU voltage
Nimble Triton-III VX
FYI board.
Bluepoint Technology
BMA
USA name for Biostar.
Brother
BC 3286
Jumper
J9,26
SW2-1
Position
J9
In
Out
J26
In
Out
SW2-1
Off
Out
Function
Display
Onboard Mono
External
B
Jumper
J13
J17
J18
J19
SW1
SW2
Position
1-2
2-3
1-2
2-3
In
Out
Function
RAS delay 100ns
RAS delay 80ns
1.5ns RAS via F08 delay
2.2ns RAS via F08 delay
Turbo mode
Normal ops
Reserved
512K base memory
640K base memory
1 Mb base memory
Enable COM2
Enable LPT
Enable COM1
3-4
2-3
4
1
2
3
BC 3386sx
Jumper
J1
J8
J12
J20
J21
J22
J23
J25
J31,32
J33
J36
Position
In
1-2
2-3*
In*
1-2
2-3
1-2
4-2
3-4
1-6*
2-5*
3-4*
1-2
2-3
Out
In*
1-2
2-3*
Out*
In
1-2
Function
80387sx installed
27512K BIOS size
27256K BIOS size
External delay for timing
Access time 85ns
Access time 90ns
Enable IRQ9
44256 in U39, U57 for 256K memory
44256 in U39, U38 & U52 for 512K memory
Enable COM2
Enable LPT
Enable COM1
256K DRAM clock select
512K DRAM clock select
Normal ops
Turbo
Reserved
Non-interlaced monitor
Interlaced monitor
VGA 16-bit data path
VGA 8-bit data path
BC 5386sx
Jumper
JP2
JP4,5
JP6
JP10
JP11
JP102
Position
1-2
2-3
DRAM type
100 ns FPM
100ns FPM
All 100 ns
120 ns
1-2
2-3
1-2
2-3
In
Out*
1-2
2-3
Function
512K BIOS size (27512 x 2)
256K BIOS size (27256 x 2)
JP4
JP5
Wait state
1-2
1-2
0 or 1
1-2
2-3
0 or 1
2-3
1-2
1 or 2
2-3
2-3
2 or 3
CGA display
Mono display
ROM type 512K (27512)
ROM type 256K (27256)
Copro clock asynchronised
Copro clock synchronised
Power good signal from power supply
Power good signal by main board
153
154
The PC Engineer’s Reference Book – Vol 2: Motherboards
BC 5386dx
Jumper
JP1
JP3
JP5
JP6
JP8
Position
In*
Out
1-2
2-3
1-2
2-3
1-2*
2-3
In*
Out
Function
Colour display
Mono display
27512K BIOS size
27256K BIOS size
80ns DRAM
100ns DRAM
Copro not installed
Copro installed
High speed
Low speed
SW1
S2
S3
S6
S7
S8
Bank 1
Bank 2
Bank 3
Bank 4
Off
Off
Off
Off
Off
256Kx9
Off
On
Off
Off
Off
256Kx9
Off
On
On
Off
Off
256Kx9
256Kx9
Off
On
On
On
Off
256Kx9
256Kx9
256Kx9
On
Off
Off
Off
Off
On
On
Off
Off
Off
1 Mbx9
On
On
On
Off
Off
1 Mbx9
1 Mbx9
On
On
On
On
Off
1 Mbx9
1 Mbx9
1 Mbx9
When S8 is On, only 14 Mb is detected. The additional 2 Mb is for add-On cards with their own memory.
Bull
APW
Jumper
J5
J7
J07
J10
J14
Position
In
1-2*
2-3
1-2
2-3*
1-2*
2-3
Out
J16
Function
Disable HD
Reserved
Onboard battery
External battery
5¼” and 3½“ floppies
3½“ floppy only
Mono display
Colour display
Display card in 16-bit slot
Reserved
AP-M45/Micral 45
Jumper
SWD1
JDO1
Position
Display
Mono
Colour
EGA
Function
1-1
Off
On
Off
1-2
Off
Off
On
SW1
Switch
1,2
3
4
Position
Memory
640K
1152K
Bank 2=2 Mb
Extended memory
On
Off
Jumper
S1
S2
On
Off
Off
Off
On
On
Off
Off
Reserved
Add-On Mono
Add-On CGA
1-3
Off
Off
On
1-4
Off
Off
Off
JDO1
2-3
2-3
1-2
Total
1 Mb
2 Mb
3 Mb
4 Mb
4 Mb
8 Mb
12 Mb
16 Mb
B
Switch
5
6,7,8
Position
Off
Jumper
Enable video
Reserved
Switch
1
2
3
4
Position
Off*
Off*
On*
On
5
Off*
On
Off*
On*
Off*
Off*
On*
Function
Enable mouse
Disable mouse IRQ5
Enable mouse IRQ3
CP8 interface address 0370-0377h
Parallel address 278-27Fh
Serial address 2F8-2FFh
SCSI address 320-327h
SCSI address 328-32Fh
Enable SCSI IRQ7
Enable SCSI IRQ15
Enable parallel IRQ5
Enable parallel IRQ7
Enable IRQ3 CP8 interface
SW2
6
7
8
9
10
BM 200
JMP1
Jumper
ST11
ST5
ST2
ST3
ST7
ST8
ST9
ST4
Position
Out
In
Out
In
In
In
Out*
Out
Function
27256 EPROM-1 (170ns) 2 WS
8 MHz bus
RAM: 1 WS
ROM: 2WS
1 Mb DRAM 120ns
4 x 256 x 9
Fast mode
JMP2
Jumper
ST34
ST35
ST48,49
Position
In
In
CTS
CP8-CP8
ST50,51
DSR
CP8-CP8
ST52,53
RXD
CP8-CP8
Function
Precomp 187 ns
DRQ2 sent (DMA for floppy)
ST48
ST49
Out
In
In*
Out*
ST50
ST51
Off
On
On*
Off*
ST52
ST53
Out
In
In*
Out*
JMP3
Jumper
ST30
ST29
ST27
ST26
ST32
ST31
ST28
ST33
Position
In
In
In
In
In
In
In
In
Function
HDCS1 1F0-1F7h
HDCS2 3F6-3F6h
SERICS (COM2-CP8) 2F8-2FFh 390-397h 370-377h
SEROCS (COM1) 3F8-3FF
FLPCS3 (floppy) 3F7h
FLPCS2 (floppy) 3F2h
PRTCS (parallel) 278-27Fh, 378-37Fh
FLPCSI (floppy) 3F4h/3FS
155
156
The PC Engineer’s Reference Book – Vol 2: Motherboards
JMP4
Jumper
ST10
ST38
ST43
ST13
ST47
ST46
ST24
ST25
Position
Out
In*
In
In
In
Out*
In
In
Function
DRAM 120/150ns
Position
Out*
Function
Out
Out*
Out
Out*
In
In
Out
In
In
In
In
In
In
Out
In
In
In
Out*
In
Out
Reserved
VGA DRAM memory selected – off for EGA
VGA I/O selected
IRQ7 selected
2F8-2FFh V24 (9 pin)/CP8
3F8-3FFh V24 SEROCS
378-37Fh PARALL-PRTCS
JMP5
Jumper
ST22
ST19
ST18
ST20
ST21
ST56
ST6
ST12
ST14
ST15
ST16
ST17
ST36
ST37
ST40
ST41
ST42
ST44
ST45
ST54
ST55
VGA
48 MHz system clock connected
Colour display
Mono display
14.832 MHz clock connected
36 MHz VGA clock
25.175 MHz VGA clock
28.322 MHz VGA clock
16 MHz clock
9.6 MHz floppy interface
Link from P6 mechanical grd to 0v not established
MEMCS16 disabled (no video 16-bit access)
IOCHRDY (HD connected)
IRQ14 only
Power supply +5v
Serial/parallel I/O address
For non-VGA monitors, remove JMP4 ST13 and 43 and add JMP5 ST23 and 21. Add ST21 for Mono.
EP Main Logic
Jumper
W2
U158
U173
Position
Video
Enable
Disable
Memory
256K
512K
640K
Bank Address
C0000-C3FFF
C4000-C7FFF
C8000-CBFFF
CC000-CFFFF
D0000-D3FFF
D4000-D7FFF
D8000-DBFFF
DC000-DFFFF
E0000-E3FFF
Function
1
Off*
On
S1
On
On
Off*
S1
On
On
On
On
On
On
On
On
Off
2
Off*
On
S2
On
Off
Off*
S2
On
On
On
On
Off
Off
Off
Off
On
3
Off*
On
S3
Off
Off
Off*
S3
On
On
Off
Off
On
On
Off
Off
On
4
On*
Off
S4
On
Off
On
Off
On
Off
On
Off
On
5
On*
Off
6
On*
Off
B
Jumper
U178
1
2
3
4
5,6
Position
E4000-E7FFF
E8000-EBFFF
EC000-EFFFF
Disabled
On*
Off
On*
On*
On*
Off
Video
Not used
80x25 colour
40x25 colour
Mono
Function
Off
On
Off
On
Off
On
Off*
Off*
8087-2 not installed
8087-2 installed
Reserved
Enable Onboard HD
One floppy
Two floppies
6
On
On
Off
On
On
Off
Off*
Off*
On
Off
Off
Off*
Off
On
Off
Off*
Micral 600
Jumper
SW1
SW2
S1
S2
S3
S4
S5-7
S8
S9
S10
JP6-8
JP12
JP13-16
Position
On*
On*
Off
Off*
Off*
Off*
Printer port
LPT1
LPT2
On
Off*
On
Off*
On*
Maths copro
80387 installed
Not installed
1-2*
RAM
Type
2 Mb
512x9
4 Mb
512x9
6 Mb
512x9
1Mx9
4 Mb
1Mx9
8 Mb
1Mx9
Block
A
A&B
A
B
A
A&B
SP-16 Processor Card
Jumper
S1
SW2-1
SW2-2
SW2-3
SW2-4
SW2-5
SW2-6
SW2-7
Position
1-2*
2-3
On*
Off*
Off*
Off*
Off*
Off*
Off*
Function
Colour display
Mono display
80387 installed
Reserved
Video DMA
NMI failsafe timer disabled
INT 10 not selected
INT 11 not selected
INT 12 not selected
Function
Sets EPROM and I/O recovery delay
25 pin=COM1 * 9 pin=COM2
9 pin=COM1 * 25 pin=COM2
Enable COM1
Enable COM2
Enable LPT1
S5
S6
S7
Off
Off
On*
On
On
Off
ROM BIOS
BIOS in RAM
Primary display CGA
Primary display Mono
Enable 2nd SIMM block (B)
JP6
JP7
JP8
2-3
2-3
2-3
1-2
1-2
1-2
Relocate RAM at 0A0000-0Dffff to FA0000-FDFFFF
JP13
JP14
JP15
JP16
2-3
2-3
1-2
1-2
2-3
2-3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
2-3
2-3
2-3
157
158
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
SW2-8
Position
On
Off
Function
Normal system speed during floppy access
Emulate 8MHz during floppy access
SP-SX V16 Processor Card
Jumper
S1
S2
S3-1
S3-2
S3-3
S3-4
S3-5,6,7,8
Position
1-2*
2-3
1-2*
2-3
Out*
In
Out*
In
Out*
In
Out*
Memory
Deselected
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Function
Colour display
Mono display
16 MHz CPU
8 MHz CPU
4 wait states
3 wait states
Autoswitch mode
8 MHz mode
0-512K
0-256K
512K-1Mb enabled
Mapping Area
100000-160000
200000-260000
300000-360000
400000-460000
500000-560000
600000-660000
700000-760000
800000-860000
900000-960000
A00000-A60000
B00000-B60000
C00000-C60000
D00000-D60000
E00000-E60000
F00000-F60000
S5
In
Out*
In
Out
In
Out
In
Out
In
Out
In
Out
In
Out
In
Out
SP-20 Processor Card
Jumper
S1
SW2-1
SW2-2
SW2-3
SW2-4
SW2-5
SW2-6
SW2-7
SW2-8
Position
1-2*
2-3
On*
On
Off
Off
Off*
Off*
Off*
On
Off
Function
Colour display
Mono display
80387 installed
Auxiliary Input Device port enabled
Video RAM shadowed
NMI failsafe timer disabled
INT 10 not selected
INT 11 not selected
INT 12 not selected
Normal system speed during floppy access
Emulate 8MHz during floppy access
S6
In
In*
Out
Out
In
In
Out
Out
In
In
Out
Out
In
In
Out
Out
S7
In
In*
In
In
Out
Out
Out
Out
In
In
In
In
Out
Out
Out
Out
S8
In
In*
In
In
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
C
Caliber Computer Corp
www.calibercorp.com
California Graphics & Peripherals
www.californiagraphicsusa.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
LC-00
Motherboard
Sunray VIA
Sunray II Pro rev A1
Code
TC
Motherboard
Sunray II Pro rev D
Sunray II Pro
Rev A1 - Soyo 5TC2? Rev D – Wintec MP064?
Sunray VIA
Epox P55-VP
ChainTech
ELT www.chaintech.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0
1-00
Motherboard
486SLB
5UBM or 4SLE
Code
A
AC-00
Motherboard
Chaintech 5SEM
5HTM rev M101/586SEM
160
The PC Engineer’s Reference Book – Vol 2: Motherboards
Code
2-B2
9C
9-01
9C-00
9C-01
9C
Motherboard
486SPM
6BTM (BX)/ 6LTM (LX)/5IFM
5SBM2
5SEM M102
5IDM2 M105 (FX)
5VGM/5IFM/5IGM M 101
Code
AC
BC
C-00
DC
I
Motherboard
586IEM/0/0.1
5IEM
486SPM M1.02
6FTM
486SPM
CT-3AGM2
Item
Form Factor
CPU
Cache
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium/K6
512 Kb
Via MVP3
3 PCI/3 ISA
768 Mb
2 EIDE, floppy USB, IR
Notes
Super Socket 7
UDMA/33
3 DIMM sockets
AGP 2x
CT-5AGM2
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
Baby AT
Pentium
550
VIA MVP3
Notes
4 PCI/3 ISA
384
512
2 EIDE, floppy, USB
1 shared. 100 MHz bus speed
3 DIMM sockets
Socket 7
AGP
About average
CT-6AJA4
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Audio
Description
ATX
Pentium III/Celeron
733/700
VIA Apollo Pro 133A
Award
5 PCI 1 ISA 1 ANR
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
CMedia 8738
CT-6ATA2
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II
VIA Apollo Pro Plus
4 PCI/2 ISA
768 Mb
2 EIDE, floppy, USB
Notes
Slot 1
1 shared UDMA/66
3 DIMM sockets
AGP
Notes
Socket 370
133 FSB
UDMA 66
3 DIMM sockets
AGP
C
CT-6ATA4
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
ATX
Pentium III
Via Apollo
5 PCI/1 ISA/1 AMR
768 Mb
Notes
Slot 1
1 shared UDMA/66
3 DIMM sockets
2 EIDE, floppy, USB
AGP
CT-6BDU
Essentially jumperless except for clock frequency and keyboard power-on.
Item
Description
Notes
Form Factor
ATX
CPU
Dual Pentium II
Slot 1
Speeds (MHz)
450
Chipset
440BX
Bus
4 PCI/3 ISA
112 MHz bus speed
Memory (Mb)
4 DIMM sockets
I/O
2 EIDE, floppy, USB
Ultra 2 SCSI with RAIDport III on board
Video
AGP
CT-6BTA3
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
Comments
Description
ATX
Pentium II
440BX
4 PCI/2 ISA
1 Gb
Notes
Slot 1
1 shared
4 DIMM sockets
2 EIDE, floppy, USB
AGP
CT 6ATA2 is cheaper with faster EIDE
CT-6BTM
Essentially jumperless except for clock frequency and keyboard power-on.
Item
Description
Notes
Form Factor
ATX
CPU
Pentium III/Celeron
Slot 1
Speeds (MHz)
800/533
Chipset
440BX
BIOS
Award 4.51PG
Bus
4 PCI/3 ISA
1 shared. 133 MHz bus speed
Memory (Mb)
1 Gb
4 DIMM sockets
I/O
2 EIDE, floppy, USB
Video
AGP
Performance
Slow-Good – similar to Soyo SY-6BA+
CT-6ESA2
Essentially jumperless except for clock frequency and keyboard power-on.
Item
Form Factor
CPU
Description
ATX
Pentium II/Celeron
Notes
Slot 1
161
162
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Description
333
440EX
2 PCI/2 ISA
256
Notes
1 shared. 83 MHz bus speed
2 DIMM sockets
2 EIDE, floppy, USB
AGP
Stereo audio
CT-6ESV
Essentially jumperless except for clock frequency and keyboard power-on.
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Description
ATX
Pentium II/Celeron
333
440EX
2 PCI/2 ISA
256
Notes
Slot 1
1 shared. 83 MHz bus speed
2 DIMM sockets
2 EIDE, floppy, USB
Rage II-C 4 Mb
Stereo audio
AGP
CT-6LTM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Comments
Description
ATX
Pentium II
375 MHz
440 LX
Notes
4 PCI/3 ISA
384 Mb SDRAM
768 Mb EDO
2 EIDE, floppy
1 each shared
3 DIMM sockets
Slot 1
AGP
Fast
Almost identical to QDI Legend. Jumperless.
CT-6OJV2
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Description
ATX
Pentium III/Celeron
1000/733
Intel 815E
Award
6 PCI 1 CNR
512 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
Intel 815 GMCH
CMedia 8738
CT-6WIV
Item
Form Factor
CPU
Chipset
Description
Micro-ATX
Celeron
Intel 810
Notes
Socket 370
Notes
Socket 370
150 FSB
UDMA 100
3 DIMM sockets
AGP
C
Item
Bus
Memory (Mb)
I/O
Description
3 PCI
512 Mb
2 EIDE, floppy
Notes
UDMA/66
2 DIMM sockets
CT-6WSV2
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Description
Micro-ATX
Celeron/PII
Intel 810E
3 PCI
512 Mb
2 EIDE, floppy, USB
Notes
Slot1
UDMA/66
2 DIMM sockets
Embedded 3D AGP
Chaplet
Chicony
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
1-08
4-01
Motherboard
CH 471B
C471
CH 881A
Code
H-00
H-02
HC
Motherboard
CH 880C
CH 890A
CH 880C
CH-471A
Jumper
JP7
JP8,12,13
JP1,JP2-5
14,16
JP 32,34,
35
JP40
JP44
JP47
Position
1-2
2-3
JP8
Out
Out
In
Out
In
JP1
1-2,3-4
2-3,4-5
1-2,3-4
2-3,4-5
1-2,3-4
2-3,4-5
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JP12
Out
Out
In
In
Out
JP2
2-3
1-2
2-3
1-2
2-3
1-2
JP13
Out
In
In
In
Out
JP3
1-2
1-2
2-3
2-3
2-3
2-3
JP4
1-2
2-3
2-3
2-3
2-3
2-3
JP5
1-2
1-2
1-2
2-3
2-3
2-3
JP14
1-2
1-2
1-2
1-2
2-3
2-3
JP16
1-2
1-2
2-3
2-3
2-3
2-3
Function
Normal
Clear CMOS
CPU Speed
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
Cache Size
32K
64K
128K
256K
512K
1 Mb
5v CPU (P24C/T)
3.3v CPU
Normal
Address Strobe Delay
VESA 0 wait
VESA 1 wait
VESA <= 33 MHz
VESA >33 MHz
163
164
The PC Engineer’s Reference Book – Vol 2: Motherboards
JP
SX
DX
P24T
SX-SL
DX”-SL
DX-SL
M6
20
2-3
1-2
1-2
2-3
1-2
1-2
2-3
21
Out
In
In
Out
In
In
Out
29
2-3
2-3
1-2
2-3
2-3
2-3
2-3
31
Out
3-4
2-3
Out
3-4
3-4
Out
Cyrix DX/2
1-2
In
2-3
3-4
P24D
1-2
In
1-2
3-4
P24C
AMDX
1-2
1-2
In
In
2-3
2-3
3-4
1-2
25
Out
Out
3-4
3-4
3-4
3-4
2-3
4-5
2-3
23
Out
Out
Out
1-2
1-2
1-2
Out
24
Out
Out
1-2
4-5
4-5
4-5
2-3
11
2-3
2-3
1-2
2-3
2-3
2-3
1-2
10
1-2
1-2
1-2
1-2
1-2
1-2
2-3
30
Out
Out
1-2
Out
Out
Out
2-3
33
Out
Out
1-2
Out
Out
Out
2-3
36
Out
Out
1-2
1-2
1-2
1-2
1-2
28
Out
Out
Out
Out
Out
Out
Out
27
Out
Out
Out
Out
Out
Out
Out
2-3
1-2
2-3
2-3
2-3
1-2
Out
Out
2-3
26
Out
Out
2-3
2-3
2-3
2-3
1-2
3-4
1-2
3-4
2-3
1-2
3-4
3-4
Out
4-5
2-3
1-2
Out
Out
1-2
In
In
1-2
Out
2-3
Out
4-5
Out
2-3
2-3
1-2
1-2
Out
3-4
Out
Out
1-2
2-3
Out
Out
Out
Out
Out
Clevo
Commate
www.tcommate.com.tw
Compaq
www.compaq.com
DeskPro
Jumper
1
2
3-4
Position
Off
Off
3
On
Off
Off
On
4
Off
Off
On
On
5,6
5
Off
Off
On
On
6
Off
On
Off
On
7
On
Off
On
8
Function
Always Off
8 MHz Maths copro installed
Memory (Kb)
128
256
512
640
Video adapter
Mono
CGA 40 x 25
CGA 80 x 25
With own BIOS
1 floppy
2 floppies
Always On
DeskPro v2/8MHz
Jumper
1
2,3
4,5
Position
Off
On
2
On
On
Off
Off
3
On
Off
On
Off
4
On
On
Off
Off
5
On
Off
On
Off
Function
256K X 1 DRAM
64K X 1 DRAM
Memory (Kb)
Both
0-256
0-512
All memory
Extended Memory
None
1.5 Mb
Bank 2-1; 256K DRAM
1-2 Mb
Bank 2/3; 256K DRAM
64K DRAMs
C
Jumper
Position
6
On
Off
Off
On
Off
7
8
165
Function
64K DRAMs
6 MHz only
6 or 8 MHz
Always Off
Compaq or EGA monitor
Non-Compaq monitor
DeskPro 286 Version 1
Switch
1
2
Position
Off
On
Off*
3
On
Off
Off
On
3,4
5,6
5
On
Off
On
Off
On
Off
7
4
Off
Off
On
On
6
On
On
Off
Off
8
Function
Always Off
8 MHz 8087-2 not installed
Coprocessor installed
Memory (Kb)
128
256
512
640
Display
80 x 25 EGA, or RGBI
40 x 25 COMPAQ VDU*
80 x 25 COMPAQ VDU
720 x 350 Monochrome
1 floppy
2 floppies
Always On
*Rev F or later ROM
System Memory Board
Jumpers are etched on the solder side (bottom) of the board. Cut the conductor to disconnect any
unwanted jumpers, then solder the wire(s) to jumpers as desired. Modifying these jumpers invalidates the
warranty.
ROM Set 1
Jumper
E7-E8 E10-E11
E8-E9 E10-E11
E7-E8 E11-E12
E8-E9 E11-E12
E7-E8 E10-E11
E8-E9 E10-E11
E7-E8 E11-E12
E8-E9 E11-E12
E13-E14
E13-E14
E13-E14
E13-E14
E14-E15
E14-E15
E14-E15
E14-E15
Function
8K x 8, Static ROM, 250 ns
16K x 8, Static ROM, 250 ns*
Invalid
32K x 8, Static ROM, 250 ns
8K x 8, Dynamic ROM, 150 ns
16K x 8, Dynamic ROM, 150 ns
Invalid
32K x 8, Dynamic ROM, 150 ns
ROM Set 2
Jumper
E16-E17
E17-E18
E16-E17
E17-E18
E16-E17
E17-E18
E16-E17
E17-E18
E19-E20
E19-E20
E20-E21
E20-E21
E19-E20
E19-E20
E20-E21
E20-E21
E22-E23
E22-E23
E22-E23
E22-E23
E23-E24
E23-E24
E23-E24
E23-E24
Function
8K x 8, Static ROM, 250 ns
16K x 8, Static ROM, 250 ns
Invalid
32K x 8, Static ROM, 250 ns
8K x 8, Dynamic ROM, 150 ns
16K x 8, Dynamic ROM, 150 ns
Invalid
32K x 8, Dynamic ROM, 150 ns*
166
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
ED
ES
Position
1-2
2-3*
Function
Mono display
Compaq display, third party extended graphics, third party RGB adapters.
1-2*
2-3
If both Mono and Compaq video boards are installed, the Mono display is active during power on if pin is set on
1-2.
I/O Speed/RAM 6 MHz/8 MHz (fast)
6 MHz/6 MHz (common).
For system ROM E and F, between COMMON and FAST. Rev G system ROM selects between COMMON and
HIGH. Rev H system ROM selects between FAST and HIGH for other 80286-based products.
If the speed select jumper is changed to 6 MHz (2-3), the system does not respOnd to speed change requests
from the keyboard.
Reserved
Reserved
7
J108,9,10,11,12,13
DeskPro 286 Version 2
Assy 000361
Switch
1
2,3
4,5
6
7
8
Position
On
Off
2
On
On
Off
Off
4
Off
On
On
Off
Off
Off*
On
3
On
Off
On
Off
5
Off
On
Off
On
Off
On
Off
J108,9,10,11,12,13,17
Function
64K x 1 DRAM
256K x 1 DRAM
Base Memory
Disable RAM and ROM
256K
512K
Enable all base Memory
Memory
64K x 1 DRAM
256K x 1 DRAM. No extended
Enable bank 2 for 1-1½ Mb
Enable bank 2 & 3 for 1-2 Mb
Enable all banks for 1-2½ Mb
8/6 MHz
6 MHz
Reserved
COMPAQ VDU, ECG, EGA or RGBI
Mono
Reserved
DeskPro 286 12 MHz
Assy 000555 &.000700
Switch
1
2,3
4,5
6
Position
On
Off
2
On
On
Off
Off
4
Off
On
On
Off
Off
Off*
On
3
On
Off
On
Off
5
Off
On
Off
On
Off
Function
64K x 1 DRAM
256K x 1 DRAM
Base Memory
Disable RAM and ROM
256K
512K
Enable all base Memory
Memory
64K x 1 DRAM
256K x 1 DRAM. No extended
Enable bank 2 for 1-1½ Mb
Enable bank 2 & 3 for 1-2 Mb
Enable all banks for 1-2½ Mb
12/8 MHz software select
8 MHz
C
Switch
7
8
Position
On
Off
1-2
2-3
E5
J108,9,10,11,12,13,17
167
Function
Reserved
COMPAQ VDU, ECG, EGA or RGBI
Mono
Disable processor slowdown with diskette access
Enable processor slowdown with diskette access (allows time dependent copy protection
schemes to work properly)
Reserved
System Memory Board
Version 2 and 3. Jumpers are etched on the solder side (bottom) of the board. Cut the conductor to
disconnect any unwanted jumpers, then solder the wire(s) to jumpers as desired. Modifying these jumpers
invalidates the warranty.
ROM Set 1
E2
Jumper
1-2 4-5
2-3 4-5
1-2 5-6
2-3 5-6
1-2 4-5
2-3 4-5
1-2 5-6
2-3 5-6
7-8
7-8
7-8
7-8
8-9
8-9
8-9
8-9
Function
8K x 8, Static ROM, 250 ns
16K x 8, Static ROM, 250 ns*
Invalid
32K x 8, Static ROM, 250 ns
8K x 8, Dynamic ROM, 150 ns
16K x 8, Dynamic ROM, 150 ns
Invalid
32K x 8, Dynamic ROM, 150 ns
ROM Set 2
E3
Jumper
1-2 4-5
2-3 4-5
1-2 5-6
2-3 5-6
1-2 4-5
2-3 4-5
1-2 5-6
2-3 5-6
7-8
7-8
7-8
7-8
8-9
8-9
8-9
8-9
Function
8K x 8, Static ROM, 250 ns
16K x 8, Static ROM, 250 ns*
Invalid
32K x 8, Static ROM, 250 ns
8K x 8, Dynamic ROM, 150 ns
16K x 8, Dynamic ROM, 150 ns
Invalid
32K x 8, Dynamic ROM, 150 ns*
DeskPro 286e
Switchbank 1
Switch
1,2
Position
1
On
On
Off
Off
3
Off*
On
On*
Off
4
5
6
On
Off
2
On
Off
On
Off
Function
Base Memory
640K
512K
Reserved
256K
Option ROM disable
Option ROM enable
Auto power on speed
High power on speed
Reserved
All display adapters except Mono
Mono
168
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switchbank 2
Switch
1
Position
On
Off*
On
Off*
On
Off*
4
Off*
On
Off
On
5
Off*
Off
On
On
6,7
6
On*
Off
Off
On
7
Off*
On
Off
On
8
E4
E11
Off*
1-2
1-2
2-3*
2
3
4,5
Function
Secondary address (37X, 17X) FD/HD
Primary address (3FX, 1FX) FD/HD
Disable power on password
Enable power on password
Disable HD controller
Enable HD controller
Serial Port
COM1 primary address 3FX, IRQ4
COM2 secondary address 2FX, IRQ3
Reserved
Disable
Parallel Port
LPT1 primary address 3BX
LPT1/2 secondary address 37X
Reserved
Disable
Enable video
Enable IRQ12 (PS/2 mouse)
8 MHz coprocessor
12 MHz coprocessor
Memory Jumpers
Each jumper represents one bank - a maximum of four can be expanded Memory. With modules in locations A and B, the memory expansion board must
be configured as extended Memory.
Board
Module A
Module B
E1-E3
E4-E6
E7-E9
Ext
Exp
Total
1 Mb
1-2 Ext
2-3*
2-3*
1 Mb
2 Mb
2-3 Exp
2-3*
2-3*
1 Mb
1 Mb
2 Mb
1 Mb
1 Mb
1-2 Ext
1-2 Ext
2-3*
2 Mb
3 Mb
1-2 Ext
2-3 Exp
2-3*
1 Mb
1 Mb
3 Mb
2-3 Exp
2-3 Exp
2-3*
2 Mb
2 Mb
3 Mb
1 Mb
1 Mb
1 Mb
1-2 Ext
1-2 Ext
1-2 Ext
3 Mb
4 Mb
1-2 Ext
1-2 Ext
2-3 Exp
2 Mb
1 Mb
4 Mb
1-2 Ext
2-3 Exp
2-3 Exp
1 Mb
2 Mb
4 Mb
1 Mb
4 Mb
1-2 Ext
1-2 Ext
2-3*
5 Mb
6 Mb
1-2 Ext
2-3 Exp
2-3*
1 Mb
4 Mb
6 Mb
2-3 Exp
2-3 Exp
2-3*
1 Mb
6 Mb
6 Mb
1 Mb
1 Mb
4 Mb
1-2 Ext
1-2 Ext
1-2 Ext
6 Mb
7 Mb
1-2 Ext
1-2 Ext
2-3 Exp
2 Mb
4 Mb
7 Mb
1-2 Ext
2-3 Exp
2-3 Exp
1 Mb
5 Mb
7 Mb
1 Mb
4 Mb
1 Mb
1-2 Ext
1-2 Ext
1-2 Ext
6 Mb
7 Mb
1-2 Ext
1-2 Ext
2-3 Exp
5 Mb
1 Mb
7 Mb
1-2 Ext
2-3 Exp
2-3 Exp
1 Mb
5 Mb
7 Mb
1 Mb
4 Mb
4 Mb
1-2 Ext
1-2 Ext
1-2 Ext
9 Mb
10 Mb
1-2 Ext
1-2 Ext
2-3 Exp
5 Mb
4 Mb
10 Mb
1-2 Ext
2-3 Exp
2-3 Exp
1 Mb
8 Mb
10 Mb
4 Mb
1-2 Ext
2-3*
2-3*
4 Mb
5 Mb
2-3 Exp
2-3*
2-3*
4 Mb
5 Mb
4 Mb
1 Mb
1-2 Ext
1-2 Ext
2-3*
5 Mb
6 Mb
1-2 Ext
2-3 Exp
2-3*
4 Mb
1 Mb
6 Mb
2-3 Exp
2-3 Exp
2-3*
5 Mb
6 Mb
4 Mb
1 Mb
1 Mb
1-2 Ext
1-2 Ext
1-2 Ext
6 Mb
7 Mb
1-2 Ext
1-2 Ext
2-3 Exp
5 Mb
1 Mb
7 Mb
1-2 Ext
2-3 Exp
2-3 Exp
4 Mb
2 Mb
7 Mb
4 Mb
4 Mb
1-2 Ext
1-2 Ext
2-3*
8 Mb
9 Mb
1-2 Ext
2-3 Exp
2-3*
4 Mb
4 Mb
9 Mb
2-3 Exp
2-3 Exp
2-3*
8 Mb
9 Mb
4 Mb
1 Mb
4 Mb
1-2 Ext
1-2 Ext
1-2 Ext
9 Mb
10 Mb
1-2 Ext
1-2 Ext
2-3 Exp
5 Mb
4 Mb
10 Mb
C
Board
Module A
Module B
4 Mb
4 Mb
1 Mb
4 Mb
4 Mb
4 Mb
E1-E3
1-2 Ext
1-2 Ext
1-2 Ext
1-2 Ext
1-2 Ext
1-2 Ext
1-2 Ext
E4-E6
2-3 Exp
1-2 Ext
1-2 Ext
2-3 Exp
1-2 Ext
1-2 Ext
2-3 Exp
E7-E9
2-3 Exp
1-2 Ext
2-3 Exp
2-3 Exp
1-2 Ext
2-3 Exp
2-3 Exp
Ext
4 Mb
9 Mb
8 Mb
4 Mb
12 Mb
8 Mb
4 Mb
DeskPro 286N
Any jumpers are for factory testing purposes only
Jumper
Position
Function
1
On*
Enable video
2
On*
Enable ROM-resident setup
3
On*
Enable external boot
4
On*
Enable power-On password
5
On*
8 MHz coprocessor (or not installed)
Off
12 MHz coprocessor
Reserved in 386sx systems
6
On*
Enable diskette write
E1
1-2
Full fan speed
On backplane
2-3
Automatic (slower, quieter speed until temp reaches 85o F)
DeskPro 386
Version 1
Assy 000401
Jumper
1
2
3
4
5
6
Position
On*
On
On
Off*
On*
Off
Off*
On
Off
Function
Reserved
Coprocessor installed
4 MHz coprocessor
8 MHz coprocessor
CPU boot 16 MHz except when accessing floppy, then 8 MHz
CPU boot 16 MHz always
Reserved
Compaq VDU, ECG, compatible EGA, RGBI, or VGC
Third party Monochrome
Position
On*
Off*
On
Off*
On*
Off
Off*
On
Off
On*
Off
On
Function
Reserved
Coprocessor not installed
80287-3/6 4MHz coprocessor
80287-8 8MHz coprocessor
CPU boot 16 MHz except when accessing floppy, then 8 MHz
CPU boot 16 MHz always
Reserved
Compaq VDU, ECG, compatible EGA, RGBI, or VGC
Third party Monochrome
80287-3/6/8 coprocessor or none installed
80387-16 coprocessor
Reserved
Version 2
Assy 000558
Jumper
1
2
3
4
5
6
7
8
Exp
5 Mb
1 Mb
5 Mb
4 Mb
8 Mb
Total
10 Mb
10 Mb
10 Mb
10 Mb
13 Mb
13 Mb
13 Mb
169
170
The PC Engineer’s Reference Book – Vol 2: Motherboards
DeskPro 386N
As for DeskPro 286N
DeskPro 386/20
SW1
Assy 000749
Jumper
1
2
3
4
Position
On*
Off*
Off*
On*
Off
Off*
On
Off
7
On
Off
Off
5
6
7,8
8
On
On
Off
Function
Reserved – always On
Coprocessor not installed
Reserved – always Off
Auto power on speed
High power on speed
Reserved – always Off
COMPAQ Colour or Dual Mode monitor or CGA installed
Third party Monochrome
Base Memory
640K*
512K
256K
8
On
On
Off
Function
Reserved – always On
Coprocessor not installed
0-12 Mb cacheable memory
0-16 Mb cacheable memory
Auto power on speed
High power on speed
Reserved – always Off
COMPAQ Colour or Dual Mode monitor or CGA installed
Third party Monochrome
Base Memory
640K*
512K
256K
DeskPro 386/25
SW1
Assy 000944 or 001069
Jumper
1
2
3
Position
On*
Off*
On
Off*
On*
Off
Off*
On
Off
7
On
Off
Off
4
5
6
7,8
If the jumper at E14 near the system memory board is moved from its default position (closest to the system PCB) toward the center of the board, the
system clock rate is changed from 25 MHz to 24, for expansion boards that encounter difficulties running at the higher clock rate.
DeskPro 386/20e
Switchbank 1
Assy 001625
Switch
1
2
E4
E10
Position
On*
On
Off*
1-2
2-3
1-2
2-3
Function
Enable VGA
Disable power on password
Enable power on password
Disable IRQ12 (e.g. allows mouse to be used)
Enable IRQ12
8-bit VGA
16-bit VGA
C
Assy 000935, 001196, and 001316
Jumper
1
2
Position
On*
On
Off*
On
Off*
On*
Off
Off*
On
Off
7
Off
Off
On
On
3
4
5
6
7,8
8
Off
On
Off
On
Function
Enable fail safe timer
80387 installed
80387 not installed, or Weitek installed
12-16 Mb area not cached
12-16 Mb area cached
Auto power on speed (20 MHz, 8 MHz accessing floppy)
High power on speed (20 MHz)
Reserved – always Off
Compaq Colour or Dual Mode monitor or CGA
Third party Monochrome
Base Memory
256K
Reserved
512
640*
Switchbank 2
Switch
1
Position
On
Off*
On
Off*
On
Off*
4
Off*
On
Off
On
5
Off*
Off
On
On
6,7
6
On*
Off
Off
On
7
Off*
On
Off
On
8
Off*
2
3
4,5
Function
Secondary address (37X, 17X) FD/HD
Primary address (3FX, 1FX) FD/HD
Disable power on password
Enable power on password
Disable HD controller
Enable HD controller
Serial Port
COM1 primary address 3FX, IRQ4
COM2 secondary address 2FX, IRQ3
Reserved
Disable
Parallel Port
LPT1 primary address 3BX
LPT1/2 secondary address 37X
Reserved
Disable
Enable video
386/25e
Switch
1
2
Position
On*
On
Off*
Function
Enable VGA
Disable power on password
Enable power on password
DeskPro 386s/20
Assy 002040
Jumper
1
2
3
4
5
6
E1
Backplane
Position
On*
On*
On*
On*
On*
1-2
2-3
Function
Enable video
Enable ROM-resident setup
Enable external boot
Enable power-On password
Reserved
Enable diskette write
Full fan speed
Automatic (slower, quieter speed until temp reaches 85o F)
171
172
The PC Engineer’s Reference Book – Vol 2: Motherboards
Assy 001421
Switch
1
2
Position
On*
On
Off*
Function
Enable VGA
Disable power on password
Enable power on password
DeskPro 386s
SW1
Assy 002116
Jumper
1
2
3
4
5
6
E1
On backplane
Position
On*
On*
On*
On*
On*
1-2
2-3
Function
Enable video
Enable ROM-resident setup
Enable external boot
Enable power-On password
Reserved
Enable diskette write
Full fan speed
Automatic (slower, quieter speed until temp reaches 85o F)
Assy 000954, 001145, 001148, 001157, and 001644
Jumper
1
2
3
4
5
6
Position
On*
On
On
Off*
Off*
On
Off
Function
Enable fail safe timer
80387SX installed
Reserved
Auto power on speed (16 MHz, 8 MHz accessing floppy)
High power on speed (16 MHz)
Reserved – always Off
COMPAQ Colour or Dual Mode monitor or CGA
Third party Monochrome
SW2
Assy 000954, 001145, 001148, 001157, and 001644
Switch
1
Position
On
Off*
On
Off*
On
Off*
4
Off*
On
Off
On
5
Off*
Off
On
On
6,7
6
On*
Off
Off
On
7
Off*
On
Off
On
8
Off*
2
3
4,5
Function
Secondary address (37X, 17X) FD/HD
Primary address (3FX, 1FX) FD/HD
Disable power on password
Enable power on password
Disable HD controller
Enable HD controller
Serial Port
COM1 primary address 3FX, IRQ4
COM2 secondary address 2FX, IRQ3
Reserved
Disable
Parallel Port
LPT1 primary address 3BX
LPT1/2 secondary address 37X
Reserved
Disable
Enable video
C
SW3
Assy 000954, 001145, 001148, 001157, and 001644
Switch
1,2
Position
1
Off
Off
On
On
2
Off
On
Off
On
3,4,5,6
3
On
On
On
On
Off
On
On
Off
On
Off
4
On
On
On
On
On
Off
Off
On
Off
On
5
On
On
Off
Off
On
Off
On
Off
Off
Off
6
On
Off
On
Off
Off
On
On
On
Off
Off
Function
Base Memory
256K
Reserved
512
640*
Mem
Mod A
1 Mb
1 Mb
1 Mb
4 Mb
1 Mb
1 Mb
4 Mb
1 Mb
4 Mb
1Mb
1 Mb
4 Mb
1 Mb
4 Mb
4 Mb
4 Mb
Jumper Settings
Assy Nos. 000954, 001145, 001148, 001157, and 001644
Switch
E2
E3
E4
Position
On
On
1-2
2-3
Function
Reserved
Reserved
Disable IRQ12 (e.g. allows mouse to be used)
Enable IRQ12
DeskPro 386/25e
Switch
1
2
Position
On*
On
Off*
Function
Enable VGA
Disable power on password
Enable power on password
DeskPro 386/33(L)
Switch
1
2
Position
On*
On
Off*
Function
Enable VGA
Disable power on password
Enable power on password
Assy 001987
Switch
1
2
3
4
5
6
Position
Off*
On
Off*
On
Off*
On
Off*
On
Off*
Function
Reserved
Disable lock EISA configuration
Read only diskette write
Read/write diskette write
Enable boot from diskette
Disable boot from diskette (override EISA configuration)
Enable erase power on password
Disable erase power on password
Enable erase EISA configuration
Disable erase EISA configuration
Mod B
1Mb
4 Mb
4 Mb
4 Mb
Total
1Mb*
2 Mb
3 Mb
4 Mb
5 Mb
6 Mb
7 Mb
9 Mb
10 Mb
13 Mb
173
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumpers
Jumper
E1
E1(L)
E2
E3
Position
1-2
1-2
2-3
1-2
2-3*
2-3*
Function
Enable maintenance mode
Erase configuration
Standard
Disable power on password
Enable power on password
Enable VGA
DeskPro 486/25
Jumper
E1
E2
E3
Position
1-2
2-3*
1-2
2-3*
2-3*
Function
Enable maintenance mode
Standard mode
Disable power on password
Enable power on password
Enable VGA
DeskPro 486/33L
Jumper
E1
E2
E3
Position
1-2
2-3*
1-2
2-3*
2-3*
Function
Erase standard configuration
Standard configuration
Disable power on password
Enable power on password
Enable VGA
DeskPro 486/50L
Switch
1
2
3
4
5
6
Position
Off*
Off*
On*
Off*
Off*
Function
Reserved
Disable lock EISA configuration
Diskette write enabled
Enable boot from diskette
Disable power on password
Disable override EISA configuration
DeskPro 486/33M
Assy 002319/002297
Switch
1
2
6
Position
On*
Off*
On*
Function
Reserved – always On
Reserved – always Off
Reserved – always On
DeskPro 486s/16M
Switch
1
2
6
Position
On*
Off*
On*
Function
Reserved – always On
Reserved – always Off
Reserved – always On
DeskPro 486s/25M
Switch
1
2
6
Position
On*
Off*
On*
Function
Reserved – always On
Reserved – always Off
Reserved – always On
C
Deskpro 486s/25
Assy 002316/002302)
486s/16 Processor Board
Assy 002313/002300
Switch
1
2
6
Position
Off*
Off*
Off*
Function
Reserved – always Off
487 upgrade not installed**
487 upgrade not installed**
** or 486 or 486/DX2
DeskPro 486/66
Assy 002431
Switch
1
2
6
Position
On*
Off*
On*
Function
Reserved
Reserved
Reserved
DeskPro/I
SW500
Switch
1,2,3,4
Position
1
Off
Off
Off
Off
On
On
On
On
Off
Off
2
On
On
Off
On
Off
Off
Off
Off
On
On
3
Off
Off
Off
On
On
On
On
On
On
On
Function
Processor
386-25
386-33
486SX
487SX
486DX-25
486DX-33
486DX2/50
486DX2/66*
50 MHz overdrive
66 MHz overdrive
4
On
Off
On
On
On
Off
On
Off
On
Off
SW501
Omitted on later models.
Switch
1,2,3,4,5,6
Position
1
Off
On
On
On
On
On
On
2
Off
On
On
On
On
On
On
3
Off
On
On
On
On
On
On
4
On
Off
Off
Off
Off
Off
Off
SW502
System Maintenance
Switch
1
2
3
4
Position
Off*
Off*
Off*
Off*
Function
Enable video
Disable lock setup (allows changes)
Diskette write enabled (e.g. read/write)
Reserved – always Off
5
On
Off
Off
Off
Off
Off
Off
6
On
Off
Off
Off
Off
Off
Off
Function
Processor
386
486SX
487SX
486DX
486DX2
50 MHz overdrive
66 MHz overdrive*
175
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
5
6
Position
On
Off*
Off*
Function
Clear power-On and administrator password
Allow power on and administrator password
Reserved – always Off
Position
1-2
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Function
IRQ 11
IRQ 7
IRQ 10
Capture
DMA channel 0
Playback
Capture
DMA channel 1
Playback
Capture
DMA channel 3
Playback
608h-60bh
534h-537h*
Audio system enabled
Audio
Switch
E1
E3
E6
E4
E7
E9
E8
6
DeskPro/M
Switch
1
2
3
4
Off*
Off*
On
Off*
On
Off*
On
Off*
Function
Reserved
Disable lock EISA configuration
Diskette write enabled
Override EISA Configuration Diskette Boot
Don’t override
Clear power on password
Don’t clear
Erase EISA configuration
Don’t erase
Switch
P2-7
Position
P2
1-2
1-2
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
P3
1-2
1-2
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
Switch
P7
Position
2-3
1-2
2-3*
1-2
2-3*
1-2*
2-3
Off
Function
33/66 MHz
25/50 MHz
Pentium ODP in Write Back mode
Pentium ODP in Write Through mode
Enable Onboard Video
Printer on IRQ 7
Printer on IRQ 5
Clear password
5
6
Position
Processor
P1
P5
P8
P9
P4
3-4
3-4
3-4
1-2
1-2
1-2
1-2
2-3
1-2
2-3
P6
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
P7
1-2
2-3
1-2
1-2
2-3
1-2
2-3
Function
Processor
486SX-25
486SX-33
487SX-25
486DX-25
486DX-33
486DX2/50
486DX2/66*
ODP
ODPR
Pentium ODP
C
DeskPro XE
SW500
Processor
Switch
S1-4
Position
S1
Off
On
On
On
Off
On
On
On
Off
Off
S2
Off
Off
Off
Off
On
Off
Off
Off
On
On
S3
Off
On
On
On
On
On
On
On
On
On
S4
Off
On
Off
Off
On
Off
On
Off
Off
On
Function
Processor
486SX-33
486DX2/50
486DX2/66
486DX4/100
487SX/25
486DX-33
486DX2/50
486DX2/66*
33/66/100 MHz overdrive
25/50/75 MHz overdrive (5v)
SW502
System Maintenance
Switch
S1
S2
S3
S4
S5
S6
Position
Off*
Off*
Off*
Off*
On
Off*
On
Off*
Function
Enable video
Disable lock setup (allows changes)
Diskette write disabled (e.g. read only)
Reserved – always Off
Clear power-On and administrator password
Allow power on and administrator password
Flash ROM can be updated
Prevents Flash ROM updates
Deskpro/XL
SW1
Pentium Based Systems
Switch
S1-2
Position
S1
On
Off
On
Off
S2
Off
Off
On
On
Function
Processor
Pentium/75 MHz, 50 MHz external, 75 internal
Pentium/90 MHz, 60 MHz external, 90 internal
Pentium/100 MHz, 50 MHz external, 100 internal
Reserved
486 Based Systems
Switch
S1-2
Position
S1
On
On
On
Off
S2
On
Off
Off
Off
S3
Off
Off
Off
On
Jumpers
Jumper
E6
E5
Position
1-2
1-2
2-3
Function
Password Enable
Internal battery
External battery
S4
Off
Off
Off
Off
Function
Processor
486DX2/50
486DX2/66
486DX4/100
Reserved
177
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Switches
Switch
S1
S2
S3
S4
S5
S6
Position
On
Off*
On
Off*
Off*
On
Off*
On
Off*
On
Off*
Function
Flash ROM can be updated
Prevents Flash ROM updates
Locks EISA Configuration
Allows changes to EISA
Diskette write enabled (e.g. read/write)
Override EISA config.diskette boot control
Maintains EISA config.diskette boot control
Clear power-On and administrator password
Allow power on and administrator password
Erases current EISA configuration
Maintains current EISA configuration
Portable 286
Jumper
ED
ES
EM
E1-3
Position
1-2
2-3*
1-2*
2-3
Function
Mono
COMPAQ Colour, Dual Mode monitor or CGA
CPU boot 8 MHz
CPU boot 6 MHz
1-2
2-3
If changed to 6 MHz, the system will not respond to speed change requests from the keyboard.
Reserved
128K, 256 K or 512K**
640 Kbytes
** For 512 K, PAL (PN 105045-001) must be in U2 if not already present.
Diskette/Tape Controller Board
Version 1 contains jumpers J1, J2, J3, and J4. Version 2 contains Switch SW1 and shunt jumpers J1 and J2, which replace jumpers J1-J4.
Jumper
Position
Function
J1
1-2
Secondary address 370h
2-3*
Primary address 3F0h
J2
1-2*
Serial port as COM1
2-3
Serial port as COM2
J3
J4
2-3*
1-2
2-3
See also J4
Parallel port enabled
Serial port IRQ4
Serial port IRQ3
See also J2
Portable 386
Jumper
E1,2
E3,4,8,9
Position
E1
2-3*
2-3
1-2
2-3
E3
2-3*
E2
1-2*
2-3
E4
1-2*
E3,4,8,9
E3
2-3
E4
1-2
E3,4,8,9
E3
2-3
E4
2-3
E8
1-2*
3-4*
E8
1-3
2-4
E8
1-2
E9
1-3*
2-4*
E9
1-2
3-4
E9
1-3
Function
Parallel interface
LPT1
LPT2
LPT3
Disable
Serial as COM1 (3FX, IRQ4), with modem or 2nd as COM2 (2FX,IRQ3)
Serial as COM2 (2FX, IRQ3), with modem or 1st as COM1 (3FX,IRQ4)
Serial as COM1 (3FX, IRQ4), with modem or 2nd disabled.
C
Jumper
Position
Function
E3,4,8,9
E3
1-2
E4
2-3
E3,4,8,9
E3
2-3
E4
2-3
E3,4,8,9
E3
1-2
E4
2-3
E3,4,8,9
E3
1-2
E4
1-2
E5
E6
1-2*
1-2
2-3*
1-2
2-3
1-2
E13
1-2*
2-3
2-3
E15
1-2*
2-3
1-2
2-3
1-2
2-3
2-3
1-2
2-3*
1-2
1-2*
2-3
2-3
1-2*
2-3
1-2
1-2
E7
E12
E13,14
E15-17
E18
E19
E20
E21
E22
E23
E24
E25
3-4
E8
1-2
3-4
E8
1-3
2-4
E8
1-3
2-4
E8
1-2
2-4
E14
1-2*
2-3
E16
1-2*
1-2
2-3
2-3
2-3
2-3
E17
1-2*
1-2
1-2
1-2
2-3
2-3
2-4
E9
1-2
3-4
E9
1-2
3-4
E9
1-3
2-4
E9
1-3
2-4
Serial as COM2 (2FX, IRQ3), with modem or 1st disabled.
Modem or 2nd serial as COM1 (3FX,IRQ4), COM2 disabled
Modem or 2nd as COM2 (2FX,IRQ3), COM1 disabled
Both serial disabled
Floppy enabled
Floppy secondary address
Floppy primary address
Primary IRQ 7
Alternative IRQ5
Reserved
Base Memory
640K
512K
256K
Total 32-bit memory
1 Mb
2 Mb
3 Mb
4 Mb
6 Mb
10 Mb
Reserved
Reserved
387 not installed or 3167
387 installed
CPU boot speed 20 MHz, 8 accessing floppy
CPU boot speed always 20 MHz
Reserved
Plasma display in CGA mode
Plasma display in Mono mode
Reserved
Reserved
Portable 486c
Switches
Switch
SW1
SW2
SW3
SW4
SW5
S6
Position
Off*
On
Off*
Off*
On
Off*
On
Off*
On
Off*
Function
Enable video
Locks EISA Configuration
Allows changes to EISA
Diskette write enabled (e.g. read/write)
Override EISA config.diskette boot control
Maintains EISA config.diskette boot control
Clear power-On and administrator password
Allow power on and administrator password
Erases CMOS
Normal ops
179
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumpers
Jumper
ED
ES
EM
MS1,2
MS3
Position
1-2
2-3*
1-2*
2-3
Function
3rd party Mono
COMPAQ Colour, Dual Mode monitor or CGA
CPU boot 8 MHz
CPU boot 6 MHz
MS1
G
V
G
V
V
G*
If changed to 6 MHz, the system will not respOnd to speed change requests from the keyboard.
Reserved
System board memory
Disable
256K
512K
640K
1 Mb memory
1.5 Mb memory
MS2
G
G
V
V
Portable III
Jumpers
Jumper
E1
E2
E3,4
Position
1-2
2-3*
E3
1-2*
E4
1-2*
E5
E16
E5,16
E5,16
E7
E8
E10
E12
E17
1-1
2-2
1-2
1-2
1-1*
2-2*
2-3*
1-2,4-5*
2-3,5-6
1-2*
2-3
2-3*
2-3,4-5*
2-3,5-6
1-2,4-5
1-2,5-6
2-2
Function
CPU speed 12 MHz during floppy access
CPU speed 8 MHz during floppy access
Reserved
Serial Port
Enable COM1
Enable modem COM2
Enable modem COM1
Enable COM2
Serial IRQ3 Select COM2
Modem IRQ4 Select COM1
Modem IRQ3 Select COM2
Serial IRQ4 Select COM1
Enable printer
FD primary address
FD secondary address
16K ROM
32K ROM
Disable ROM set 2
No expansion RAM
Address Bank 1 (J201 and J202)
Address Banks 1-2 (J201 - J204)
Address Banks 1, 2 & 3 (J201 - J206)
Switches
Switch
1,2
S3,4
S5
S6
Position
1
On
On
Off
Off*
3
On
On*
Off
Off
On*
On
Off*
2
On
Off
On
Off*
4
On
Off*
On
Off
Function
Base Memory
None (and no ROM)
0-256K
0-512K
0-640K
Extended Memory
Reserved
640K plus 256 K modules
640K plus 1 Mb modules
Reserved
Enable HD
8 MHz CPU boot speed
12 MHz CPU boot speed
C
Switch
S7
S8
Position
On*
Off
Off*
181
Function
Plasma display in colour mode
Plasma display in Mono mode
Reserved
Plasma Display Controller Board
Jumper
Position
1-2
2-3
Function
Primary address
Secondary address
Portable and Plus
Version 1
Bank 1
Switch
1
2
3,4
5,6
7,8
Position
Off*
On*
Off*
5 Off
5 On
7
On
Off
On
Off
6 Off
6 Off
8
On
On
Off
Off
Function
Reserved - always Off
Copro – always On
Memory - always Off
Mono
Compaq video*
Floppies
1 floppy
2 floppies
3 floppies
4 floppies
Bank 2
Switch
S1-8
Position
Memory
128
192
256
320
384
448
512
544
Function
1
On
On
On
On
On
On
On
Off
2
Off
On
Off
On
Off
On
Off
Off
3
On
Off
Off
On
On
Off
Off
Off
4
On
On
On
Off
Off
Off
Off
Off
5
Off
Off
Off
Off
Off
Off
Off
Off
6
Off
Off
Off
Off
Off
Off
Off
Off
7
Off
Off
Off
Off
Off
Off
Off
Off
8
Off
Off
Off
Off
Off
Off
Off
Off
If ROMs in U40 (and U47) are Rev C or above, SW2 is ignored. It has been removed on Revision J or above. If Revision C ROMs or above are installed,
256K x 1 RAM chips may be used instead of 64K x 1 bit RAM chips in banks 2 and 3, but a new decoder PROM must be in socket U35.
Version 2
Because all Version 2 boards contain Revision C or higher ROMs, only one switch, SW1, is installed.
Bank 1
Switch
1
2
3,4
5,6
7
8
Position
Off*
Off
On*
5
Off
Off
On
On
On
Off
On*
6
Off
On
Off
On
Function
Reserved – always Off
8 MHz Maths copro installed
Reserved – always On
Video adapter
Mono
CGA 40 x 25
CGA 80 x 25
With own BIOS
1 floppy
2 floppies
Reserved – always On
182
The PC Engineer’s Reference Book – Vol 2: Motherboards
Bank 2
Switch
S1-8
Position
Memory
64
128
192
256
320
384
448
512
544-640
Function
1
1
1
1
1
1
1
1
1
0
2
1
0
1
0
1
0
1
0
0
3
1
1
0
0
1
1
0
0
0
4
1
1
1
1
0
0
0
0
0
5
0
0
0
0
0
0
0
0
0
6
0
0
0
0
0
0
0
0
0
7
0
0
0
0
0
0
0
0
0
8
0
0
0
0
0
0
0
0
0
Version 2 contains a shunt jumper for selecting either Banks 2 and 3 or Alternate Banks 2 and 3. To enable Banks 2 and 3, insert the shunt jumper so that
pins 5-12, 6-11, 7-10, and 8-9 are connected. To enable Alternate Banks 2 and 3, try 1-16, 2-15, 3-14, and 4-13.
Asynchronous Board
Jumper
J702
J703
U13
Position
1-2
2-3
1-2
2-3*
5-12,6-11,7-10,8-9
1-16,2-15,3-14,4-13
Function
COM2 Address
COM1 Address
IRQ3
IRQ4
RS-232-C
20 mA current loop
Presario 400
Jumper
P1
P2
P3-5
P6
P7
Position
1-2
2-3*
1-2
2-3
P3
1-2
1-2
2-3
P4
1-2
1-2
2-3
1-2
2-3
P5
1-2
2-3
3-4
Function
25 MHz (50)
33 MHz (66)
PQFP (Socket Not Used)
PGA (Socket Used)
Processor select
486SX (PQFP), 486DX, 486DX2
487SX (Overdrive)
486SX (PGA)
Password erase (remove & replace)
Internal modem ROM
External modem ROM
Presario 500
Jumper
P1,2
Position
P1
2-3
1-3
1-3
2-3
1-3
2-3
2-3
P2
2-3
P5
Function
Processor
486DX33
486SX2/50
Overdrive 50
486DX2/50
486SX2/66
486DX2/66
Overdrive 66
CMOS and password protect (remove to clear, replace)
Presario 5500
Jumper
P1
P2
Position
1-2*
Open
A1
B1
A2
B1
A2
B2
A3
B2
Function
Secure CMOS
Clear CMOS
CPU 1.5 x bus speed
CPU 2 x bus speed
C
Jumper
P3
Position
A2
B2
A1
B2
2
3
4
4
A3
B3
A2
B3
Function
CPU 2.5 x bus speed
CPU 3 x bus speed
50 MHz bus speed
40 MHz bus speed
60 MHz bus speed
66 MHz bus speed
5
Presario 600
Jumper
P5,6
P7
P8
P9
P10
P11
P13
Position
1-2 both
1-2
2-3
None
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
3-4
1-2
None
P14
Function
Enable Onboard video
Nonsocketed enable
Nonsocketed disable
Socketed
33 MHz CPU bus
25 MHz CPU bus
486DX2, 486SX (nonsocketed), 487SX/OD
486SX (socketed)
486SX
486DX2, 487SX/OD
486DX/DX2
487SX/OD
486SX
Config registers super/IO chip 26Eh/26Fh
Config registers super/IO chip 398h/399h
Clear CMOS
Presario 800
CPU
486SX/25
486SX/33
487SX/25
486DX/25
486DX/33
486DX2/50
486DX2/66
ODP
ODPR
Pentium ODP
Jumper
P1
P8
P5
P1
1-2
1-2
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
Position
2-3*
1-2
1-2*
2-3
1-2
2-3*
P9
Presario 700
486 based
P3
1-2
1-2
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
P4
3-4
3-4
3-4
1-2
1-2
1-2
1-2
2-3
1-2
2-3
P6
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
Function
CPU in writeback mode
CPU in writethrough mode
Printer on IRQ7
Printer on IRQ5
Disable video
Enable video
Clear CMOS
P7
1-2
2-3
1-2
1-2
2-3
1-2
2-3
*
*
*
183
184
The PC Engineer’s Reference Book – Vol 2: Motherboards
CPU
486DX-33
486SX2/50
Overdrive 50
486DX2/50
486SX2/66
486DX2/66
Overdrive 66
DX4/100
Jumper
P1
P3
P4
P1
2-3
1-2
1-2
1-2
2-3
2-3
2-3
2-3
Position
1-2
2-3*
1-2*
2-3
1-2
2-3
3-4*
P5
P3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
P4
3-4
3-4
3-4
3-4
3-4
3-4
3-4
3-4
Function
CPU 25 MHz (50)
CPU 33 MHz (66)
Writethrough L1 cache (All486/7)
Writeback L1 cache (Overdrive)
DX4 2.5 x clock speed
DX4 2 x clock speed
DX4 3 x clock speed
Clear CMOS
Pentium Based
Jumper
P3
P5
P11
Position
1-2
2-3
1-2
2-3
1-2
2-3
Function
Enable password
Disable password
60 MHz
50 MHz
CPU core 1.5 x bus speed
CPU core 2 x bus speed
Presario 7100
486 Based
Jumper
JC1
JC2
JC3
JC4
JC5
JC6
JC7
JC8
JC9
JC10
JC11
JP16
JP26
AMD DX2/80
Open
Open
Open
Open
Open
Open
Open
Open
2-3
1-2
2-3
3-4
Open
AMD DX2/80+
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
1-2
2-3
2-3
3-4
Open
PentiumBased
Jumper
JP4
JP7
JP201
Position
Open*
Close
1-2
3-4
1-2,5-6
1-2
2-3*
Function
Enable ES1688 (sound)
Disable
CPU Core/Bus 75/50 MHz
CPU Core/Bus 90/60 MHz
CPU Core/Bus 100/66.6 MHz
Discharge CMOS
Normal ops
AMD DX4/100
Open
Open
Open
Open
Open
Open
Open
Open
2-3
Open
2-3
3-4
1-2
AMD DX4/100+
2-3
2-3
2-3
2-3
2-3
2-3
2-3
Open
1-2
2-3
2-3
3-4
1-2
Cyrix DX2-V80
1-2
1-2
1-2
1-2
1-2
1-2
1-2
Open
1-2
Open
2-3
1-2
Open
Pent Odrive
Open
2-3
Open
2-3
Open
Open
2-3
Open
1-2
Open
1-2
5-6,7-8,9-10
1-2
C
Presario 900
486 based
As for Presario 700
Pentium based
As for Presario 700
Presario 9500
Jumper
P1
P2
P3
Position
Open
A1-A2
B1-B2
A2-A3
B1-B2
A2-A3
B2-B3
A1-A2
B2-B3
1-2
2-3
2-4
4-5
Function
Discharge CMOS
CPU 1.5 x
CPU 2 x
CPU 2.5 x
CPU 3 x
CPU External Bus 50 MHz
CPU External Bus 40 MHz
CPU External Bus 60 MHz
CPU External Bus 66 MHz
ProLiant 1000
CPU
486DX2/66
Overdrive
S1
On
Off
S2
Off
On
S3
On
On
SW2
System Maintenance
Switch
S1
S2
S3
S4
S5
S6
Position
Off*
Off*
Off*
On
Off*
On
Off*
On
Function
Enable Onboard video
Enable changes in NVM
Reserved – always Off
Enable boot from floppy regardless of setup
Floppy boot controlled by setup
Enable password set in configuration
Disable
Clear CMOS
ProLiant 1500
SW1
System Maintenance
Switch
1
2
3
4
5
6
Position
Off*
Off*
On
On
Off*
On
Off*
Function
Enable Onboard video
Enable configuration in NVM
Rack mounted chassis Off=Tower chassis*
Enable boot from floppy regardless of setup
Floppy boot controlled by setup
Clear passwords
Boot is password protected if one is set
Clear CMOS
185
186
The PC Engineer’s Reference Book – Vol 2: Motherboards
ProLiant 2000/4000
Switch
S1
S2
S3
S4
S5
S6
Position
Off*
On
Off
Off*
On
Off*
On
Off*
On
Function
Enable Onboard video
Extra 3rd and 4th processor, enable 2nd fan sensing. Up to 2 processors
Reserved – always Off
Enable boot from floppy regardless of setup
Floppy boot controlled by setup
Enable password set in configuration
Disable
Clear CMOS
ProLiant 4500 Servers
As for Proliant 1500
ProLinea
486 Based
Jumper
E6
E5
Position
1-2
1-2
2-3
CPU
486DX2/50
486DX2/66
486DX4/100
Reserved
Function
Enable password
Internal battery
External battery at P3
S1
On
On
On
Off
S2
On
Off
Off
Off
S3
Off
Off
Off
On
S4
Off
Off
Off
Off
586 Based
Jumper
E6
E5
Position
1-2
1-2
2-3
CPU
586/75 (50)
586/90 (60)
586/100 (50)
Function
Enable password
Internal battery
External battery at P3
S1
On
Off
On
S2
Off
Off
On
Pentium Based
Jumper
E6
E5
Position
1-2
1-2
2-3
CPU
Pentium/75 (50)
Pentium/90 (60)
Pentium/100 (50)
Reserved
Function
Enable password
Internal battery
External battery at P3
S1
On
Off
On
Off
S2
Off
Off
On
On
C
Prosignia
SW1
CPU
486-33 or DX2/66
Overdrive
S1
On
Off
S2
Off
On
S3
On
On
SW2
System Maintenance
Switch
S1
S2
S3
S4
S5
S6
Position
Off*
Off*
Off*
On
Off*
On
Off*
On
Function
Enable Onboard video
Enable changes in NVM
Reserved – always Off
Enable boot from floppy regardless of setup
Floppy boot controlled by setup
Enable password set in configuration
Disable
Clear CMOS
ProSignia 300 Servers
Switch
1
2
3
4
5
Position
Off*
Off*
On
Off*
On
Off*
On
Off*
6
Function
Enable Onboard video
Enable configuration in NVM
Rack mounted chassis
Tower chassis
Enable boot from floppy regardless of setup
Floppy boot controlled by setup
Clear passwords
Boot is password protected if one is set
Clear CMOS
ProSignia VS Server
SW1
CPU
486SX/33
486DX/33 or DX2/66
Overdrive
S1
On
On
Off
S2
Off
Off
On
S3
On
On
On
SW2
System Maintenance
Switch
S1
S2
S3
S4
S5
S6
Position
Off*
Off*
Off*
On
Off*
On
Off*
On
Function
Enable Onboard video
Enable changes in NVM
Reserved – always Off
Enable boot from floppy regardless of setup
Floppy boot controlled by setup
Enable password set in configuration
Disable
Clear CMOS
004506001, 004509001
Switch
1
Position
Off*
Function
Enable Onboard video
187
188
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
2
3
4
5
Position
Off*
On
Off*
On
Off*
On
Off*
6
Function
Enable configuration in NVM
Rack mounted chassis
Tower chassis
Enable boot from floppy regardless of setup
Floppy boot controlled by setup
Clear passwords
Boot is password protected if one is set
Clear CMOS
486 based
Assy 003904001, 003907001
SW1
Assy 003910001, 003922001
CPU
486DX2/50
486DX2/66
486DX4/100
Reserved
Jumper
E6
E5
S1
On
On
On
Off
Position
1-2
1-2
2-3
S2
On
Off
Off
Off
S3
Off
Off
Off
On
S4
Off
Off
Off
Off
Function
Enable password
Internal battery
External battery at P3
586 Based
With or without integrated graphics.
Assy 003768001, 003771001, 003774001
Jumper
E6
E5
Position
1-2
1-2
2-3
CPU
586/75 (50)
586/90 (60)
586/100 (50)
S1
On
Off
On
Function
Enable password
Internal battery
External battery at P3
S2
Off
Off
On
SLT 286
Jumper
J1
Position
1-2
2-3*
Function
8 MHz 80287
12 MHz 80c287
Jumpers E2, E3, and E4 are reserved. They must be installed for proper operation.
SLT 386s/20
Jumper
SW1-1
SW1-2
Position
On*
On
Off*
Function
Enable fail safe timer
Enable clear password
Disable clear password
C
Sytempro
Switch
E1
E2
E3
E4
Position
2-3*
1-2
2-3*
2-3*
Function
Enable power on password
Reserved
Bypass extended NVM on power up (maintenance)
Read extended NVM on power up (standard)
Enable Onboard video
Compower
See Procomp
Computer Technology System
www.acttcs.com.tw
Computrend
See Premio
Concord OA
Now AVT Industrial. www.concord.com.hk
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1C
Motherboard
COA 530
Code
4C
COA 507
Fugutech M 507 in disguise
COA 530
Fugutech M 530 in disguise
Core International
Atomizer 386/33
Switch
S1
S2
S3
S4
S5
S6
S7
S8
W3
Position
On*
Off*
Off*
Off*
Off*
On*
Off
On*
On
Off*
1-2
Function
Reserved
80387 not installed
Reserved
EGA BIOS relocation disabled
Reserved
Colour video
Mono video
Cache activated
Bus speed 11 MHz
Bus speed 8.25 MHz
Reserved
Motherboard
COA 507
189
190
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
W4,5,6
W7
W8
W10
W11
W12
W13
Position
Out*
1-2
2-3
1-2
Out
Out
1-2
1-2
Out
1-2
2-3*
W15
W22
W23
In
Out*
In
Out*
W25
Function
Reserved
80387 in asynchronous mode
80387 in synchronous mode
80387 in asynchronous mode
80387 in synchronous mode
Reserved
Cache enabled
Direct mapped cache (see also W13)
2-way set associative cache
Direct mapped cache (see also W12)
2-way set associative cache
Turbo switch connector. Either connect turbo switch to W11, then turbo light to W25, to slow system board to non-cache
speed, or connect turbo switch to On/Off jumper and light to W9.
Cache video BIOS if not relocated
Don’t cache
Cache video BIOS if not relocated
Don’t cache
Cache turbo light
Crusader
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
9C
AC
Motherboard
C586 IPC
586VX Rev B+
C688 LX
Code
AC
FC-00
HC
Motherboard
C586 HX
C586 VX Rev C+
C586HX rev D+
C586HX
Same as DFI G586IPC rev D+ or Global Impact C586HX
C586VX
Same as DFI G586IPV
CyberMax
Rebadges Biostar motherboards.
Cycle Computer Corp
www.cyclecc.com
D
Daewoo
Award BIOS ID
The last two numbers of the BIOS part number.
Code
H-00
Motherboard
CPC 4600
Code
Motherboard
486 (CPC 2700U?)
VL Bus, with UMC 82C491F chipset. 8 30-pin SIMM sockets & 2 PS/2 connectors. P/N 9916522801
Jumper
JP1
JP2
JP4-8
JP9,11
JP10
JP12
Position
1-2
2-3
Off
On
Off
JP5
Off
2-3
1-2
JP9
1-2,3-4
2-3
1-2,3-4
On
Off
5-6
1-2,5-6
1-2,3-4
3-4
JP5
1-2
2-3
1-2
JP11
1-2
Off
2-3
JP6
Off
Off
On
JP7
Off
On
On
JP8
On
On
On
Function
CMOS clear
Normal
External battery
Colour display
Mono display
Cache Size
64K
128K
256K
CPU
486DX
486SX
487SX
CPU > 33 MHz
CPU <= 33 MHz
25 MHz
33 MHz
40 MHz
50 MHz
192
The PC Engineer’s Reference Book – Vol 2: Motherboards
Darter
DataExpert
www.dataexpert.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
1-00
9C
AC
Motherboard
EXP 4044
EXP 4049
EXP 8561
MLX 8440-0A/0B
Code
BC
CC
EC-00
Motherboard
ExpertColor MLX 8440
EXP 8661
ExpertColor TX430II
ExpertColor TX 430II
Same as Global Circuit GCT 8ITB
Datatech
www.dtk.com. See also Gemlight
Dell
286-8/12
Switch
SW1
SW2
SW3
SW4
SW5
SW6,7,8
Position
On
Off*
On
Off*
On*
Off
On
Off*
Base Memory
256K
512K
640K
512K+512 ext
640K+384 ext
Function
Colour monitor primary
Mono monitor primary
LED shows fast speed
LED shows power
256K ROM
128K ROM
Maintenance Mode
Operation mode
Reserved
SW6
SW7
On
On
Off
Off
Off
On*
Off
200
Jumper
J5
J13,14
J15
J16
Position
Out
In
Maths Copro
80287/82C287
Debugger in slot
Function
Normal operations
Maintenance mode
J13
J14
1-2
2-3
2-3
Reserved
SW8
On
Off
On
Off
Off
D
210
Jumper
W1
W4
W5
W10
W11
WX1
WX2
Position
1-2
2-3
2-3
1-2
2-3
2-3
2-3
1-2
2-3
1-2
Off
Function
VGA via feature connector
On board VGA
Enable floppy
IDE drives that tristate IRQ14
IDE drives that do not tristate IRQ14
Enable IDE
Enable VGA
Mono adapter
Colour adapter
On board video drives IRQ9
Doesn’t
Position
Out*
1-2
2-3
In*
Function
Normal use
Maintenance – cycles POST
EPROM programming
Enable password
212N
Jumper
J41
J44
220
Jumper
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10,12,13
W11
W15,16
W14
W17
Position
1-2 In
1-2 Out
Out
1-2
1-2*
3-4
5-6
7-8
1-2*
1-2*
2-3
In*
Base Memory
640K*
256K
1-2
1-2 both
1-2
2-3
Out*
In
Function
Colour video
Mono
Disable gate to read status bits on parallel port
Enable external oscillator input
Enable COM1 IRQ4
Enable COM2 IRQ3
Enable LPT2 IRQ5
Enable LPT2 IRQ7
Enable HD
Enable floppy
HD INT selected
IDE HD diagrams enabled
Reset
W10
W12
W13
2-3
1-2
2-3
1-2
Disable VGA
8 MHz coprocessor
512K ROM
256K ROM
Normal clock for 80287
Clock divided by 2 for 80287
300
Jumper
J9
J10
J11
Position
In*
Out
In
Out*
Function
Reset
Colour video
Mono video
Maintenance mode
Operational mode
193
194
The PC Engineer’s Reference Book – Vol 2: Motherboards
316
Jumper
JMPHD
JMPRDY
Position
1-2
Function
Reserved
For some 3rd party drives that require an extra signal on pins 21 or 27
316sx
Jumper
JM3
JM4
JM5
JM6
JM7
JM8
JM9
Position
1-2 In
1-2 Out
1-2
2-3
2-3*
1-2
2-3
2-3*
1-2
2-3
2-3*
Function
On board VGA drives IRQ9
On board VGA ignores IRQ9
Mono display
Colour display
Enable VGA
IDE pin 21/IOCHRDY
IDE pin 27/IOCHRDY (should be out)
Enable IDE
IDE tristate IRQ14
IDE does not tristate IRQ14
Enable floppy
320LX
Jumper
JMPHD
JMPRDY
Position
1-2*
2-3
1-2
2-3
Function
ESDI and most IDE drives
IDE drives needing SLVACT asserted
Pin 21/IOCHRDY
Pin 27/IOCHRDY (should be out for Dell IDE drives)
325/333D
Jumper
RSET
MOCO
MNT
EPWD
PIDE*1
SIDE*1
MSYC
VIRQ
NIDE*2
OIDE*2
EVGA
AROM
WSP1
Position
Out*
Out
In*
Out*
In*
Out
In*
Out*
In
Out*
In
Out*
In
Out
In*
Out
In*
In*
Out*
Out*
Function
Reserved
VGA Mono on boot
VGA colour on boot
Reserved
Enable password
2 x HD – 2nd is primary
1 x IDE – always primary
Primary IDE on system board
Primary IDE on expansion board
Not using multisync
Using multisync
Onboard VGA not using IRQ9
Onboard VGA using IRQ9
Not using new IDE drives
New IDE drives (>Jan 89)
Not using old IDE drives
Old IDE drives (<Jan 89)
Enable VGA
Reserved
Reserved
Position
Out*
Out
In*
Out*
Function
Reserved
Mono on boot
Colour on boot
Reserved for maintenance
325/333P
Jumper
WSP2
MOCO
MNT
D
Jumper
EPWD
PIDE
SIDE
MSYC
VIRQ
NIDE
OIDE
EVGA
AROM
WSP1
Position
In
In*
In*
Out*
In
Out*
In
Out*
In
Out
In*
Function
Cycle POST on power up
Enable password
Always jumpered - IDE HD primary
IDE on system board
IDE on expansion board
Not using multisync
Using multisync
Video not using IRQ9
Video using IRQ9
Old IDE drives that do not gate IRQs internally
Newer IDE drives with internal IRQ gating
Out*
In*
Out*
Out*
Should be closed for all Dell IDE drives
Opposite of NIDE – open for all Dell IDE drives
Enable VGA
Reserved
Reserved
Position
In*
Out
In
Out*
Function
Colour video
Mono video
Maintenance mode
Normal ops
Position
Out
In
1-2
2-3
Function
Normal ops
Reserved
Mono on boot
Colour on boot
Reset
SIMM bank A=2Mb SIMM
SIMM bank A=1Mb SIMM
SIMM bank B=2Mb SIMM
SIMM bank B=1Mb SIMM
SIMM bank C=2Mb SIMM
SIMM bank C=1Mb SIMM
SIMM bank D=2Mb SIMM
SIMM bank D=1Mb SIMM
386-16
Jumper
J10
J11
425E
Jumper
JM2
JM4
J20
J26A
J26B
J26C
J26D
Out
In
Out
In
Out
In
Out
In
DFI
Diamond Flower International. www.dfiusa.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
9C-00
9C-00
AC
AC-00
Motherboard
G586IPV rev B+
G586VPM vB/G586VPS Pro vB1+
586STC
G586IPC rev B+/ITBD
G586VPM
Code
BC
FC
GC
HC
LC
Motherboard
G586IPC rev C+
G586IPV rev C+
G586IPC rev D+/586IPV C+
G586IPC rev D+
G586IP/W
195
196
The PC Engineer’s Reference Book – Vol 2: Motherboards
G586IPC
Same as Crusader C586HX rev D+ or Global Impact C586HX
G586IPV B+
Same as Crusader C586VX rev B+
G586IPV C+
Same as Crusader C586IPV rev C+
P2XBL
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Switch
SW1
JP1
JP3
JP4
Description
ATX
Pentium II/Celeron
440 BX
Award 4.51PG
4 PCI/3 ISA
768 Mb
2 EIDE, floppy, USB
Notes
Slot 1
1 each shared
3 DIMM sockets
AGP
Average
Position
1
Off
On
Off
On
Off
On
Off
On
Off
On
1-2
2-3
1-2
2-3
Out
1-2
2-3
2
Off
On
On
Off
Off
On
On
Off
Off
On
3
On
Off
Off
Off
Off
On
On
On
On
Off
4
On
On
On
On
On
Off
Off
Off
Off
Off
Function
Clock Multiplier
3.5x
4x
4.5x
5x
5.5x
6x
6.5x
7x
7.5x
8x
Disable wake-on-keyboard/mouse
Enable
Auto FSB
66 MHz
100 MHz
Normal
Clear CMOS
P5BV3+
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
AT
K6, etc
550
Via MVP3
Award 4.51PG
4 PCI/3 ISA
512 Mb
512
2 EIDE, floppy, USB
Notes
Socket 7
1 each shared 100 MHz
3 DIMM sockets
AGP
Average
D
Diamond Flower International
See DFI
Diamond Micronics
www.diamondmm.com
Digicom
www.digicomgroup.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
Motherboard
P5-VP
Code
9C-00
Motherboard
P54HP
Digimate
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC
Motherboard
T5DX-VPX1E-1
Code
DC
Motherboard
T5DX-VPX2E
T5DX-VPX1E-1
Same as Eagle VPX 200B and one Vtech.
T5DX-VPX2E
Same as Vtech/PCPartner VIB804DSE
Digital
www.digital.com
Domex
Formerly DTC. www.domexusa.com www.domex.com.tw
DTC
See Domex
DTK
www.dtk.com.tw See also Gemlight
Award BIOS ID
The last two numbers of the BIOS part number.
197
198
The PC Engineer’s Reference Book – Vol 2: Motherboards
Code
9C
AC
Motherboard
GMB P55IPS/P57IPS
PAM 0055I
Code
IC
JC
Motherboard
PAM 0054I
PAM 541PS
PAM 0054I-E1
Same as Gemlight GMB P54PSI?
QUIN-35
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Notes
Sis 85C501, 85C502, and 85C503
Award
3 PCI/3 ISA
Up to 128 MB of conventional DRAM
Up to 1 MB of standard Cache (K)
2 16550 serial, 1 EPP/ECP parallel, 1 game port, floppy, 2 EIDE
Also Winbond W83769F, W83787F, and W83768F chips
1 each shared. PCI 2.0-compliant
4 72-pin sockets
E
Eagle
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC
Motherboard
VPX 200B
Code
Motherboard
VPX 200B
Same as Digimate T5DX-VPX1E-1 or a Vtech.
ECS
Elite Group. www.ecs.com.tw www.ecsusa.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
1C-00
2C-00
9C
A
Motherboard
UM 8810P
SI54P-AIO rev 1.0
SI54P-AIO
SI55P AIO
SI56P AVIO
Code
AC
AC-00
DC
HC
NC
Motherboard
SI54P-AIO rev 1.0
SI54P AIO
SI55P AIO
TS54P-AIO
TR5510-AIO
AL 486(-I)
Jumper
JP2
Position
Open
1-2
2-3
Function
Normal EPROM
12v Flash ROM
5v Flash ROM
200
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP11,12
20,21
JP13-15
JP22
JP23
JP39
JP46,62
Cache Size
64K
128K
256K
512K
Position
JP11
3-4,5-6
1-2,3-4
1-2,5-6
3-4,5-6
JP13
Short
Open
Short
1-2
2-3
1-2
2-3
1-2
2-3
JP46
1-2
2-3
Open
JP12
1-2
1-2
2-3
2-3
JP14
Open
Open
Open
JP21
1-2
1-2
2-3
2-3
JP62
Open
1-2 3.45v, 2-3 3.3v
Open
JP16
Open
Short
Short
Short
CPU Type
JP20
1-2
1-2
2-3
2-3
JP15
Short
Open
Open
JP33
Open
Open
Open
Short
JP25
JP34
Open
Short
Short
Short
JP31
486SX/SX2
Open
Open
486DX/DX2
Short*
Open
487SX
Open
Open
486DX/DX2 (SL)
Short
Open
486SX/SX2(SL)
Short
Open
486DX4(SL)
Short
Open
Am486DXL/DXL2
Open
Open
Cx486S(M6)
Open
2-3
Cx486DX/DX2 M7
Open
2-3
*DX50 only **3x CPU clock – Short for 2x clock
JP32
Open
Open
Open
1-2
1-2
1-2
5-6
3-4
3-4
JP40
1-2
2-3
1-2
1-2 (64Kx8)
2-3(128Kx8)
JP35
Function
CPU Speed
25 MHz
33 MHz
40 MHz
50 MHz
CPU type for system controller
Cx486s (M6)
Intel 80486 & Am486
Cx486DX/DX2 (M7)
<=33 MHz VESA clock speed
> 33 MHz
0 VESA wait state
1 VESA wait state
Local ready select <=33 MHz
Local ready select >33 MHz
CPU voltage
5v (from power supply)
3.45/3.3v onboard
3.3v from special power supply
JP41
Open
Open
Short
Short
JP36
JP37
Open
Open
Open
2-3
Open
1-2
1-2
2-3
1-2
Open
1-2
2-3
5-6
2-3
3-4
Open
Open
3-4
Op***
2-3
***1x CPU clock – short for 2x
FA 386
Jumper
JP1,3
JP2
JP4-7
Position
JP1
Open
Closed
1-2
2-3
JP4
1-2
2-3
JP3
Open
Closed
JP5
1-2
2-3
JP6
Open
Closed
JP7
Open
Closed
Function
Coprocessor
No 80387
80387 installed
Mono display
Colour
Cache setting
64K
128K
JP38
JP45
JP48
JP49
JP52
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
2-3
2-3
2-3
2-3
1-2
2-3
2-3
2-3
Opn**
-
Open
Open
Open
Open
Open
Open
1-2
2-3
2-3
2-3
1-2,3-4
1-2,3-4
1-2,3-4
2-3
1-2,3-4
1-2,3-4
2-3
1-2,3-4
JP6
0
2-3
2-3
2-3
1-2
1-2
1-2
2-3
1-2
1-2
E
FA 486
Jumper
JP2
JP3-4
JP5-8
Position
1-2
2-3
JP3
1-2
Open
2-3
JP5
Open
Open
Closed
JP4
1-2,3-4
2-3
1-2,3-4
JP6
2-3
1-2
2-3
JP7
1-2
2-3
2-3
JP8
Open
Closed
Closed
Function
Mono display
Colour
CPU Type
80486DX (DX2)
80486SX
80487SX (Overdrive)
Cache setting
64K
128K
256K
FE 386
Jumper
J3
JP2
W2-9
Position
1-2
2-3
Closed
Open
Cache size
64K
128K
256K
Function
Colour display
Mono
80387 installed
No 80387
W2
W3
Open
Open
Open
Open
Close
Close
W4
Open
Close
Close
W5
Open
Close
Close
MX 386
Jumper
JP1
JP2
JP3
JP4
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Function
Mono display
Colour display
Coprocessor installed
Not installed
A20MASK selector from keyboard (Cyrix)
A20MASK selector from chipset (Cyrix)
KEN selector current version (Cyrix – v1.0)
KEN selector next reversion ox MXC305 (Cyrix - v1.0)
P5HX-A v1.0
Jumper
JP1
JP2-5
JP7,8
JP9
JP10
JP11
Position
1-2
3-4
1-2
2-3
JP7
1-2
1-2
2-3
2-3
Open
Open
1-2,3-4
open
3-4
1-2
2-3
1-2
1-2
JP8
1-2
2-3
2-3
1-2
2-3
1-2
Function
3.3v (STD) I/O voltage
3.52v (VRE) I/O voltage
P54C, 6x86
P55C
Clock Multiplier
1.5x
2x
2.5x
3x
Cyrix 2x
Cyrix 3x
50 MHz Host Clock
55 MHz Host Clock
60 MHz Host Clock
66 MHz Host Clock
Flash ROM PnP (12v)
Flash ROM non-PnP (5v)
Clear CMOS
W6
1-2
2-3
1-2
W7
Open
1-2
2-3
W8
1-2
2-3
2-3
W9
1-2
1-2
2-3
201
202
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP12
JP15-16
Position
2-3
2-3
1-2
JP15
Short
Open
Function
Normal operation
Flash ROM normal
BIOS recover
Cache size
256K
512K (onboard)
Case Connections – J12
SMI switch
Reset switch
Power LED
Keyboard lock
Speaker
4-5
9-10
11-13
14-15
17-20
P5HX-A v1.1
Jumper
JP1
JP2-5
JP7,8
JP9
JP11
JP15-16
JP17
JP18
Position
1-2
3-4
All 1-2
All 2-3
JP7
1-2
1-2
2-3
2-3
1-2,3-4
open
3-4
1-2
1-2
2-3
JP15
Open
Short
Open
Short
Open
1-2
3-4
5-6
7-8
1-2
2-3
JP8
1-2
2-3
2-3
1-2
Function
3.3v (STD) I/O voltage
3.52v (VRE) I/O voltage
Single voltage CPU
Dual voltage CPU
Clock Multiplier
JP7 open for Cyrix 6x86
1.5x
2x
2.5x
3x
50 MHz Host Clock
55 MHz Host Clock
60 MHz Host Clock
66 MHz Host Clock
Clear CMOS
Normal operation
Cache size
256K (module)
256K (onboard)
512K (modue)
512K (256K onboard + 256K module)
512K (onboard)
2.5v CPU core voltage
2.7v CPU core voltage
2.8v CPU core voltage
2.9v CPU core voltage
Password check disabled
Enabled
P5HX-B
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium
166
Intel 430HX
Award Flash
4 PCI/4 ISA
8-256
512
2S, 1P, floppy, IDE, USB, IR
Notes
Socket 7
4 72-pin sockets – EDO/FPM
E
Jumper
JP2,3
Position
JP2
1-2
1-2
2-3
2-3
JP4
1-2,3-4
open
3-4
1-2
1-2
2-3
1-2
3-4
All 1-2
All 2-3
JP15
In
Out
In
In
Out
1-2
3-4
5-6
JP5
JP10
JP11-14
JP15-16
JP17
JP3
1-2
2-3
2-3
1-2
JP16
1-2
1-2
3-4
3-4
Out
Function
Clock Multiplier
1.5x
2x
2.5x
3x
JP2 open for Cyrix 6x86
50 MHz Host Clock
55 MHz Host Clock
60 MHz Host Clock
66 MHz Host Clock
Clear CMOS
Normal operation
3.3v (STD) I/O voltage
3.52v (VRE) I/O voltage
Single voltage CPU
Dual voltage CPU
Cache size
256K (onboard)
256K (module)
512K (256K onboard + 256K (module)
512K (onboard)
Nil
2.51v CPU core voltage
2.73v CPU core voltage
2.91v CPU core voltage
Case Connections – J12
Turbo LED
SMI switch
Turbo Switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
6-7
9-10
11-13
14-15
17-20
P5SD-B
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Video
Performance
Comments
Jumper
JP1,2,3
Description
Baby AT
Pentium
75-500 MHz
SiS 5591/5595
4 PCI/3 ISA
384 Mb SDRAM
Position
JP1
2-3
1-2
2-3
2-3
1-2
1-2
JP2
2-3
2-3
2-3
1-2
2-3
1-2
Notes
Socket 7
2 DIMM sockets
AGP
100 MHz bus speed with 5 x multiplier
Power for AT and ATX.
JP3
2-3
2-3
1-2
2-3
1-2
2-3
Function
Ext clk
60
66.8
68.5
75
75
83.3
AGP
60
66.8
68.5
64
75
66.6
PCI
30
33.4
34.3
32
37.5
33.3
203
204
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP5
JP6
JP10-12
JP13
JP14
Position
2-3
1-2
1-2
1-2
1-2
2-3
1-2
2-3*
JP10
JP11
1-2
1-2
2-3
1-2
2-3
2-3
1-2
2-3
2-3
1-2
2-3
2-3
1-2
2-3
1-2
3-4
5-6*
1-2,3-4,7-8
1-2,3-4,5-6,7-8
7-8
5-6,9-10
3-4
3-4,9-10
3-4,7-8,9-10
3-4,5-6
3-4,5-6,9-10
3-4,5-6,7-8,9-10
1-2
1-2
JP12
2-3
2-3
2-3
Function
90
60
30
100
66.6
33.3
ATX power supply
AT power supply
Normal
Clear CMOS
CPU clock multiply
1.1/3.3x
2x
2.5x
3x
4x
4.5x
5x
Reserved for 100 MHz
CPU I/O voltage VRE 3.5v
CPU I/O voltage STD 3.3v
1.8v CPU core voltage
2v CPU core voltage
2.2v CPU core voltage
2.5v CPU core voltage
2.8v CPU core voltage
2.9v CPU core voltage
3.1v CPU core voltage
3.2v CPU core voltage
3.3v CPU core voltage
3.5v CPU core voltage
P5SJ-B
To enable VGA, set JP1-2 at 1-2, JP10 at 2-3. Reverse to disable.
P5SD-B+
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
Baby AT
Pentium
66-100
VT82C586B
Award
4 PCI/2 ISA
512
The usual
AGP
Notes
Socket 7
P5SJ-B
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Baby AT
Pentium
66-100
Sis 5598
Award
3 PCI/3 ISA
512
The usual
Notes
Socket 7
E
P5SS-Me (Sinbad)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
Video
Description
Micro ATX
Pentium
Notes
Socket 7
SiS 530/5595
3 PCI/1 ISA
1 Gb
1 Mb
AGP
66-100 MHz
3 DIMM sockets
P5TX-Apro
Defaults to 3.3 volts. For dual voltage, set JP-04 to 3-4.
P5TX-Bpro
Pentium
Jumper
JP1
JP1
JP2
JP3
Position
11-13,19-21,20-22
11-13,17-19,20-22
9-11,19-21,20-22
11-13,19-21,18-20
9-11,17-19,18-20
9-11,17-19,20-22
11-13,17-19,18-20
1-3,2-4
1-3,4-6
3-5,4-6
3-5,2-4
1-2*
2-3
11-12
9-10
7-8
3-4
1-2
Function
50 Mhz External Clock Speed
55 Mhz External Clock Speed
60 Mhz External Clock Speed
66 Mhz External Clock Speed
68 Mhz External Clock Speed
75 Mhz External Clock Speed
83 Mhz External Clock Speed
1.5x & 3.5x clock multiplier
2x clock multiplier
2.5x clock multiplier
3x clock multiplier
Clear CMOS
Normal operations
2.2v CPU core voltage
2.8v CPU core voltage
2.9v CPU core voltage
3.2v CPU core voltage
3.25v CPU core voltage
Case Connections – J22
Power-on LED
SMI switch
Reset switch
Keyboard lock
Speaker
2-3
4-5
9-10
11-15
17-20
P5VP-A+
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
K6 etc
450
Via MVP3
Award 4.51PG
4 PCI/2 ISA
768 Mb
2 EIDE, floppy, USB
Notes
Socket 7
1 each shared 124 MHz
3 DIMM sockets
AGP
Average
205
206
The PC Engineer’s Reference Book – Vol 2: Motherboards
P5VX-A
Jumper
JP3
JP8
JP10
JP11,12
JP13
JP15
JP16-18
JP20
JP21
Position
Open
1-2,3-4
1-2
3-4
1-2
2-3
1-2
3-4
JP11
1-2
1-2
2-3
2-3
Open
Short
1-2
2-3
1-2
2-3
1-2
3-4
Open
Short
JP12
1-2
2-3
2-3
1-2
Function
50 MHz CPU
55 MHz CPU
60 MHz CPU
66 MHz CPU
12v Flash ROM
5v Flash ROM
3.3v (STD) I/O voltage
3.52v (VRE) I/O voltage
Clock multiplier
1.5x
2x
2.5x
3x
Normal
Clear CMOS
Enable Super I/O
Disable
P54C
P55C (Mount U10)
2.5v CPU core voltage
2.8v CPU core voltage
Disable 3D sound
Enable
Case Connections – J12
Power On
SMI switch
Reset switch
Power LED
Keyboard lock
Speaker
1-2
4-5
9-10
11-13
14-15
17-20
P5VX-B
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
JP3
JP4
JP8
JP10
JP11,12
Description
Pentium
166
Intel 82437VX
Award Flash
4 PCI/4 ISA
4-128
0-512
2S, 1P, floppy, IDE
Position
Open
1-2,3-4
1-2
3-4
1-2
2-3
Short
1-2
3-4
JP11
1-2
1-2
JP12
1-2
2-3
Notes
Socket 7
4 72-pin sockets - EDO/FPM. 1 DIMM
Function
50 MHz Host clock
55 MHz Host clock
60 MHz Host clock
66 MHz Host clock
12v Flash ROM programming
5v Flash ROM programming
512K cache (256 onboard + module)
3.3v (STD) CPU voltage
3.525v (VRE) CPU voltage
CPU clock multiplier
1.5x
2x
E
Jumper
JP13
JP15-16
JP17
Position
2-3
2-3
Open
Short
JP15
1-2
2-3
1-2
3-4
2-3
1-2
JP16
1-2
2-3
Function
2.5x
3x
Normal operations
Clear CMOS
CPU Type
Intel P54C, CT, CTB, Cyrix M1
P55C (needs VR at U30)
2.5v P55C core voltage
2.8v P55C core voltage
Case Connections – J12
Turbo LED
SMI switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
9-10
11-13
14-15
17-20
P5VX-Be
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
JP1
JP2
JP4
JP5
JP6
JP7
JP11,12
Description
Pentium
200
Intel 430VX
Award Flash
4 PCI/3 ISA
4-128
2S, 1P, floppy, IDE, NCR SCSI, USB, IR
Position
In
Out
1-2,3-4,5-6
1-2,3-4
3-4,5-6
1-2,5-6
In
Out
1-2
3-4
1-2
2-3
1-2
3-4
5-6
JP11
1-2
2-3
2-3
1-2
JP12
1-2
1-2
2-3
2-3
Case Connections – J20
Turbo LED
SMI switch
Reset switch
Power LED
Notes
Socket 7
2-3
4-5
9-10
11-13
Function
Disable password check
Normal operation
50 MHz Host Clock
55 MHz Host Clock
60 MHz Host Clock
66 MHz Host Clock
Clear CMOS
Normal operation
3.3v CPU I/O voltage
3.525v CPU I/O voltage
Split Rail CPU
Single voltage CPU
2.5v CPU core voltage
2.8v CPU core voltage
2.9v CPU core voltage
Clock Multiplier
1.5x
2x
2.5x
3x
4 72-pin sockets - EDO/FPM. 1 DIMM
May hang if set to write-back
SMC 37C665 I/O controller - check for GT at end of model no, to fix
crashes using comms programs. SCSI controller may need IRQ 15.
207
208
The PC Engineer’s Reference Book – Vol 2: Motherboards
Keyboard lock
Speaker
14-15
17-20
P6BAT-A+
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Audio
Jumper
JP1
JP2
JP4
JP7
JP9
Description
ATX
Pentium II/III/Celeron
VIA
Award Flash
4 PCI/2 ISA
768
2S, 1P, floppy, IDE, NCR SCSI, USB, IR
Yamaha
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Function
Normal
Clear CMOS
Disable Keyboard Power On
Enable
Normal bus frequency
Force 100 MHz
Enable Flash BIOS
Disable
66/100 MHz
Force 133 MHz
P6BTM
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Celeron
440 BX
Award 4.51PGMA
3 PCI/2 ISA
1024 Mb
2 EIDE, floppy, USB
AGP
Notes
Description
ATX
Pentium II/Celeron
440 BX
Award 4.51PGMA
5 PCI/2 ISA
768 Mb
2 EIDE, floppy, USB
Notes
Slot 1
66-100 MHz
P6BX-A+
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Slot 1
1 each shared
3 DIMM sockets
AGP
Relatively poor
P6BX-Me
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
Description
ATX
Pentium II/Celeron
440 BX
Award 4.51PGMA
2 PCI/2 ISA
384 Mb
Notes
Slot 1
66-100 MHz
Notes
Socket 370 & Slot 1
3 DIMM sockets
E
Item
I/O
Video
Performance
Description
2 EIDE, floppy, USB
Notes
AGP
P6BX-MS
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
Micro ATX
Pentium II/Celeron
440 BX
Award 4.51PGMA
3 PCI/1 ISA
768 Mb
Notes
Slot 1
66-100 MHz
2 EIDE, floppy, USB
Yes, + sound
P6SBXT (Libra)
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Celeron
440 BX
Award
4 PCI/2 ISA
768 Mb
2 EIDE, floppy, USB
AGP
Notes
Description
ATX
Pentium II/Celeron
440 EX
Award 4.51PGMA
4 PCI/3 ISA
256 Mb
Notes
Slot 1
66-100 MHz
P6EX-A+
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Slot 1
66-133 MHz
2 EIDE, floppy, USB
AGP
P6EXP-Me (Robin)
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Celeron
440 EX
Award
3 PCI/1 ISA
256 Mb
2 EIDE, floppy, USB
AGP
Notes
Socket 370
66-133 MHz
P6FX1-A
Jumper
JP4
Position
1-2
2-3
Function
5v Flash BIOS
12v Flash BIOS
209
210
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J13
J13
Position
3-4,5-6
1-2,7-8
9-10,11-12,13-14,15-16
11-12,13-14,15-16
9-10,13-14,15-16
13-14,15-16
9-10,11-12
Function
60 MHz Host Clock
66 MHz Host Clock
Host Clock x2
Host Clock x2.5
Host Clock x3
Host Clock x3.5
Host Clock x4
P6FX1-B
Jumper
JP3
JP4
J13
J13
J13
J13
VID Enable
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
Position
Short
1-2
2-3
3-4,5-6
1-2,7-8
9-10,11-12,13-14,15-16
11-12,13-14,15-16
9-10,13-14,15-16
13-14,15-16
9-10,11-12,15-16
17-18, 19-20, 21-22,23-24
VID O
17-18
open
short
open
short
open
short
open
short
open
short
open
short
open
short
open
short
VID 1
19-20
open
open
short
short
open
open
short
short
open
open
short
short
open
open
short
short
Function
Clear CMOS
Clear password
Normal
60 MHz Host Clock
66 MHz Host Clock
Host Clock x2
Host Clock x2.5
Host Clock x3
Host Clock x3.5
Host Clock x4
Open for CPU with VID enabled. Otherwise see table
VID 2
21-22
open
open
open
open
short
short
short
short
open
open
open
open
short
short
short
short
VDI 3
23-24
open
open
open
open
open
open
open
open
short
short
short
short
short
short
short
short
Case Connections
SMI switch
Power LED
Keyboard lock
Speaker
4-5
11-13
14-15
17-20
P6FX2
Dual Pentium Pro
Jumper
JP2
JP4
Position
1-2
1-2,3-4
1-2
2-3
None
JP8
1-2,3-4,5-6,7-8
Function
Clear CMOS
50 MHz host frequency
66 MHz host frequency
60 MHz host frequency
55 MHz host frequency
2x CPU
E
Jumper
J13
Position
3-4,5-6,7-8
1-2,5-6,7-8
5-6,7-8
1-2,3-4,7-8
1-2
Function
2.5x CPU
3x CPU
3.5x CPU
4x CPU
Clear password
Case Connections – J8
Power LED
SMI switch
Power LED
Keyboard lock
Speaker
2-3
4-5
11-13
14-15
17-20
P6LX-A+
Keyboard on-now feature turned off by disabling JP1.
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Celeron
440 LX
Award 4.51PGMA
4 PCI/3 ISA
1024 Mb
2 EIDE, floppy, USB
AGP
Notes
Description
ATX
Pentium II/Celeron
440 BX
AMI
3 PCI/2 ISA
1024 Mb
2 EIDE, floppy, USB
AGP
Notes
Slot 1
66-100 MHz
P6SBU
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Slot 1
66-100 MHz
P6SEP-Me (Eagle)
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
Micro ATX
Notes
Socket 370
SiS 620/5595
Award
3 PCI/1 ISA
3844 Mb
2 EIDE, floppy, USB
AGP
66-133 MHz
SA486P AIO-U
Item
Chipset
Cache (K)
I/O
Description
Saturn
IDE, NCR SCSI
Notes
May hang if set to write-back
SMC 37C665 I/O controller - check for GT at end of model no, to fix crashes using comms programs.
SCSI controller may need IRQ 15.
211
212
The PC Engineer’s Reference Book – Vol 2: Motherboards
SC58P VIO/S
Jumper
J9
JP3
JP11
JP13
JP14
JP17
JP19
JP21
JP22
Position
1-2
2-3
Short
Open
1-2
2-3
1-2
2-3
1-2
3-4
1-2,3-4
Open
1-2
1-2,3-4
3-4
1-2
3-4
1-2
2-3
1-2
2-3
Function
Normal
Clear CMOS
Enable
Disable
BIOS program 12v
BIOS Not Program Mode (5v)
256K cache
512K cache
50 MHz host clock
60 MHz host clock
66 MHz host clock
CPU 1.5x
CPU 2x
CPU 2.5x
CPU 3x
3.3v CPU
3.525v CPU (VRE)
Normal floppy
Write protect
CPU non-linear mode (Intel)
CPU linear mode (Cyrix)
SI54P AIO
Pentium.
Jumper
JP1-2
JP3
JP4
JP5
JP7
JP8
JP9
JP10,11
JP12
JP14
Position
JP1
1-2
2-3
1-2
2-3
Open
Short
1-2,3-4
2-3
2-3,5-6,7-8
2-3,4-5,8-9
1-2,5-6,7-8
Open
1-2
2-3
Short
Open
JP10
Open
Open
Short
1-2
2-3
1-2
2-3
JP2
2-3
1-2
JP11
Open
Short
Short
Case Connections – J13
Turbo LED
SMI switch
Turbo switch
Reset switch
2-3
4-5
6-7
9-10
Function
ECP Mode
Parallel Port DRQ1 DACK1
Parallel Port DRQ3 DACK3
Enable onboard I/O
Disable
Enable onboard PCI IDE
Disable
Double density memory (or 1&2 single)
All single density memory
50 MHz host clock speed (1.5x CPU)
60 MHz host clock speed (1.5x CPU)
66 MHz host clock speed (1.5x CPU)
System ROM is EPROM or Normal use
System ROM is 5v Flash ROM
System ROM is 12v Flash ROM
Enable DRAM parity check
Disable
L2 cache
256K (32Kx8)
512K (64Kx8)
1 Mb (128Kx8)
L1 cache write-back
L1 cache write-through
CPU Signal Select always invalidated
CPU Signal Select write to invalidated
E
Power LED
Keyboard lock
Speaker
11-13
14-15
17-20
SI5PI AIO
Pentium. Rev 1.0 has parity checking always enabled. Rev 1.0a has parity checking always disabled, so
can use parity or non-parity DRAM. Rev 1.1 uses JP22 to set parity checking.
Jumper
JP1
JP2
JP4
JP5-7
JP8
JP9-10
JP11
JP13-16
JP19
JP20
JP21
JP22
Position
1-2
2-3
Open
Short
1-2,3-4
2-3
JP5
1-2
2-3
Open
Short
JP9
2-3
1-2
1-2,5-6
2-3,4-5
JP13
Open
Open
Open
Short
Short
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JP6
2-3
1-2
JP7
1-2
2-3
JP10
1-2
2-3
JP14
Open
Short
Short
Short
Short
JP15
Open
Open
1-2
2-3
1-2,3-4
JP16
1-2,3-4
2-3,4-5
1-2,3-4
2-3,4-5
1-2,3-4
Function
Enable onboard multi I/O
Disable
Enable IDE
Disable IDE
Double density memory used
Single density memory only
CPU Clock
60 MHz
66 MHz
Normal LPT mode
ECP mode
Parallel Port ECP PRQ & DACK
DRQ1, DACK1
DRQ3, DACK3*
12v Flash ROM
EPROM
L2 cache setting
256K (32Kx8 in Bank 0)
512K (32Kx8 in Bank 0&1)
512K (64Kx8 in Bank 0)
1 Mb (64Kx8 in Bank 0&1)
1 Mb (128Kx8 in Bank 0)
L1 writeback
L1 writethrough
CPU Signal Select always invalidated
CPU Signal Select write to invalidated
LPT IRQ7
LPT IRQ5
Enable parity check (v1.1 only)
Disable
SI55P AIO
P54C
Jumper
JP1
JP2
JP3
JP4,6
JP5-7
JP8
Position
Open
Short
5-6,7-8
Open
1-2
2-3
JP4
1-2
2-3
JP5
1-2
2-3
Enable
JP6
1-2
2-3
JP6
2-3
1-2
JP7
1-2
2-3
Function
Enable onboard multi I/O
Disable
IR normal COM2/4
IR front connector
5v EPROM
12v Flash ROM
Parallel Port ECP PRQ & DACK
DRQ1, DACK1
DRQ3, DACK3
CPU Clock
60 MHz
66 MHz
Enable DRAM parity check
213
214
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP14-16
JP17
JP18-19
J15
JP21-22
JP25-26
Position
JP14
2-3
1-2
1-2
3-4
5-6
JP18
2-3
2-3
1-2
6-7,21-22
JP21
Open
Open
Short
Short
JP25
Short
Open
Short
JP15
2-3
1-2
JP19
2-3
1-2
1-2
JP22
Open
Short
Short
Open
JP26
Open
Short
Short
JP16
2-3
1-2
Function
SRAM
3.3v
3.3/5v mixed
3.3v CPU voltage (STD)
3.385v CPU voltage (VR)
3.525v CPU voltage (VRE)
L2 cache size
256K (32Kx8)
512K (64Kx8)
1 Mb (128Kx8)
Always set
CPU clock multiplier
1.5x
2x
2.5x
3x
Host clock speed
50 MHz
60 MHz
66 MHz
Case Connections – J12
SMI switch
Reset switch
Power LED
Keyboard lock
Speaker
4-5
9-10
11-13
14-15
17-20
SI56P AVIO
Jumper
JP1,2
JP6,7
JP11
JP12,13
JP15
JP16
JP22,24
JP25
JP26
JP27
Position
JP1
1-2
2-3
JP6
1-2
2-3
2-3
Open
Short
JP12
1-2
2-3
1-2
3-4
1-2,3-4
1-2
3-4
5-6
JP22
Open
Open
Short
Short
1-2
2-3
Short
Open
Short
Open
JP2
1-2
2-3
JP7
1-2
1-2
2-3
JP13
1-2
2-3
JP24
Open
Short
Short
Open
Function
Mixed/Pure cache
Pure
Mixed
Cache size
256K
512K
1 Mb
Enable super I/O
Disable
ECP Mode
DRQ1/DACK1
DRQ3/DACK3
50 MHz host clock
60 MHz host clock
66 MHz host clock
3.3v CPU voltage (STD)
3.385v CPU voltage (VR)
3.525v CPU voltage (VRE)
Clock multiplier
1.5x
2x
2.5x
3x
5v Flash voltage
12v Flash voltage
Clear CMOS
Normal
Enable onboard VGA
Disable
E
Case Connections – J16
Turbo LED
SMI switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
9-10
11-13
14-15
17-20
SL 486E
EISA 486
Jumper
JP1,2
JP3,4
JP5
JP6
JP7
JP8-10
JP11
JP12
JP13
JP14
JP20
Position
JP1
1-2
1-2
2-3
JP3
1-2
2-3
2-3
1-2
2-3
1-2
3-4
5-6
1-2
2-3
JP8
2-3
1-2
2-3
1-2
2-3
Closed
Open
1-2*
Close
Open
1-2 open
1-2 closed
JP2
1-2
2-3
2-3
JP4
1-2
1-2
2-3
JP9
2-3
1-2
2-3
JP10
1-2
1-2
1-2
Function
ALT Bit selection
64K
128K
256K
Cache size
64K
128K
256K
8Kx8 SRAM
32Kx8 SRAM
One bank SRAM
2 banks 8Kx8 SRAM
2 banks 32Kx8 SRAM
CPU <50 MHz
CPU 50 MHz
CPU type
486DX
486SX
487SX
Bus cycle pending, 85C406 system arbitration logic bypasses CPU
System arbitration logic in 85C406 includes CPU
Local bus memory slaves can receive burst cycles
Non-burst mode
Refresh signal selection
Mono display
Colour display
Turbo
Normal speed
TR 5510 AIO
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
JP1
JP2
Description
Baby AT
Pentium P54C(T)(B)
75-166
Intel 430FX or UMC
Award Flash
4 PCI/3 ISA
4-128
512
2S, 1P, floppy, 2 EIDE
Position
1-2*
Open*
Notes
4 layer
FPM/EDO. 4 72-pin SIMM.
256 standard
Function
Enable Onbard I/O
Normal CMOS
215
216
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
Short
1-2
2-3
Open
1-2
3-4
1-2,3-4
Open
1-2
1-2,3-4
3-4
JP12
1-2*
2-3
6-7,21-22
1-2
3-4
5-6
1-2
2-3
Open
1-2
2-3
JP7
1-2
2-3
Open
JP3
J4
J8
JP12,13
J13
JP17
JP19
JP23
JP7,21,22
JP13
1-2*
2-3
JP21
2-3
1-2
Open
JP22
1-2
2-3
Open
Function
Clear CMOS
System clock PCI clock/3
System clock PCI clock/4*
50 MHz Host clock
55 MHz Host clock (IMI604 U10)
60 MHz Host clock
66 MHz Host clock
1.5x CPU
2x CPU
2.5x CPU
3x CPU
SRAM voltage
5v (mixed SRAM)
3.3v (pure 3.3v or PB SRAM)
VRM connector - all CPUs
3.52v CPU
3.38v CPU*
3.3v CPU
Tag installed for PB SRAM module
Tag not installed for PB SRAM module – install Std SRAM at U17
Page mode flash BIOS*
5v flash program voltage
12v flash program voltage
Cache size (standard SRAM)
256K*
512K
256/512K (PBSRAM)
Case Connections – J12
Turbo LED
SMI switch
Turbo switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
6-7
9-10
11-13
14-15
17-20
TS 54P AIO
Jumper
JP1
JP4
JP5,10
JP6,27
JP7
JP8,9
J12
Position
1-2
2-3
Open
1-2
3-4
1-2,3-4
JP5
Open
Short
Short
Open
JP6
Open
1-2,3-4
1-2
2-3
JP8
1-2
2-3
5-6,7-8
JP10
Open
Open
Short
Short
JP27
Open
1-2,3-4
JP9
1-2
2-3
Function
Pure 3.3v cache
Mixed 5/3.3v cache
50 MHz host
55 MHz host (U22 uses IMI 604 only)
60 MHz host
66 MHz host
Clock multiplier
1.5x
2x
2.5x
3x
CPU voltage
3.3v (from power supply)
3.3v (from onboard regulator)
Enable onboard I/O
Disable
ECP DMA (SMC37C665GT only)
DMA1
DMA3
IR normal COM2/4
E
Jumper
JP15
JP20-24
JP25
JP26
JP28
JP50
Position
Open
Open
Short
JP20
JP21
1-2
1-2
1-2
1-2
2-3
1-2
1-2
2-3
2-3
1-2
1-2
3-4
5-6
1-2,3-4,5-6,7-8
Open
JP22
1-2
2-3
2-3
JP23
2-3
2-3
1-2
JP24
1-2
1-2
2-3
Function
IR connector
Normal
Clear CMOS
L2 cache size
256K PBSRAM (U17, U18)
256K Standard SRAM (U9-16)
512K Standard SRAM (U9-U16)
L1 cache write back
L1 cache write through
System clock PCICLK/4
System clock PCICLK/3
3.14-3.46v
3.3-3.46v
3.45-3.6v
U25 not installed
U25 installed
Case Connections – J11
Turbo LED
SMI switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
9-10
11-13
14-15
17-20
UA 4982
Jumper
JP1
JP3
JP4-6
10-13
JP7-9
JP14-19
JP20-22
JP24
JP25
Position
1-2
2-3
Open
Short
JP4
1-2
1-2
1-2
JP7
Short
Short
Short
Open
JP14
Open
Open
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
Open
2-3
2-3,4-5
JP20
1-2
2-3
2-3
Open
Short
Open
JP5
1-2
1-2
2-3
JP8
Open
Short
Short
Open
JP15
2-3
1-2,3-4
2-3
1-2,3-4
1-2,3-4
1-2,3-4
2-3
1-2,3-4
2-3
JP21
1-2
2-3
2-3
JP6
Open
1-2
2-3
JP9
Open
Short
Open
Short
JP16
Open
1-2
Open
1-2
1-2
1-2
3-4
1-2
Open
JP22
Open
1-2
2-3
JP10
Open
Open
1-2
JP11
Open
Open
Short
JP17
Open
Open
5-6
5-6
3-4,5-6
5-6
1-2
2-3,4-5
2-3,4-5
JP18
2-3
2-3
1-2
1-2
1-2,4-5
1-2
2-3
1-2,3-4,5-6
1-2,3-4,5-6
JP12
Open
Open
Open
JP13
Open
Short
Short
JP19
Open
Open
1-2
1-2
1-2,4-5
1-2
2-3
1-2,3-4
1-2,3-4,5-6
Function
5v Flash ROM
12v Flash ROM
External keyboard control
Internal keyboard control
Cache size
128K (32Kx8)
256K (64Kx8)
512K (128x8)
CPU speed
25 MHz
33 MHz
40 MHz
50 MHz
CPU Type
486SX/SX2
486DX/DX2/AmDX4
486SX/SX2 (SL)
486DX/DX2 (SL)
486DX2 (P24D) L1 wb
Intel 486DX4
UMC U5-S Super
Cyrix 486DX/DX2(M7)
Cyrix 486S(M6)
CPU voltage
5v
3.45v
3.3v
DX4 internal clock x 3
DX4 internal clock x 2
Local bus <=33 MHz
217
218
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP26
JP100,102
102,300
JP400
Position
Short
Open
Short
Short
Open
Open
Short
Function
Local bus >33 MHz
Local bus write 0 wait state
Local bus write 1 wait state
Cyrix DX2-50
Other CPUs
AMD DX4 3x clock
AMD DX4 or DX2802x
Case Connections – J90
Turbo LED
SMI switch
Turbo switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
6-7
9-10
11-13
14-15
17-20
UC 4913
Jumper
JP1
JP2
JP7
JP9,10
JP11
JP12
JP13
15-17
JP18
JP19-21
JP23
Position
Open
Closed
Open
Closed
1-2,3-4
2-3
JP9
Short
Open
Short
Open
1-2
2-3
Open
Closed
JP13
Open
2-3
1-2
1-2
2-3
JP19
1-2
2-3
1-2
2-3
JP10
Short
Short
Open
Open
JP15
Open
Open
Short
JP16
1-2
2-3
1-2
JP20
2-3
1-2
JP21
2-3
1-2
JP17
Open
Short
Short
Function
Local Bus Write 0 wait state
Local Bus Write 1 wait state
Local Bus Speed <=33 MHz
Local Bus Speed >33 MHz
80486DX, DX2, P23T, AMD 486DX, M6/C6 module
80486SX, M6, AMD486SX
CPU Clock
25 MHz
33 MHz
40 MHz
50 MHz
Mono display
Colour
486PQFP
486PGA
Cache size
64K
128K
256K
Weitek Power 9000 VESA VGA card not installed
Weitek Power 9000 VESA VGA card installed
C6 coprocessor
Present
Absent
CPU clock 50 MHz
CPU clock <=40 MHz
UC 4980
Jumper
JP1
JP3
JP4-6
10-13
Position
Open
1-2
2-3
Open
Short
JP4
1-2
1-2
2-3
2-3
JP5
1-2
1-2
2-3
2-3
JP6
Open
1-2
Open
2-3
JP10
Open
Open
Open
Open
JP11
Open
Open
Open
Short
JP12
Open
Open
Open
Open
JP13
Open
Short
Short
Short
Function
Normal EPROM
5v Flash ROM
12v Flash ROM
External keyboard control
Internal keyboard control
Cache size
128K (32Kx8x4)
256K (64Kx8x4)
256K (32Kx8x8)
512K (64Kx8x8)
E
Jumper
JP7-9
JP14-19
JP20-22
JP24
JP25
JP26
Position
1-2
2-3
JP7
Short
Short
Short
Open
JP14
Open
Open
1-2,3-4
1-2,3-4
1-2,3-4
2-3,4-5
2-3
Open
Open
1-2,3-4
JP20
1-2
2-3
2-3
Open
Short
Open
Short
Open
Short
2-3
2-3
JP8
Open
Short
Short
Open
JP15
2-3
1-2,3-4
2-3
1-2,3-4
1-2,3-4
2-3
1-2,3-4
2-3
1-2,3-4
1-2,3-4
JP21
1-2
2-3
2-3
2-3
2-3
JP9
Open
Short
Open
Short
JP16
Open
1-2
Open
1-2
1-2
Open
1-2
3-4
1-2,3-4
1-2
JP22
Open
1-2
2-3
1-2
2-3
Short
Short
JP17
Open
Open
5-6
5-6
3-4,5-6
2-3,4-5
2-3,4-5
1-2
1-2
5-6
JP18
2-3
2-3
1-2
1-2
1-2,4-5
1-2,3-4,5-6
1-2,3-4,5-6
2-3
2-3
1-2
Open
Short
Short
Short
JP19
Open
Open
1-2
1-2
1-2,4-5
1-2,3-4,5-6
1-2,3-4
2-3
2-3
1-2
Function
512K (128x8x4)
1Mb (128Kx8x8)
CPU speed
25 MHz
33 MHz
40 MHz
50 MHz
CPU Type
486SX/SX2
486DX/DX2
486SX/SX2 (SL)
486DX/DX2 (SL)
486DX2 (P24D) L1 wb
Cyrix 486S(M6)
Cyrix 486DX/DX2
UMC U5-S Super
AMD DXL/DXL2
Intel 486DX4
CPU voltage
5v
3.45v
3.3v
DX4 internal clock x 3
DX4 internal clock x 2
Local bus <=33 MHz
Local bus >33 MHz
Local bus write 0 wait state
Local bus write 1 wait state
UM486V
Jumper
JP13
JP15
JP16
JP18-21
JP22,23
27,28
JP24
JP14-15
Position
1-2
2-3
Short
Open
Short
Open
JP18
Short
Open
Open
JP22
1-2
2-3
1-2
Open
Short
JP25
1-2,3-4
2-3
1-2,3-4
JP19
Short
Short
Open
JP23
Open
Open
Short
JP26
1-2
Open
2-3
JP20
Open
Open
Open
JP27
Open
Short
Short
JP21
Open
Open
Open
JP28
1-2
2-3
2-3
Function
Mono display
Colour
VESA ID2 CPU speed > 33 MHz
VESA ID2 CPU speed <= 33 MHz
VESA ID3 1 wait state write
VESA ID3 0 wait state write
CPU clock
25 MHz
33 MHz
50 MHz
Cache size
64K
128K
256K
Enable 486SX PQFP setting
Disable
CPU Type
80486DX (DX2)
80486SX
80487SX (Overdrive)
UM 4980
Jumper
JP1
Position
Open
1-2
Function
Normal EPROM
5v Flash ROM
219
220
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP3
JP4-6
10-13
JP7-9
JP14-19
JP20-22
JP24
JP25
JP26
Position
2-3
Open
Short
JP4
1-2
1-2
2-3
2-3
1-2
2-3
JP7
Short
Short
Short
Open
JP14
Open
Open
Open
1-2,3-4
1-2,3-4
1-2,3-4
2-3,4-5
2-3
Open
1-2,3-4
JP20
1-2
2-3
2-3
Open
Short
Open
Short
Open
Short
JP5
1-2
1-2
2-3
2-3
2-3
2-3
JP8
Open
Short
Short
Open
JP15
2-3
1-2,3-4
1-2,3-4
2-3
1-2,3-4
1-2,3-4
2-3
1-2,3-4
2-3
1-2,3-4
JP21
1-2
2-3
2-3
JP6
Open
1-2
Open
2-3
2-3
2-3
JP9
Open
Short
Open
Short
JP16
Open
1-2
1-2
Open
1-2
1-2
Open
1-2
3-4
1-2
JP22
Open
1-2
2-3
JP10
Open
Open
Open
Open
1-2
2-3
JP11
Open
Open
Open
Short
Short
Short
JP17
Open
Open
Open
5-6
5-6
3-4,5-6
2-3,4-5
2-3,4-5
1-2
5-6
JP18
2-3
2-3
2-3
1-2
1-2
1-2,4-5
1-2,3-4,5-6
1-2,3-4,5-6
2-3
1-2
JP12
Open
Open
Open
Open
Open
Short
JP19
Open
Open
Open
1-2
1-2
1-2,4-5
1-2,3-4,5-6
1-2,3-4
UM 4981
Jumper
JP2
JP3
JP5-6
JP8
JP9-11
JP22-25
JP26,40
Position
Open
1-2
2-3
1-2
JP5
1-2
2-3
Short
Open
JP9
Open
Short
Open
Short
JP22
2-3
1-2
2-3
JP26
JP6
1-2
2-3
JP10
Open
Short
Short
Open
JP23
Open
1-2
2-3
JP40
JP11
Short
Short
Short
Open
JP24
Open
Open
Short
JP25
Open
Short
Short
JP13
Open
Short
Short
Short
Short
Short
Function
Normal EPROM
5v Flash ROM
12v Flash ROM
Enable onboard multi I/O
ECP Mode
DRQ1, DACK1
DRQ3, DACK3
Enable parallel port ECP mode
Normal mode
CPU clock
25 MHz
33 MHz
40 MHz
50 MHz
Cache size
64K (8Kx8 – 2 banks)
128K (32Kx8 – 1 bank)
256K (32Kx8 – 2 banks)
CPU Voltage
2-3
1-2
Function
12v Flash ROM
External keyboard control
Internal keyboard control
Cache size
128K (32Kx8x4)
256K (64Kx8x4)
256K (32Kx8x8)
512K (64Kx8x8)
512K (128x8x4)
1Mb (128Kx8x8)
CPU speed
25 MHz
33 MHz
40 MHz
50 MHz
CPU Type
486SX/SX2
486DX/DX2
AMD Am 486DX4
486SX/SX2 (SL)
486DX/DX2 (SL)
486DX2 (P24D) L1 wb
Cyrix 486S(M6)
Cyrix 486DX/DX2
UMC U5-S Super
Intel 486DX4
CPU voltage
5v
3.45v
3.3v
DX4 internal clock x 3
DX4 internal clock x 2
Local bus <=33 MHz
Local bus >33 MHz
Local bus write 0 wait state
Local bus write 1 wait state
E
Jumper
JP27
JP28
JP29
JP36
JP37,38
JP41
Position
Short
Open
VR100
Open
Short
Open
Short
Open
2-3
1-2
2-3
JP37
2-3
1-2
2-3
1-2
Open
Short
CPU Type
486SX/SX2
486DX/DX2
486DX/DX2 (SL)
486SX/SX2(SL)
486DX2 (P34D)
P24T
Am486DX4
Cx486S(M6)
Cx486DX/DX2(M7)
UMC U5S-Super
Function
5v (from power supply)
3.3v (from 3.3v power supply)
Others
VESA 0 wait state
VESA 1 wait state
CPU speed <=33 MHz
CPU speed >33 MHz
DX4 3x clock
DX4 2x clock
Enable Primary/Secondary IDE
Disable
Hard Disk Timing
Active time 15T, Cycle time 30T, Spd 1, 40/50 Mb
Active time 15T, Cycle time 19T, Spd 2, 25/33 Mb
Active time 9T, Cycle time 13T, Spd 3, <20 Mb or EIDE
Active time 18T, Cycle time 37T, Spd 0, <40 Mb/non-ATA
AMD 486DX2/DX4 3x clock
AMD 486DX2/DX4 2x clock
Open
1-2,3-4
Open
JP38
2-3
2-3
1-2
1-2
JP25
Open
Open
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
Open
2-3,4-5
2-3
2-3
JP31
Open
Open
5-6
5-6
3-4,5-6
5-6
1-2
2-3,4-5
2-3,4-5
4-5
JP32
2-3
2-3
1-2
1-2
1-2,4-5
1-2
2-3
1-2,3-4,5-6
1-2,3-4,5-6
2-3
JP35
Open
Open
1-2
1-2
1-2,4-5
1-2
2-3
1-2,3-4
1-2,3-4
3-4
JP36
Open
1-2
Open
1-2
1-2
2-3
1-2,3-4
Open
1-2
Open
JP37
2-3
1-2,3-4
2-3
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
2-3
1-2,3-4
2-3
JP38
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Case Connections – JP30
Turbo LED
SMI switch
Turbo switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
6-7
9-10
11-13
14-15
17-20
UM8810P AIO
Item
Form Factor
CPU
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Comments
Jumper
JP4,5
Description
¾ Baby AT
486
Green Phoenix
3 PCI/4 ISA
2-128
512
2S, 1P, IDE
Position
JP4
2-3
1-2
JP5
1-2
2-3
Notes
Intel/Cyrix, including Pentium Overdrive
Older versions 64 Mb, in 4 x 16 single-sided or 2 x 32 double-sided SIMMs
CMD chipset for IDE, SMC chip for built-in ser/par and UMC 888X for PCI.
Later versions have J41 removed for P24T PODP5V
Function
Parallel Port PRQ & DACK
DRQ1, DACK1
DRQ3, DACK3*
JP45
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
221
222
Jumper
JP6
JP8
JP10
JP12
JP17
JP25
JP29
JP30
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Open
1-2
2-3
1-2
All shorted
VR100/102 JP1 1-2
VR100/102 JP1 3-4
VR100/102 JP1 5-6
VR100/102 JP1 7-8
Open
Short
1-2
1-2,3-4,5-6
1-2,3-4
5-6
1-2
2-3
Open
Short
Open
Short
Cache Size
128K (32Kx8)
256K (32Kx8)
512K (64Kx8)
512K (128Kx8)
JP18
JP19
JP20
JP21
JP22
JP23
JP24
JP25
JP27
JP28
JP36
JP37
JP38
JP44
i486DX/DX2
A486 DX/2/4
NV8T
1-2,3-4
1-2
1-2
1-2
1-2
-
P24T
JP18
JP19
JP20
JP21
JP22
JP23
JP24
JP25
JP13
1-2
1-2,3-4
2-3
1-2
1-2
2-3
-
Function
System ROM is EPROM
System ROM is 5v Flash ROM
System ROM is 12v Flash ROM
Enable onboard multi I/O 37C665 (2-3 Disable)
5v CPU
3.3
3.45
3.6
4v CPU
Enable onboard IDE
Controlled by BIOS*
25 Mhz host clock speed
33 Mhz host clock speed
40 Mhz host clock speed
50 Mhz host clock speed
Am486 DX2/4 Nv8T 3x CPU clock*
Am486 DX2/4 Nv8T 2x CPU clock
i486DX4, AMD DX2/4 SV8B 3x CPU clock*
i486DX4, AMD DX2/4 SV8B 2x CPU clock
Normal operation
Clear CMOS
JP14
1-2
2-3
2-3
2-3
JP16
2-3
1-2
1-2
2-3
JP33
Short
Short
JP35
Short
Short
Short
i487SX
ODP
i486SX
DX/2/4 (SL)
ODPR
SX/2(SL)
1-2,3-4
2-2
1-2
1-2
1-2
-
2-3
1-2
1-2
1-2
1-2
-
1-2,3-4
1-2
1-2
2-3
2-3
1-2
2-3
2-3,4-5
1-2
1-2
1-2
-
2-3,4-5
1-2
1-2
1-2
-
CxDX/2/4
M7
Short
1-2,3-4
1-2
2-3
2-3
2-3
1-2
CxDX4
100GP4
Short
1-2,3-4
1-2
1-2,3-4
2-3
1-2
Cx486S
U5SD
U5S
Short
2-3
2-3
2-3
2-3
-
1-2,3-4
1-2,3-4
1-2
-
2-3
1-2,3-4
1-2
-
DX2/4(SL)
ADX2/4Sv8B
Cx5x86 100/120
Short
1-2,3-4
1-2
1-2,3-4
2-3
2-3,4-5
1-2
1-2
1-2
-
E
P24T
JP27
JP28
JP36
JP37
JP38
JP44
CxDX/2/4
M7
1-2
3-4
2-3
1-2
1-2
2-3
-
2-3
4-5
1-2
1-2
1-2
1-2
-
CxDX4
100GP4
2-3
4-5
1-1
1-2
2-3
-
Cx486S
U5SD
U5S
1-2
3-4
2-3
1-2
1-2
2-3
-
-
-
3-4
2-3
2-3
1-2
-
3-4
2-3
2-3
1-2
-
223
Case Connections – J11
Turbo LED
SMI switch
Turbo switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
6-7
9-10
11-13
14-15
17-20
UP 8812 AIO
Jumper
JP1
JP3
JP5
JP21
JP30
32-33
Position
Open
1-2
2-3
1-2
2-3
1-2
1-2,3-4,5-6
1-2,3-4
5-6
Short
Open
JP30
Open
1-2
3-4
5-6
7-8
L2 cache
128K (32Kx8 1 bank)
256K (32Kx8 2 bank)
256K (64Kx8 1 bank)
512K (64Kx8 2 bank)
512K (128Kx8 1 bank)
1 Mb (128Kx8 2 bank)
JP9
JP10
JP12
JP13
JP15
i486DX/DX2
A486 DX/2/4
NV8T
Open
Open
1-2
1-2
Open
JP32
1-2
2-3
2-3
2-3
2-3
JP6
Short
Short
Short
Short
Short
JP33
1-2
2-3
2-3
2-3
2-3
JP7
Short
Short
Short
Function
EPROM BIOS
5v Flash ROM
12v Flash ROM
Enable onboard multi I/O
Disable
25 MHz CPU
33 MHz CPU
40 MHz CPU
40 MHz CPU
50 MHz CPU
DX4 internal clock 2x
DX4 internal clock 3x
CPU voltage
5v
3.3v
3.45v
3.6v
4v
JP8
Short
JP14
1-2
2-3
JP19
1-2
2-3
1-2
2-3
JP24
2-3
1-2
2-3
1-2
2-3
1-2
DX/2/4 (SL)
ODPR
i486SX
(PGA)
i486SX
(SL)
PD5v (P24T)
Cx486S
(M6)
CxDX/2/4
M7
2-3
Open
1-2
1-2
Open
Open
Open
1-2
1-2
Open
Open
Open
1-2
1-2
Open
Open
Open
1-2
1-2
1-2
Open
Open
1-2
2-3
2-3
Open
Open
1-2
2-3
2-3
DX2/4(SL)
ADX2/4Sv8B
C5x86 100/120
1-2
Open
1-2
1-2
Open
224
The PC Engineer’s Reference Book – Vol 2: Motherboards
i486DX/DX2
A486 DX/2/4
NV8T
JP16
Open
JP17
Open
JP18
1-2
JP21
Open
JP23
Open
JP25
Open
JP26
1-2
JP27
Open
JP28
1-2,3-4
JP29
Open
*Short for AMD Am5x86-P75
DX/2/4 (SL)
ODPR
i486SX
(PGA)
i486SX
(SL)
PD5v (P24T)
Cx486S
(M6)
CxDX/2/4
M7
Open
1-2
2-3
Open
Open
1-2
1-2
Open
1-2,3-4
2-3,4-5
Open
Open
1-2
Open
Open
Open
Open
Open
2-3
Open
Open
1-2
2-3
Open
Open
1-2
Open
Open
2-3
2-3,4-5
Open
1-2
1-2
Open
Short
1-2
2-3
1-2
1-2,3-4
2-3,4-5
2-3
1-2
2-3
Open
Open
2-3
Open
2-3
2-3
1-2,3-4
2-3
1-2
2-3
Open
Open
2-3
1-2
2-3
1-2,3-4
1-2,3-4
DX2/4(SL)
ADX2/4Sv8B
C5x86 100/120
Open
1-2
2-3
Open*
Open
1-2,3-4
1-2
Open
1-2,3-4
2-3,4-5
Case Connections – J31
Turbo LED
SMI switch
Turbo switch
Reset switch
Power LED
Keyboard lock
Speaker
2-3
4-5
6-7
9-10
11-13
14-15
17-20
US 3486
Jumper
J3
JP1
JP2
W12-13
W2-9
Position
1-2
2-3
1-2
2-3
Short
W12
1-2,3-4
2-3
1-2,3-4
Cache size
64K
128K
256K
W13
1-2
Open
2-3
-
Function
Colour display
Mono
386 CPU
486 CPU
80387 installed Open =Not installed
CPU Type
80486DX (DX2)
80486SX
80487SX (Overdrive)
386
W2
W3
W4
Open
Open
Open
Open
Open
Short
Short
Short
Short
W5
Open
Short
Short
VESA 486
Jumper
JP1
JP4-7
JP8-11
JP12-13
JP14-15
Position
1-2
2-3
JP4
Short
Short
Open
JP8
Open
Short
Short
JP12
Open
Closed
JP14
1-2,3-4
2-3
JP5
Short
Open
Open
JP9
Open
Open
Short
JP13
Open
Closed
JP15
1-2
Open
JP6
Open
Open
Open
JP10
1-2
2-3
2-3
JP7
Open
Open
Open
JP11
1-2
2-3
1-2
Function
Mono display
Colour
CPU clock
25 MHz
33 MHz
50 MHz
Cache size
64K
128K
256K
VESA ID Selection
0 wait write
1 wait write
CPU Type
80486DX (DX2)
80486SX
W6
1-2
2-3
1-2
W7
Open
1-2
2-3
W8
1-2
2-3
2-3
W9
1-2
1-2
2-3
E
Jumper
Position
1-2,3-4
Function
80487SX (Overdrive)
2-3
VL 486
As for VESA 486
Edom International
www.edom.com. Refer also to Wintec.
EFA
www.efacorp.com www.efa.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0-00
1-00
1C-00
9
Motherboard
4DMS-HL3G
486 VIP
P54NPCI or P5/MP4
P5V580-AT-3
Code
AC
CC
HC
Motherboard
P5TVX-AT/P5V580-AT-C
P55T2PIO-B ver 2.07
P55T-PIO-B
EFAR
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-0B
Motherboard
EF 9417
Code
Motherboard
Elite Group
See ECS
Elonex
Award BIOS ID
The last two numbers of the BIOS part number.
Code
U
Motherboard
W14
Code
Motherboard
88C
Jumper
J2
J3
J4
J7
Position
In
Out
1-2
2-3
In
Out
1-2
2-3
Function
Enable NMIs
Disable NMIs
Enable IRQ3
Enable IRQ4
Enable reset
Disable reset
Enable COM2 2F8-2FF
Enable COM1 3F8-3FF
225
226
Jumper
J8
J10
J11
SW1
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
1-2
2-3
1-2
2-3
All out
All in
None
1-2,3-4
3-4
1-2,7-8
1-2,3-4,7-8
1-2,5-6,7-8
1-2,3-4,5-6,7-8
Function
Real clock time H240
Real clock time H340
Floppy A=720K, B=360K
Floppy A=360K, B=720K
Floppy A=360K, B=360K
Floppy A=720K, B=720K
2764 8K ROM
27512 64K ROM
27128 16K ROM
Mono display
80x25 colour display
40x25 colour display
EGA
88C
Jumper
J2
J3
J4
J7
J8
J9
J10
J12
J13
J17
J18
J19
J20
J21,23
J23
J27
J28
Position
In
Out*
In
Out
A
1-2
1-2
All out
All in
1-2
2-3*
1-2
2-3*
1-2
2-3*
1-2
2-3*
All out
1-2
2-3*
None*
1-2
1-2,3-4
In*
1-2*
2-3
1-2
2-3*
J21
Out
Out
1-2
None
B*
A,B
Out
In
B
1-2
3-4
J23
Out
In
1-2
Function
FDD secondary address 370-377h
FDD primary address 3F0-3F7h
Enable floppy controller card
Disable
Floppy settings
A=360K, B=360K
A=720K, B=720K
A=1.2 Mb, B=1.2 Mb
A=1.44 Mb, B=1.44 Mb
Reserved
HD address 324h
HD address 320h
HD firmware address CA00h
HD firmware address C800h
Onboard HD IRQ2
Onboard HD IRQ5
Enable COM2
Enable COM1
Disable
RTC address 240-25Fh
RTC address 340-35Fh
27128 ROM
27256 ROM
27512 ROM
Enable game port
LPT IRQ7
LPT IRQ5
Serial IRQ3
Serial IRQ4
Monitor type
Mono 80x25
Colour 40x25
Plug in EGA/VGA
Front panel LED
Disable parallel port
Parallel port I/O 3BC-3BFh
Parallel port I/O 378-37Fh
Mono display
Colour display
E
88S
Switch
S1
S2
S3
S4
S5,6
S7,8
Position
On*
Off
S5
On
Off
On
Off
S7
On
Off
On
Off
S6
On
On
Off
Off
S8
On
On
Off
Off
Function
Reserved
Maths copro not installed
8087-1 installed
Reserved
Reserved
Monitor type
Unused
40x25 colour
80x25 colour
80x25 Mono
Floppies
1 fitted
2 fitted
3 fitted
4 fitted
286C-12
Jumper
J1
J4
J5
J6
J12
J15
J18
SW1
S1-3
SW1
S4
Position
4
3
2
1
Out
In
1-2
2-3
2-3
1-2
1-2
2-3
1-2
2-3
S1
On
Off
On
On
On
On
Off
Off
Off
Off
On
Off
S2
S3
On
On
Off
Off
On
On
Off
Off
On
Off
On
Off
On
Off
On
Off
286C-100
Jumper
J5
J7
J8
J11
Position
1-2
1-2
1-2
2-3
1-2
Function
COM2 IRQ4
COM1 IRQ3
COM2 IRQ3
Mono display
CGA, EGA display
Function
Disable COM1
Disable LPT1
Disable COM2
Disable LPT2
System clock divided by 2 for slower I/O
I/O frequency synchronised with system clock
Clock input used directly
80287 divides clock input by 3
80287 synchronised to CPU
80287 synchronised to oscillator
Reserved
0 wait state
1 wait state
27256 EPROM
27128 EPROM
Memory (chips)
256K or less
1 Mb
256K (4 rows of 64K)
512K (2 rows of 256K)
640K (2 rows of 64K, 2 rows of 256K)
1 Mb (4 rows of 256K)
2 Mb (2 rows of 1 Mb)
640K (2 rows of 1 Mb)
2 Mb (2 rows of 1 Mb)
4 Mb (4 rows of 1 Mb)
Colour monitor
Mono monitor
227
228
Jumper
J14
J15
J16
J17
J22
J23
J24
J25
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
In
Out
In
Out
1-2
1-2
2-3
In
Out
1-2
2-3
In
Out
In
Out
Function
Enable COM1
Disable COM1
Enable COM2
Disable COM2
COM1 IRQ4
80287 clock direct
80287 divide by 3
Base memory 512/640K
Base memory 512K/1 Mb
80287 clock from system
80287 clock from 8234
32K BIOS (27256)
16 K BIOS (27128)
0 wait state
1 wait state
286m
Jumper
J1
J5
J6
J7
J11
J14
J16
J17
J18
J20
J27
SW1
S1-3
SW1
S4
SW2
S1-6
Position
1-10
2-9
4-7
3-8
5-6
1-2
2-3
In
Out
1-2*
2-3
1-2
2-3
1-2
2-3
In
Out
2-3
1-2
1-2
1-2
2-3
2-3
Out
Out
S1
S2
Off
Off
Off
Off
Off
On
On
Off
On
On
On
Off
Display Type
VGA
CGA 40x25
CGA 80x25
EGA 200 line
EGA 350 line
MGA
S3
Off
On
Off
Off
Off
Function
Disable floppy
Disable HD
Disable LPT1
Disable COM2
Disable COM1
Other BIOS
Phoenix BIOS
Same DRAM in memory banks
Different DRAM
Quiet bus enabled
Disabled
27256 EPROM (32K)
27128 EPROM (16K)
EGA monitor with digital output
Colour or Mono with digital output
Enable Onboard display
Disable Onboard display
80287-8 24M
80287-10 24M
80287-6 24M(20M)
No oscillator
10 MHz
6 MHz
Maths copro installed
Enable VGA IRQ9
Memory Size
512K (256K*2)
640K (256K*2+64K*2)
1 Mb (256K*4)
2 Mb (1Mb*2)
4 Mb (1Mb*4)
Enable external colour display
Enable external Mono display
S1
S2
S3
On
Off
On
Off
Off
On
Off
Off
Off
On
Off
Off
On
Off
Off
On
S4
S5
Off
Off
On
On
Off
On
Off
On
Off
On
E
Jumper
Position
MGA
Function
Off
Off
On
Off
286M-10TTL
Jumper
J1
J6
J7
J28
SW1
S1
SW1
S2
SW1
S3-5
SW1
S6
Position
All out
3-14
4-13
5-12
6-11
1-16 & 2-15
1-2
2-3
1-2
2-3
1-2
On
Off
On
Off
S3
On
Off
On
Off
On
Off
S4
On
On
Off
Off
S5
On
On
On
On
Function
Floppy primary address
Floppy secondary address
Disable COM1
Disable LPT2
Disable COM1 (2?)
Enable Onboard display
80287 clock input used directly
80287 clock input divided by 3
80287 clock from system
80287 clock from 8234
27256 EPROM (32K) 2-3 27128 EPROM (16K)
CPU speed ¼ of CLK 2
CPU speed ½ of CLK 2
I/O half speed
I/O full speed
Base Memory
256K
512K
640K
640+384K
Onboard colour display
Onboard Mono display
286M-12TTL
Jumper
J1
J6
J7
J14
J20
J28
SW1
S1
SW1
S2
SW1
S3-5
Position
2-15 In
5-12 In
6-11 In
3-14 In
4-13 In
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
On
Off
On
Off
S3
Off
On
Off
On
Off
On
Off
S4
On
Off
Off
On
On
Off
Off
S5
On
On
On
Off
Off
Off
Off
Function
Enable Onboard display
Disable LPT1
Disable COM1
Out- floppy primary address In - secondary
Disable COM2
80287 clock input used directly
80287 clock input divided by 3
80287 clock from system
80287 clock from 8234
0 wait state
1 wait state
80 ns DRAM
100 ns DRAM
27256 EPROM (32K)
27128 EPROM (16K)
¼ of CLK*2 (low)
½ of CLK*2 (high)
I/O half speed
I/O full speed
Memory Size
512K
640K
1 Mb
2 Mb
2 Mb
2 Mb
4 Mb
Off
229
230
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
SW1
S6
Position
On
Off
Function
Colour display
Mono display
286S-10
Switch
SW1
S1-2
SW1
S3
SW1
S4
Position
S1
On
On
Off
Off
On
Off
On
Off
S2
On
Off
On
Off
Function
Memory
Bank 0
256K
640K
512K
1 Mb
Colour display
Mono display
16Kx2 BIOS
32Kx2 BIOS
Bank 1
64-12
256-12
256-12
256-12
RAM
64-12
256-12
None
256-12
0-256K
0-640K
0-512K
0-512K 1-1.5 Mb
286S-12
Switch
SW1
S1-2
SW1
S3-4
W2
W4
W6
W7
Position
S1
Off
Off
On
S3
On
Off
On
Off
1-2
2-3
1-2
1-2
2-3
Out
In
S2
Off
On
S4
On
On
Off
Off
Function
CPU Speed
High (12/10 MHz) with I/O low (6/5 MHz)
High, with I/O High
Low, with I/O low
Memory
256K
512K
640K
640K
12 MHz 0 wait state (80 ns DRAM)
12 MHz 1 wait state (100 ns DRAM)
12 MHz
16Kx2 BIOS (27128)
32Kx2 BIOS (27256)
Mono display
Colour display
286S-120
Switch
J4,5
J11,3
SW1
S1-2
S3
S4
Position
J4
Out
In
Out
J11
1-2
2-3
2-3
2-3
S1
On
Off
On
Off
Off
On
J5
Out
Out
In
J3
1-2
5-6
3-4
7-8
S2
On
Off
Function
Wait state
0 wait state (fixed)
1 wait state (fixed)
0 or 1 (controlled by software)
Maths copro speed
12 MHz
10 MHz
8 MHz
4.77 or 6 MHz
EPROM size
32Kx2 (U51,52) or 32Kx2 and 32Kx3 (U53,54)
16Kx2 (U51,52) or 16Kx2 and BASIC ROM (U53,54)
1 Mb address 00000-9FFFF, 100000-15FFFF
512K at 00000-7FFFF or 1 Mb 00000-7FFFF, 100000-17FFFF
Mono display
Colour display
386B-25/33
Jumper
J1-3
Position
J1
J2
J3
Function
Cache board
E
Jumper
J6
J9
J10
J12
J15
Position
Out
1-2
2-3
In*
Out
1-2
2-3
1-2
2-3
In*
Out
1-2
Out
1-2
2-3
Out
Out
In
Function
Disabled
32K cache card
64K cache card
Onboard battery
External battery
64K EPROM
32K EPROM
Non-pipeline mode
Pipeline mode
Colour display
Mono display
Maths copro installed
386S
Jumper
J2
J3
Position
In*
Out
1-2 In
1-2 Out*
Function
Colour display
Mono display
Enable 80387
Disable
386s-16
Jumper
J1
J2
JP22
JP23
JP25
JP26
J28
J29,30
J32-34
Position
1-2
2-3
1-2
2-3
J29
1-2
2-3
2-3
J32
Out
1-2
1-2
J30
2-3
2-3
1-2
J33
Out
Out
In
J34
In
Out
Out
Function
Enable COM2 (2F8-2FF)
Disable
Enable COM1 (3F8-3FF)
Disable
Reserved
Reserved
Reserved
Reserved
Display type
EPROM
16Kx2=32K
32Kx2=64K
64Kx2=128K
Maths coprocessor
Not installed
80287
80387
386s-20
Jumper
J1
J3
J11
J16
J19
J20
J21-22
Position
In
Out
Out
In
1-2
2-3
All out*
1-2
2-3
J21
J22
Function
Old 80386
New 80386
Maths copro
Reserved
Mono display
Colour
CPU speed software changeable
Low speed
High speed
Asynchronous reset
Synchronous reset only
Maths coprocessor
231
232
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
In
Out
In
Out
Function
80387 installed
Not installed
S4
Off*
Off
On
Off
Function
Reserved
Keyboard controller pins 23&24 compatible with Phoenix 8242.
27512K EPROM
27256K EPROM
0E0000-0FFFFFh & FE0000-FFFFFFh (27512)
0F0000-0FFFFFh & FF0000-FFFFFFh (27256)
Mono & Hercules mode
Colour (EGA & VGA)
80387sx installed
Not installed
DRAM Type
100ns FPM (interleave enabled)
100ns FPM (interleave disabled)
Normal 100 ns
120 ns (1 wait state)
S4
Off*
Off
Function
Reserved
Keyboard controller pins 23&24 compatible with Phoenix 8242.
27512K EPROM
27256K EPROM
0E0000-0FFFFFh & FE0000-FFFFFFh (27512)
0F0000-0FFFFFh & FF0000-FFFFFFh (27256)
Mono & Hercules mode
Colour (EGA & VGA)
80387sx installed
DRAM Type
100ns FPM (interleave enabled)
120 ns (1 wait state)
386sx
Jumper
JP1
JP2
J2
J3
S1
S2
S3,4
Position
In*
1-2
2-3*
1-2
2-3*
Off
On
Off
On
S3
Off*
On
Off
Off
386SXB-16
Processor board
Jumper
J1
JP2
J2
J3
S1
S2
S3,4
Position
In*
1-2
2-3*
1-2
2-3*
Off
On
Off
S3
Off*
Off
386SXM-16
Jumper
JP1
JP5
JP7
JP8
JP9
JP15
Position
1-14
4-11
5-10
6-9
7-8
1-2
2-3
In
In*
In*
Out
1-2*
2-3
Function
Disable floppy
Disable COM2
Disable LPT1
Disable COM1
Disable HD
EGA digital output
Colour or Mono with digital output
Enable VGA IRQ9
Enable VGA
16-bit VGA
8-bit VGA
27256 EPROM
27512 EPROM
Switch 1
VGA
S1
On
S2
-
S3
-
S4
-
S5
-
E
S1
Off
Off
Off
Off
Off
Off
On
Off
On
Off
CGA 40x25
CGA 80x25
EGA 200 line
VGA 350 line
MGA
MGA
Reserved
Reserved
Reserved
Reserved
S2
On
On
Off
Off
Off
Off
On
On
Off
Off
S3
Off
Off
On
On
On
On
Off
Off
Off
Off
S4
Off
Off
On
On
Off
Off
Off
Off
Off
Off
S5
On
Off
On
Off
On
-
Switch 2
Switch
S1
S2
S3
S4
S5
S6,7
S8
Position
On*
Off
On
Off*
On
Off*
On
Off*
S6
Off*
On
Off
On
On
S7
Off*
Off
On
On
Function
EGA/VGA
Mono
Reserved
256K/1Mb DRAMs
Either type
Enables 384K
Disables 384K
1 Mb DRAMs used
256K DRAMs used
Memory banks used
1
2
3
4
Enable maths coprocessor
LT386SX/P
Jumper
J7
J8,9
J10
JP1
JP2
JP3
JP5,6
JP7
JP8,9
J10
Position
In*
Out*
1-2
2-3*
JP5
2-3*
1-2
Out*
JP8
1-2
Out*
Out
JP6
2-3*
1-2
JP9
1-2
Out*
Function
Enable floppy
System operation
Maths coprocessor
Keyboard controller pins 23&24 compatible with Phoenix 8242.
Reserved
Display I/O decoder address is 2FXh
Display I/O decoder address is 3FXh
EPROM size
27256K
27512K
Enable floppy
DRAM access time
120 ns (1 wait state)
100 ns FPM, interleave enabled)
80387SX installed
Switch 1
Switch
S1
S2-4
Position
On*
Off
S2
On
On
Off
Off
Function
PS/2 monitor or compatible
Analogue multi-frequency
S3
On
Off
On
Off
S4
On
On
On
On
Automatic configuration
MGA-locked
CGA-locked
EGA-locked
233
234
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
Position
On
On
Off
S2
On
On
S3
Off
Off
Function
VGA-locked
Switch 2
Switch
S1-3
S4
Position
S1
On
On
Off
On
Function
PS/2 monitor or compatible
Analogue multi-frequency
Timing registers write-protected
Not write-protected
PCSX20C
Jumper
J4
J5
J6
Position
Out
Out
Out
In
Out
In
1-2
2-3
2-3*
Out
1-2
2-3
J7
J9
J11
J12,17
Function
Reserved
Reserved
Colour VGA
Mono VGA
Non-interlaced monitor
Interlaced
Enable VGA
Drain CMOS
Retain CMOS
Disconnect battery
16K cache
64K cache
386V-33E
Jumper
JP1
JP2
JP3
JP5,6
SW1-4
Position
Out*
In
Out
In*
Out*
In
JP5
1-2
2-3*
On*
Off
JP6
1-2
2-3*
Function
AT-compatible mouse interrupt
PS/2 mouse interrupt
Enable 80387
Disable
Synchronise copro with CPU
Asynchronous
Keyboard type
PS/2
AT-compatible
Mono or Hercules display
CGE, EGA or VGA
386SXB/486B
Switch 1
Switch
S1-2
S3
S4
S5
Position
S1
On*
On
Off
On
Off
On*
Off
On*
S2
On*
Off
On
On
Function
Onboard VGA
VGA
EGA
CGA
MDA
Monitor scan rate 48-49KHz
Monitor scan rate less than 48KHz
Reserved
Slow address decode
Fast address decode
E
Switch
S6
Jumper
J1
J3
J4,7
J5,8,10
J6
J9
J12
J17,18
J19,23
J20
J21
J22
Position
On
Off*
Function
8-bit ROM data width
16-bit ROM data width
Position
1-2
2-3
J4
2-3
2-3
1-2
1-2
J5
2-3
1-2
2-3
1-2
2-3
1-2
2-3
2-3
2-3
1-2
2-3
1-2
J17
2-3
1-2*
2-3
J19
1-2
2-3
In*
Out
1-2*
J7
2-3
1-2
2-3
1-2
J8
2-3
2-3
1-2
1-2
2-3
2-3
1-2
Function
Connection for KB1 keyboard connector on CPU card
Enable or disable hardware with indivisual jumper settings
Automatic configuration with port address 3F3h
Parallel port
LPT2 (378)
LPT1 (3BC)
LPT3 (278)
Disable
Serial ports
COM1=UART1, COM2=UART2
Disable COM1, COM2=UART2
COM1=UART1, Disable COM2
Disable both
COM2=UART1, COM1=UART2
Disable COM2, COM1=UART2
COM2=UART1, Disable COM1
Enable floppy
2 floppies
Reserved
Enable hard disk
Disable Hard Disk
Video memory
44256x2
44256x4
44256x8
Onboard VGA
Disable VGA
Enable VGA
44256x4 or 44256x2
44256x8
Enable VGA IRQ9
J10
2-3
2-3
2-3
Out
1-2
1-2
1-2
J18
1-2
2-3*
2-3
J23
Out
1-2
Elpina
Ability Electron Co. www.ability-tw.com see Amptron
ENPC
www.enpc.com.tw www.enpcusa.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
BC
Motherboard
EP PT11
KL-21
Code
HC-00
Motherboard
EP PT11
235
236
The PC Engineer’s Reference Book – Vol 2: Motherboards
EPoX
Formerly Soltek. www.epox.com. See also Pronix
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
9C
9C-00
9C-00
0C-00
1C-00
1-00/02
3C
4C-00
AC
Motherboard
PP6-NF/NB
P55-IT
P55TV/TX/VX/VP
EP 58MVP3C-m
P55-TF
P55-IT
P54C-SP
P55-SA
GXA 486SPM
KP6-LA/PP6-NS (PPro)
Code
AC
AC-00
CC-00
EC
HC
IC
JC
KC
LC
MC
Motherboard
P55-TH/P54C-SP
P55TX2/BT/KV/VP
P55TV2
KP6-FX/FX2
P55-IT
P55-IT
P55-IT
P55-IT
P55-IT UMC I/O
P55-IT Winbond I/O
EP-3VCA2
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Audio
Description
ATX
Pentium III/Celeron
800/533
VIA Apollo Pro 133A
Award
5 PCI 1 ANR
768 Mb
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel, 2 EIDE, floppy
VIA VT82C686A
EP-3WXA4
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Description
ATX
Celeron
Intel 810
5 PCI
512 Mb
2 EIDE, floppy
Notes
Socket 370
UDMA/66
2 DIMM sockets
EP-6CXA2C
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Comments
Description
ATX
Pentium III/Celeron
820
Award 4.51PG
5 PCI/1 ISA
1024 Mb
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
AGP
Notes
Slot 1
UDMA/66 66-133
2 RIMM sockets
CMI8738 sound. Good performance
EP-6VBA
Item
Form Factor
Description
ATX
Notes
Notes
Socket 370
133 FSB
UDMA 66
3 DIMM sockets
E
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Comments
Description
Pentium III/Celeron
550
Via Apollo Pro Plus
Award 4.51PG
5 PCI/1 ISA
768 Mb
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
Notes
Slot 1
UDMA/66
3 DIMM sockets
AGP
2 year warranty
EP-GXB-M
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Xeon
Intel 440GX
5 PCI/2 ISA
2 Gb
2 EIDE, floppy USB, IR
Notes
SMP Slot 2
4 DIMM sockets
AGP 2x
EP-MVP3G2
Item
Form Factor
CPU
Cache
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium/K6
1 Mb
Via MVP3
Notes
5 PCI/2 ISA
768 Mb
2 EIDE, floppy USB, IR
UDMA/66
3 DIMM sockets
Super Socket 7
AGP 2x
P2-112A
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium III/Celeron
550/366
Via Apollo Pro
Award 4.51PG
5 PCI/2 ISA
384 Mb
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
P55-TH
Same as Astar P55-TH
P55-VP
Same as California Graphics Sunray VIA
Epson UK
Notes
Slot 1
124 MHz
3 DIMM sockets
AGP
Similar to Soyo SY-6BA+
237
238
The PC Engineer’s Reference Book – Vol 2: Motherboards
AX Portable
Jumper
J1,2
J3,4
J5
J6,7
J8,9
J10
S1,2
Position
J1
A
A
B
B
J3
A
A
B
B
A
B
J6
A
A
B
B
J8
A
A
B
B
In
Out
S1
Off*
Off
On
On
Function
J2
A
B
A
B
J4
A
B
A
B
J7
A
B
A
B
J9
A
B
A
B
S2
Off*
On
Off
On
Reserved
128K ROMs
512K ROMs
256K ROMs
640K base memory
Reserved
512K base memory
256K base memory
1 ROM wait state inserted
2 ROM wait states inserted
1 16-bit ext RAM wait state inserted
2 16-bit ext RAM wait states inserted
3 16-bit ext RAM wait states inserted
4 16-bit ext RAM wait states inserted
8 MHz 80287
Reserved
Reserved
Reserved
USA character set
Danish character set
No expansion RAM
Reserved
2 Mb expansion RAM
4 Mb expansion RAM
Switch 1
Switch
S1
S2
S3
S4
Position
Off
On
On
On
On
Off
Function
Normal LCD
Reverse video LCD
LCD greyscale switch 1
LCD greyscale switch 2
LCD display
CRT display
Position
On
Off
On
Off
On
Off
On
Off
On
On
Off
Function
External floppy select
Parallel printer port select
External floppy = A
External floppy = B
Enable COM2
Enable COM1
Double-width LCD fOnt
Normal width LCD fOnt
Enable internal video
Add-in video is colour
Add-in video is Mono
Switch 2
Switch
S1
S2
S3
S4
S5
S6
PC AX
Jumper
J1
Position
A-C*
B-C
Function
CPU clock 6/8/10
Inhibit
E
Jumper
J2,3
J4
J5,6
Position
J2
A-C*
B-C
A-C
B-C
A-C*
B-C
J5
A-C*
B-C
A-C
B-C
Function
J3
A-C
A-C
B-C*
B-C
J6
A-C*
A-C
B-C
B-C
Reserved
CPU clock as NPX clock (1/3)
8 MHz AS npx CLOCK
Reserved
2 wait cycles for EPROM access at 10 MHz
1 wait cycles for EPROM access at 10 MHz
Device access
4 wait cycles for ext 16-bit device access at 10 MHz
3 wait cycles for ext 16-bit device access at 10 MHz
2 wait cycles for ext 16-bit device access at 10 MHz
1 wait cycle for ext 16-bit device access at 10 MHz
PC AX2
Jumper
J1
J2,3
J4,5
Position
A
B
J2
B
A
B
A
J4
A
A
B
B
J3
B
B
A
A
J5
A
B
A
B
Function
1 wait cycle for EPROM access
2 wait cycles for EPROM access
Device access
4 wait cycles for ext 16-bit expansion bus DRAM
3 wait cycles for ext 16-bit expansion bus DRAM
2 wait cycles for ext 16-bit expansion bus DRAM
1 wait cycle for ext 16-bit expansion bus DRAM
NPX clock speed=8 MHz
Reserved
Reserved
NPX clock=2/3 CPU speed
PC AX3-25
Jumper
J1
J3,10
J5
J6
J7
J8
J9
Position
1-2
J3
1-2*
2-3
1-2
2-3
1-2*
2-3
1-2
2-3*
1-2
2-3
1-2*
2-3
J10
1-2*
2-3
Function
Enable HD
System clock speed
25 MHz
24 MHz
512K (Dip sw 8 must be Off)
256K (Dip sw 8 must be On)
CPU reset time 16CLK2
CPU reset time 256CLK2
82385 reset time as CPU (J6=1-2)
82385 reset time as system reset
IRQ 12 to mouse
IRQ 12 available to system bus
Enable password
Disable (reset)
Switches
Switch
S1,2
S3-7
Position
S1
Off
On
On*
S3
Off
On
S2
Off
Off
On*
S4
S5
S6
Off
Off
S7
Off
Off
Function
Base memory
256K
512K
640K
Bk3
Bk2
Bk1
1Mb
Bk0
1Mb
1Mb
Total
1Mb
2Mb
239
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
S8
S9
S10
Position
On
On
Off
On
On
On
On
On
On
On
Off
On
On
Off
Off
On
Function
Off
Off
Off
On
On
Off
Off
Off
On
On
On
Off
On
On
Off
On
On
On
Off
On
Off
On
On
On
On
On
PC Portable
Front Panel Switches
Switch
S1
S2,3
S4
Position
On
Off
S2
On
Off
On
Off
On
Off
S3
On
On
Off
Off
Function
Normal LCD
Reverse LCD
LCD Screen Mode
0
1
2
3
LCD
External CRT
Rear Panel Switches
Switch
S1
S2
S3
S4
Position
On
Off
On
Off
On
Off
On
Off
Function
External floppy
Parallel printer
External floppy is B
External floppy is A
1 floppy
2 floppies
Serial port is secondary (378-3FFh)
Serial port is primary (2F8-2FFh)
Jumpers
Jumper
J1
J2
J3
J4
Position
SHB
L
L
H
H
A
B
HSPD
Out
In
In
-V
In
In
Out
SHA
L
H
L
H
WSO
*
In
Out
EQ1
In
Out
In
Function
RAM Speed
125ns
250ns
375ns
500ns
64/128K System ROM
256K System ROM
0 wait states
0 wait states
1 wait state
CPU select
8088
8086
V20
Off
Off
On
Off
On
On
On
Off
On
On
1Mb
1Mb
4Mb
1Mb
1Mb
1Mb
1Mb
4Mb
1Mb
4Mb
4Mb
4Mb
1Mb
4Mb
4Mb
1Mb
1Mb
4Mb
4Mb
4Mb
4Mb
512K ROM
256K ROM
80ns DRAM, 4 wait states
100ns DRAM, 5 wait states
CGA monitor
Mono monitor
1Mb
1Mb
4Mb
1Mb
4Mb
4Mb
4Mb
1Mb
4Mb
4Mb
3Mb
4Mb
4Mb
6Mb
8Mb
9Mb
10Mb
10Mb
12Mb
16Mb
E
Jumper
J5
Position
Out
A
B
Out
Function
V30
Floppy LED installed
HD installed
PC
Switch
J1
J2,3
SW1
S1-5
S6,7
S8
S9
S10
Position
In
S1
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
S6
Off
On
Off
On
On
Off
Off
Off
S2
Off
Off
On
On
Off
Off
On
On
Off
Off
On
On
Off
S7
Off
Off
On
On
S3
Off
Off
On
On
On
On
Off
Off
Off
Off
On
On
On
S4
Off
On
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
PC+
Switch 1
Switch
S1
S2
S3
S4
S5,6
S7,8
Position
On
Off
Off
On
Off
On
S5
On
Off
On
Off
S7
On
Off
S6
On
On
Off
Off
S8
On
On
Function
A=360K
A=1.2Mb
Maths copro installed
Not installed
Reserved
Parallel is primary
Parallel is secondary
Display type
Internal video disabled
Colour mode 40x25
Colur mode 80x25
Mono
Floppies
1
2
Switch 2
Switch
S1
S2
Position
Function
Reserved
Reserved
S5
Off
On
On
On
On
On
On
On
On
On
Off
Off
Off
Function
8087 installed
Reserved
Total
256K
288K
320K
352K
384K
416K
448K
480K
512K
554K
576K
608K
640K
Display type
Mono
Colour 80x25
Colour 40x25
Reserved
1 floppy
2 floppies
Disable serial port
Serial port on RS232 card
241
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
S3
S4
S5
S6
S7
S8
J1,2
Position
Function
Reserved
Reserved
Enable parity checking
Disable parity checking
Reserved
Primary internal serial interface
Secondary internal serial interface
Enable internal serial interface
Disable internal serial interface
Off
On
Off
On
Off
On
J1
1-2
2-3*
J2
1-2
2-3*
Position
A
B
A
B
A
B
Function
Enable floppy
Disable floppy
Parity RAM not installed
Parity RAM installed
BIOS ROM 128/64K
BIOS ROM 256K
Invalid setting of DACKO of 8237
Valid setting of DACKO of 8237
PCE
Switch
J1
J2
J3
Switch 1
Switch
S1
S2
S3,4
S5,6
S7,8
Position
On
Off*
On*
Off
S3
On
Off
On
Off*
S5
On
Off
On
Off*
S7
On*
Off*
On
Off
S4
On
On
Off
Off*
S6
On
On
Off
Off*
S8
On*
On*
Off
Off
Position
S1
On
Off
On
Off*
S3
On
Off
On
Off*
S2
On
On
Off
Off*
S4
On
On
Off
Off*
Function
Unenhanced keyboard
Enhanced keyboard
NPX not installed
NPX installed
RAM Size
256K
512K
576K
640K
Display Type
Reserved
Colour 40x25
Colour 80x25
Mono
Floppies
1
2
3
4
Switch 2
Switch
S1,2
S3,4
Function
Disable parallel port
LPT3 IRQ7 enabled
LPT2 IRQ7 enabled
LPT1 IRQ7 enabled
Disable serial port
Disable serial port
COM2 IRQ3 enabled
COM1 IRQ4 enabled
E
EL2
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
Position
A*
A*
B
In*
A*
B
A
B
A
B
Function
Enable password
Auxiliary device has IRQ12
IRQ12 available to other devices
Reserved
HD I/O channel On
Reserved
Reserved
IRQ9 available to other devices
IRQ9 assigned to video
HMD549 default setting for 40 Mb HD
Other HDC-embedded HDs (20 Mb)
256K EPROM
512K EPROM
EL3-33
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
Position
A*
B
A*
B
In*
Out
A*
B
A*
B
A*
B
A
B*
JP11
Function
Enable password
Disable password
Auxiliary device has IRQ12
IRQ12 available to other devices
Reserved
HD I/O channel On
HD I/O channel Off
Reserved
Reserved
IRQ9 available to other devices
IRQ9 assigned to video
Enable HD
Disable HD
Enable internal VGA
Disable internal VGA
2 wait states of 16-bit device on exp bus
1 wait state
Reserved
EL3S
Jumper
JP1
Position
A
B
JP2
A*
B
JP3
JP4
JP5
JP6
JP7
A*
B
Function
Enable password
Disable password
To reset password set J1 to B and turn power Off, then On, then Off. Set J1 to A.
Auxiliary device has IRQ12
IRQ12 available to other devices
Reserved
Enable I/O channel assignment
Disable I/O channel assignment
Reserved
Reserved
IRQ9 available to devices in option slot
IRQ9 assigned to video
Position
A*
Function
NPX not installed
A*
B
CPU Board
Jumper
JP8
243
244
Jumper
JP9
JP10
JP11
JP12
JP13
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
B
A*
B
A*
B
A
B*
A
B*
Function
NPX installed
Enable HD
Disable HD
VGA colour enabled
VGA colour disabled
2 wait states of 16-bit device on exp bus
1 wait state
Reserved
256K ROM
512K ROM
Video Board
Jumper
JP1
JP2
JP3,4
Position
A
B
A
B
JP3
A
A
B
B
JP4
A
B
A
B
Function
Turbo disabled
Turbo enabled
Write buffer disabled
Write buffer enabled
Data Transfer Rate
16-bit
Reserved
Reserved
8-bit
EL3s+
Jumper
JP12
JP13
JP14
JP15
JP16
Position
A
B
A*
B
A*
B
Out*
Function
NPX not installed
NPX installed
Reserved
Video BIOS duplicated at C0000h
Not duplicated
Bus wait state for HD access=2
Bus wait state for HD access=1
DRAM parity Off
Multi I/O board
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
JP11
JPT
Position
A
B*
A
B*
A
B*
A
B*
Out*
In*
Out
A
B*
A
B*
Out
In*
Function
Disable HD
Enable HD
Disable ROM setup
Enable
Enable floppy write protect
Disable
Erase CMOS password
Enable CMOS password
Reserved
I/O channel ready On
I/o channel ready Off
Reserved
Reserved
DS1287 fitted
Not fitted
Video interlaced
Not interlaced
Reserved
Power supply auto fan control
Disable
E
EL4s
Jumper
JP12
JP13
JP14
JP15
JP16
JP17
JP18
Position
In
Out*
In*
Out
In*
Out
In*
Out
A*
B
A*
B
A*
B
Function
2 wait states of 16-bit device on exp bus
1 wait state
AT bus clock is ½ CPU clock
Enables JP15
20 MHz CPU
Reserved for 33 MHz 80486
AT bus clock is 1/3 CPU clock
AT bus clock is ¼ CPU clock
486SX
486DX
486SX
486DX
486SX
486DX
EISA TE/DE
Jumper
J1
4
2-3*
Function
Password Enabled
Equity 486SX/25+
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8-12
JP13,14
JP15
Position
A
B*
A
B*
A
B*
A*
B
A*
B
A*
B
A*
Memory
4 Mb*
8 Mb
9 Mb
10 Mb
12 Mb
16 Mb
JP13
A
B
B
A
B*
JP14
A
A
B
Equity 486DX2/50+
As for Equity 486SX/25+
Eupacomputer
Function
487SX installed
486SX installed
487SX NMI signal
486SX NMI signal
487SX FERRsignal
486SX FERR signal
Enable VGA
Disable
Power on password enabled
Disabled
Colour display
Mono display
Mouse enabled
JP8
JP9
JP10
B
B
B
B
B
B
A
B
B
A
A
B
A
B
A
A
A
A
Base Memory
640K*
512K
256K
Early I/O ready signal enabled
Normal I/O ready signal
JP11
B
A
A
A
A
A
JP12
A
A
A
A
A
A
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The PC Engineer’s Reference Book – Vol 2: Motherboards
www.eupacomputer.com
Eurone LA
www.eurone.com
M919
Item
Chipset
BIOS
Bus
I/O
Problems
Comments
Description
UMC 8881/8886
AMI WinBIOS
3 PCI/4 ISA/1 VESA
2S, 1P
Notes
Look for v1.5 or 3.4, or make sure cable pinouts are correct. Use identical Memory (Mb) SIMMs
Possibly manufactured by PC Chips. V 1.x same as Amptron DX-9500 and v3.x same as DX-9700.
Cache Settings
1 bank
512K
256K
128K
Config
128Kx8
64Kx8
32Kx8
JP8
1-2
1-2
1-2
JP8
3-4
3-4
3-4
JP8
5-6
5-6
JP8
7-8
JP9A
Off
Off
Off
JP9B
On
Off
Off
JP9C
On
On
Off
JP9D
On
On
On
2 banks
1024K
512K
256K
128K
Config
128Kx8
64Kx8
32Kx8
16Kx8
JP8
2-3
2-3
2-3
2-3
JP8
4-5
4-5
4-5
JP8
6-7
6-7
JP8
8-9
JP9A
On
Off
Off
Off
Everex
286
Jumper
SW1
S1,2
SW1
S3,4
SW2
S2,-4
W3
W12,13
W15
Position
S1
On
On
Off
Off
S1
On
On
Off
Off
S2
On
On
Off
On
Off
Off
On
W12
1-2
Off
On
S2
On
Off
On
Off
S2
On
Off
On
Off
S3
On
On
On
Off
On
Off
W13
1-2
S4
On
Off
On
Off
Off
Off
Function
8-bit slot wait states
3
4
5
3
16-bit slot wait states
0
1
2
0
Total RAM
512K
1Mb
2Mb
2.5Mb
2.5+Mb
4Mb
Adds wait state
Coprocessor speed
10 MHz copro
286/16 using 60 ns RAM
286/16 using 80 ns RAM
JP9B
On
On
Off
Off
JP9C
On
On
On
Off
JP9D
On
On
On
On
E
386 (Rev D)
Jumper
W3
W14
W15
W16
W17
Position
In
Out
In
Out
In
Out
In
Out
In
Out
Function
Maths copro installed
Not installed
STEP UP not installed
STEP UP installed
256Kx9 installed
1Mbx9 installed
512K base memory
640K base memory
Bus speed 6.7 MHz
Bus speed 10 MHz
386 (Rev E)
Jumper
W3
W14
W15
W16
W17
W20
W21
Position
In
Out
In
Out
In
Out
In
Out
In
Out
In
In
Out
Function
Maths copro installed
Not installed
STEP UP not installed
STEP UP installed
256Kx9 installed
1Mbx9 installed
512K base memory
640K base memory
Bus speed 6.7 MHz
Bus speed 10 MHz
Disable STEP UP parity checking
1 bank memory
2 banks memory
AGI 286-12
Jumper
W2
W3
W6
W7
W8
Position
6 In*
2 In*
3-4 In
3-4 Out
2-3*
2-3*
Function
8-bit access 6 wait-states
16-bit access 2 wait-states
512K RAM
1Mb RAM
Reserved
Reserved
AGI 386-12
Jumper
S1-8
J5
Position
Bootup Sequence
1Mb memory
8 MHz boot speed
16 MHz boot speed
Mono display
Colour display
1-2
2-3
Function
S1
Off
S2
On
S3
Off
S4
Off
Off
Off
Off
Off
10 MHz 80287
6 MHz 80287
AGI 386-20
Jumper
S1-4
Position
S1
On
Off
S2
On
On
S3
On
On
S4
On
On
Function
Mobo memory 32-bit card
1Mb + 0
1Mb + 4
S5
Off
N/A
N/A
N?A
N/A
S6
N/A
On
Off
S7
Off
On
S8
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
W1
W2
Position
Off
Off
1-2
2-3
1-2
2-3
Off
Off
On
Off
On
On
Function
1Mb + 8
1Mb + 14
4 wait states for 8-bit cycle
5 wait states for 8-bit cycle
2 wait states for 16-bit cycle
1 wait state for 16-bit cycle
EV 1800
Jumper
W1
S1-2
W2
S1-4
Position
S1
On
On
Off
Off
S1
On
Off
S2
On
Off
On
Off
S2
On
Off
S3
Off
On
S4
Off
On
S2
On
Off
S3
Off
On
S4
Off
On
Function
Total RAM
256K
512K
640K
1Mb
EPROM size
128K EPROM
256K EPROM
EV 1801
Jumper
W1
S1-4
W1
S5
W1
S6
W1
S7-8
W4
S1-4
W7,12
W8,11
W9
W10
W13
W14
Position
S1
On
Off
On
Off
Off*
S7
On
On
Off
Off
S1
On
On
Off
W7 (8-bit)
S8
On
Off
On
Off
S2
Off
On
Off
W12 (16-bit)
S3
On
Off
Off
1
2*
3
4
4*
5
6
W8
B
A
A
W11
B
A
B
A
On
On
Off
C
On
On
Off
B
On
Off
On
D
On
Off
On
S4
Off
On
Off
Function
EPROM size
128K EPROM
256K EPROM
Zero wat-state
16-bit wait-state set by W12
Reserved
Total RAM
256K
512K
640K
1Mb
Parallel Port
LPT1*
LPT2
Disable
Wait-state
1
2
3
4
5
6
Maths Coprocessor
5 MHz 80287
8 MHz 80287
10 MHz 80287
Reserved
Reserved
Reserved
COM1/3
COM1
COM3
Disable
COM2/4
COM2
COM4
Disable
E
Jumper
W16
Position
Function
Reserved
EV 1811
Jumper
SW1
S1-4
SW2
E2
S1-2
E3
E9
E12
E13
E20
E21-23
Position
S1
On
Off
S2
On
Off
S1
On
On
Off
Off
S2
On
Off
On
Off
E21
On
Off
E22
On
Off
S3
Off
On
E23
On
Off
E24
S4
Off
On
Function
EPROM size
128K EPROM
256K EPROM
Colour/Mono
Total RAM
256K
512K
640K
1Mb
Reserved
Reserved
Reserved
Reserved
Reserved
Hard/Floppy Disk Controller
Enable
Disable
Reserved
Step 286-12/16
Jumper
SW1
S1,2
SW1
S3,4
SW2
S2,-4
W3
W4-11
W12,13
W15
Position
S1
On
On
Off
Off
S1
On
On
Off
Off
S2
On
On
Off
On
Off
Off
In
W12
1-2
Out
In
In
S2
On
Off
On
Off
S2
On
Off
On
Off
S3
On
On
On
Off
On
Off
W13
1-2
Step 386/20/25/33
Jumper
P1
Position
In
Out
Function
256K cache
128K cache
S4
On
Off
On
Off
Off
Off
Function
8-bit slot wait states
3
4
5
3
16-bit slot wait states
0
1
2
0
Total RAM Bank 0
512K
1Mb
2Mb
2.5Mb
2.5Mb
4Mb
Adds wait state
Reserved
Coprocessor speed
10 MHz
286/16 using 60 ns RAM
286/16 using 80 ns RAM
286/12
Bank 1
256K
256K
1Mb
256K
1Mb
1Mb
256K
1Mb
256K
1Mb
249
250
The PC Engineer’s Reference Book – Vol 2: Motherboards
Step 386-20 (Rev D)
As for 386 (Rev D).
Step 386-20 (Rev E)
As for 386 (Rev E).
Step 386sx 20
Jumper
JP3
JP8
J9
Position
Out*
In
Out*
1-2
Function
Enable cache light
512K EPROM
256K EPROM
82C711 chip floppy selector
Tempo 286-16c
Jumper
JP2
JP4
JP5
JP9
Position
1-2,5-6,7-11
3-4,10-11
2-3,4-5
On*
Off
Function
Reserved
Reserved
Reserved
Enable video
Disable
Tempo 386sx
Jumper
P2-4
P5
P6
P7
P8
Position
P2
Out
In
Out
Out
In
Out
In
Out*
In*
Out
In*
Out
In*
P3
In
Out
Out
In
Out
Out
P4
In
In
In
Out
Out
Out
Function
Total RAM
512K
1Mb
2Mb
2Mb
4Mb
8Mb
ROM 3 wait-states
ROM 2 wait-states
0 wait states RAM Read
1 wait state RAM Read
0 wait state RAM Write
1 wait state RAM Write
Disable shadow RAM
Tempo 386-25/33c
Jumper
SW1
S1-2
JP1
JP2
Position
S1
On
Off
On
Off
1-2
5-6
Expert
www.expertcom.com
S2
On
On
Off
Off
Function
Monitor Type
Super multifrequency
Multifrequency
Super VGA
VGA, IBM, PS/2 and 8514
Floppy type
Enable IRQ2
Enable Onboard video
E
4045
Jumper
JP1-4
JP6
JP7-9
JP16
JP18,33
JP39
CPU
JP17
JP19
JP20
JP21
JP22
JP23
JP24
JP25
JP26
JP27
JP28
JP29
JP30
JP31
JP32
JP34
JP36
Position
JP1
Open
1-2
2-3
1-2
2-3
JP7
Open
Short
Open
Open
8-9
7-8
JP18
Open
Short
Short
Open
486SX
Open
1-2
Open
Open
Short
Open
open
1-2,3-4
Open
Open
2-3
Open
Open
Open
Open
Open
Open
JP2
Open
Open
Short
JP3
2-3
2-3
1-2
JP8
Open
Short
Short
JP9
Short
Short
Short
JP4
1-2
2-3
2-3
JP33
Open
Short
DX/DX2
Short
1-2
Open
Open
Short
Open
Open
1-2,3-4
Short
Open
1-2
Short
Short
Open
Open
Open
Open
486 Enh
Short
1-2
Short
Open
Short
Open
Open
1-2,3-4
Short
Open
1-2
Short
Short
Open
Open
Open
Short
Cyrix M6
Open
2-3
Short
2-3,4-5
2-3
Open
Open
2-3,4-5
Open
Open
2-3
Open
Open
Open
Open
Short
Short
Function
Cache Size
128K
256K
512K
Intel CPU
Cyrix CPU
CPU clock
25 MHz
33 MHz
40 MHz
CPU 3x
CPU 2.5x
CPU 2x
CPU voltage
3.3v (Q3 present)
5v (Q3 absent)
Colour display
Mono
Cyrix M7
Short
2-3
Short
2-3,4-5
Short
Open
Open
2-3,4-5
Short
Open
1-2
Short
Short
Open
Open
Short
Short
P24D
Short
1-2
Short
Open
Open
1-2
1-2
1-2,3-4
Short
Open
1-2
Short
Short
Open
Short
Open
Short
P24C
Short
1-2
Short
Open
Short
Open
Open
1-2,3-4
Short
Open
1-2
Short
Short
Open
Short
Open
Short
P24T
Short
1-2
Short
Open
Open
Open
Open
1-2,3-4
Short
1-2
1-2
Short
Open
Open
Short
Open
Short
251
252
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
F
Famous Technology
Magic pro. www.magic-pro.com.hk
Fentech
See Taemung/Fentech
Ferranti
2086
Links
Link
1
2
3
4
5
6
Position
On
Off
On
Off
On
Off
7
Function
512K
640K
CGA
Mono
Reserved
Not used
Not used
8 MHz
6 MHz
Always on
FIC
First International Computer. www.fica.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
00-00
Motherboard
486 PVT, VIP-IO/IO2, 486GVT2
Code
9C
Motherboard
PA 2012/VA 503+ or PA 2013
254
The PC Engineer’s Reference Book – Vol 2: Motherboards
Code
2C-00
8C
8C
9
9-00
Motherboard
PN 2000
PA 2005 (Vobis)/2006/VA501/2
PA 2007
PA 2002/2005
PA 2000
Code
9C
9C-00
H
H-00
HC-00
Motherboard
PA 2002/2005
PT 2006/2007/VT 530
PT 2003/PA 2000
PT 2000
PT 2000 or 2003/PA 2000
CPIIZ
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Celeron
Intel 440ZX
5 PCI/2 ISA
512 Mb
2 EIDE, floppy
Notes
Socket 370
UDMA/33
2 DIMM sockets
AGP
KA-6100
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Audio
Video
Performance
Description
AT
Pentium II/Celeron
VIA Apollo Pro
Award 4.51PGMA
3 PCI/2 ISA
768 Mb
2 EIDE, floppy, USB
Yamaha OPL3-6AX
Notes
Slot 1
1 each shared
3 DIMM sockets
AGP
Slow, but still faster than the ECS P6BX-A+
KA-6110
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Audio
Video
Description
ATX
Pentium II/Celeron
900
VIA Apollo Pro Plus
Award 4.51PGMA
5 PCI/2 ISA
1 Gb
2 EIDE, floppy, USB
Yamaha OPL3-6AX
Notes
Slot 1
If slot 1 survives
1 each shared UDMA/66 (33 cable)
4 DIMM sockets
AGP
PA-2012
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Video
Performance
Description
ATX
Pentium/K6
366 MHz
VIA VP3
4 PCI/2 ISA
384 Mb SDRAM
768 Mb EDO
1 Mb
Notes
Socket 7
3 DIMM sockets
AGP
Fast
F
SD11
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Athlon
AMD 751/VIS 686A
AMI
5 PCI/1 ISA
768 Mb
2 EIDE, floppy
Notes
Slot A
UDMA/66
3 DIMM sockets
AGP
Fast
VB-601
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium II/Celeron
450
440 BX
Award 4.51PGMA
5 PCI/2 ISA
1 Gb
2 EIDE, floppy, USB
Notes
Slot 1
1 each shared
4 DIMM sockets
AGP
Average
VL-601
Item
Form Factor
CPU
Speeds (MHz)
Bus
Memory (Mb)
Video
Performance
Problems
Description
ATX
Pentium II
333 MHz
5 PCI/2 ISA
384 Mb SDRAM
Notes
Slot 1
3 DIMM sockets
AGP
Bus speed 66 MHz. Fair performance.
Removal of SDRAM means removing AGP card.
Fine-Pal Company
www.finepal.com
Firenze
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
Motherboard
486 VL.VII
486 VL.VII
Maybe Genoa or Freetech models
Code
Motherboard
255
256
The PC Engineer’s Reference Book – Vol 2: Motherboards
First International Computer
See FIC
Fittec
www.spiderwebhk.com/fittec
FKI
See Fong Kai Industrial
Flagpoint
Some association with Vtech.
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
BC-00
Motherboard
FPM P5VX
Road Runner VIA 512K
Code
Motherboard
Flamingo
Something to do with Lucky Star?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
CC-00
FC
Motherboard
MB-FLM-TX01
5I-VX1C
Code
Motherboard
MB-FLM-TX01
Same as Lucky Star 5ITX1
5I-VX1C
Same as Lucky Star P54CE
Flexus
Flytech
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC-00
Motherboard
A47 Green PC
Fong Kai Industrial
www.fkusa.com
Code
Motherboard
F
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC-00
Motherboard
SL586VT-II
Code
Motherboard
SL 586V
Rev 1.1
Jumper
J7/8
J9-10
Position
J11
J13-14
A-E
J9
On
On
Off
J10
On
Off
On
J13
Off
On
Off
On
A
B
C
D
E
Off
J14
Off
Off
On
On
Function
EPROM Voltage
Host bus speed
50 MHz
60 MHz
66 MHz
CMOS Clear
CPU Clock Multiplier
1.5x
2x
3x
2.5x
3.5v
3.3v
3.2v
2.9v
2.8v
2.5v
SL 586VT-II
Same as Winco SL 586VT-2
Fordlian
See also RedFox
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
AC
AC
Motherboard
6IFXA
FL51HXA
5IVXA
Code
AC
BC
Motherboard
5IVXB
5ITXA rev A
5IVXA
Same as Aprocom Nex586v
Formosa
Freetech
Free Computer Technology www.freetech.com May make boards for AMP
If there is no FAB # underneath, it is not a Freetech motherboard.
257
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0-01
9C
AC
AC
BC-00
CC
Motherboard
486F38X
586F62
P586F62T
586F63T
586F60
P5F76 (Falcon)
Code
CC-00
DC-00
HC
HC-00
NC(-00)
NC-01
Motherboard
586F63T
586F60
586F52
486F55
586F61(-PB)
586F52XS ver D
486F38(X)
X model same as Genoa 486VLGX4
CPU Clock
Speed (MHz)
25
33*
40
50
JP20
On
Off
On
Off
JP19
Off
On
Off
On
JP17
On
On
Off
Off
L2 Cache Size
Size (Kb)
128
256*
256
512
512
JP12
1-2
2-3
1-2, 3-4
2-3, 4-5
1-2,3-4
JP21
Off
Off
Off
On
On
Tag
8K8
16K8
16K8
32K8
32K8
Data
32K8x4
32K8x8
64K8x4
64K8x8
128K8x8
486F39
As for 486F38
486F41
As for 486F38
P5F76
Activei?
Freeway
www.freeway.co.jp
Fugutech
Fugu Tech Enterprise Co. www.fugu.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1C
2C(-00)
4C
Motherboard
M530
M 505/Neptune DP
M507
Code
9C
HC
Motherboard
M701
M 507
F
M507
Aka Concord COA-507, ATC 1000 or Amptron PM 7600
M530
Aka Concord COA-530
Full Yes International
See FYI
FYI
Full Yes Industrial Corp. www.fyi.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
AC
AC
Motherboard
82430VX P55C (SMC)
FYI VIA 597
82430VX P55C (UMC)
82430VX P55C
UMC chipset. Same as BJMT Nimble VX
Code
BC
C-00
Motherboard
82430VX P55C/MMX
FYI 597
259
260
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
G
Gateway
See ALR
Gemlight
www.gemlight.com.hk www.gemlight.com
Makes DTK boards
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0
2
2C
31C
32
Motherboard
GMB 486SG
GMB P54SPS
GMB P54SPS
GMB 486SPS
GMB 486SPS
Code
9C
A
AC-00
JC
KC
GMB-P54PSI
Same as DTK PAM 00541-E1?
GMB-P57SAX
Item
Form Factor
CPU
Speeds
Chipset
Description
ATX
Pentium II
233 MHz
SiS
Notes
Slot 1
50-75 MHz
Genoa
Genoa Systems Corp. www.genoasys.com
Motherboard
GMB P56IPS
GMB P54SPS P54C PCI
GMB P54SPV/P56SPC
GMB P54PSI
GMB P54PSI v1
262
The PC Engineer’s Reference Book – Vol 2: Motherboards
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC
Motherboard
Turbo Express 586HX v T1B
Code
Motherboard
486VLGX4
Same as Freetech 486F38X
Turbo Express PII
Item
Form Factor
CPU
Memory (Mb)
Description
ATX
Pentium II
512 Mb SDRAM
1 Gb EDO
Video
Performance
Comments
Notes
Slot 1
4 DIMM sockets
AGP
Fastish
Poor layout
Turbo Express 586HX v T1B
Actually a Freetech P586F62T - same as Genoa Turbo Express 586HX v T1B
G-host
G486PLB
Jumper
JP1
JP2
JP3
JP5-9
JP10-12
JP14-16
JP100
Position
On
Off
1-2
2-3
1-2
2-3
JP5
Off
On
1-2*
JP14
On
Off
On
On
Off
JP6
Off
On
JP7
Off
Off
JP15
1-2
2-3
1-2
JP16
2-3
Off
1-2
JP8
Off
On
JP9
Off
Off
Function
Colour
Mono
External power good
Internal power good
Discharge CMOS
Charge CMOS
Cache size
64K
256K
W/B dirty bit – leave On
CPU type
486DX
486SX
487SX
Local bus video card is G-HOSTS3/ISA
Local bus video card is G-HOST4000
Giantec
Gigabyte
www.gbt-tech.co.uk www.giga-byte.com www.gigabyte.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
G
Code
02-00
03-00
1
1-00
1C-00
3
9C
9C
9C-00
9C-00
Motherboard
GA 586AP rev2
GA 586AL/S rev 2A
GA 486VF Rev 8B
GA 486 IM or 486VS
GA 586IP v1.6
GA 486AM
GA 686BX/LX or 586DX/TX
GA 586AS
GA 586AVS/S
GA 5486AL
Code
AC
AC
BC(-00)
DC-00
HC
IC
KC
NC
PC
Motherboard
GA 6BA
GA 586ATV
GA 586HX/VX/(ATX)
GA 586TX3
GA 586AT/T2 or 486AM/S
GA 586AT
GA 586ATE/ATM
GA 586-ATEP
GA 586ATM/P Rev 5 or ATE
GA-486AM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Comments
Description
Baby AT
486
Notes
22 x 25 cm
Intel/Cyrix, including P24
UMC 888X
Award Flash
3 PCI/4 ISA
128
1 Mb
2S, 1P, Floppy, EIDE
V4.50pg
4 72-pin sockets
Video card in third PCI slot
GA-486IM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Cache (K)
Problems
Description
Notes
486
Intel/Cyrix
UMC 888X
Award Flash
256
V4.50b
Will not boot OS/2 with an NCR controller made by Intel or Asus and a Cardex Challenger in a PCI slot. An
S3/864 card will allow booting, but serial ports go undetected, or may work poorly
GA-486IS
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Description
Notes
486
25, 33
Saturn I
4 PCI/ 4 ISA
SX, DX, DX2, P24T. 5v only.
Rev 2
4 72-pin SIMMs (parity, non-parity)
256
NCR On-board SCSI
GA-586AL/S
Item
CPU
Speeds (MHz)
Chipset
BIOS
Comments
Description
Pentium
60/66
ALi
Award
Notes
Doesn’t like OS/2
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264
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GA-586AP
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium
75, 90, 100
ALi
Award Green Flash
3 PCI/4 ISA
1 Mb
2 S, 1P, Floppy (2.88)
Notes
Supports NCR 53c810-based GA-410 NCR 810 PCI SCSI card
1 each shared
Up to 6 sockets
Asynchronous, write-back
IDE CMD 640
GA-586AT(E)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Comments
Jumper
A6-7
B6-7
JP2
JP3
JP4,5
JP6
JP6
Description
¾ Baby AT
Pentium/P54CT
75-133
Triton
Green Flash Award
3 PCI/4 ISA
4-128
512
2S, 1P, Floppy, 2 EIDE
Position
A6-A7
B6-B7
Close
Open
1-2
2-3
JP4
2-3
1-2
1-2
None
1-2
1-2,3-4
3-4
3.3v
None shared
Up to 6 72-pin sockets (double/single)
ATE version may not like ATI cards – possible BIOS upgrade to fix.
Chipset IDE drivers may not like Warp.
JP5
2-3
1-2
2-3
Close
Open
Function
Single voltage 3.3v CPU
Dual voltage 2.5v/3.3v CPU
VRE spec CPU
VR or standard spec CPU
256K cache
512K cache
Host bus speed
50 MHz
60 MHz
66 MHz
75-100 MHz (CPU 1.5x)
120/133 MHz (CPU 2x)
150/166 MHz (CPU 3x)
Reserved
Ver 3.x mainboard
120/133 MHz (CPU 2x)
75-100 MHz CPU (CPU 1.5x)
Ver 2.x mainboard
Reserved
JP12
Connectors
Jumper
J4
J5
J6
J7
J8
J9
J10
Notes
Function
Green connector
Green LED
Reset
Turbo Switch
Turbo LED
Speaker
Power LED & Keylock
G
GA-586IP
Item
CPU
Speeds (MHz)
BIOS
Bus
Memory (Mb)
Cache (K)
Problems
Description
P54CT
60/90 or 66/100
Award Flash 4.50g
4 PCI/4 ISA
768
256 or 512 Kb
Notes
All PCI allow busmastering
6 72-pin slots
Add /A:0 /I switches to basedev line of Adaptec 2940 driver. Also, set the Int A jumper on the
board itself. Some problems with ATI cards due to PCI slots 0 and 1 being modified.
Comments
GA-586SGM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Video
Audio
Performance
Description
ATX
Pentium
233
SiS 5591
3 PCI/3 ISA
768
Notes
Socket 7. AMD, Cyrix and Intel
3 DIMM sockets. 3.3 v
AGP
No wavetable
Slow
Yamaha 715E-S
GA-586TX
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Jumper
JP 6
SW 1
Sw 2,3,8
SW 4-7
Description
ATX
Pentium
233
TX
Award
4 PCI/3 ISA
256
512
Position
On
Off
On
Off
2
Off
On
On
Off
Off
On
On
Off
Off
4
Off
Off
Off
Off
3
Off
Off
On
On
Off
Off
On
On
Off
5
Off
Off
Off
On
Notes
Socket 7. AMD, Cyrix and Intel
2 DIMM sockets. 3.3 v
8
Off
Off
Off
Off
Off
On
On
On
On
6
Off
Off
On
Off
7
On
Off
Off
Off
Function
ATX power supply
Normal
60 MHz ext clock
66 MHz
CPU Ratio
1.5
2
2.5
3
3.5
4
4.5
5
5.5
Voltage
Auto
2
2.1
2.2
265
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
Off
On
On
On
On
Off
Off
Off
Off
On
On
On
On
On
Off
Off
On
On
Off
Off
On
On
Off
Off
On
On
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Off
Off
Off
Off
On
On
On
On
On
On
On
On
Function
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3
3.1
3.2
3.3
3.4
3.5
GA-5AX
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium/K6
550
ALi Aladdin V
Award 4.51PG
4 PCI/3 ISA
768 Mb
512
2 EIDE, floppy, USB
Notes
Socket 7
Rev 4 up to 400 MHz
1 each shared
3 DIMM sockets
AGP
Average.
GA-686BLX
Item
Form Factor
CPU
Speeds (MHz)
Bus
Memory (Mb)
Description
Baby AT
Pentium II
366
4 PCI/2 ISA
512 SDRAM
1 Gb EDO
Video
Performance
Comments
Notes
Slot 1
1 each shared
4 DIMM sockets
AGP
Above average
AT/ATX power connectors
DIP Switches
Switch
1-4
Position
1
On
Off
On
Off
On
Off
2
Off
Off
On
On
Off
Off
3
On
On
Off
Off
Off
Off
4
On
On
On
On
On
On
*Manual says opposite 66 MHz = JP2, 3, 4 at 1-2
GA-6BXF
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Description
ATX
Pentium II/Celeron
550
440 LX
Notes
Slot 1
Function
Ratio
3x
3.5
4
4.5
5
5.5
Ext Clk
66 MHz
66 MHz
66 MHz
66 MHz
66 MHz
66 MHz
CPU
200 MHz
266 MHz*
233 MHz*
300 MHz
333 MHz
366 MHz
G
Item
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
Award 4.51PG
4 PCI/3 ISA
1 Gb
Notes
1 each shared
4 DIMM sockets
2 EIDE, floppy, USB
Adaptec AIC-7890 LVD SCSI
AGP
SCSI good, otherwise average
GA-6CX
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium III
Intel 820
Award 4.51PG
5 PCI/1 AMR
RDRAM
The usual
AGP
Notes
Slot 1
Dual BIOS
depends on board
2 RIMM sockets
4x
Look also at Aopen AX6C or SuperMicro PIIISCE
GA-6WMM7
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Comments
Description
ATX
Celeron
Notes
Socket 370
100 FSB
Intel 810
Award
3 PCI/1 ISA
512 Mb
The usual, plus joystick and audio
UDMA/66
2 DIMM sockets
Secret jumper not in docs for 100 FSB
GA-6WXM7
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Audio
Description
ATX
Celeron
Notes
Socket 370
Intel 810
5 PCI/1 ISA
512 Mb
2 EIDE, floppy
Yamaha YMF744BR
UDMA/66
2 DIMM sockets
GA-71X
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Athlon
AMD-750
Award
5 PCI/2 ISA
768 Mb
The usual
Notes
Slot A
UDMA/66
3 DIMM sockets
AGP 2x
267
268
The PC Engineer’s Reference Book – Vol 2: Motherboards
GA-7ZXR
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Description
ATX
Notes
Socket A
Via KT133
5 PCI/1 ISA
3 DIMM sockets
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel,
2 EIDE, floppy
Video
AGP
Global Circuit Technologies
www.gcttech.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
8C
9C
Motherboard
GCT 8IV
GCT 6IV
Code
9C-00
EC-00
Motherboard
MediaGX-GCT
GCT 8ITB
GCT 8ITB
Same as DataExpert ExpertColor TX430II
Global Impact
Award BIOS ID
The last two numbers of the BIOS part number.
Code
GC
Motherboard
C586HX
Code
Motherboard
C586HX
Same as DFI G586IPC or Crusader C586HX
Global Legate
Zaapa. www.zaapa.com
H
Hewlett Packard
www.hp.com
Vectra 286-12
Jumper
S1
S2
S3
S4
S5
Position
Off*
On
Off*
On
Off*
On
Off*
Off*
On
S6
Function
Video IRQ9 disabled
Enabled
VGA Enabled
Disabled
Mouse IRQ12 enabled
Disabled
Power on password enabled
Option ROMs on backplane enabled
Option ROMs on memory board enabled
Reserved
Vectra 386-25
Jumper
S1
S2
S3
S4
S5
Position
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
S6
Function
Power on password enabled
Disabled
Option ROMs Enabled
Disabled
Cache memory enabled
Disabled
I/O channel synchronous 8.3MHz
I/O channel asynchronous 8MHz
Mouse IRQ12 enabled
Disabled
Reserved
Vectra 386/N
Jumper
S1
Position
Off*
Function
Mouse IRQ12 enabled
270
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
S2
S3
S4
S5
S6
Position
On
Off*
On
Off*
Off*
On
Off*
On
Off*
On
Function
Disabled
Video IRQ9 disabled
Enabled
VGA Enabled
Passwords enabled
Disabled
EPROM information valid
EPROM information erased
Security mode disabled
Enabled
Reserved
S7
Vectra 386s-20
As for 386/N, except S8 is reserved.
Vectra ES
Jumper
SW1
C1
SW1
C2
SW2
C1-2
SW3
S1-2
SW3
S3
SW3
S4
SW3
S5
SW3
S6
SW4
S1-5
SW4
S6
Position
On
Off
On
Off
Both On*
S1
On
Off
On
On
Off
On
Off
On
Off
Function
Option ROMs Off
Option ROMs On
80287 uses system clock
80287 system clock divided by 3
Reserved
S2
On
Off
Off
Base memory
640K
512K
256K
I/O channel 8 MHz
I/O channel 12 MHz
Fast boundary at 640K
Fast boundary at 512K
HP-HIL enabled
HP-HIL disabled
Reserved
On
Extended memory up to 000000h
On
Off
16-bit boards using MEMCS16 at 8 MHz
16-bit boards using MEMCS16 at 12 MHz
Vectra ES12
As for Vectra ES
Holco
See Shuttle
HSB
HSB Computer Labs. www.hsb-labs.com
MB/MS4144PC100
Item
CPU
Description
486
Notes
Does not work with a DX4-50/100
H
Item
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
SiS 85C496/85C497
AMI Green
3 PCI/4 ISA
128
1 Mb
2 S, 1 P, Floppy, IDE
Notes
Non-flash
None shared
72-pin SIMMs
256 standard
IDE is Winbond chipset. NCR SCSI controller
Hsing Tech
See PC Chips
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
Motherboard
Cheetah
Code
Motherboard
Hyundai
Super 286x
Jumper
A1-2
B1-2
A3-4
B3-4
A4-5
B4-5
A6-7
B6-7
A7-8
B7-8
SW1
S1-3
SW1
S4
Position
In*
Out
In*
Out
In*
In*
Out
In*
In*
Out
In*
In*
Out
In*
In*
Out
S1
On
Off
On
Off
On
On*
Off
S2
On
On
Off
Off
On
S3
On
On
On
On
Off
S2
On
On
Off
Off
S3
On
On
On
On
Function
Enable floppy
Disable
Enable HD
Disable
Enable LPT1
Enable LPT1
Disable
Enable LPT2
Enable LPT2
Disable
Enable COM1
Enable COM1
Disable
Enable COM2
Enable COM2
Disable
Base
Ext Memory
512K
0K
640K
0K
640K
384K
640K
1408K
640K
3456K
Colour monitor
Mono
Super 286E
Jumper
SW1
S1-3
SW1
Position
S1
On
Off
On
Off
On*
Function
Base
Ext Memory
512K
0K
640K
0K
640K
384K
Reserved
Colour monitor
271
272
Jumper
S4
W1
W2
W3,6
W4,5
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Off
On*
Off
On*
Off
1-2*
2-3
Off
1-2*
2-3
Off
Function
Mono
Enable HD
Disable
Enable FD
Disable
COM1
COM2
Disable
LPT1
LPT2
Disable
Super 286E+
Jumper
SW2
S1
SW2
S2
S3-6
Position
Function
Reserved
Off
On
S3
On
Off
S7
On*
Off
On*
Off
Off*
On
Off*
On
Mono monitor
Colour
Parallel port
LPT1
LPT2
Disabled
Serial port COM2
Disabled
Serial port COM1
Disabled
Enable HD
Disable
Enable FD
Disable
Reserved
Reserved
S8
S9
S10
S4
Off
On
S5
Off
On
S6
On
On
Off
S11
S12
Super 286TR
Jumper
J5
J9
J7
Position
Out*
In
1-2*
2-3
All out
1-2*
2-3
All out
Function
Mono display
Colour
COM1 I/O 3F8
COM2 I/O 2F8
Disable
LPT1 I/O 378
LPT2 I/O 278
Disable
Super 386C
Motherboard
Jumper
J8,9
J10-13
J11-12
Position
J8
1-2*
2-3
J10
1-2
2-3
J11
1-2
2-3
J9
1-2*
2-3
J11
1-2
2-3
J12
1-2
2-3
J12
1-2
2-3
J13
1-2
2-3
Function
Printer
LPT1
LPT2
Serial ports
Port 1=COM2, Port 2=COM1
Port 1=COM1, Port 2=COM2
Serial ports
COM2 at port 1 enabled
COM1 at Port 1 enabled
H
CPU Board
Jumper
JMP1
JMP2
JMP3
Position
1-2
2-3
In
Out
In
Out
Function
Mono display
Colour
Enable pipeline
Disable
Enable 80387
Disable
Super 386D
Jumper
W1
W2,3
W4
W6
W7
W8
W9
SW1
S1-2
S3
S4
Position
In
Out
W2
1-2
2-3
W3
1-2
2-3
1-2
2-3
All out*
In
Out
1-2
2-3
1-2
2-3
Both On
Function
8 MHz DMA clock
4 MHz DMA clock
Cache size
64K (16Kx4)
256K (64Kx4)
Reserved
Low CPU speed
Reserved
High CPU speed
Mono display
Colour display
1Mb RAM chips in Bank 1
256K RAM chips in Bank 1
1Mb RAM chips in Bank 0
256K RAM chips in Bank 0
Total 32-bit RAM installed
Reserved
Enables 2nd bank on motherboard
Super 386N
Jumper
S1
S2
S3
S4
S5
S6
S7
S8
E1,2
Position
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
On*
E1
1-2
2-3
Super 386N+
As for Super 386D
E2
1-2
2-3
Function
80387 installed
Not installed
1 Mb DRAMs
256K DRAMs
2 banks memory (U98-U105)
1 bank memory (U98-U101)
Enable extended memory (384K)
Disable
Colour display
Mono
Enable cache
Reserved
Reserved
EPROM
27256
27512
273
274
The PC Engineer’s Reference Book – Vol 2: Motherboards
Super 386S/20L
Jumper
S1
S2,3
S4
Position
On*
Off
S2
On*
Off
On
Off*
S3
Off*
On
Function
Colour display
Mono
Video
Enable
Disable
Enable 8514
Disable
Super 386SE
Jumper
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
Position
On
Off*
On
Off*
On*
Off
On
Off
On
Off
On
Off*
On*
Off
On*
Off
On*
Off
On
Off*
Off*
Function
Half speed I/O cycle (8 MHz)
Full speed (16 MHz)
Coprocessor installed
Not installed
Colour display
Mono
IRQ7
Not selected
IRQ5
Not selected
Enable parallel port LPT2
Select parallel port LPT1
Enable parallel port LPT1
Disable
Enable serial port COM2 (2F8h)
Disable
Enable COM1
Disable
Disable IDE
Enable
Enable floppy
Reserved
Super 386ST
Jumper
S1
S2
S3
S4
S5
S6
S7
S8
Position
On
Off*
On
Off*
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
On*
Off
Function
IRQ5 enabled
Disabled
IRQ7 enabled
Disabled
HD enabled
Disabled
Enable COM1
Disable
Enable LPT1
Disable
Floppy enabled
Disabled
Enable COM2
Disable
CRTC colour mode
CRTC Mono
H
Super 386STC
Jumper
S1
S2
S3
S4
S5
S6
S7
S8
S12
Position
On*
Off
On*
Off
On*
Off
On
Off*
On
Off*
On
Off*
On*
Off
On
Off*
On*
Off
Function
Enable COM2
Disable
Colour video tape
Mono
Enable parallel port
Disable
Enable HD
Disable
Disable floppy
Enable
Enable LPT2
Enable LPT1
Enable COM1
Disable
IRQ5 for LPT2
Not selected
IRQ7 for LPT1
Not selected
Super 386T
Jumper
SW1-2
S-4
W8,9
SW2
S1
S2
S3
S4
SW3
S1
S2
S3
S4
W1
W2-3
Position
S4
On
Off
Off
On
Off
On
Off
On
Off
On
On
On
On
On
On
W2
1-2
2-3
W8
Front
Rear
W3
1-2
2-3
W4
W9
Front
Rear
Function
Reserved
SIMMs
1Mb
256K
Enable COM1
Disable
Enable COM2
Disable
Enable LPT
Disable
LPT1
LPT2
IRQ4 for COM1
IRQ3 for COM2
IRQ5 for LPT
IRQ7 for LPT
Fast DMA clock
Cache size
64K
256K
Reserved
Super 486/33i
Jumper
W1
W2,3
W4
W5
W6
Position
Out*
W2
1-2*
2-3
1-2*
2-3*
1-2
W3
1-2*
2-3
Function
Reserved
Cache size
64K (16Kx4)
256K (64Kx4)
Reserved
Reserved
Low CPU speed (not used)
275
276
Jumper
W7
W8
W9
S1
S2
S3
S4
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
2-3
Out
In
Out
1-2*
1-2*
Function
Reserved
High speed (not used)
Mono display
Colour
Reserved
Reserved
Enable 2nd bank on motherboard
SIMM type
Total 32-bit RAM
Total 32-bit RAM
I
IBM
IntelliStation
6588
Jumper
A,B
Position
A
3-5
1-3
1-3
2-4
4-6
2-4
4-6
3-5
2-4
4-6
1-3
3-5
5-6*
4-5
A
C
D
D
Boot Block
B
3-5,4-6
1-3,2-4
2-4,3-5
Function
CPU Speed
233 MHz
266 MHz
300 MHz
FDD read-Only
FDD read/write
Clear CMOS
Normal CMOS
Reserved
Setup disabled
Setup normal enabled
Reset password
Normal password
Normal
Recover
6888
As for 6588
6899
Switch
1-6
7
8
J8
Position
CPU speed
200 MHz
On*
Off*
On
1-2*
2-3
Function
1
2
On
Off
Enable serial B
Normal diskette operation
Diskette Read-only
Password enabled
Disabled (Clear CMOS)
3
On
4
On
5
Off
6
N/A
278
The PC Engineer’s Reference Book – Vol 2: Motherboards
Opal
Alaris Leopard LX 486SLC2 Rev C
Jumper
JP6
Position
1-2
2-3
Function
128K cache
64K cache
PC 300
6272
Switch
1-4
5
6
J6
Position
1
Off
Off
Off
On
On
On
On
Off*
Off*
On
1-2*
2-3
2
Off
Off
Off
Off
Off
On
On
3
On
On
Off
On
Off
On
Off
4
On
Off
On
Off
On
Off
On
2
On
On
Off
3
On
On
On
4
Off
Off
Off
Function
CPU speed
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
Reserved
Enable diskette write
Write protected
Password enabled
Disabled (Clear CMOS)
6282
As for 6272
6562
Switch
1-4
Position
1
On
Off
Off
5
6
7
8
Off*
Off*
Off*
Off*
On
1-2*
2-3
J15
Function
CPU speed
166 MHz
200 MHz
233 MHz
1&2 = bus/processor core ratio
3&4 = local bus frequency
Reserved
Enable Ethernet
Privilege Access Password (PAP) disable
Enable diskette write
Write protected
Normal
CMOS reset
6592
Switch
1,2
3,4
5
6
7
Position
1 (BF0)
On
On
Off
Off
3 CLK0
On
Off
On
Off
Off*
Off*
Off*
2 (BF1)
On
Off
On
Off
4 CLK1
On
On
Off
Off
Function
Bus/CPU core ratio
2/5
½
1/3
2/3 (2/7 P55C)
Host bus speed
50 MHz
60 MHz
66 MHz
Test Mode
Reserved
Enable Ethernet
Privilege Access Password (PAP) disable
I
Switch
8
J15
Position
Off*
On
1-2*
2-3
Function
Enable diskette write
Write protected
Normal
CMOS reset
PC 330/350
6577
Switch
1-4
6
J15
Position
1
Off
Off
Off
On
On
On
On
Off
Off*
On
1-2
2-3*
2
Off
Off
Off
Off
Off
On
On
On
3
On
On
Off
On
Off
On
Off
Off
4
On
Off
On
Off
On
Off
On
On
Function
CPU speed
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz
Normal diskette operation
Diskette Read-Only
Password disabled (Clear CMOS)
Enabled
6587
As for 6577
PC 340
6560
Switch
JP3
JP4
JP9
JP11
JP13
JP14,17
JP19
JP21
JP22
JP23
Position
Short*
Short*
1-2*
2-3
1-2*
2-3
1-2*
2-3
JP14
1-2
3-4
1-2,3-4
3-4
1-2,3-4
1-2,3-4
1-2
2-3*
1-2*
2-3
1-2*
2-3
1-2*
2-3
JP17
Open
Open
Open
1-2
1-2
1-2,3-4
Function
Enable Onboard VGA
Enable PS/2 mouse
Normal CMOS
Clear CMOS
Enable Flash
Flash lock
256K cache
512K cache
CPU speed
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
166 MHz
STD 3.3v
VRE 3.52v
FDD normal
FDD write protect
Non-linear burst, async cache
Linear burst sync cache
HDD detect
Don't detect
279
280
The PC Engineer’s Reference Book – Vol 2: Motherboards
PC 330/350
65X5
Jumper
MRD
WP
PWD
Position
1-2
2-3*
1-2
2-3*
1-2*
2-3
Function
Modem no answer on ring
Modem answer on ring
Disable writing to diskette
Enable
Password enabled
Password reset
65X6
Pentium based
Switch
SW1
1-2
SW1
3-5
SW1
6-8
J4A2
J4J1-2
J4K1
J4K2
J5J1
J9C1
Position
1
On
Off
Off
3
Off*
On*
Off
Off
6
Off
Off
Off
Off
1-2*
2-3
4-5
J4J1
2-3,4-5
2-3,5-6
1-2,4-5
2-3,5-6
1-2,4-5
2-3,5-6
1-2,4-6
1-2*
2-3
4-5*
5-6
1-2*
2-3
4-5*
5-6
1-3
1-2
5-7 In
5-7 Out
4,6,8
1-3*
5-7
2
N/A
Off
On
4
Off
Off
Off*
Off
7
Off
On
Off
N/A
J4J2
2-3,4-5
2-3,4-5
2-3,4-5
2-3,5-6
2-3,5-6
1-2,5-6
1-2,5-6
5
Off
Off
Off
Off
8
Off
Off
On
N/A
Function
L2 cache size
0
256K
512K
CMOS setup
Password enabled
Password reset
Normal CMOS
Reset CMOS
Host bus/CPU speed
50/75 MHz
60/90 MHz
66/100 MHz
Reserved
Normal BIOS
Flash enabled
Reserved
CPU speed
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
ISA ¼ PCI
ISA 1/3 PCI
CMOS setup access enabled
CMOS setup access disabled
Normal CMOS
Reset CMOS
Normal password
Reset password
Normal BIOS flash reset
Reset
ISA 1/8 clock speed
ISA 1/6 clock speed
Reserved
STD voltage CPU
VRE voltage CPU
657X
Switch
JP3,4
Position
JP3
1-2
2-3
JP4
1-2
2-3
Function
Local Bus
VESA
PCI
I
Switch
JP8,9
Position
JP8
1-2
2-3
None*
3-4
1-2
1-2*
2-3
1-2*
2-3
1-2*
2-3
JP16
1-2*
2-3
J23
1-2
2-3
2-3
JP35
On
Off
Off
Off
Off
JP10
J13
JP14
JP15
JP16,17
J23-24
JP35-37
JP9
1-2
2-3
JP17
Close*
Open
J24
Open
Open
Closed
JP36
Off
On
On
Off
Off
JP37
Off
On
Off
On
Off
Function
ECP DMA
DRQ3*
DRQ1
3x clock speed
2x clock speed
Other
Program flash disable
Enable
Normal CMOS
Clear CMOS
Enable Onboard VGA
Disable
Cache size
256K
128K
CPU
486SX*
486DX
P24T
CPU speed
20 MHz
25 MHz*
33 MHz
40 MHz
50 MHz
658X
As for 657X
PC 360-S150
6598
Switch
1-2,4-5,7-8,11-12
2-3,5-6,7-8,10-11
13-14
14-15*
16-17
17-18*
19-20
20-21*
22-23
23-24*
26-27
Function
150 MHz CPU, 60 MHz bus, 30 MHz PCI, 7.51 MHz ISA
150 MHz CPU, 60 MHz bus, 30 MHz PCI, 7.51 MHz ISA
Password reset
Password enabled
CMOS reset
CMOS Normal
Setup disabled
Setup enabled
Flash recovery enabled
Normal
Reserved
PC730/750
6875
Switch
J19
J21-24
J26-27
Position
Open*
Short
J21
Off
J2t
2-3
2-3
J22
Off
J27
2-3
1-2
J23
On
J24
On
Function
2/3 bus core ratio
½ bus core ratio
Cache size
256K
Bus/CPU speed
50/75
60/90 (120)
281
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
J28
J29
WP
J40
PWD
Position
1-2
1-2*
2-3
1-2
2-3*
1-2*
2-3
Function
66/100 (133)
Mouse enabled
Disabled
Diskette read-Only
Normal diskette operation
Password enabled
Password reset (Clear CMOS)
1-2
6876
As for 6875
6877
Switch
1-4
5
6
J15
Position
1
Off
Off
Off
On
On
On
On
On*
Off
Off*
On
1-2*
2-3
2
Off
Off
Off
Off
Off
On
On
3
On
On
Off
On
Off
On
Off
4
On
Off
On
Off
On
Off
On
Function
CPU speed
75 MHz
90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
Enable Administrator password
Disable
Normal diskette operation
Diskette read-Only
Password enabled
Disabled (Clear CMOS)
6885
As for 6875
6886
As for 6875
6887
As for 6877
PC/XT
The PC has two sets of switches and 5 expansion slots; the XT 1 set of switches and 8 slots.
Switch Bank 1
Switch
1
Position
Off
On
2
3,4
5,6
Off
3
On
Off
On
Off
5
Off
Off
On
On
4
On
On
Off
Off
6
Off
On
Off
On
Function
PC – boot from floppy
XT – normal POST
PC – boot into basic (e.g. not floppy)
XT – loop POST
Coprocessor installed
Memory banks used on XT (PC memory)
0 only (16K)
0 and 1 (32K)
0, 1 and 2 (48K)
All 4 (64K)
Video adapter
Mono or more than 1
CGA 40 x 25
CGA 80 x 25
With own BIOS
I
Switch
7,8
Position
7
On
Off
On
Off
8
On
On
Off
Off
Function
Floppies
1
2
3
4
Switch Bank 2
PC only
Memory
16
32
48
64
96
128
160
192
224
256
288
320
352
384
416
448
480
512
544
576
608
640
1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
Position
Front
Rear
Front
Rear
Function
Colour
Mono
512K
256K
3
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
AT
Jumper
Display
J18
PS/1
486SX - 20/25
Jumper
JP1
JP3
JP7
JP8
JP9
JP10
JP14
JP15
JP16
Position
In
Out
In
Out
In
Out
1-2
2-3
In
Out
1-2
2-3
In
Function
Enable Video MEMCS16
Disable
Normal CLK/2
Turbo
Reset
Run
Internal Battery
External
Colour
Mono
Disable onboard VGA
Enable
Reserved
Reserved
Parity Check enable
4
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
283
284
Jumper
JP17
JP23
JP24
JP26
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Out
In
Out
In
Out
In
Out
In
Out
Function
Disable
Enable Video INT9
Disable
486SX
486DX
Enable PS/2 interrupt (12)
Disable
1-2 Beeper
Speaker
486SX - 20/25
Jumper
JP3
JP4
JP7
JP8
JP9
JP10
JP16
JP17
JP20
JP200
JP 201
JP206
JP207
JP208
JP209
JP304
JP305
Position
In
Out
In
Out
In
Out
1-2
2-3
In
Out
1-2
2-3
In
Out
In
Out
In
Out
1-2
2-3
1-2
2-3
In
Out
1-2
2-3
In
Out
In
Out
1-2
2-3
In
Out
Function
Normal CLK/2
Turbo
27512 EPROM
27256 EPROM
Reset
Run
Internal Battery
External
Colour
Mono
Disable onboard VGA
Enable
Parity Check enable
Disable
Enable VideoMEMCS16
Disable
1-2 Beeper
Speaker
Direct cache
2-way mapping
Direct cache
2-way mapping
128K cache
>128K
Reserved
Reserved
486SX
486DX
Enable PS/2 Mouse Interrupt (12)
Disable
Disable video BIOS
Enable
Enable Video INT9 (may be shorted)
Disable
Value Point
386SLC
Jumper
J8
J12
J13
J16
J17
Position
1-2
3-4
Function
Password bypass
Beeper bypass
Power on LED
HD LED
IRQ9
VGA enable
I
486SX-25
Jumper
JP8
JP10
JP11
JP17
JP23
JP24
J26
Position
1-2
1-2
1-2
4-5
Open*
Close
In
1-2
Function
Battery select
VGA disable
Power on LED
HD LED
VGA enable
SX CPU
DX CPU
Enable mouse
Beeper enable
486DX-33
Jumper
JP4
JP8
JP10
JP17
JP11
Position
To rear
To front
Open
1-2
4-5
Open*
Close
JP23
JP200,1,6
JP209
J20
In*
Left
Function
BIOS select (DX/DX2)
Battery select
VGA enable
VGA enable
Power on LED
HD LED
SX CPU
DX CPU
Cache configuration
Enable mouse
Beeper enable
ICP
Impression Products
www.impression-brand.com
Informtech
Award BIOS ID
The last two numbers of the BIOS part number.
Code
CC-00
Motherboard
533T-AT
Code
Motherboard
533T-AT
Same as Kamei something or Mentor BN 533T
Intel
www.intel.com
Advanced/AL
Item
CPU
Speeds (MHz)
Description
Pentium
75-133
Notes
285
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
Triton
AMI
3 PCI/4 ISA
128
256
Floppy, IDE, serial, parallel, game, PS/2 mouse and
keyboard.
ATI Mach64
Comments
Notes
NCR 53c810 SCSI not supported
1 each shared. Use triton.exe
FPM/EDO
Pipeline burst
Up to 2 MB of DRAM. For OS/2, install for VGA then latest
Mach64 drivers.
Used by Gateway.
Advanced/MN
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Description
Pentium
75-133
Triton
AMI
3 PCI/4 ISA
128 Mb conventional/EDO
256 Kb asynchronous
Floppy, IDE, serial, parallel, game
S3/Trio32
Notes
NCR 53c810 SCSI not supported
1 each shared. Use triton.exe.
Up to 2 MB of DRAM
Advanced MN/LPX
Low profile version of Advanced MN.
Advanced/ZP
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Description
Pentium
75-133
Triton
AMI
3 PCI/4 ISA
Memory (Mb)
Cache (K)
I/O
Video
Performance
128
256 Kb asynchronous
Floppy, IDE, serial, parallel, game
S3 Trio64
Notes
NCR 53c810 SCSI not supported
1 each shared. PCI Bus mastering. Use triton.exe. Large capacitor next to CPU
prevents full-length PCI in adjacent slot.
FPM/EDO
Asynchronous
European model
Turn off PCI bursting for slow video cards.
Advanced/ZE
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Description
Pentium
75-133
Triton
AMI
4 PCI/5 ISA
Memory (Mb)
Cache (K)
I/O
Video
Performance
128
256
Floppy, IDE, serial, parallel, game
S3 Trio64
Notes
NCR 53c810 SCSI not supported
1 each shared. PCI Bus mastering. Use triton.exe. Large capacitor next to CPU
prevents full-length PCI in adjacent slot.
FPM/EDO
Asynchronous
European model
Turn off PCI bursting for slow video cards.
I
Advanced/EV
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Description
Pentium
75- 166
Triton
AMI
3 PCI/4 ISA
Notes
Memory (Mb)
Cache (K)
I/O
Video
Audio
Performance
128
512
Floppy, IDE, serial, parallel, game
S3 Trio64
SoundBlaster 16
NCR 53c810 SCSI not supported
1 each shared. PCI Bus mastering. Use triton.exe. Large capacitor next to CPU
prevents full-length PCI in adjacent slot.
FPM/EDO
Synchronous
European model
Turn off PCI bursting for slow video cards. To overclock 120 -33, set:
CPU
Sw 2
Sw 6
75
OFF
OFF
90
OFF
OFF
100
OFF
OFF
120
On
On
133
On
On
Does not like Adaptec 2940UW
Comments
AL440LX
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Performance
Jumper
J8B2
Description
ATX
Pentium II
440LX
Notes
4 PCI/2 ISA
384
2S, 1P, USB, IR, PS/2, EIDE, floppy
1 each shared
SDRAM. 3 DIMM sockets
Slot 1
AGP
Sometimes
Average
Yamaha OPL3-SAX
Position
Normal
2-3
None
Front Panel header
1-2
3-4
6-11
13-16
18-20
22-23
24-27
Config
Recovery
Function
BIOS uses current configuration and passwords for booting
After POST, setup runs automatically (use to change setup)
BIOS attempts to recover BIOS configuration (needs diskette)
Power On
Sleep
IR
HDD LED
Power LED
Reset
Speaker
AltServer
Item
CPU
Speeds (MHz)
Chipset
Description
2 Pentium
75-90
Neptune
Notes
Sw 7
On
OFF
On
OFF
On
Sw 8
OFF
OFF
On
OFF
On
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Item
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Comments
Description
AMI Flash
3 PCI/4 ISA
256
256
Cirrus Logic 5430
Notes
NCR 53c810 SCSI not supported
1 each shared. Bus mastering
8 72-pin sockets
Asynchronous
AIC7870 fast/wide SCSI controller.
512 Kb- 1 Mb RAM
Only increases by 30% with 2nd 90 MHz CPU and SMP OS.
Primarily for servers
B1440ZX
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
ATX
Notes
Socket 370
440 ZX
AMI
2 PCI
256 Mb
66 MHz
2 EIDE, floppy, USB
AGP
B486ED (D)
Item
CPU
Speeds (MHz)
Bus
Memory (Mb)
Cache (K)
I/O
Description
486
33-100
PCI
64
256
2S, 1P, IDE
Notes
DX4, P24T. CPU gives board’s model number; e.g. with DX2 it would be B486ED8D266.
72-pin SIMMs (parity/non-parity)
128 standard
CA 810
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Description
Micro-ATX
Celeron
Intel 810
4 PCI
512 Mb
2 EIDE, floppy
Notes
Socket 370
UDMA/66
2 DIMM sockets
D815EEAAL
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium III/Celeron
1000/700
Intel 815E
Award
5 PCI
512
2 EIDE, floppy, USB, IR, Intel 82562 LAN
Intel 815 GMCH
Notes
Socket 370
FSB 133
UDMA/100
3 DIMM sockets
AGP
E186194
Item
Form Factor
CPU
Chipset
Description
ATX
Pentium II/Xeon
Intel 440GX
Notes
SMP Slot 2
I
Item
Bus
Memory (Mb)
I/O
Video
Description
6 PCI/1 ISA
2 Gb
2 EIDE, floppy, USB, IR, Intel 82558 LAN
Notes
UDMA/33
4 DIMM sockets
AGP 2x
KN-6000
CPU Speed
Clock Ratio
FREQ1
FREQ2
FREQ3
233 MHz
3.5x
Off
Off
On
266 MHz
4x
On
On
Off
300 MHz
4.5x
Off
On
Off
333 MHz
5x
On
Off
Off
Leave jumpers for clock multiplier set to defaults CLK1: 1-2, CLK2: 2-3.
FREQ4
On
On
On
On
KN-6010
As for KN-6000
PA-2005
Intel
CPU
200 MHz
166 MHz
150 MHz
133 MHz
120 MHz
100 MHz
90 MHz
75 MHz
Host
66
66
60
66
60
66
60
50
CLK1
1-2
1-2
2-3
1-2
2-3
1-2
2-3
2-3
CLK2
2-3
2-3
1-2
2-3
1-2
2-3
1-2
2-3
CLK3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
Ratio
3x
2.5x
2.5x
2x
2x
1.5x
1.5x
1.5x
FREQ1
1-2
2-3
2-3
2-3
2-3
1-2
1-2
1-2
FREQ2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
1-2
AMD
CPU
K6-200
K6-166
K5-PR200
K5-PR166
K5-PR150
K5-PR133
K5-PR120
K5-PR100
K5-PR90
K5-PR75
Host
66
66
60
66
60
66
60
66
60
50
CLK1
1-2
1-2
1-2
1-2
2-3
2-3
1-2
2-3
1-2
2-3
CLK2
2-3
2-3
2-3
2-3
1-2
1-2
2-3
1-2
2-3
2-3
CLK3
1-2
1-2
1-2
1-2
2-3
1-2
1-2
1-2
1-2
1-2
Ratio
3x
2.5x
2x
1.75x
1.75x
1.5x
1.5x
1.5x
1.5x
1.5x
FREQ1
1-2
2-3
1-2
2-3
2-3
1-2
1-2
1-2
1-2
1-2
FREQ2
2-3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2
1-2
Cyrix
CPU
200MX
166MX
P200+
P166+
P150+
P133+
P120+
Host
66
60
75
66
60
55
60
CLK1
2-3
1-2
1-2
2-3
1-2
1-2
2-3
CLK2
1-2
2-3
1-2
1-2
2-3
1-2
2-3
CLK3
1-2
1-2
2-3
1-2
1-2
1-2
1-2
Ratio
2.5x
2.5x
2x
2x
2x
2x
2x
FREQ1
2-3
2-3
2-3
2-3
2-3
2-3
2-3
FREQ2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
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CPU Voltage
P54C VRE (3.384)
P54C STD,VR(3.4-3.6)
P55C (2.8V/3.3V)
2.5V/3.3V
2.7-2.9V/3.3V
2.9V/3.3V
VR1
1-2
3-4
5-6
5-6
5-6
7-8
VR2
1-2,3-4
1-2,3-4
5-6,7-8
5-6,7-8
5-6,7-8
5-6,7-8
Description
ATX
Pentium Pro
450KX (Mars)
Intel Flash
4 PCI/3 ISA
128
2S, 1P, IR
Notes
Performance
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
2 each shared
Parity, non-parity or ECC FPM RAM (60 ns)
PIO-3
Intel
486SX
486DX/DX2/P24S
DX4ODP/P24D
P24T
DX4
JC1
2-3
1-2
1-2
1-2
1-2
JC2
1-2
1-2
1-2
1-2
1-2
JC3
Off
Off
Off
Off
Off
JC4
Off
2-3
2-3
1-2
1-2
JC5
Off
Off
Off
On
Off
RNA
Off
Off
Off
Off
Off
RNC
Off
Off
Off
Off
Off
RNI
Pin1
Pin1
Pin1
Pin1
Pin1
AMD
486DX2 (V)
Enh DX2 (SV)
DX4 (V)
Enh486DX4(NV,SV)
X5
JC1
1-2
1-2
1-2
1-2
1-2
JC2
1-2
1-2
1-2
1-2
1-2
JC3
On
Off
Off
Off
Off
JC4
Off
2-3
Off
1-2
2-3
JC5
Off
Off
Off
Off
Off
RNA
On
Off
On
Off
Off
RNC
Off
Off
Off
Off
Off
RNI
Off
Pin1
Off
Pin1
Pin1
Other CPUs
UMC U5SD
UMC U5S, U5SLV
Cyrix DX, DX2
TI DX2, DX4
Cyrix DX4, 5x86
Function
JPW1,2
JK1-4
JCP
Video
JC1
1-2
2-3
1-2
1-2
1-2
Pins
JPW1
JPW2
1-2
Off
2-3
Off
Off
1-2
Off
2.3
Doesn't matter
JK1
JK2
1-2
1-2
2-3
1-2
1-2
2-3
1-2
1-2
On
Off
On
JC2
1-2
2-3
1-2
1-2
1-2
JC3
Off
Off
Off
Off
Off
JK3
2-3
2-3
1-2
1-2
JC4
Off
Off
Off
Off
1-2
JK4
2-3
1-2
2-3
1-2
JC5
Off
Off
Off
Off
Off
RNA
On
On
Off
Off
Off
Description
CPU voltage
3.3v
3.45v
3.6v
4v
5v
CPU clock
50 MHz
40 MHz
33 MHz
25 MHz
Clear password
CGA
Others
RNC
Off
Off
On
On
Off
RNI
Off
Off
Off
Off
Last pin
I
Function
JW1,2
JW3,4
J1
J3
J11
JT1,JCK
Pins
1-2
2-3
1-2
2-3
1-2
2-3
On
Off
On
Off
1-2
2-3
291
Description
COM2 standard
Infra Red
ECP DMA1
ECP DMA 3
Intel 28F001BX-T EPROM (12v)
SST 29EE101 (5v)
TB LED Green mode
TB LED Turbo mode
LPT output only
Bidirectional
50MHz or 40MHz clock
25MHz or 33MHz clock
Plato
Function
J1H3
J1H4
Pins
1-2
2-3
1-2
Description
50 MHz host bus clock
60 MHz host bus clock
66 MHz (undocumented)
In front of 2nd PS/2 slot (from the right).
Premiere
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Problems
Description
Pentium
60/66
Mercury
AMI Flash
3 PCI/5 ISA
128
256
2S, 1P, IDE
Notes
1 each shared
4 72-pin sockets
CMD for IDE. NCR SCSI built in.
Problems with SCSI? With ATI card and internal modem, turn off intelligent remapping of COM ports to avoid
conflicts with ATI card and COM 4.
For NCR SCSI controller, set IRQ9 to “used by ISA card” during install.
If running SCSI as boot drive, turn off drive C: timeout for faster boot.
Premiere II
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium
75/90/100
Neptune
AMI Flash
3 PCI/5 ISA
128
256
2S, 1P, IDE
Performance
Problems
Notes
1 each shared
4 72-pin sockets
RZ1000 for IDE. NCR SCSI built in. The SMC chip controlling serial ports should have the letters "GT" after it for
trouble-free communications.
To overclock to 100 MHz, move "reserved" jumper (J13) to pins 1 & 2 (75 MHz side) from 2 & 3 (75/90 side).
Need v1.00.10.AX1 of BIOS to fix problems with Access Timing (GAT) and BackMaster 1.1.
With ATI card and internal modem, turn off intelligent remapping of COM ports to avoid conflicts with ATI card and
COM 4. For NCR SCSI controller, set IRQ9 to 'used by ISA card' during install. If running a SCSI as boot drive,
turn off drive C: timeout for faster boot.
PN-6010
Function
CLK1,2
Pins
CLK1
CLK2
Description
External clock
292
The PC Engineer’s Reference Book – Vol 2: Motherboards
Function
JK1-4
VR1
Pins
1-2
2-3
FREQ1
Close
Open
Close
Open
All open
1-2,3-4
Off
Off
FREQ2
Close
Open
Open
Close
Description
66 MHz
60 MHz
Clock Ratio
4x
3.5x
3x
2.5x
ATX power supply
Standard power supply
FREQ3
Open
Close
Close
Close
PN-6210
Function
CLK1,2
JK1-4
Pins
CLK1
1-2
2-3
2-3
FREQ1
On
Off
On
Off
On
CLK2
2-3
1-2
2-3
FREQ2
On
Off
Off
On
On
FREQ3
Off
On
On
On
On
Description
External clock
66 MHz
60 MHz
50 MHz
Clock Ratio
4x
3.5x
3x
2.5x
2x
FREQ4
On
On
On
On
On
PT-2006
Intel
CPU
Host
CLK1
233 MHz*
66
2-3
200 MHz
66
2-3
166 MHz
66
1-2
150 MHz
60
1-2
133 MHz
66
2-3
120 MHz
60
1-2
100 MHz
66
2-3
90 MHz
60
1-2
75 MHz
50
2-3
* use P55C voltage (for MMX)
CLK2
1-2
1-2
2-3
2-3
1-2
2-3
1-2
2-3
2-3
Ratio
1.5x
3x
2.5x
2.5x
2x
2x
1.5x
1.5x
1.5x
FREQ1
1-2
1-2
2-3
2-3
2-3
2-3
1-2
1-2
1-2
FREQ2
1-2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
1-2
CLK2
1-2
1-2
2-3
1-2
2-3
1-2
Ratio
2.5x
2x
2x
1.5x
1.5x
1.5x
FREQ1
2-3
2-3
2-3
1-2
1-2
1-2
FREQ2
2-3
1-2
1-2
1-2
1-2
1-2
AMD
CPU
K5-PR166
K5-PR133
K5-PR120
K5-PR100
K5-PR90
K5-PR75
Host
66
66
60
66
60
50
CLK1
2-3
2-3
1-2
2-3
1-2
1-2
Cyrix
CPU
M2 200
M2 180
M2 166
P166+
P150+
P133+
P120+
Host
66
60
66
66
60
55
50
CLK1
2-3
1-2
2-3
2-3
1-2
1-2
2-3
CLK2
1-2
2-3
1-2
1-2
2-3
1-2
2-3
Ratio
3x
3x
2.5x
2x
2x
2x
2x
FREQ1
1-2
1-2
2-3
2-3
2-3
2-3
2-3
FREQ2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
I
CPU Voltage <10/96
P54C STD, VR (3.384V)
P54C VRE (3.49V)
P55C (2.8V/3.3V)
VR1
1-2
3-4
7-8
VR2
5-6,7-8
5-6,7-8
1-2,2-3
CPU Voltage >10/96
P54C STD, VR (3.4-3.6)
P54C VRE (3.3)
P55C (2.8V/3.3V)
2.5V/3.3V
2.9V/3.3V
VR1
1-2
3-4
7-8
9-10
5-6
VR2
5-6,7-8
5-6,7-8
1-2,3-4
1-2,3-4
1-2,3-4
Function
CPS
SRAM1
R146
Pins
Open
Close
SRAM1
1-2
1-2
2-3
2-3
2-3
R146
On
On
On
Open
Open
Description
Normal
Clear password
Onboard cache
256K
0
256K
512K
0
Module (>COAST 3)
0
256K
256K
0
512K
PT-2011
Intel
CPU
233 MHz
200 MHz
166 MHz
150 MHz
133 MHz
120 MHz
100 MHz
90 MHz
75 MHz
Host
66
66
66
60
66
60
66
60
50
CLK1
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
Not supported
CLK2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
CLK3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
Ratio
1.5x
3x
2.5x
2.5x
2x
2x
1.5x
1.5x
FREQ1
1-2
1-2
2-3
2-3
2-3
2-3
1-2
1-2
FREQ2
1-2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
FREQ3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
AMD
CPU
K6-233
K6-200
K6-166
K5-PR200
K5-PR166
K5-PR150
K5-PR133
K5-PR120
K5-PR100
K5-PR90
K5-PR75
Host
66
66
66
66
66
60
66
60
66
60
50
CLK1
1-2
1-2
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
Not supported
CLK2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
CLK3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
2-3
Ratio
3.5x
3x
2.5x
2x
1.75x
1.75x
1.5x
1.5x
1.5x
1.5x
FREQ1
1-2
1-2
2-3
1-2
2-3
2-3
1-2
1-2
1-2
1-2
FREQ2
1-2
2-3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2
FREQ3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
Cyrix
CPU
M2 200
M2 180
M2 166
M2 150
P200+
Host
66
60
66
60
CLK1
1-2
2-3
1-2
2-3
Not supported
CLK2
1-2
1-2
1-2
1-2
CLK3
2-3
2-3
2-3
2-3
Ratio
3x
3x
2.5x
2.5x
FREQ1
1-2
1-2
2-3
2-3
FREQ2
1-2
2-3
2-3
2-3
FREQ3
1-2
2-3
2-3
2-3
293
294
The PC Engineer’s Reference Book – Vol 2: Motherboards
CPU
P166+
P150+
P133+
P120+
Host
66
60
55
50
CLK1
1-2
2-3
2-3
Not supported
CPU Voltage >10/96
P54C STD, VR (3.384V)
P54C VRE (3.49V)
P55C (2.8V/3.3V)
K5 "B" (3.5V)
K6-233 (3.2/3.3V)
K6-166/200 (2.9V/3.3V)
Cyrix 3.52V (028)
Cyrix 6x86L (2.8V/3.3V)
CLK2
1-2
1-2
2-3
VR1
1-2
3-4
9-10
1-2
5-6
7-8
1-2
9-10
CLK3
2-3
2-3
2-3
Ratio
2x
2x
2x
FREQ1
2-3
2-3
2-3
VR2
1-2,3-4
1-2,3-4
5-6,7-8
1-2,3-4
5-6,7-8
5-6,7-8
1-2,3-4
5-6,7-8
PT-2200
Intel
CPU
233 MHz
200 MHz
166 MHz
150 MHz
133 MHz
120 MHz
100 MHz
90 MHz
75 MHz
Host
66
66
66
60
66
60
66
60
50
CLK1
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
2-3
CLK2
2-3
2-3
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Ratio
1.5x
3x
2.5x
2.5x
2x
2x
1.5x
1.5x
1.5x
FREQ1
1-2
2-3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
FREQ2
1-2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
1-2
AMD
CPU
P166
P150
P133
P120
P100
P90
P75
Host
66
50
66
60
66
60
50
CLK1
1-2
2-3
1-2
2-3
1-2
2-3
2-3
CLK2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Ratio
2x
2x
1.5x
1.5x
1.5x
1.5x
1.5x
FREQ1
2-3
2-3
1-2
1-2
1-2
1-2
1-2
FREQ2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
Cyrix
CPU
M2 200
M2 180
M2 166
P166+
P150+
P133+
P120+
Host
66
60
66
66
60
55
50
CLK1
1-2
2-3
1-2
1-2
2-3
1-2
2-3
CLK2
2-3
1-2
2-3
2-3
1-2
1-2
2-3
Ratio
3x
3x
2.5x
2x
2x
2x
2x
CPU Voltage > 10/96
P54C STD, VR (3.4-3.6)
P54C VRE (3.3)
P55C (2.8V/3.3V)
2.5V/3.3V
VR1
1-2
3-4
5-6
7-8
VR2
1-2,2-3
1-2,3-4
5-6,7-8
5-6,7-8
CPU Voltage < 10/96
P54C STD, VR (3.384V)
VR1
1-2
VR2
1-2
FREQ1
1-2
1-2
2-3
2-3
2-3
2-3
2-3
FREQ2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
FREQ2
1-2
1-2
1-2
FREQ3
1-2
1-2
1-2
I
CPU Voltage < 10/96
P54C VRE (3.49V)
P55C (2.5V/3.3V)
Function
CPS
Pins
Open
Close
VR1
3-4
5-6
VR2
3-4
5-6
Description
Normal
Clear password
SE 440BX(2)
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Performance
Problems
Description
ATX
Pentium II/Katmai
440BX
AMI
3 PCI/1 ISA
768 Mb
2S, 1P, USP, PS/2
AGP
Yamaha XG
Notes
Slot 1
3 DIMM sockets
UDMA 3
Poor
Poor documentation
SR 440BX
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Audio
Description
ATX
Pentium II
440BX
4 PCI/2 ISA
512 Mb
2S, 1P, USP, PS/2
nVIDIA Riva TNT
SB PC164D
Notes
Description
ATX
Pentium III
Intel 820
5 PCI/1 AMR
1024 Mb RDRAM
2S, 1P, USP, PS/2
AGP
ES1373
Notes
Slot 1
2 DIMM sockets
UDMA/33
16 Mb
ESS?
VC 820
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Audio
Performance
Comments
Slot 1
3 RIMM sockets
UDMA/66 100-133
Poor
Also look at the SuperMicro PIIISCE
VS440FX
CPU speed
200 MHz
180 MHz
166 MHz
150 MHz
Host bus speed
66 MHz
60 MHz
66 MHz
60 MHz
Pins
19-21
17-19
19-21
17-19
12-14
12-14
10-12
10-12
9-11
9-11
11-13
11-12
295
296
The PC Engineer’s Reference Book – Vol 2: Motherboards
Function
CMOS Clear
Pins
20-22
18-20
27-29
25-27
28-30
26-28
4-6
2-4
Password Clear
Setup Access
BIOS Recovery
Front Panel header
1-2
3-4
6-11
13-16
18-20
22-23
24-27
Description
Keep*
Clear
Keep*
Clear
Enabled*
Disabled
Normal*
Recovery mode
Power On
Sleep
IR
HDD LED
Power LED
Reset
Speaker
VL-601
Clock settings set in CMOS
CPU
Bus
333 MHz
66
300 MHz
66
266 MHz
66
233 MHz
66
Ratio
5x
4.5x
4x
3.5x
FREQ4
Close
Close
Close
Close
FREQ3
Open
Open
Open
Close
FREQ2
Open
Close
Close
Open
FREQ1
Open
Open
Close
Open
VT-502
Intel
CPU
233 MHz
200 MHz
166 MHz
150 MHz
133 MHz
120 MHz
100 MHz
90 MHz
75 MHz
Host
66
66
66
60
66
60
66
60
50
CLK1
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
Not supported
CLK2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
CLK3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
Ratio
3.5x
3x
2.5x
2.5x
2x
2x
1.5x
1.5x
FREQ1
1-2
1-2
2-3
2-3
2-3
2-3
1-2
1-2
FREQ2
1-2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
FREQ3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
AMD
CPU
K6-233
K6-200
K6-166
K5-PR200
K5-PR166
K5-PR150
K5-PR133
K5-PR120
K5-PR100
K5-PR90
K5-PR75
Host
66
66
66
66
66
60
66
60
66
60
50
CLK1
1-2
1-2
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
Not supported
CLK2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
CLK3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
Ratio
3.5x
3x
2.5x
2x
1.75x
1.75x
1.5x
1.5x
1.5x
1.5x
FREQ1
1-2
1-2
2-3
1-2
2-3
2-3
1-2
1-2
1-2
1-2
FREQ2
1-2
2-3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2
FREQ3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
Cyrix
CPU
M2 200
M2 166
Host
66
60
CLK1
2-3
2-3
CLK2
1-2
1-2
CLK3
2-3
1-2
Ratio
3x
2.5x
FREQ1
1-2
2-3
FREQ2
1-2
2-3
FREQ3
1-2
2-3
I
CPU
P200+
P166+
P150+
P133+
P120+
Host
66
60
55
50
CLK1
Not supported
1-2
2-3
2-3
Not supported
CPU Voltage
P54C STD, VR (3.3V)
P54C VRE (3.5V)
P55C (2.8V/3.3V)
AMD K5 "B" (3.5V)
AMD K6-166/200 (2.9V/3.3V)
Cyrix 3.52V (028)
Cyrix 6x86L (2.8V/3.3V)
Cyrix 6x86MX (2.9V/3.3V)
CLK2
CLK3
Ratio
FREQ1
FREQ2
FREQ3
1-2
1-2
2-3
2-3
2-3
2-3
2x
2x
2x
2-3
2-3
2-3
1-2
1-2
1-2
1-2
1-2
1-2
VR1
1-2
3-4
9-10
1-2
7-8
1-2
9-10
7-8
VR2
Open
Open
1-2,3-4
Open
1-2,3-4
open
1-2,3-4
1-2,3-4
VT-503
Clock speed is determined in CMOS.
Intel
CPU
233 MHz
200 MHz
166 MHz
150 MHz
133 MHz
120 MHz
100 MHz
90 MHz
75 MHz
Host
66
66
66
60
66
60
66
60
50
Ratio
1.5x
3x
2.5x
2.5x
2x
2x
1.5x
1.5x
1.5x
FREQ1
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
FREQ2
1-2
2-3
2-3
2-3
1-2
1-2
1-2
1-2
1-2
FREQ3
1-2
1-2
2-3
2-3
2-3
2-3
1-2
1-2
1-2
AMD
CPU
K6-300
K6-266
K6-233
K6-200
K6-166
K5-PR200
K5-PR166
K5-PR150
K5-PR133
K5-PR120
K5-PR100
K5-PR90
CPU
M2 266
M2 233
M2 200
M2 166
P166+
P150+
P133+
Host
66
66
66
66
66
66
66
60
66
60
66
60
Host
66
66
60
60
66
60
55
Ratio
4.5x
4x
3.5x
3x
2.5x
2x
1.75x
1.75x
1.5x
1.5x
1.5x
1.5x
Ratio
3.5x
3x
3x
2.5x
2x
2x
2x
FREQ1
2.3
2-3
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
FREQ1
1-2
1-2
1-2
1-2
1-2
1-2
1-2
FREQ2
2-3
1-2
1-2
2-3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2
FREQ2
1-2
1-2
1-2
2-3
1-2
1-2
1-2
FREQ3
2-3
2-3
1-2
1-2
2-3
1-2
2-3
2-3
1-2
1-2
1-2
1-2
FREQ3
1-2
1-2
1-2
2-3
2-3
2-3
2-3
297
298
The PC Engineer’s Reference Book – Vol 2: Motherboards
CPU Voltage
P54C STD, VR (3.3V)
P54C VRE (3.5V)
P55C (2.8V/3.3V)
AMD K6 166,200 (2.9V/3.3V)
AMD K6 233 (3.2V/3.3V)
AMD K6 266,300 (2.1V/3.3V)
Cyrix 6x86MX (2.9V/3.3V)
VR1
1-2,5-6,7-8
1-2,3-4,5-6,7-8
7-8
1-2,7-8
5-6,7-8
1-2
1-2,7-8
VX
Jumper
JP 4
JP 5
JP 6
JP 7
JP 14
Position
On
Off
1-2
2-3
Open
1-2
2-3
Function
12v Flash ROM
5v or EPROM
ISA Clock PCI/4
PCI/3
Sleep switch
SDRAM voltage
3.5v CPU voltage (Vre)
3.38v (Std, Vr)
Inventa
Inventec
Itri
Iwill
Quick Technology. www.iwill.com www.iwillusa.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC
BC
DC
Motherboard
P54TS/P55TV Lite
P55XUB
T54TS
Code
DC
EC
Motherboard
P55TU
P54TSW2
DBS100
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II
Intel 440BX
4 PCI/2 ISA
1 Gb
2 EIDE, floppy USB, IR
Notes
SMP Slot 1
4 DIMM sockets
Adaptec AIC-7895P
AGP 2x
J
Jamicon
(818) 333 9168
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
Motherboard
KM-T5-V2
Code
Motherboard
Jaton Corp
www.jaton.nl
JBond
J. Bond Computer Systems. www.jbond.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
1C-00
9C-02
Motherboard
PCI 400C-C
PCI 500C-B or -C
PCI 500C-H
Code
A-00
AC-01
HC-00
Motherboard
PCI 500C-D
PCI 500C-H2
PCI 500C-E
PCI400C-A
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Description
486
66
Saturn
Phoenix
3 PCI/4 ISA
Notes
DX2-66, P24T
2 PCI/5 ISA? 1 each shared
4 72-pin 36-bit SIMMs, in identical pairs
300
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
I/O
Problems
Description
Notes
Built-in NCR SCSI
Disable L2 Cache for reliable SCSI operation.
Description
Notes
486
SiS
3 PCI/4 ISA
128
2S, 1P
P24T. 5 and 3.3v
PCI400C-C
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Comments
PCI are busmasters
Later revision of 400-A
PCI500C-A
Item
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Performance
Description
Mercury
Phoenix
4 PCI/4 ISA
Notes
4 72-pin sockets
512 Kb
NCR 53c810 SCSI
Disable CPU Cache (L1) for reliable operation, at least on early boards.
JDR Microdevices (HK)
2theMax. www.2themax.com
Jetta
(908) 329 9651
Jetway
Also known as Jet Fair or maybe Jetboard. www.jetway.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0
1
1-00
1C
1-00
9
9C
9C-00
9C-00
Motherboard
J 403TG
J 403TG
J 433, 435 or 437
J 656-VXD/J 646C
J 636/J 446 A v2.0
J 636
J 656/VXB
J 5TXBR2/J 648A/J 636
J 446 A V2.0
Code
AC
AC-00
CC
CC-00
DC
U
H
HC
W
Motherboard
J 656HXA
J 656VXA
J 656B
J 656VXB v3.0 or 656VXC/P
J 656C/VXB
J 756A (P Pro)
J 426
J 426
J 646A
J 5TXC/L
Jumper
JP2
JP3
JP4
Position
2-3
3-4
1-2
2-3
1-2
3-4
5-6
7-8
Function
Normal
Clear CMOS
12v Flash ROM
5v Flash ROM
CPU voltage
J
Jumper
Position
In
Out
In
Out
In
Out
In
1
Off
Off
Off
Off
Off
On
On
4
Off
Off
Off
On
U22
In
In
Out
Out
Out
Out
Out
2
Off
Off
On
On
Off
Off
On
5
Off
Off
On
On
In
In
In
In
Out
Out
Out
3
Off
On
On
Off
Off
On
On
6
On
Off
Off
On
In
In
In
In
In
In
Out
Function
3.52 (single)
3.45
3.3
3.2
2.9
2.8
2.1
Clock multiplier
1.5x
2x
2.5x
3x
3.5x
4x
4.5x
Bus frequency
60 MHz
66 MHz
75 MHz
83 MHz
J 571B
Item
Form Factor
CPU
Speeds
Chipset
Bus
Memory
Cache (K)
I/O
Jumper
JP3
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JP7
JP13
TB-SW
Voltage
2.1V
2.8V
2.9V
3.2V
3.3V
3.45V
3.52V
Description
Baby AT
Pentium
75-300
SiS 5571
3 PCI/4 ISA
256
512
2S, 1P, IR, Floppy, EIDE, PS/2, USB
1-2
open
open
open
open
open
open
Short
3-4
open
open
open
open
open
Short
open
Notes
22 x 22 cm
P54C/Cyrix M1/AMD K5, Intel P55C (MMX)/Cyrix M2 (MMX)/AMD K6 (MMX)
FPM, EDO, SDRAM. 2 x 72-pin SIMMs and 2 x 168-pin DIMMs (3.3V).
Pipelined Burst SRAM
Function
5v Flash ROM (SST, Winbond)
12v (Intel)
Normal
Clear CMOS
3.3v CPU
3.45v CPU
SMI suspend switch
Turbos switch
5-6
open
open
open
open
Short
open
open
7-8
open
open
open
Short
open
open
open
9-10
open
open
Short
open
open
open
open
11-12
open
Short
open
open
open
open
open
13-14
Short
open
open
open
open
open
open
656VXA
Jumper
JP 15
Position
1-2
Function
12v Flash ROM (Intel, MXIC)
301
302
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP 17
J 20
JP 18-20
JP 21,22
JP 16,25,27,28
JP 33
Position
2-3
Short
Open
3-4,5-6
3-4
5-6
Open
JP 18
Closed
Open
Open
JP21
Open
Closed
Closed
Open
JP16
1-2
1-2
Open
Closed
JP19
Open
Closed
Open
JP22
Open
Open
Closed
Closed
JP25
1-2
2-3
JP20
Open
Open
Closed
JP27
1-2
2-3
JP28
1-2
1-2
J-Mark
656VXA
See under Jetway
JossTech
www.josstech.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
9C-00
AC
Motherboard
JT 586IP4
JT 586TS4/IV4
JT 586TS4
Code
BC
C-00
Motherboard
JT 586TS4
J 646C
Function
5v (SST, Winbond)
ISA clock PCI/4
PCI/3
50 MHz Ext clock
55
60
66
CPU Voltage
3.3v
3.45v
3.6v
CPU Frequency Ratio
1.5
2
2.5
3
Cache size
256K
256K + 256K module (512K)
Normal
Clear CMOS
K
Kaimei
Association with Jamicon?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0C-00
Motherboard
KM-S4-1 PCI rev 5.1
KM-S4-1 PCI rev 5.1
Same as Azza 4SIG or Rectron RT-4S3
Kam-Tronic
MegaStar
megastar.kamtronic.com
Kapok
Kinpo
Koutech Systems
www.koutech.com
Code
2C-00
Motherboard
KM-S4-1 v4.2/4.3
304
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
L
LAN Plus
www.lan-plus.com
Lanix
www.lanix.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1C
Motherboard
PM 900
Code
Motherboard
Lanner
Leading Edge
D3/SX
Jumper
15
Position
1-2
2-3
Function
Enable mouse
Disable
Lexar
Out of Business.
LXM-510(D)
Item
CPU
Chipset
BIOS
Description
486
IMS
Award/AMI Flash
Notes
P24T. For 3.3v CPUs, use Model 99 Regulator
Integrated Micro Solutions
306
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Bus
Memory (Mb)
I/O
Comments
Description
2 PCI/2 ISA/2 VL
128
2S, 1P, PS/2
Notes
8 30-pin sockets
Early boards had separate connectors for PCI 3.3v, later replaced with separate voltage regulator. Manual is
rubbish.
Lucky Star
www.lucky-star.com.tw
Something to do with Flamingo?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
2C-00
3
3C
9C
9C-00
Motherboard
P 407 rev 2
4C-1
LS 486E
6LX2/ P54CE/5V-2
CH5T
Code
AC
BC-00
CC-00
FC
Motherboard
6AlX2 (Jumperless)
P55CE Rev DW83707/87
P55CE-C2/P54CE
P54CE
P54CE
Same as Flamingo 5I-VX1C
5I-VX1C
Same as Flamingo MB-FLM-TX01
6ABX2V
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Comments
Lucky Tiger
Description
ATX
Pentium II
550 MHz
440BX
Award 4.51PG
5 PCI/2 ISA
768 Mb
2S, 1P, USP, PS/2
Notes
Slot 1
Faster with DIP switch version of board
3 DIMM sockets
UDMA 3
AGP
Only 2 jumpers
M
Macrotech
Matra
(818) 855 1820
Matsonic
www.matsonic.com
Megastar
www.megastar.kamtronic.com
Mega System Co
www.computersources.com.hk/mega/
Megatrends Technology
www.megacom.com
Memorex Telex
7006
Jumper
JP1
JP5
Position
1-2*
2-3
Out
Function
256K SIP DRAM for EMS
1 Mb SIP DRAM for EMS
Disable video IRQ2
308
The PC Engineer’s Reference Book – Vol 2: Motherboards
7010
Jumper
JB1
JB2
JB3
JB4
JB5,7
JB6
JB8
JB9
JB10
JB11
JB12
JB13,14
Position
A
In
Out
In
Out
A
B
JB5
Out
Out
In
In
A
B
A
B
In
Out
In
Out
A
B
A
B
JB13
Out
Out
In
In
JB7
Out
In
Out
In
JB14
Out
In
Out
In
Function
Mono monitor
EGA
Mono
Hercules video
Disable
27256 Video BIOS EPROM
27128 Video BIOS EPROM
Boot Select
Unused
Boot from network
Unused
Unused
27256 BIOS EPROM
27512 BIOS EPROM
RAM size select unsued
640K
Enable COM2
Disable
Enable extended diagnostics
Disable
LAN IRQ9
LAN IRQ5
Disable LAN
Enable LAN
LAN response time
74.7 ms
283.4 ms
561.8 ms
1118.6 ms
7022
Jumper
W2
W3
W4
W5
W9
W11
W12
W15
W16
Position
1-2*
2-3
1-2
2-3*
1-2
2-3*
1-2*
2-3
1-2
2-3*
1-2
2-3*
1-2*
2-3
In*
Out
Function
0.7 wait state
0 wait state
Mono display
Colour display
Disable floppy
Enable floppy
HD floppy write current
HD floppy RPM
12 MHz maths copro
16 MHz maths copro
Disable VGA
Enable VGA
IDE access
Enable IRQ9
Disable
Enable PS2 mouse (IRQ12)
Disable
Position
Out
In
Out
Function
Enable VGA
Disable
ANSI 3.5" (ignore pin 2)
7025
Jumper
W2
1W8
M
Jumper
W9
W12
Position
1-2
2-3
Out
In
Out
In
Function
AT 3.5" diskette
PS/2 3.5" diskette
Normal POST
Continuous POST
Mono display (not with VGA)
Colour display (not with VGA)
7040
Jumper
ST1
ST2
ST3
ST4
ST6
ST7
ST9
ST10
ST11
ST12
ST18
ST22
ST23
ST26
ST32
ST34
ST37
ST 38
ST39
ST40
ST42
ST44,45
SW2
S1-2
SW2
S3-4
Position
1-2*
2-3
In*
In*
Out
1-2*
2-3
In*
In*
Out
In*
In*
Out
In
Out*
In*
Out
In*
In*
Out
In*
Out
1-2*
2-3
In*
Out
1-2
2-3*
In
Out*
In*
In*
Out
1-2
2-3*
In*
Out
ST44
In*
Out
S1
Off
On
On
Off
S3
Off
ST45
In*
Out
S2
Off
On
Off
On
S4
Off
Function
IRQ10=SCSI HD
IRQ14=ST506 HD
SCSI controller enabled
SCSI DMA (DACK3) enabled
Disabled
27256 ROM BIOS
27512 ROM BIOS
Enable COM1
Enable PS/2 mouse (IRQ12)
Disable
Enable COM2
Floppy enabled
Disabled
Extension 512K or 2 Mb enabled
Disabled
640K onboard RAM enabled
Disabled
Enable VGA
I/O wait state generator enabled
Disabled
Enable DMA2 for floppy
Disable
Enable LPT1 (378h)
Enable LPT2 (278h)
Long ALE enabled
Disabled
LPT2 IRQ5 enabled
LPT1 IRQ7 enabled
6v battery
2 x 3v batteries
Enable SCSI DMA (DRQ3)
COM2 IRQ3 enabled
Disabled
External battery
Internal battery
COM1 IRQ4 enabled
Disabled
VGA
Enable
Disable
Display Type
VGA
EGA
Mono
CGA
Language
French
309
310
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
SW2
S5
SW2
S6
Position
On
On
Off
On
Off
On
Off
Function
Spanish
English
German
ST506 interface
SCSI interface
HD IRQ14 (ST 506)
HD IRQ10 (SCSI)
Off
On
On
7045/D
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
JP11
JP12
JP13
JP14
JP15
JP17
JP18
JP19
JP20
Display
Analogue
Enh RGB
Colour RGB
TTL mono
Disabled
Position
1-2
2-3*
1-2*
2-3
1-2
2-3*
1-2*
2-3
1-2
2-3*
1-2
2-3*
Out*
1-2*
2-3
Out*
1-2
2-3*
1-2*
2-3
1-2
2-3*
All out
1-2
2-3*
All out
1-2
2-3*
1-2
2-3
1-2
2-3
1-2
2-3
S2
Off
On
Off
Off
Off
Function
COM1 IRQ4
COM2 IRQ3
COM2 IRQ4
COM1 IRQ3
Reserved
27128 EPROM
27256 EPROM
12 MHz CPU clock
8 MHz CPU clock
Auto reset
POST once
Enable HD controller port 157h
Disable HD
Reserved
Enable floppy
Disable
Reserved
Floppy address 37xh
Floppy address 3Fxh
16-bit video
8-bit video
Reserved
COM1 2F8h
COM1 3F8h
Disable
COM2 2F8h
COM2 3F8h
Disable
Not used
36 MHz video clock (800x600)
Disable video
Enable video
LPT IRQ7
LPT IRQ5
Enhanced colour display
Mono/colour display
S3
Off
On
Off
On
Off
S4
Off
Off
On
Off
Off
S5
Off
On
On
On
Off
S6
Off
Off
Off
Off
Off
JP12
1-2
1-2
1-2
1-2
2-3
JP18
2-3
2-3
2-3
2-3
1-2
JP20
1-2
1-2
2-3
2-3
1-2
M
7065
Jumper
JP5
JP6-7
JP8
JP9-10
JP11
JP12
JP13
JP20,21
JP22
JP24
Position
1-2*
2-3
JP6
1-2
2-3*
1-2
2-3*
JP9
1-2
2-3*
1-2
2-3*
1-2*
2-3
1-2
2-3*
JP20
In*
Out
1-2
2-3*
1-2
2-3*
JP7
1-2*
2-3
JP10
1-2*
2-3
JP21
Out*
In
Function
LPT1 IRQ7
LPT2 IRQ5
COM IRQ
COM2 IRQ4
COM1 IRQ3
LPT2 278h
LPT1 378h
COM Address
COM2 2F8h
COM1 3F8h
HD adapter installed
Not installed
Floppy enabled
Disabled
Floppy address 38xh
Floppy address 3Fxh
Clock speed
8 MHz
10 MHz
Reserved
Normal boot
80387 installed
Not installed
7070
Jumper
JP5
JP6-8
JP9
JP9 (?)
JP9
SW1
S1-4
SW1
S5
SW1
S6
SW1
S7
SW1
S8
Position
1-2
2-3*
JP6
1-2
2-3
1-2*
2-3
1-2
2-3*
In
Out
S1
Off
On
Off*
On
Off
On*
Off*
On
Off*
On
JP7
1-2
2-3
JP8
1-2
2-3
S2
Off
On
S3
On
Off
Function
27512 ROM
27256/27128 ROM
Maths copro
Enable
Disable or WTL1167*
Disable maths copro
Enable
4 Mb DRAM
2 Mb DRAM
4 Mb DRAM
2 Mb DRAM
S4
On
Off
Rev C & C1 boards
ROM Type
27256/27512
27128*
MDA/EGA display
CGA
20 MHx system speed
Smart mode
Modes 3 & 4 memory mapping
Reserved
RAM BIOS location
ROM BIOS location
311
312
The PC Engineer’s Reference Book – Vol 2: Motherboards
Mentor
Award BIOS ID
The last two numbers of the BIOS part number.
Code
CC-00
Motherboard
BN 533T
Code
Motherboard
BN 533T
Same as Informtech 533T-AT
Mercury Computer Corp
www.m-group.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
W586VX/TXA
Code
AC
Motherboard
W586VXL
Microfive
Made boards (with BIOSes) for Samsung.
Microgram
Micronics
www.micronics.com Recently acquired by Diamond Multimedia, together with Orchid.
Award BIOS ID
The last two numbers of the BIOS part number.
Code
DC
Motherboard
D5CUB
Code
80386SX Cache
Jumper
W1
W2
W3
W4
W5
W6
Position
1-2
Out
Out
Out
1-2*
2-3
1-2,3-4
2-3
Out
Function
CGA
Mono
Reserved
Reserved
Normal Operations
Clear CMOS
4 Mb SIMMs not installed
4 Mb SIMMs installed
Reserved
80386SX (Non-Cache)
Jumper
J2
Position
1-4
2-3
3-4
Function
External battery
Enable Onboard battery
Clear CMOS
Motherboard
M
Jumper
JP2
JP13
Position
In
Out
12-13
15,16,17
19-20
7,8,9,10
1,2,3,4,5
Function
Colour monitor
Mono
Turbo LED
Turbo switch
Reset switch
Speaker
Keylock/Power
80486-50 EISA 2
Jumper
W1
W2,6,8
W3
W4,5,7
W9
W10
W11
W12
W14, 17-19
Position
W2
1-2
1-2
2-3
2-3
1-2
W4
1-2
1-2
2-3
2-3
W6
1-2
1-2
1-2
1-2
W8
1-2
2-3
1-2
2-3
W5
2-3
2-3
2-3
2-3
W7
2-3
1-2
1-2
2-3
W14
2-3
1-2
W17
Out
1-2
W18
Out
1-2
W19
Out
1-2
Function
Reserved
COM ports
Enable COM1 & 2
Enable COM1, disable COM2
Enable COM2, disable COM1
Disable COM1 & 2
Enable onboard floppy (2-3 disable)
Parallel Port
LPT1 3BC-3BE
LPT2 378-37A
LPT3 278-27A
Disabled
Reserved
Reserved
Reserved
Reserved
Cache interleave
64K
256K
Switch 1
Switch
S1-5
Position
S1
On
Off
On
Off
On
On
On
Off
Off
On
Off
On
Off
Off
On
On
On
Off
Off
On
Off
On
Off
Off
S2
On
On
Off
Off
On
On
Off
On
On
Off
Off
Off
Off
Off
On
On
Off
On
On
Off
Off
Off
Off
Off
S3
On
On
On
On
Off
Off
On
On
Off
Off
On
Off
Off
Off
Off
Off
On
On
Off
Off
On
Off
Off
Off
S4
On
On
On
On
On
Off
Off
Off
On
Off
Off
On
Off
On
On
Off
Off
Off
On
Off
Off
On
Off
On
S5
On
On
On
On
On
On
On
On
On
On
On
On
On
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Function
Total Memory (Mb)
1
2
3
4
4
5
6
7
8
9
10
12
13
16
16
20
24
28
32
36
40
48
52
64
313
314
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
S6
S7
S8
Position
On*
Off*
On*
Off
Function
Reserved
Reserved
Colour display
Mono
80486 ASIC EISA
Jumper
W1, 11,12,45
W2,8 ,9
W3,4,10
W13
W20,21
W41,44
Position
W2
1-2
1-2
2-3
2-3
W3
1-2
1-2
2-3
2-3
1-2
W20
Out
1-2
W8
1-2
1-2
1-2
1-2
W4
2-3
2-3
2-3
2-3
W9
1-2
2-3
1-2
2-3
W10
2-3
1-2
1-2
2-3
W21
Out
1-2
W41
Out
1-2
Function
Reserved
COM ports
Enable COM1 & 2
Enable COM1, disable COM2
Enable COM2, disable COM1
Disable COM1 & 2
Parallel Port
LPT1 3BC-3BE
LPT2 378-37A
LPT3 278-27A
Disabled
Enable onboard floppy
Cache interleave
64K
256K
W44
2-3
1-2
Switch 1
As for 80486-50 EISA 2
EISA 3
Jumper
J7,10
J6
J12
Position
J7
In
Out
Out
1-2,3-4
3-4
In
Out
J10
In
In
Out
Function
CPU settings
SX25, DX2-50
SX33, DX33, DX2-66
DX50
486DX
486SX
Colour display
Mono
Baby Gemini 386
Switch 1
Switch
S1-5
Position
S1
On
Off
On
Off
On
On
On
Off
Off
On
Off
On
Off
Off
On
S2
On
On
Off
Off
On
On
Off
On
On
Off
Off
Off
Off
Off
On
S3
On
On
On
On
Off
Off
On
On
Off
Off
On
Off
Off
Off
Off
S4
On
On
On
On
On
Off
Off
Off
On
Off
Off
On
Off
On
On
S5
On
On
On
On
On
On
On
On
On
On
On
On
On
On
Off
Function
Total Memory (Mb)
1
2
3
4
4
5
6
7
8
9
10
12
13
16
16
M
Switch
S6
S7
S8
Position
On
On
Off
Off
On
Off
On
Off
Off
On*
Off*
On*
Off
On
Off
On
On
Off
Off
Off
Off
Off
Off
On
On
Off
Off
On
Off
Off
Off
Off
Off
Off
On
Off
Off
On
Off
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
Function
20
24
28
32
36
40
48
52
64
Reserved
Reserved
Colour Display
Mono
Switch 2
Jumper
W3
S1
S2
S3
S4
S5
S5
S7
S8
Position
Out*
Off*
On
Off
Off*
Off*
Off*
Off*
Off*
Off*
Function
Reserved
Reserved
33 MHz
40 MHz Possibly same for SW1-8
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Baby Gemini 486(/50)
Jumper
W1
W4
W15
J100
J101
Position
1-2
Out
1-2
Out
1-2
2-3
1-2
2-3
Function
256K cache
64K cache
32Kx8 SRAM
8Kx8 SRAM
256K cache interleave
64K cache interleave
Reserved
Reserved
Position
Off*
Off*
On*
Off*
Off*
Off*
On*
Off*
Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Switch 1
Jumper
S1
S2
S3
S4
S5
S5
S7
S8
Switch 2
Switch
S1-5
Position
S1
On
Off
On
Off
S2
On
On
Off
Off
S3
On
On
On
On
S4
On
On
On
On
S5
On
On
On
On
Function
Total Memory (Mb)
1
2
3
4
315
316
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
Position
On
On
On
Off
Off
On
Off
On
Off
Off
On
On
On
Off
Off
On
Off
On
Off
Off
On
On
Off
On
On
Off
Off
Off
Off
Off
On
On
Off
On
On
Off
Off
Off
Off
Off
Off
Off
On
On
Off
Off
On
Off
Off
Off
Off
Off
On
On
Off
Off
On
Off
Off
Off
On
Off
Off
Off
On
Off
Off
On
Off
On
On
Off
Off
Off
On
Off
Off
On
Off
On
On
On
On
On
On
On
On
On
On
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Function
4
5
6
7
8
9
10
12
13
16
16
20
24
28
32
36
40
48
52
64
S5
On
On
On
On
On
On
On
On
On
On
On
On
On
On
Off
Off
Function
Total Memory (Mb)
1
2
3
4
4
5
6
7
8
9
10
12
13
16
16
20
Baby Gemini 486DX2
Jumper
W3,4
W15
Position
W3
Out
In
1-2
2-3
W4
Out
In
Function
External cache
64K
256K
256K cache interleave
64K cache interleave
Switch 1
Jumper
S1
S2
S3
S4
S5
S5
S7
S8
Position
Off*
Off*
On*
Off*
Off*
Off*
On*
Off*
Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Switch 2
Switch
S1-5
Position
S1
On
Off
On
Off
On
On
On
Off
Off
On
Off
On
Off
Off
On
On
S2
On
On
Off
Off
On
On
Off
On
On
Off
Off
Off
Off
Off
On
On
S3
On
On
On
On
Off
Off
On
On
Off
Off
On
Off
Off
Off
Off
Off
S4
On
On
On
On
On
Off
Off
Off
On
Off
Off
On
Off
On
On
Off
M
Switch
S6
S7
S8
Position
On
Off
Off
On
Off
On
Off
Off
On*
Off*
On*
Off
Off
On
On
Off
Off
Off
Off
Off
On
On
Off
Off
On
Off
Off
Off
Off
Off
On
Off
Off
On
Off
On
S3
On
On
On
On
Off
Off
On
On
Off
Off
On
Off
Off
Off
S4
On
On
On
On
On
Off
Off
Off
On
Off
Off
On
Off
On
Off
Off
Off
Off
Off
Off
Off
Off
Function
24
28
32
36
40
48
52
64
Reserved
Reserved
Colour Display
Mono
256K cache?
64K cache?
Baby Gemini 486SX
Switch
S1-4
S5,8
S6,7
Position
S1
On
Off
On
Off
On
On
On
Off
Off
On
Off
On
Off
Off
On*
Off*
S2
On
On
Off
Off
On
On
Off
On
On
Off
Off
Off
Off
Off
Function
Total Memory (Mb)
4
8
12
16
16
20
24
28
32
36
40
48
52
64
Reserved
Reserved
C400
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium II/Celeron
Slot 1
440 BX
Award 4.51PG
5 PCI/2 ISA
768 Mb
1 each shared
3 DIMM sockets
2 EIDE, floppy, USB
AGP
Substandard
Mini 486
Jumper
W1
W3
Notes
Position
1-2*
2-3
In
Out
Function
Normal ops
Discharge CMOS
Colour display
Mono
317
318
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
W12
Position
1-2
2-3
Function
Overdrive/487SX
SX/DX/DX2
JX 30
Part number 09-00183-xx. There is an LED between slots #5 and #6
Item
Form Factor
CPU
Bus
Memory (Mb)
I/O
Jumper
S1-4
W5
W6
W8
Description
Baby AT
Notes
ZIF socket for Overdrive
7 ISA/2 VL
4 SIMM sockets
IDE, floppy, 2S 1P
Position
S1
Off
On
1-2
2-3
In
Out
1-2
2-3
S2
On
On
S3
Off
Off
S4
Off
Off
W65
1-2
1-2
2-3
W66
2-3
1-2
2-3
W67
2-3
1-2
2-3
W11
W12
W13
W14
W31
W40
W64-68
W70
W71
W64
1-2
2-3
2-3
1-2
2-3
1-2
2-3
W68
1-2
2-3
2-3
J6
J33
J34
Function
Motherboard Speed
33 MHz
25 MHz
LPT Input mode (scanner)
LPT Output mode
Colour monitor installed
Mono
Flash ROM in recovery mode
Normal - jumper NOT moved for Flash update
IDE LED
Reset
Turbo LED
Turbo switch
Clear CMOS
Must be removed to support local bus DMA when Local Bus
Master controllers are installed.
Cache
64K
128K
256K
486SX
486DX, 486DX2 & P24T
PQFP 486SX with Overdrive SX
PQFP 486SX with DX, or DX2 CPU
Battery Connector
Speaker
Keylock/Power
JX 30G
Part number 09-00189-xx. There is an LED between slots #5 and #6
Item
Form Factor
CPU
Bus
Memory (Mb)
I/O
Jumper
S1-4
Description
Baby AT
Notes
ZIF socket for Overdrive
7 ISA/2 VL
4 SIMM sockets
IDE, floppy, 2S 1P
Position
S1
Off
On
S2
On
On
S3
Off
Off
S4
Off
Off
Function
Motherboard Speed
33 MHz
25 MHz
M
Jumper
W2
W3
Position
In
Out
In
Out
W4
W5
W7
W8
W10,11
22-24
W12
W13
W16,17
W18
W19
W20
W21
W71
1-2
2-3
1-2
2-3
W10
1-2
1-2
2-3
1-2
2-3
1-2
2-3
W16
1-2
1-2
2-3
W11
1-2
2-3
2-3
W22
2-3
1-2
2-3
W23
2-3
1-2
2-3
W24
1-2
2-3
2-3
W17
2-3
2-3
2-3
1-2
2-3
J8
J30
J31
319
Function
Colour monitor installed
Mono
PS/2 mouse IRQ12 enabled
Disabled
Must be removed to support local bus DMA when Local Bus Master
controllers are installed.
Clear CMOS
LPT Input mode (scanner)
LPT Output mode
Flash ROM in recovery mode
Normal - jumper NOT moved for Flash update
Cache
64K
128K
256K
486SX
486DX, 486DX2 & P24T
PQFP 486SX Enabled
Disabled
Cache
64K
128K
256K
Turbo LED
Turbo switch
Reset
IDE LED
with Overdrive SX
PQFP 486SX with DX, or DX2 CPU
Battery Connector
Speaker
Keylock/Power
JX 30GC
Part number 09-00203-xx. There is an LED between slots #5 and #6
Item
Form Factor
CPU
Bus
Memory (Mb)
I/O
Jumper
S1-4
W2
Description
Baby AT
ZIF socket for Overdrive
7 ISA/2 VL
4 SIMM sockets
IDE, floppy, 2S 1P
Position
S1
Off
Off
In
Out
W4
W5
W8
W12
Notes
1-2
2-3
1-2
2-3
S2
On
On
S3
Off
Off
S4
Off
Off
Function
Motherboard Speed
33 MHz
25 MHz
Colour monitor installed
Mono
Must be removed to support local bus DMA when Local Bus Master
controllers are installed.
Clear CMOS
Flash ROM in recovery mode
Normal - jumper NOT moved for Flash update
486SX
486DX, 486DX2, 486DX/4 & P24T
320
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
W13
W10,11
22-24
W16,17
W18
W19
W20
W21
W36
W37
W38
W71
Position
1-2
2-3
W10
1-2
1-2
2-3
W16
1-2
1-2
2-3
W11
1-2
2-3
2-3
W17
2-3
2-3
2-3
W22
2-3
1-2
2-3
W23
2-3
1-2
2-3
1-2
2-3
1-2
2-3
J8
J30
J31
W24
1-2
2-3
2-3
Function
PQFP 486SX Enabled
Disabled
Cache (W/T)
64K
128K
256K
Cache (W/B)
64K
128K
256K
Turbo LED
Turbo switch
Reset
IDE LED
LPT IRQ7
LPT IRQ5
Reserved
Reserved
with Overdrive SX
PQFP 486SX with DX, or DX2 CPU
Battery Connector
Speaker
Keylock/Power
VL-Bus
Jumper
W13
W16
W20
Position
1-2
2-3
2-3
1-2
2-3
1-2
Function
DX/DX2
SX
LPT output mode
LPT input mode
Flash memory normal
Flash memory recovery
SW 8
Switch
S1-4
S5-8
Position
S1
On
Off
On
Off
On
On
On
Off
Off
On
Off
On
Off
Off
S5
Off
On
S2
On
On
Off
Off
On
On
Off
On
On
Off
Off
Off
Off
Off
S6
On
Off
S3
On
On
On
On
Off
Off
On
On
Off
Off
On
Off
Off
Off
S7
Off
On
S4
On
On
On
On
On
Off
Off
Off
On
Off
Off
On
Off
On
S8
Off
Off
M4Pi
Item
Speeds (MHz)
Chipset
Description
486
Intel 82420 (Saturn)
Notes
DX4, P24T
Function
Total Memory (Mb)
4
8
12
16
16
20
24
28
32
36
40
48
52
64
CPU
33 MHz DX2-66
25 MHz DX2-50
M
Item
BIOS
Bus
Memory (Mb)
Cache (K)
Description
Phoenix Flash
3 PCI/6 ISA
128 Mb
512 W/B
Notes
1 each shared. Extra dedicated ISA slot
4 72-pin sockets
256 standard
M5Pi
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Description
Pentium
60, 66
Intel 82430 (Mercury?)
Phoenix Flash
3 PCI/5 ISA
128 Mb
512 W/B
Notes
1 each shared
4 72-pin sockets
256 standard
M54pi
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Description
Pentium
90
Neptune
Phoenix Flash
3 PCI/5 ISA
128
512 W/B
Notes
1 each shared
4 72-pin sockets
256 standard
Micom
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0C-00
Motherboard
MTX A512 TXPro+
Code
Motherboard
MicroStar International (MSI)
www.msi.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0C-00
1-00
1C-00
9-00
9C
9C-00
Motherboard
586MC1 MS 5103
MS 4135
MS 5106 or 596MC2
MS 5117
MS 6117/5145/5146/5147
MS 5137/5117
Code
AC
AC-00
AC
AL-00
BC-00
CC-00
Motherboard
MS 6119
MS 5148
MS 5128
MS 5148
Ingersoll 17M
MS 5156 v1.1
K7T Pro
Item
Form Factor
CPU
Chipset
Bus
Description
ATX
Notes
Socket A
Via KT133
6 PCI
321
322
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Memory (Mb)
I/O
Description
Notes
3 DIMM sockets
PS/2 Mouse and Keyboard, 2 USB, 2 serial, 1 parallel,
2 EIDE, floppy
Video
AGP
LX1
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Video
Performance
Description
ATX
Pentium II
200-333
Notes
Slot 1
AMI 1.2
4 PCI/3 ISA
512 SDRAM 1 Gb EDO
4 DIMM sockets
AGP
Average
LX4
Item
Form Factor
CPU
Speeds (MHz)
Bus
Memory (Mb)
Description
ATX
2 Pentium II
333
5 PCI/2 ISA
512 SDRAM
1 Gb EDO
Performance
Notes
Slot 1
4 DIMM sockets
Below average
MS 5169
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Comments
Description
ATX
Pentium
ALi Aladdin V
AMI HiFlex 1.2
4 PCI/3 ISA
768 Mb
512K
2S, 1P, USP, PS/2
Notes
Super Socket 7
4.5 x CPU clock
100 MHz
3 DIMM sockets
UDMA 3
AGP
Good – but behind TMC T15VG+
Inexpensive
MS 6119
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Comments
Description
ATX
Pentium II
440 BX
Award 4.51PG
4 PCI/3 ISA
768 Mb
2S, 1P, USP, PS/2
Notes
Slot 1
100 MHz
3 DIMM sockets
UDMA 3
AGP
Quick, but Soyo SY-6BA+ is faster
Good documentation
M
MS 6167
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Athlon
AMD-750
Award
5 PCI/2 ISA
768 Mb
The usual
Notes
Slot A
100 FSB
UDMA/66
3 DIMM sockets
AGP 2x
MS 6182
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Audio
Description
ATX
Pentium III
Intel 810E
6 PCI/1 ISA
768 Mb
2S, 1P, USP, PS/2
ESS ES1373
Notes
Slot 1 500 MHz
AMR with TV-out
3 DIMM sockets
UDMA/66
MS 6195
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Comments
Description
ATX
Athlon
AMD 751/756
Award
6 PCI/1 ISA
768 Mb
2S, 1P, USP, PS/2
AGP
Notes
Slot A
AMR with TV-out
3 DIMM sockets
UDMA/66
2x
Fast memory performance
MS 815E Pro
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Description
ATX
Pentium III/Celeron
1000/733
Intel 815E
Award
6 PCI
512 Mb
2 EIDE, floppy, USB, IR
Intel 815 GMCH
Sigmatel STAC9708T
MINT data
Rebadges Biostars.
Notes
Socket 370
FSB 166
UDMA/100
4 DIMM sockets
AGP 4x
323
324
The PC Engineer’s Reference Book – Vol 2: Motherboards
Mirage
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
Motherboard
M54PS
Code
Motherboard
MiTAC
www.mitac.mic.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
2C-00
Motherboard
PH 4500AM or LH 4077C/D
PH 4500AU
Code
9C-00
Motherboard
PH 5400V
LH 4077D
Digicom? AT&T 1455?
Mitsuba
www.mitsuba.com
Mitsubishi
www.mitsubishi-computers.com
Division closed
MLE
(800) 780 3486
Motorola
www.mcg.mot.com
MSI
See MicroStar International
M-Technology
www.mtiusa.com
Refer also to Rise
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
1-00
2-00
Motherboard
R 407
R 526
R 418
Code
A-00
AC
AC
Motherboard
R 526
R 651 (Rise)/R 533
R 525/R 528WP
M
Code
2C
3C-00
4C-00
9C
9C-00
Motherboard
R 418
R 418
R 418
M 549
R 526/R 534(WP)/R-581a
Code
AC-00
BC
CC
CC-00
HC
Motherboard
R 533/R552
R 525
R533
R 534G
R525
PCI-486
Item
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
486
SiS
Award Flash
3 PCI/4 ISA
256
2S, 1P, Floppy
Notes
Check JP48 for correct voltage
8 30-pin sockets, 2 72-pin
64K chips
R407
Jumper
BK SW
JP44
JP45
JP50
JP60
JP61
JP62
Position
1-2
1-2
2-3
1-2
2-3
1-2
2-3
On
On
On
Off
Function
Suspend
VL bus 0 wait state
VL bus 1 wait state
VL bus <=33 MHz
VL bus >33 MHz
Normal
Discharge CMOS
Doze mode
Suspend mode
CGA
Mono
Intel CPU
P24T not recommended, but set as P24D and cut one end of resisitor R24
Junper
DX/2/4
486SX
P24D
JP1
Open
Open
Open
JP2
3-4
3-4
1-2
JP3
Open
Open
2-3
JP4
2-3
2-3
1-2
JP5
2-3
2-3
1-2
JP6
1-2
1-2
1-2
JP7
2-3
2-3
2-3
JP8
3-4
Open
3-4
JP9
1-2,3-4
2-3
1-2,3-4
JP10
3-4
3-4
1-2,3-4
JP11
4-5
4-5
4-5
JP12
Open
Open
Open
JP13
Open
Open
1-2
JP14
Open
Open
1-2
JP15
1-2=2.5x (DX4)
Open
Open
2-3=2x (DX4)
Open=3x (DX4)
JP16
1-2
1-2
1-2
AMD CPU
Junper
JP1
DX, DX/2
DX4-133
Open
DX4/100
DX4/120
Open
DX4/100 V8B
DX4/120 V8B
Open
DX4
SV8B
Open
x5-133
x5-160
Open
325
326
The PC Engineer’s Reference Book – Vol 2: Motherboards
Junper
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
JP11
JP12
JP13
JP14
JP15
JP16
DX, DX/2
DX4-133
3-4
Open
2-3
2-3
1-2
2-3
3-4
1-2,3-4
3-4
4-5
Open
2-3
Open
Open
1-2
DX4/100
DX4/120
3-4
Open
2-3
2-3
1-2
2-3
3-4
1-2,3-4
3-4
4-5
Open
Open
Open
Open
1-2
DX, DX/2
DX4 (5v)
2-3
2-3
Open
2-3
1-2
2-3
1-2
3-4
1-2,3-4
2-3
2-3
Open
Open
Open
Open
1-2
DX, DX/2
DX4 (345v)
2-3
2-3,4-5
Open
2-3
1-2
2-3
1-2
3-4
1-2,3-4
2-3
2-3
Open
Open
Open
Open
1-2
DX4/100 V8B
DX4/120 V8B
1-2,3-4
2-3
1-2
1-2
1-2
2-3
3-4
1-2,3-4
1-2,3-4
4-5
Open
1-2
1-2
Open
1-2
DX4
SV8B
1-2,3-4
2-3
1-2
1-2
1-2
2-3
3-4
1-2,3-4
1-2,3-4
4-5
Open
1-2
1-2
Open
1-2
x5-133
x5-160
1-2,3-4
2-3
1-2
1-2
1-2
2-3
3-4
1-2,3-4
1-2,3-4
4-5
Open
1-2
1-2
2-3
1-2
Cyrix CPU
Junper
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
JP11
JP12
JP13
JP14
JP15
JP16
5x86-100
5x86-120
Open
1-2,3-4
2-3
2-3
1-2
1-2
2-3
3-4
1-2,3-4
1-2,3-4
4-5
Open
Open
1-2
Open
1-2
5x86
GP
Open
1-2,3-4
2-3
2-3
1-2
1-2
2-3
3-4
1-2,3-4
1-2,3-4
4-5
Open
1-2
1-2
Open
1-2
System Speed
Speed
25 MHz
33 MHz
40 MHz
50 MHz
JP25
Short
Short
Open
Open
JP38
Open
Short
Short
Open
JP40
Short
Open
Short
Open
R418
Jumper
JP51
JP49
Position
Open
Short
1-2
2-3
Function
Colour display
Mono display
Retain CMOS data
Clear CMOS
Intel CPU
Junper
JP12
JP13
JP14
JP15
JP16
JP17
DX, DX/2, DX4
2-3
2-3
2-3
Open
3-4
3-4
486SX
2-3
Open
2-3
Open
3-4
3-4
P24T
1-2
1-2
2-3
1-2
3-4
1-2
P24D
1-2
2-3
2-3
Open
1-2,3-4
1-2
x5-133
Open
1-2,3-4
2-3
2-3
1-2
1-2
2-3
3-4
1-2,3-4
1-2,3-4
4-5
Open
Open
1-2
2-3
1-2
M
Junper
JP18
JP19
JP20
JP21
JP22
JP23
JP24
DX, DX/2, DX4
2-3
Open
Open
Open
1-2,3-4
4-5
Open
486SX
Open
Open
Open
Open
2-3
4-5
Open
P24T
Open
Open
Open
1-2 or 3-4
1-2,3-4
1-2
Open
DX, DX/2, DX4
DX4-133 (V8T)
2-3
2-3
2-3
Open
3-4
3-4
2-3
Open
Open
Open
1-2,3-4
4-5
Open
DX4/100 (V8T)
DX4/120 (V8T)
2-3
2-3
2-3
Open
3-4
3-4
Open
Open
Open
Open
1-2,3-4
4-5
Open
P24D
1-2
Open
1-2
Open
1-2,3-4
4-5
2-3
AMD CPU
Junper
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP24
DX4/100 (V8B)
DX4/120 (V8B)
1-2
2-3
2-3
Open
1-2,3-4
1-2,3-4
1-2
Open
1-2
Open
1-2,3-4
4-5
2-3
x5-133
x5-160
1-2
2-3
2-3
Open
1-2,3-4
1-2,3-4
1-2
2-3
1-2
Open
1-2,3-4
4-5
2-3
Cyrix CPU
Junper
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP24
DX, DX/2
DX4 (5v)
2-3
2-3
1-2
2-3
2-3
2-3
Open
Open
Open
Open
1-2,3-4
2-3
Open
DX, DX/2
DX4 (3.45v)
2-3
2-3
1-2
2-3
2-3
2-3,4-5
Open
Open
Open
Open
1-2,3-4
2-3
Open
5x86-100
5x86-120
2-3
2-3
2-3
Open
1-2,3-4
1-2,3-4
1-2
Open
1-2
Open
1-2,3-4
4-5
2-3
5x86-133
2-3
2-3
2-3
Open
1-2,3-4
1-2,3-4
1-2
2-3
1-2
Open
1-2,3-4
4-5
2-3
CPU Voltage
9 o’clock of CPU. If no JP48, board is 5v only.
Voltage
JP42
JP43
JP44
3.3
Short
Open
Open
3.45
Open
Short
Open
3.6
Open
Open
Short
3.75
Open
Open
Open
3.9
Open
Open
Open
5
Open
Open
Open
JP45
Open
Open
Open
Short
Open
Open
System Speed
11 o’clock of CPU
Speed
25 MHz
33 MHz
40 MHz
JP25
1-2
1-2
1-2
JP38
Open
Short
Short
JP39
Open
Short
Open
JP40
Open
Open
Open
JP46
Open
Open
Open
Open
Short
Open
JP48
Open
Open
Open
Open
Open
1-2,3-4 Sh
327
328
The PC Engineer’s Reference Book – Vol 2: Motherboards
Speed
50 MHz
JP25
2-3
JP38
Open
JP39
Short
JP40
Open
R526
Item
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium
SiS 551X
Award 4.50pg or AMI
3 PCI/4 ISA
128
256
Notes
Socket 7
30- or 72-pin sockets
Pipelined burst. 1 Mb standard SRAM
Up to Mode 4 IDE.
R527
Item
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium
SiS
Award 4.50pg or AMI
3 PCI/4 ISA
128
256
Notes
Socket 7
30- or 72-pin sockets
Pipelined burst. 1 Mb standard SRAM
Up to Mode 4 IDE.
R528
Item
Form Factor
CPU
Chipset
Description
Notes
Pentium
Intel 82430HX
Socket 7
Description
Notes
Pentium
Intel 82430VX
Socket 7
R529
Item
Form Factor
CPU
Chipset
R 533
Intel 82430VX chipset – settings below not complete!
Switch
JP3-5
JP19-21
Position
JP3
Open
JP19
Open
Open
Close
Close
JP4
Close
JP20
Open
Close
Close
Close
JP5
Open
JP21
Open
Open
Open
Open
Function
Host bus speed
66 MHz
CPU multiplier
3.5x
3x
2.5x
2x
R 534
Mustang, with SiS 5571 chipset – settings below not complete!
Switch
JP10-12
JP18,19
Position
JP10
Close
Open
JP18
Open
Open
JP11
Close
Open
JP19
Open
Close
JP12
Open
Open
Function
Host bus speed
66 MHz
75 MHz
CPU multiplier
3.5x
3x
M
Switch
Position
Close
Close
Close
Open
1-2,3-4 close
1-2 close
1-2,3-4 open
1-2,3-4 close
1-2 close
1-2,3-4 open
JP26
JP27
Function
2.5x
2x
2.4v core CPU voltage
2.7v
2.8v
3.3v CPU I/O voltage
3.45v
3.5v
R 534F/G
Mustang, with SiS 5571 chipset – settings below not complete! See 534 for voltage?
Switch
JP10-12
Position
JP9
Open
Close
JP18
Open
Open
Close
Close
JP18,19
JP10
Open
Close
JP19
Open
Close
Close
Open
JP11
Close
Open
JP12
Close
Open
Function
Host bus speed
66 MHz
75 MHz
CPU multiplier
3.5x
3x
2.5x
2x
R 540
Mustang, with Intel 430TX chipset
Switch
SW2
1-3
SW2
4-6
JP8-9
Position
1
Off
On
On
Off
Off
On
On
4
On
On
Off
Off
JP8
Open
Open
2
Off
Off
On
On
Off
Off
On
5
On
Off
Off
On
JP9
Open
Close
3
On
Off
Off
Off
Off
On
On
6
Off
Off
Off
Off
Function
Multiplier
1.5x
2x
2.5x
3x
3.5x
4x
4.5x
Host bus
55 MHz
60 MHz
66 MHz
75 MHz
Host bus speed
66 MHz
75 MHz
R543
Mustang GX
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
I/O
Video
Audio
Description
AT
Cyrix GX86
120/133/150
Cyrix Cx5510
2 PCI/3 ISA
8-128 Mb
2S, 1P, Floppy, 2 IDE, PS/2
Onboard
Soundblaster compatible
Notes
4 layer
FPM/EDO. 4 72-pin SIMMs.
Optional soundcard
329
330
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP1
Position
1-2
2-3
Function
Normal
Clear CMOS
JP49
R 557
MIG, with Intel 430TX chipset
Jumper
JP1-3
JP7
JP8-9
Position
JP1
JP2
Open
Close
Open
Close
Open
Open
1-2,3-4,5-6 open
JP8
JP9
Open
Open
Open
Close
JP3
Close
Open
Open
Function
Multiplier
2.5x
3x
3.5x
Split Rail CPU
Host bus speed
66 MHz
75 MHz
R 581A
Mustang-AGP. SIS 5591/5595 chipset
Jumper
JP1-3
JP8-10
Position
JP1
1-2
2-3
1-2
2-3
1-2
2-3
JP8
Open
Close
Close
Open
Open
Close
Close
Open
JP2
1-2
1-2
2-3
2-3
2-3
2-3
JP9
Open
Open
Close
Close
Open
Open
Close
Close
JP3
2-3
2-3
1-2
1-2
2-3
2-3
JP10
Open
Open
Open
Open
Open
Close
Close
Close
Function
Host
83.3
75
75
68.5
66.7
60
Multiplier
1.5x
2x
2.5x
3x
3.5x
4x
4.5x
5x
AGP
64
64
75
68.5
66.7
60
PCI
32
32
37.5
34.3
33.4
30
MTI
See M-Technology
www.mtiusa.com
Mustek
(510) 475 5730
Mycomp
Taiwan Mycomp Corp. www.mtl.mynix.com. See Mynix Technology or TMC
Award BIOS ID
The last two numbers of the BIOS part number.
M
Code
9C-00
Motherboard
AI5TV
Code
331
Motherboard
Mylex
www.mylex.com
Northgate/Mylex 80486 EISA motherboard with BIOS version 6.04q is not compatible with emm386.exe.
The newest revision is 6.15, which is compatible.
Award BIOS ID
The last two numbers of the BIOS part number.
Code
2-B3
Motherboard
MPXS486
Code
Motherboard
MAE 486
Jumper
J1
J2
Position
In*
Out
1-2*
2-3
Function
Cache enabled
Disabled
33 MHz CPU
25 MHz CPU
Reserved
J15
J16
Memory
1 Mb
2 Mb
4 Mb
8 Mb
16 Mb
32 Mb
J3
Out
1-2
Out
1-2
Out
1-2
J4
Out
1-2
Out
1-2
Out
1-2
Reserved
J5
Out
1-2
Out
1-2
Out
1-2
J6
Out
1-2
Out
1-2
Out
1-2
J7
Out
Out
Out
Out
2-3
1-2
J8
2-3
1-2
1-2
1-2
1-2
1-2
J9
Out
Out
2-3
1-2
1-2
1-2
J10
1-2
1-2
1-2
2-3
2-3
2-3
J11
1-2
1-2
1-2
1-2
1-2
2-3
J12
1-2
2-3
2-3
2-3
2-3
2-3
MDE 486
Jumper
JP1
JP7,11-13
JP8-10
JP14-17
JP18
JP19
JP20
Position
Out
In*
JP7
Out
In
JP8
Out
2-3
1-2
JP14
2-3
2-3
2-3
1-2
Out*
In
1-2
2-3*
1-2*
2-3
JP11
Out
In
JP9
2-3
1-2
1-2
JP15
1-2
2-3
1-2
2-3
JP12
Out
In
JP10
Out
In
In
JP16
2-3
1-2
1-2
1-2
JP13
Out
In
JP17
1-2
2-3
2-3
2-3
Function
Mono display
Colour display
Cache memory
64K*
256K
CPU
486SX
487SX
486DX
CPU Speed
20 MHz
25 MHz
33 MHz
50 MHz (not MSI 486)
AT CLK (ISA Bus Clock)
AT CLK (ISA Bus Clock) 50 MHz (not MSI 486)
LPT2 IRQ5
LPT1 IRQ7
Enable all I/O ports
Disable
332
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP21
Position
1-2
2-3*
Out
Function
Reset CMOS
Internal battery
External battery
MDI 486
As for MDE 486
MNE 486
Jumper
J1
J2
J13
J15
J16
J20
J17
J18
J19
Memory
1 Mb
2 Mb
4 Mb
8 Mb
16 Mb
32 Mb
Position
Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
COM1 IRQ4
COM2 IRQ3
LPT1 IRQ5
LPT2 IRQ7
Enable I/O subsystem
Disable
1-2
2-3
1-2
2-3
1-2
2-3
J3
Out
1-2
Out
1-2
Out
1-2
J4
Out
1-2
Out
1-2
Out
1-2
J5
Out
1-2
Out
1-2
Out
1-2
J6
Out
1-2
Out
1-2
Out
1-2
MPXS486
Possibly Chaintech
MSI 486
As for MDE 486
MTI 386
Jumper
JP1
JP2
JP4
JP5
Position
1-2*
2-3
2-3
1-2*
1-2
2-3*
Function
Colour display
Mono
2nd port is LPT1
Enable I/O peripherals
32Kx8 SRAM
32K/64K cache
Position
2-3
1-2*
2-3
1-2*
2-3
Function
LPT1 IRQ5
Colour display
Mono
Enable I/O peripherals
Disable
MTX 386
Jumper
JP1
JP2
JP3
J7
Out
Out
Out
Out
2-3
1-2
J8
2-3
1-2
1-2
1-2
1-2
1-2
J9
Out
Out
2-3
1-2
1-2
1-2
J10
1-2
1-2
1-2
2-3
2-3
2-3
J11
1-2
1-2
1-2
1-2
1-2
2-3
J12
1-2
2-3
2-3
2-3
2-3
2-3
M
MWS 386
Jumper
SW1
SW2-4
SW4
SW5
SW6
SW7
SW8
J25
J26
Position
On
Off
SW2
SW3
Off
On
Off
Off
Off
On
On
Off
On
Off
On
Off
On
On
Off
On
Off
Bus speed? (MHz)
1-2
2-3
3-4
4-5*
1-2
2-3*
SW4
On
On
Off
Off
Function
32-bit memory card in Slot 8
Not installed
Total Memory
1 Mb
2 Mb
4 Mb
8 Mb
256K DRAMs
1 Mb DRAMs
EGA BIOS at C000
EGA BIOS at E000
No 80387
System boots at 8 MHz
System boots at 16,20,25 MHz
BIOS uses colour display at POST
BIOS uses mono display at POST
386/16
386/20
386/25
5.33
6.67
8.33
4
5
6.25
4
5
6.25
4
10
12.5
128K EPROM
256K EPROM
MXA 386
Jumper
S1-3
S4
S5
S6
S7
S8
S9
S10
Position
S1
Off
On
Off
On
Off
On
On
Off*
On*
Off
On
Off*
On
Off*
On*
Off
On
Off*
On*
Off
S2
On
On
Off
Off
On
On
J1-4
S3
Off
Off
On
On
On
On
Function
Total Memory
1 Mb
2 Mb
4 Mb
8 Mb
16 Mb
32 Mb
No cache 0C0000-0CFFFF
Cache 0C0000-0CFFFF enabled
No cache 0D0000-0DFFFF
Cache 0D0000-0DFFFF enabled
No cache 0E0000-0FFFFF
Cache 0E0000-0FFFFF enabled
No ISA bus memory
ISA bus memory
No 80387
80387 installed
Colour display
Mono display
Cache enabled
Disabled
Reserved
MXS 386
Jumper
SW1
S1-2
Position
S1
Off
Off
S2
Off
On
Function
Memory
100 ns FPM 4 page active
100 ns FPM 1 page active
333
334
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
SW3
S1
S2
S3
S4
S5
S6
J6
J8
J10
Position
On
On
Off
On*
Off
On*
Off*
On
Off*
On
Off
On
Off
On
1-2
2-3*
Out*
In
1-2
2-3
Mynix
www.mtl.mynix.com
Off
On
Function
100ns non-FPM
120ns non-FPM
Disable serial port
Enable
Disable parallel port
Enable
Serial port is COM1
Serial port is COM2
Parallel port is LPT1
Parallel port is LPT2
IRQ3 disabled
IRQ3 enabled
IRQ4 disabled
IRQ4 enabled
512K EPROM
256K EPROM
Mono display
Colour display
LPT1 IRQ7
LPT2 IRQ5
N
NEC
APC IV 286
Jumper
22H1
S1, 6-7
S2 5-8,4-9
S3 3-10,2-11
S4, 1-12
S5 (18K2)
S6 (5N2)
Position
In
Out
4-9,3-10
4-9,2-11
5-8,3-10
In
Out
1-4
2-3
None
3-6,4-5
1-8,2-7
S7 (6N1)
S10(14D)
S8(4N1)
S9(10)
S11A
S11B
P10
2-3,1-8
4-5,3-6
1,2,3,8,9
4
5
6
7
3-2
2-1
On
Off
1
8
Off
1-2
1-3
1-4
Function
Determines RAS and ALE signals earlier.
Normal
8-bit I/O, 4 waits
3 wait I/O cycle for device at 000-0FF
2 wait I/O cycle for device at 000-0FF
No wait memory cycle
1 wait (normal)
256Kx1 in Bank 0 (512K)
256Kx1 in Bank 0, 64Kx1 in Bank 1 (640K)
256Kx1 in Bank 0, 256Kx1 in Bank 1 (1 Mb)
0E(FE) – Reserved on I/O channel
0F(FF) – Location 7K, 7M enable
0E(0F) - Location 7K, 7M enable
0F(FF) – Compatible ROM enable
27128
27256
Reserved
Enable Parallel
Enable serial CH1
Enable serial CH2
Ch1=COM1, CH2=COM2 (Off=reversed)
EPROM ROM Type
MASK ROM Type
Colour display
Mono
RS232 receive enable
RS232 transmit enable
Reserved
16 MHz CPU
11.7647 MHz CPU
20 MHz CPU
336
The PC Engineer’s Reference Book – Vol 2: Motherboards
PM1 286
Jumper
22J2
15K2
14G1
2G1
20D1
Position
Out
In
2-3
1-4
None
1-2
2-3
1-2
2-3
2-3
1-2
Function
ALE and RAS asserted normally
Early
256Kx1 in Bank 0 (512K)
256Kx1 in Bank 0, 64Kx1 in Bank 1 (640K)
256Kx1 in Bank 0, 256Kx1 in Bank 1 (1 Mb)
EPROM
MASK ROM
27256
27128
Normal floppy
Special floppy
SW14A
Switch
S1
S2
S3
S4
S5
S6
S7
S8
Position
On
On
On
On
On
On
Off*
On
Off
Function
Reserved
Enable LPT1
Enable COM1
Enable COM2
Reserved
Enable floppy
Secondary floppy controller I/O address
Primary floppy controller I/O address
Colour display
Mono
Position
S1
Off
On
On
S2
On
On
Off
SW14B
Switch
S1-3
S4
S5
S6
On
On
Off
S3
On
On
On
Function
System ID
APC IV Power mate 1
APC IV/APC IV E
APC IV Power Mate 2
Reserved
Reserved – test Mode
IBM Compatible ROM
Not used (selects APC Mode ROM)
PM 286+
Switch 1
Switch
1
2
3
4
5
6
7
8
9
10
Position
On
Off
On
On
On
Off
On
On
On
Off*
On
Off
Off
On
Function
8 MHz 80287
10 MHz 80287
Enable video
Enable COM1
Serial port COM1 3F8h
Serial port COM2 2F8h
Enable LPT1
Enable floppy
Primary floppy controller I/O address
Secondary floppy controller I/O address
Colour display
Mono
Reserved
Enable Mouse
N
Jumper
S1
Position
1-2
2-3
1-2
2-3
S3
2-3
1-2
1-2
2-3
1-2
2-3
Out
S8
1-2
2-3
S2
S3,5
S4
S6
S7
S8,9
S5
2-3
1-2
S9
1-2
2-3
Function
Serial port IRQ3
Serial port IRQ4
Enable power-on password
Disable
ROM Type
27C256
27C512
512K base memory
640K base memory
Standard display
Extended mode with additional oscillator
Reserved
RTC
MC146818
DS1287
PM1 286+
Jumper
20H2
12J2
12J3
Position
1-2
2-3
1-2
2-3
1-2
2-3
Function
500/250/300/150/125 Kbps floppy transfer rate
500/250/125 Kbps
27128
27256
MASK ROM
EPROM
SW16C1
Switch
1
2
3
4
5
6
7
8
Position
On
Off
On
On
On
Off
On
On
Off*
On
Off
Function
8 MHz clock
12 MHz clock
Enable LPT1
Enable COM1
Enable COM2
Reserved
Enable floppy
Secondary floppy controller I/O address
Disable system board floppy
Colour display
Mono
SW16B2
Jumper
S1
S2
S3
S4
S5
S6
Position
Off
On
Off
On
On
Off
On
Function
Reserved
Reserved
Reserved
Reserved
Test mode off
Test mode on
Reserved
Position
1-2
2-3
Function
CPU address pipeline mode
CPU address non-pipeline mode
PM 386
Jumper
14L2
337
338
The PC Engineer’s Reference Book – Vol 2: Motherboards
SW1
Switch
01-3
04
05
06
Position
01
On
Off
On
Off
On
Off
02
On
03
Off
Function
Unit ID
Default
Reserved
Test mode off
Test mode on
0 wait state
1 wait state
SW2
Switch
01
02
03
04
05
06
07
08
09
10
Position
On
Off
On
Off
On
On
On
On
On
On
Off
Off
Off
Function
Colour display
Mono
Floppy secondary address
Floppy Primary address
Enable floppy
Enable COM2
Enable COM1
Enable LPT1
Enable maths coprocessor
80387
80287
Reserved
Reserved
PM1 386/33e
Jumper
2N1
12C3
12C2
10B1
16F1
13G1
10H1
9M1
3E1
16C2
16C3
16C4
Position
In
Out
In
Out
In
Out
1-2
2-3
In
Function
Test Mode on
Test Mode off
Enable pipeline mode
Disable pipeline mode
385 reserve 1 pin is tied low
385 reserve 1 pin is tied high
385 READY output to CPU delayed till end of posted write cycle on 385 local bus
385 READY output to CPU transparent to CPU
Insert 3 BCLK (16-bit cycles) or 11 BCLK (8-bit cycles) between back-back ISA I/O cycles from the CPU for I/O recovery time.
Insert 1 BCLK between back-back ISA 8/16-bit I/O cycles from the CPU for I/O recovery time.
Out
1-2
2-3
1-2
In
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
25 MHz CPU speed
33 MHz CPU speed
Enable password
Enable manufacturing switch
500/250/300/150/125 Kbps floppy transfer rate
500/250/125 Kbps
MMRTO input tied low
MMRTO input tied high
MMRT1 input tied low
MMRT1 input tied high
MMWT input tied low
MMWT input tied high
Position
On
On
On
On
Function
Enable LPT1
Enable COM1
Enable COM2
Enable floppy
SW1
Switch
S1
S2
S3
S4
N
Switch
S5
S6
S7
S8
S9
S10
Position
On
Off
On
On
Off*
On
On
Off
On
Function
Select second drive B
First drive A
Enable 80387
Base memory 0-512K
Base memory 0-640K
Enable PS/2 mouse
Colour display
Mono
Reserved
PM 386sx
SW115G
Switch
1
2
3
4
5
6
7
8
9
10
Switch
S1
S2
S3
S4
S5
S6
S7
11L2
Position
On
Off
On
Off
On
On
Off
On
On
On
On
On
Off
On
Function
Colour display
Mono
First diskette A
First diskette B
Enable diskette controller
Serial port is COM1
Serial port is COM2
Enable serial port
Enable LPT1
Enable maths coprocessor
Enable integrated VGA
0-512K
0-640K
Enable PS/2 mouse
Position
1-2
2-3
1-2
1-2
2-3
In
Out
1-2
2-3
1-2
2-3
Out
In
Function
Non-pipeline mode
Pipeline mode
Enable security lock
Serial port has COM1 IRQ
Serial port has COM2 IRQ
Enable reset
Reserved
RTC battery backup
RTC backup Vcc 5v
Power good MC 146818
Power good DS 1287
Test mode off
Test mode on
PM 386sx 16i
SW1
Switch
S1
S2
S3
S4
Position
On
On
On
On
Function
Disable onboard video
Disable floppy
Disable password
Prevent password reprogramming
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340
The PC Engineer’s Reference Book – Vol 2: Motherboards
SW2
Switch
Position
Out
Function
Test mode off
PM 386sx 20
SW14F
Switch
1
2
3
4
5
6
7
8
9
10
Jumper
J1
J2
J3
J5
J7
J8
10K2
Position
On
Off
On
Off
On
On
Off
On
On
On
On
On
Off
On
Position
1-2
2-3
1-2
2-3
1-2
2-3
Out
1-2
2-3
1-2
Out
In
Function
Colour display
Mono
First diskette A
First diskette B
Enable diskette controller
Serial port is COM1
Serial port is COM2
Enable serial port
Enable LPT1
Enable KB controller D1 command intercept
Enable integrated VGA
0-512K
0-640K
Enable PS/2 mouse
Function
Disable password
Enable
Enable IDE
Disable
Serial port has COM2 IRQ
Serial port has COM1 IRQ
Reserved
27C512 ROM BIOS
27C256 ROM BIOS
Disable VGA
Test mode off
Test mode on
PM 386sx 20vi
As for PM386 16I
PM 386sx 33i
As for PM386 16I except:
Switch
JP7
Position
1-2
2-3
Function
LPT1 IRQ5
LPT1 IRQ7
PM 486-20e
Jumper
3F1
11B5
15A1
15C3
15K1
Position
1-2
Out
Out
1-2,5-6
2-3,4-5
Out
Function
Disable password
Disable I/O recovery
VGA adapter not installed
LPT1=IRQ7, LPT2 IRQ5
LPT1=IRQ5, LPT2 IRQ7
Disable manufacturing loop jumper
N
Jumper
17H1
18F1
10A1
15A2
15A3
Position
1-2
1-2
2-3
Out
In
1-2
2-3
1-2
2-3
Function
Enable write data to Flash ROM
27C256 (28F256) BIOS ROM
27C512 (28F512) BIOS ROM
Test mode off
Test mode on
Processor board normal operation
Test mode
Normal operation
Test mode
PM 486-33e
As for PM 486-20e
PM 486-50e
As for PM 486-20e
PM 486sx 25i
As for PM386 16I except:
Switch
JP7
JP9
Position
1-2
2-3
1-2
2-3
Function
LPT1 IRQ5
LPT1 IRQ7
SX/DX2
DX
PM 486DX 33i
As for PM 486sx 25i
PM 486DX 50i
As for PM 486sx 25i
NewStar Engineering
www.computersources.com.hk//newstar
Newtech International
SMT boards?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
BC-00
Motherboard
P55VX3
Nexcom
Niagara SMD
www.niagaratech.com
Code
Motherboard
341
342
The PC Engineer’s Reference Book – Vol 2: Motherboards
NMC Peripherals Europe
www.nmc-pe.de
Novell
286A
Jumper
J3,8
J4
J5
J6
J7
J11-14
J33
J38
J39
Position
J3
In
In
In
In
Out
J11
In
Out
In
Out
1-2
2-3
1-2
2-3
Function
J8
J12
Out
In
J13
In
Out
J14
Out
In
SW1
Switch
S1
S2
S3
Position
On
Off
M
C
Function
No wait state
Wait state
Reset
Mono display
Colour
Position
On
Off
On
On
On
Off
On
Off
On
Off
On
Off
On
Off
In
In
Function
256K RAM chips
64K RAM chips
Enable 512-640K
Memory Bank 2 enabled
PC compatible keyboard
AT compatible keyboard
Serial port is console monitor
Keyboard/monitor as console
Serial port is COM1
Serial port is COM3
Parallel port is LPT2
Parallel port is LPT4
Colour display
Mono
Reserved
Reserved
286B
SW1
Switch
S1
S2
S3
S4
S5
S6
S7
S8
E2
J32
Enables SW1-1 (Wait/No wait)
Disables SW1-1 (Wait only)
Enable LPT1
Enable COM1
Enable COM2
64K RAM
256K RAM
Boot ROM size
64K
256K
6 MHz CPU
8 MHz CPU
Ignore power good
Enable power good
External battery
internal battery
N
386A
SW1
Jumper
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
Switch
W3
W4
W8
W12
J13
J14
Position
On
On
On
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Position
2-3
2-3
Function
COM1 disabled
COM2 disabled
Parallel port disabled
Parallel port is LPT2
Parallel port is LPT1
COM1 IRQ4 (S6 & 7 off)
Deselect
COM1 IRQ3 (S5 & 8 off)
Deselect
COM2 IRQ4 (S5 & 8 off)
Deselect
COM2 IRQ3 (S6 & 7 off)
Deselect
Parallel port IRQ7 (S10 off)
Deselect
Parallel port IRQ5 (S9 off)
Deselect
Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
NTC Technologies
See Ozzo
343
344
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
O
Ocean
Ocean Office Automation. www.ocean-usa.com/ocean. See Octek
Octek
Ocean Office Automation. www.oceanhk.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0-00
1-00
9C
9C
Motherboard
Bison VI PCI
Hippo 12 VIP
Rhino 6
Rhino 9
Code
9C-00
AC-00
DC
Motherboard
Rhino 15
Rhino 12+
Rhino 6VX
Olivetti
CP 486
JP1
Disable system password
M21
SW Bank 0
Switch
1-4
Position
1
Off
On
Off
On
Off
On
Off
Off
2
On
Off
Off
On
On
On
On
On
3
On
On
On
Off
Off
On
On
Off
4
On
On
On
On
On
Off
Off
Off
Function
Memory
128K
256K
384/256K on m'b + 128K exp
512/256K on m'b + 256K exp
640/256K on m'b + 384K exp
512k in bank 0
640/512K in bk 0 + 128K bk 1
640/128K in bk 0 + 512K bk 1
346
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
5
6
7
8
Position
Off
Off
Function
Coprocessor installed
8250 ACE asynchronous installed
Reserved
RAM Bank 0
RAM Bank 0 & 1
On
Off
SW Bank 1
Jumper
1
2
3
4
5,6
7,8
Position
On
On
Off
On
Off
On
Off
5
Off
Off
On
On
7
On
Off
6
Off
On
Off
On
8
On
On
Function
360K floppies Off=720K floppies
800ns startup speed
250ns startup speed
HDU ROM code on motherboard
HDU ROM code on controller
Scroll display
Slow scroll video
Video adapter
Mono 80x25
CGA 40 x 25
CGA 80 x 25
EGA (1.43 BIOS only)
Floppies
1 drive
2 drives
M24
SW Bank 0
Switch
1-4
4
5
6
7
8
Position
1
Off
On
Off
On
On
Off
Off
Off
Off
Off
Off
2
On
Off
Off
On
On
On
On
On
3
On
On
On
On
Off
Off
On
Off
On
Off
4
On
On
On
Off
On
On
Off
Off
Function
Memory
128K/64K DRAMs
256K/64K DRAMs
384/256K on m'b + 128K exp
512K in bk 0 on m'b
512/256K on m'b + 256K exp
640/256K on m'b + 384K exp
640/512K in bk 0 + 128K bk 1
640/128K in bk 0 + 512K bk 1
256K DRAMs used
8087 installed
8250 ACE asynchronous installed
Reserved
2732 EPROM
2764 EPROM
SW Bank 1
Jumper
1
2
3
4
5,6
7,8
Position
On
Off
On
On
Off
On
Off
5
Off
Off
On
7 On
7 Off
6
Off
On
Off
8 On
8 On
Function
48 tpi floppies (320K)
96 tpi floppies (1.2 Mb)
Slow start up for MFD (Off=Fast)
HDU ROM code on motherboard
HDU ROM code on controller
Standard display controller
Non-standard display controller
Video adapter
Mono
CGA 40 x 25
CGA 80 x 25
1 floppy
2 drives
O
Jumper
B
G
H
Position
1-2
2-3
Out
1
2
Function
8 MHz floppy controller
4 MHz floppy controller
Enable floppy controller
8 MHz 8087
10 MHz 8087
M24SP
As for M21, except:
Jumper
B
C,E
G
H
Position
1-2
2-3
In
Out
Out
1
2
Function
8 MHz floppy controller
4 MHz floppy controller
Production Test
Normal
Enable floppy controller
8 MHz 8087
10 MHz 8087
M240
SW A
Jumper
S1,2
S3
S4,5
S6,7
8
Position
S1
On
On
Off
Off
On
S4
On
Off
On
Off
S6
On
Off
On
Off
On
Off
S2
On
Off
On
Off
S5
On
On
Off
Off
S7
On
On
Off
Off
Function
Memory size
Disabled
256K
512K
640K
EGC present
Mini floppies
1
2
3
4
Display type
EGA, INS or CRT not there
Colour 40x25
Colour 80x25
Mono
No coprocessor
Coprocessor installed
SW B
Jumper
1
2
3
4
5
6
7
Position
On
Off
On
Off
On
Off
On
On
Off
On
Off
On
Function
720K floppy
1.44 Mb floppy
5.25" floppy as A
3.5" floppy as A
5.25" floppy as B
3.5" floppy as B
Floppy enabled
BIOS HD on system
BIOS HD on controller or no HD
OGC controller installed
Other video (CGA etc)
Serial enabled
347
348
Jumper
8
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
On
1-2
2-3
Out
In
Out
Out
In
Out
In
Function
Parallel enabled
360K floppy disk change signal enabled
720K, 1.2, 1.44 Mb floppy disk change signal enabled
Factory testing only
Calibration of system board disk drive
Factory testing only
Factory testing only
Normal operations
Disable BIOS
Reserved
M28
Jumper
JU1
JU2
JU3
JU4,5
JU6-8
Position
1-16
2-15
3-14
4-13
5-12
6-11
7-10
1-16,4-13
2-15,3-14
5-12
6-11
5-12,6-11
1-8
2-7
3-6
4-5
JU4
In
Out
JU6
In
Out
Out
Function
512K on system board
2764/27128 User EPROM
27256 User EPROM
27128 BIOS EPROM
27256 BIOS EPROM
Enable parallel port
Disable serial port
5.33 MHz coprocessor
8 MHz coprocessor
Video adapter only
Video adapter + EGC
External video adapter
Reserved
Colour display (Out=mono)
Reserved
Reserved
JU5
In
Out
JU7
Out
In
In
JU8
Out
Out
In
Production
Test
CPU Wait State
4
5
6
M280
Jumper
JU1
JU2
JU3-1
2
3
Position
1-16
2-15
3-14
4-13
5-12
6-11
7-10
8-9
1,2,3,4
5-6
7
8
Out
In
Out
In
Out
In
Function
512K on system board
2764/27128 User EPROM
27256 User EPROM
27128 BIOS EPROM
27256 BIOS EPROM
Enable parallel port
Disable serial port
Reserved – always out
12 MHz 80287 (Out for 8 MHz)
Flicker matrix video (Out=Dual port PGC or OEC video)
External system clock (Out=24 MHz)
80287 3 wait state (Out=10)
Disable burn-in
Enable
Mono display
Colour
32 MHz clock disconnected
Connected
O
Jumper
4
JU4
Position
Out
Out
In
Out
In
Out
In
Out
In
In
Out
In
Out
In
JU5
JU6
JU7
JU8
JU9
JU10,11,12
Function
Reserved
14 MHz clock disconnected
Connected
1.8 MHz clock disconnected
Connected
8 MHz system clock
12 MHz system clock
12 MHz system clock
8 MHz system clock
MC146818 and RAM
MC146818 clock
Non-volatile RAM
8 MHz 80287
12 MHz 80287
M290
Processor board
One version
Jumper
S1,2
S3
S4
P1
P2
P3
Position
S1
On
On
Off
Off
On
Off*
On
Off
1-2
2-3
Off
Off
S2
On
Off
On
Off
Function
Memory
512K
1 Mb
2 Mb
2 Mb + 256K
OEC/OVC adapter
PGC/other adapter
Burn-in
Normal
256-512K RAM module
1 Mb RAM module
Reserved
Reserved
Another version
Jumper
1
2
3
4
5
6
Position
On
Off*
On*
Off
On*
On
Off*
On
Off*
Off*
Function
OEC is secondary video controller
OEC is primary video controller
Colour
Mono
Reserved – leave On
CGA emulation primary mode
EGA emulation primary mode
CGA mode only
EGA/CGA mode
Reserved – leave Off
Position
P1
In
Out
In
Out
1-2
P2
Out
Out
In
In
M250
Jumper
P1,2
P6
Function
SIMM type
256x9, 512x9 (Bank 0)
256x9, 512x9 (Bank 0&1)
1 Mbx9 (Bank 0)
Reserved
40 Mb HD
349
350
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
P8
Position
2-3
In*
Out
Function
20 Mb HD
Battery connected
Not connected
M250E
Jumper
P1,2
P6
P8
P9
P10
P11
P12
P15
P20
Position
P1
1-2
2-3
3-4
1-2
2-3
In
Out
In
Out
In
In
1-2
2-3
In
Out
In
Out
Function
SIMM type
1 Mb, no SIMM
2 Mb, 2 512K SIMM
4 Mb, 2 512K SIMM + 2 1 Mb
1:1 HD interleave
1:3 HD interleave
Battery connected
Not connected
16 MHz floppy
1.2 Mb floppy
HD not installed
Disable serial port
Enable VGA
Disable
Selectable hysteresis
Normal hysteresis
187ns precomp
125ns precomp
P2
1-2
2-3
3-4
M300
Processor board
Jumper
JP1,2
JP3
JP5
JP6
JP4,7-8,10
JP9
JP11
Position
JP1
In
In
Out
Out
In
Out
In
Out
1-2
2-3
All 1-2
All 2-3
In
Out
In
Out
Function
JP2
Out
In
Out
In
100ns DRAM
120ns DRAM
100ns FPM, 4 DRAM pages active
100ns FPM, 1 DRAM page active
Normal
Reserved
Normal
Reserved
A20GATE signal activated through keyboard controller
A20GATE signal activated in fast mode (through chipset)
For 82335B
For 82335A
Video adapters, BIOS on board
Video adapters, no BIOS on board
Enable IRQ12 for mouse
Disable
M380T
Jumper
W010
A05BB
W1131
K0539
W07FD
W07FQ
Position
In
In
In
In
In
Out
In
Out
Function
14 MHz clock
32 MHz clock
24 MHz clock
1.8 MHz clock
Test burn-in mode
Normal operation
PGC or OEC video controller
Others
O
Jumper
F01LQ
Z12LU
Position
In
Out
1-2,5-6
Function
80387 uses external oscillator on system board F01L3
Uses system oscillator
Normal floppy operation
M380/XP1
As for M380T
M380/XP3
As for M380T
M380/XP4
As for M380T
M380/XP5
Jumper
JPR1,2
JPR4
JP1,2
JP3,4
JP5
JP6
JP7
JP8
JP9,10
JP11,12
Position
JPR1
1-2
2-3
2-3
1-2
None
JP1
In
Out
In
Out
JP3
In
Out
In
Out
In
In
Out
In
Out
In
Out
JP9
In
Out
JP11
Out
In
JPR2
2-3
1-2
JP2
In
In
Out
Out
JP4
In
In
Out
Out
JP10
Out
In
JP12
Out
In
M380/XP7
As for M380/XP5
M380/XP9
As for M380/XP5, except:
Function
82385 clock
25 MHz
33 MHz
Enable 12-16 Mb RAM as cache
12-16 Mb RAM managed by I/O controller
Disabled
Processor speed
16 or 20 MHz
25 MHz (not used)
33 MHz
40 MHz (not used)
Bank (memory type)
0 (1 Mbx9 – 4 Mb)
0 & 1 (Mbx9 – 8 Mb)
0 (16 Mbx9 – 16 Mb)
0 & 1 (4 Mbx9 – 32 Mb)
Enable system board RAM
Enable coprocessor clock
System clock
386 pipeline operating mode
Non-pipeline
System serial port clock
External serial port clock
EPROM
256K
512K
Compatibility
Compaq
IBM
351
352
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JPR3
Position
2-3
1-2
None
Function
Enable IRQ12 for mouse
I/O disabled/enabled
Disabled
M486 ESDI
Jumper
JP1
Position
Function
Disable system password
M486 SCSI
Jumper
JP1
Position
Function
Disable system password
Position
In
Out
JP2
1-2
2-3
1-2
2-3
In
Function
1 memory bank
2 memory banks
P500 P4.1
Jumper
JP01
JP2,3
JP5
JP10
JP3
1-2
2-3
Enable RAS 0 (Bank 0)
Enable RAS 1 (Banks 0&1)
1Mb SIMMs
256K SIMMs
Disable power-up password
P500 P5
As for P500 P4.1
P750
Jumper
J3
Position
In
Out
Function
Disable system password, restore default configuration
Normal
Opti
3486L
Jumper
P4
P12-14
P25,33,100
P28
P30-32,P97
Position
1-2
2-3
P12
1-2
2-3
1-2
P25
1-2
2-3
On
Off
P30
Off
On
On
Off
Off
On
P13
1-2
Open
2-3
P33
Close
Open
P14
Close
Close
Close
P100
2-3
1-2
P31
On
Off
On
Off
On
Off
P32
On
On
Off
On
On
On
P97
Off
Off
Off
Off
On
On
Function
Double phase clock, 386 mode
Single phase clock, 486 mode
CPU
486DX-25/33/50, DX2
486SX-20/25
487SX-20/25
CPU Type
486 mode
386 mode
Cyrix CX486DLC-33/40
Intel 386DX-33, AMD386DX-40
Frequency (MHz) if AV9107-03 clock chip is in U09.
20
25
33.33
40
40
50
O
Jumper
Position
On
Off
On
Off
P39
On
Off
Off
On
On
On
Function
66.66
80
33 MHz 386
40 MHz 386
486 speed is set in BIOS (CLK/6, etc)
Z386S
Jumper
JP1
JP2
S1
Position
1-2
2-3
Open
Close
Open
Close
S2
Function
Discharge CMOS
Normal
Colour
Mono
Turbo (JP3 is LED)
Normal
Reset
Opus
PC IV 286
Jumper
W11
W12
W14
W15,16
W17,18
W13,19,
20
W21
W22
W23
W24
W25
J9
Position
2-3
1-2
In
W15
In
Out
Out
In
W17
In
Out
Out
In
W13
1-2
2-3
In
In
Out
In
1-2
2-3
1-2
2-3
W16
In
Out
In
Out
W18
In
Out
In
Out
W19
In
Out
Out
In
W20
In
Out
In
Out
Function
HD normal operation
Old type HD (CP342)
HD LED
Enable floppies
Serial port
Enable COM1
Enable COM3
Disable COM1
Disable COM3
Serial port
Enable COM2
Enable COM4
Disable COM2
Disable COM4
Parallel port
Enable LPT1
Enable LPT2
Disable LPT1
Disable LPT2
Enable onboard HD
Enable game port
Mono display
Colour
External battery
Onboard battery
Power fail detect circuit
External power good
For AA batteries
353
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The PC Engineer’s Reference Book – Vol 2: Motherboards
PC V 386
Jumper
JP1
J3
JP8
JP10
JP11
Position
In
Out
In
Out
2-3
1-2
2-3
In
Out
Function
CGA, EGA, VGA
MDA, HDC, Mono
Onboard battery
External battery
Enable pipelined mode
80387 installed
Not installed
Weitek 3167 installed
Not installed
Position
In
Out
1-2
2-3
Out
Out
In
1-2
Function
CGA, EGA, VGA
MDA, HDC, Mono
Onboard battery
Clear CMOS
External battery at J10
CPU clock divided by 6 (OSCIN/6)
CPU clock divided by 8 (OSCIN/8)
RA12 32K cache
RA13 64K cache
RA14 128K cache
RA15 256K cache
HD LED
PC VII 40
Jumper
JP1
JP2
JP3
JP9
2-3
JP12
Panther 386sx
Jumper
JP1
JP2-4
JP5
JP7
JP8
JP9
JP10
JP11
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
Position
1-2
2-3
JP2
In
Out
Out
In
Out
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
1-2
2-3
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
JP3
Out
In
In
JP4
Out
Out
In
Function
Colour display
Mono
Turbo pin
8042 Turbo pin=27
8042 Turbo pin=24
8042 Turbo pin=23
24mA bus driver
12mA bus driver
IRQ3 for mouse
IRQ4 for mouse
IRQ5 for mouse
IRQ2 for mouse
Enable mouse
Enable floppy
Enable onboard HD
Enable COM1
Disable
Enable COM2
Disable
Enable LPT1
Floppy primary address 3F1
Floppy secondary address 371
HD primary address 1F0
HD secondary address 170
COM1 primary I/O address 3F8
COM1 secondary I/O address 3E8
COM2 primary I/O address 2F8
COM2 secondary I/O address 2E8
O
Jumper
JP21
JP23
Position
1-2
2-3
In
Out
Function
LPT primary I/O address 378
LPT secondary address 278
Clear CMOS
Normal
Powerstation 486
Jumper
JP1
JP2
JP3
JP4,5
JP6
W2
Position
1-2
2-3
Out
In
Out
In
In
In
Out
1-2
2-3
Function
Clear CMOS
Onboard battery
External battery at J4
CGA, EGA, VGA display
Mono
Enable floppy
Enable HD
ATCLK=CLKIN/6
ATCLK=CLKIN/4
50 MHz CPU, single frequency
20,25,33 MHz CPU, double frequency
355
356
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
P
Packard Bell
286X
Jumper
J7
J14
J15
J16
J17,18
J20
J21
J22
J23
Position
1-2
3-4
In
Out
In
Out
In
Out
J17
1-2
2-3
In
In
Out
In
J18
2-3
1-2
Function
Enable COM1
Enable COM2
RAM 0 wait state
RAM 1 wait state
256Kx9 RAM
1Mbx9 RAM
Disable 384K relocation
Enable
Parallel port
LPT1 IRQ7
LPT2 IRQ5
Keylock
Enable floppy
Colour display
Mono
Enable HD
386SX
16-bit HD controller automatically disables IDE.
Jumper
W3
W4
W11
W12
W16
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Function
Mono display
Colour
Disable floppy
Enable
Disable onboard VGA
Enable
Disable IDE LED
Enable
Enable PS/2 mouse port
358
The PC Engineer’s Reference Book – Vol 2: Motherboards
386X
Jumper
J7
J11,21
J12
J14,15
J18
J19
J20
J23
J24
Position
1-2
3-4
J11
1-2
2-3
In
Out
J14
1-2
2-3
1-2
2-3
J21
2-3
1-2
J15
1-2
1-2
2-3
2-3
In
In
In
Function
Enable COM1
Enable COM2
Parallel port
LPT1 IRQ7
LPT2 IRQ5
Colour display
Mono
DRAM
100ns, FPM, 4 page, 0 ws
100ns, FPM, 1 page, 0 ws
100ns, 1 ws
100ns, 1 ws
Front panel connector
Enable floppy
Enable HD
Keylock
Enable PS/2 mouse port (v5 boards only)
486ES
Jumper
J11
J12
J13
J14
J16
J17
J22
J23, 25
26
J24
J27
J28
J29
J30-33
J34,40
J37
J39
J41
Position
2-3
1-2
In
Out
1-2
2-3
In
Out
In
Out
1-2
2-3
In
Out
J23
In
Out
In
Out
In
Out
J30
Out
In
J34
1-2,3-4
5-6
5-6
In
Out
1-2
2-3
In
Out
Function
Enable onboard VGA
Disable
Colour display
Mono
LPT IRQ7
LPT IRQ5
Password Override
Clear password
Enable I/O
Disable
Boot from Boot block
Normal
VGA IRQ Enable
J25
Out
In
J26
Out
In
J31
1-2
2-3
J40
1-2,5-6
J32
1-2
2-3
3-4
J33
1-2
2-3
CPU Speed
20 MHz
25/40MHz
Enable battery
Disable
Enable Mouse
Disable
External Battery
Reserved
Cache Size
32K
128/512K
CPU Type
486DX/487SX/Overdrive
486SX (U48)
Lock keyboard
Unlock
Onboard Speaker
Auxiliary
Disable onboard RAM
Enable
P
486I
See Packmate486-25
486R/T
Jumper
JMP1
JMP2
JMP3
Position
1-2
2-3
1-2
2-3
1-2
2-3
Function
Enable floppy
Disable
Colour display
Mono
Enable IDE
Disable
Reset
HD LED
Position
In
In
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
1-2
2-3
1-2
2-3
Function
Enable modem
Enable mouse
Disable VGA
Enable
Enable COM3
Enable COM1
Enable COM4
Enable COM2
Enable LPT2
Enable LPT1
LPT IRQ5
LPT IRQ7
Interlaced VGA
Non-interlaced VGA
HD secondary address
HD primary address
Floppy secondary address
Floppy primary address
Auxiliary fan
External speaker
Onboard
486
486SX
487
No cache (NC)
Cache (C)
Front panel
Keylock
J4
J9
486SX-20
Jumper
J11
J12
J13
J14
J15
J16
J18
J19
J20
J22
J23
J26
J27
J28
1-2
2-3
5-6
3-4
1-2
3-4
1-2
J29
J30
720
Something to do with AST? (Similar jumper labels to Bravo MS 5100).
Jumper
J4L1A
J4L1B
Position
1-2
2-3
2-4
5-6
1-2
Function
Password enabled
Password disabled
Normal
Clear CMOS
Allow access to setup
359
360
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J4L1C
J4L1D
J6A2
J6C2
J4G1?
J6C2
Position
2-3
1-2,5-6
2-3,4-5
2-3,5-6
1-2,4-5
2-3,4-5
2-3,5-6
1-2,5-6
1-2
2-3
1-2,4-5
2-3,5-6
1-2,4-5
2-3,5-6
Function
Denied
66 MHz host bus speed
60 MHz
50 MHz
1.5x CPU clock
2x
2.5x
3x
Standard voltage (3.3v)
VRE (3.6v)
2 PCI slots on riser
2 PCI slots on riser
Normal
Recovery Mode
Force 486-25
As for 486R/T
IS-VT286
Jumper
J1
J2
J7
J12
SW1
S1-4
Position
1-2
2-3
1-2
2-3
1-2
2-3
S1
On
Off
S2
On
Off
S3
Off
On
Packmate 486/25
Jumper
E2-E3
E3-E4
E5-E6
E6-E7
Position
Function
256K EPROM
512K EPROM
Enable password
Disable
Position
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
In
Out
1-2
Function
Enable floppy
Enable IDE
Modem COM1
Modem COM3
Serial port is COM2
Serial port is COM4
Parallel port is LPT1
Parallel port is LPT2
LPT IRQ7
LPT IRQ5
VGA IRQ9
No interrupt
Mouse IRQ12
No interrupt
Disable VGA
PB 100
Jumper
Jfdc
Jhdc
Jc13
Jc24
Jlps
Jirq
Jvrq
Jmrq
Jvgas
S4
Off
On
Function
Reset
1Mb (512/512)
512 or 640K
Colour display
Mono
Low system clock
High system clock
ROM size
128K/chip (4)
256K/chip (2)
P
Jumper
Jgams
Jvd
Position
2-3
1-2
2-3
In
Out
Function
Enable VGA
Enable game port
Disable
Colour display
Mono
PB 1000
Jumper
S1
S2
S3,4
S5
S6
S7
S8
Position
On
Off
On
Off
S3
On
Off
Off
On
Off
Off
On
On
S4
On
On
Off
Function
Colour display
Mono
256K BIOS EPROM
128K BIOS EPROM
System speed
10 MHz CPU
8 MHz CPU
5 MHz CPU
Primary floppy address 3Fh
Secondary floppy address 37h
Reserved
Reserved
Reserved
PB 22/23
Jumper
J11
J12
J13
J14
J15
J16
J18
J19
J20
J22
J23
J26
J27
J28
J29
J30
Position
In
In
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
5-6
3-4
1-2
3-4
1-2
Function
Enable modem
Enable mouse
Enable VGA
Disable
Enable COM1
Enable COM3
Enable COM2
Enable COM4
Enable LPT1
Enable LPT2
LPT IRQ7
LPT IRQ5
Interlaced VGA
Non-interlaced VGA
HD primary address
HD secondary address
Floppy primary address
Floppy secondary address
Auxiliary fan
External speaker
Onboard
486
486SX
487
No cache (NC)
Cache (C)
Front panel
Keylock
361
362
The PC Engineer’s Reference Book – Vol 2: Motherboards
PB 25/33
Jumper
Jfdc
Jhdc
Jc1s
Jc2s
Jlps
Jirq
Jpipe
Jrom
Jvd
Position
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Out
1-2
2-3
1-2
Function
Enable floppy
Enable IDE
Enable COM1
Disable
Enable COM2
Disable
Parallel port is LPT1
Parallel port is LPT2
LPT IRQ7
LPT IRQ5
Non-pipeline mode (In is reserved)
512K ROM (Out=256K)
Colour display
Mono
Position
S1
Off
Off
On
On
S3
Off
Off
On
On
S2
Off
On
Off
On
S4
Off
On
Off
On
On
Off
On
Off
S1
On
Off
S2
On
Off
Position
In
Out
In
Out
Function
Colour display
Mono
Disable floppy
Enable
Position
1-2
1-2
1-2
2-3
1-2
2-3
1-2
2-3
Function
Enable floppy
Enable IDE
Modem COM1
Modem COM3
Serial port is COM2
Serial port is COM4
Parallel port is LPT1
Parallel port is LPT2
PB 286
Jumper
S1,2
S3,4
S5
S6
S7
S8
SW2
S1-2
S3
Off
On
PB 286B
Jumper
JP1
JPF
PB 300
Jumper
Jfdc
Jhdc
Jc13
Jc24
Jlps
S4
Off
On
Function
Memory size
256K
512K
640K
640+384K
System clock
High speed
Middle speed
Low speed
Low speed
Reserved
Reserved
Colour display
Mono
10 MHz 80287
4.77 MHz 80287
ROM size
128K/chip (4)
256K/chip (2)
P
Jumper
Jirq
Jvrq
Jmrq
Jvgas
Jgams
Jvd
Jpip
Position
1-2
2-3
In
Out
In
Out
1-2
2-3
1-2
2-3
In
Out
In
Out
Function
LPT IRQ5
LPT IRQ7
VGA IRQ9
No interrupt
Mouse IRQ12
No interrupt
Enable VGA
Disable
Diisable game port
Enable
Colour display
Mono
Pipelined 386
Non-pipelined
PB 301A-B2
Jumper
Jfdc
Jhdc
Jc13
Jc24
Jlps
Jirq
Jinlc
Jmrq
Jvgas
Jgams
Jvd
Jpip
Jspks
Jbts
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
1-2
2-3
In
out
PB 301B-B2
As for PB 301A-B2
PB 301C-C1
As for PB 301A-B2
Function
Floppy primary address
Floppy secondary address
IDE primary address
IDE secondary address
Modem COM1
Modem COM3
Serial port is COM2
Serial port is COM4
Parallel port is LPT1
Parallel port is LPT2
LPT IRQ5
LPT IRQ7
Interlaced monitor
Non-interlaced
Enable mouse port
Disable
Enable VGA
Disable
Diisable game port
Enable
Mono display
Colour
Pipelined 386
Non-pipelined
Enable internal speaker
Disable
Enable external battery
Disable
363
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The PC Engineer’s Reference Book – Vol 2: Motherboards
PB 320
As for PB 300
PB 386CDM-1
As for PB 301A-B2
PB 386-16/20 Supreme
Old
Jumper
JMP1
JMP2
Position
1-2
2-3
1-2
2-3
Function
Colour display
Mono
Disable coprocessor
Enable
Position
1-2
2-3
1-2
3-4
5-6
1-2
2-3
1-2
2-3
Function
Colour display
Mono
80387
No 80387
80287
256K EPROM
512K EPROM
Disable aux IOCS16
Enable
New
Jumper
JMP1
JMP2
JMP3
JMP4
PB 386-25 Rev D
Same as Samsung SD 820
Jumper
E1-E2, E4-E5
E7-8, E10-11
E8-9, E11-12
E13-14
E14-15
E16-17
E17-18
E19-20
E20-21
E22-23
E23-24
E25-26
E26-27
E28-29
E29-30
E34-35
E35-36
E37-38
E38-39
E41-42
E40-41
E53-54
E55-56
Out
In
In
In
Out
Out
E57-58
Function
100ns SIMMs
256K SIMMs
1 Mb SIMMs
Enable LPT1
Disable
Leading edge printer acknowledge
Trailing edge printer acknowledge
Enable LPT2
Disable
Enable COM1
Disable
Enable COM2
Disable
Maths copro installed
Not installed
Enable keyboard reset
Disable
Unix system
Non-Unix
Colour display
Mono
SIMM Type
Static column
FPM
Standard RAS/CAS
64K ROM
P
Jumper
E58-59
E60-62
Out
Out
In
In
E61-63
Out
In
Out
In
Function
128K ROM
Total RAM
1 Mb
2 Mb
4 Mb
8 Mb
PB 386-25 Rev F
Jumper
E2-3
E3-4
E5-6
E6-7
E8-9
E9-10
E11-12
E12-13
E14-15
E15-16
E18-19
E17-18
E23-24
E24-25
E35-36, E30-31, E33-34, E39-40
E32-33, E35-36, E39-40, E30-31
E33-34, E36-37, E38-39, E29-30
E32-33, E36-37, E38-39, E29-30
E42-43, E44-45
E42-43, E45-46
E41-42, E44-45
E47-48
E48-49
PB 386-33
Same as Samsung SD 830
Jumper
E2-4
E3-5
Out
Out
In
In
Out
In
E6-8
E7-9
Out
Out
Out
In
In
Out
In
In
E16-18, E17-19
E18-20, E19-20
E25-26
E26-27
E28-29
E29-30
E31-32
E32-33
E34-35
E35-36
Function
RAM Type
RAS/CAS
FPM
Static column
Total RAM
1 Mb
2 Mb
4 Mb
8 Mb
256K SIMMs
1 Mb SIMMs
Enable LPT1
Disable LPT1
Enable LPT2
Disable
Enable COM1
Disable
Enable COM2
Disable
Function
Leading edge printer acknowledge
Trailing edge printer acknowledge
Enable LPT1
Disable LPT1
Enable LPT2
Disable
Enable COM1
Disable
Enable COM2
Disable
Colour display
Mono
64K ROM
128K ROM
1 Mb RAM
2 Mb RAM
4 Mb RAM
8 Mb RAM
Static column RAM
FPM
Standard RAS/CAS
Onboard RAM 100ns
Onboard RAM 85ns
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The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
E37-38
E38-39
E40-41
E41-42
E43-44
E44-45
E46-47
E47-48
E49-50
E50-51
Function
Mono display
Colour
Enable keyboard reset
Disable
Maths copro installed
Not installed
Leading edge printer acknowledge
Trailing edge printer acknowledge
64K EPROM
128K EPROM
PB 400DX-33
Jumper
J8
J10
J12
J14
J16
J17
J18
J20
J22
J23
J24
J26
J29
J30
J31
J34
J35
J36
Position
In
Out
1-2
2-3
1-2
2-3
In
Out
In
Out
In
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
3-4
1-2,5-6,7-8
1-2,5-6,9-10
In
Out
In
Out
1-2,3-4
3-4
1-2
None
None
1-2,5-6,7-8
1-2,3-45-6,9-19
PB 400DX2-50
As for PB 400DX-33
Function
Enable onboard battery
External battery
Enable onboard VGA
Disable
Disable game port
Enable
Normal VGA
Enable VESA
Colour display
Mono
Enable PS/2 mouse port
Enable COM1
Enable COM3
Enable COM2
Enable COM4
Enable LPT1
Enable LPT2
LPT IRQ7
LPT IRQ5
IDE primary address
IDE secondary address
Floppy primary address
Floppy secondary address
Onboard buzzer
External speaker
486SX
486DX/DX2
487SX, P23T, P24T
Upgrade CPU in U74
No upgrade CPU
486DX2
No DX2
16 MHz CPU
20 MHz CPU
25 MHz CPU
33 MHz CPU
64K cache
128K cache
256K cache
P
PB 400SX-20
As for PB 400DX-33
PB 400SX-25
As for PB 400DX-33
PB 410
Jumper
J11
J12
J13
J15
J16
J17
J22
J23-26
J24
J27
J28
J29
J30-33
J34,40
Position
1-2
Short
Open
1-2
2-3
Short
Open
Short
1-2
2-3
Short
J23
Short
Open
Open
Open
Short
Short
Short
Open
J30
Open
Short
Short
J34
1-2,5-6
1-2,5-6
5-6
3-4
J25
Open
Short
Short
Open
J26
Open
Short
Open
Short
J31
1-2
2-3
2-3
J40
1-2,5-6
3-4
3-4
1-2,5-6
J32
1-2
2-3
2-3
J33
1-2
1-2
2-3
Function
Disable VGA
Colour
Mono
LPT IRQ7
LPT IRQ5
Enable game port
Disable
Enable I/O
Normal
Boot Block
Enable VGA IRQ9
CPU speed
20 MHz
25 MHz
33 MHz
40 MHz
Enable onboard battery
Enable mouse port
External battery connector
CPU > 33 MHz
CPU <= 33 MHz
Cache
32K
128K
512K
CPU type
486DX, ODPR
487SX, POD
486SX
No upgrade CPU
PB 420(T)
As for PB 410
PB 430
Jumper
J11
J12
J13
J16
J17
J22
Position
1-2
Short
Open
1-2
2-3
Short
1-2
2-3
Short
Function
Disable VGA
Colour
Mono
LPT IRQ7
LPT IRQ5
Enable I/O
Normal
Boot Block
Enable VGA IRQ9
367
368
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J23-26
J24
J27
J28
J30-33
J34,40
Position
J23
Short
Open
Open
Open
Short
Short
J30
Open
Short
Short
J34
1-2,5-6
1-2,5-6
5-6
3-4
J25
Open
Short
Short
Open
J26
Open
Short
Open
Short
J31
1-2
2-3
2-3
J40
1-2,5-6
3-4
3-4
1-2,5-6
J32
1-2
2-3
2-3
J33
1-2
1-2
2-3
PB 440(T)
As for PB 430
PB 450
Jumper
J8 Jcol
J9 Jvirq
J10 Jpwdclr
J11 Jgams
J15 Jdack
J16 Jdrq
J17 Jbbe
J18 Jpare
J19 Jvgae
J20 Jio
J25 Jsel
J26 Jcsize
J31
J36 Jspk
J37 Jobmd
J39 Jacf
J40 Jacd
J41 Jace
Position
In
Out
In
Out
In
In
J15
1-2
2-3
1-2
2-3
1-2
2-3
1-2
1-2
1-2
2-3
Any
Open
1-2,3-4
1-2,3-4
5-6
Open
3-4
Open
Open
Close
1-2
1-2,3-4
2-3
1-2
1-2,3-4
2-3
J16
1-2
2-3
Function
Colour display
Mono
Enable video IRQ 9
Disable
Clear password
Enable game port
ECP DMA
Channel 1
Channel 3
Boot block
Normal
Enable parity
Disable
Disable VGA
Disable I/O
25 MHz CPU
33 MHz CPU
No cache
128K
512K
486DX, P24T
486SX
External speaker
Internal speaker
Enable memory
All other
Alternate CPU
No SMM
With SMM
All other
No SMM
With SMM
All other
Function
CPU speed
20 MHz
25 MHz
33 MHz
40 MHz
Enable onboard battery
Enable mouse port
External battery connector
Cache
32K
128K
512K
CPU type
486DX, ODPR
487SX, POD
486SX
No upgrade CPU
P
PB 470
Same as Zenith Z-Station 510
Jumper
J8 Jpwdclr
J9 Jcol
J12 Jirq9
J13 Jio
J14 Jbte
J15 Jvgae
J16 Jpare
J23 Jca2/3
J25 Jcal7/2
J24Jcsize
J27dack
J28drq
J30 Jeride
J31 Jbte
J32 Jsel
J33 Jsx
J34 Jret
J35 Jdev
J36 J(3.3v)
J37 Jmul
J40 Jspk
Position
In
In
Out
In
1-2
1-2
2-3
1-2
1-2
2-3
Any
1-2
2-3
1-2
Any
None
Open
1-2,3-4
J27
1-2
2-3
1-2
2-3
Closed
1-2
2-3
5-6
1-2,3-4
1-2
2-3
Closed
1-2,3-4
3-5,4-6
None
3-4
1-2
Open
3-4
J28
1-2
2-3
Function
Clear password
Colour display
Mono
Enable video IRQ 9
Disable I/O
Boot block
Normal
Disable VGA
Enable parity
Disable
No cache
128K
256K
512K
No cache
128K
256K
512K
ECP DMA
Channel 1
Channel 3
Enable (?)
Disable
Enable onboard battery
25 MHz CPU
33 MHz CPU
SX CPU
Others
Reserved
All CPUs
Enable
3.3v CPU
5v CPU
x3 CPU
x2 CPU
Other
External speaker
Internal speaker
PB 500
Jumper
S1
S2
S3,4
J6
Position
On
Off
On
Off
S3
On
Off
Off
On
Out
1-2
S4
On
Off
On
Off
Function
Serial port is COM2
Serial port is COM1
Parallel port is LPT2
Parallel port is LPT1
Video Type
Auto select
80x25 mono
80x25 colour
40x25 colour
2764/27128/27256
2764/27128/27256/27512
369
370
The PC Engineer’s Reference Book – Vol 2: Motherboards
PB 520
Jumper
J7A1
J1G2
J12H1
J13H1
J13H3
Position
4-5
5-6
1-2
3-4
5-6
7-8
1-2
3-4
5-6
7-8
1-2
3-4
5-6
7-8
Function
66 MHz (not used)
60 MHz
Turbo switch
Recovery
Normal
Program Flash
Write protect
Normal
Clear CMOS
Enable password
Disable
Mono
Colour
Enable setup
Disable
PB 520R
Jumper
J13
J14
J15
J16
J17
J18
J19
J20
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
Function
Not used
66 MHz (not used)
60 MHz
Mono display
Colour
Normal
Clear password
Flash boot block recovery mode
Normal
Flash write enable
Flash write protect
Clear CMOS
Normal
Enable CMOS setup
PB 55
Switch
JP2
JP3
JP4
JP5
JP7
JP8
JP9
JP10
JP11
JP12
JP14
JP15
JP30
Position
In
Out
In
In
Out
In
Out
In
Out
In
In
Out
1-2
2-3
In
Out
Function
Reserved
Colour display
Mono
Reserved
Enable PS/2 mouse
60Hz V/37.8KHz H
56Hz V/35.2KHz H
Multi-sync monitor
PS/2 or other monitor
PS/2 VGA video BIOS
AT VGA video BIOS
Reserved
Reserved
Enable VGA
Clear CMOS
Normal
Internal speaker
External speaker
Centronics printer port
PS/2 (bidirectional) printer port
P
PB 540
Switch
J1J1 (75/90)
J1J2 (75/90)
J1H1 (RCVR)
J1H2 (PRG)
J1H3 (SETUP)
J1H4 (PED)
J1H5 (MO/CLR)
J1H6 (CMOS)
J9N1
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Function
Reserved
Reserved
Flash boot block recovery mode
Normal
Flash write enabled
Flash write protected
Enable CMOS setup
Disable
Normal
Clear password
Mono
Colour
Normal
Clear CMOS
3.45v CPU
3.3v CPU
PB 550
As for PB 540
PB 560
As for PB 540
PB 570
Switch
1
2
3
4
5
6
7
8
J5A2
J13J1
Position
On
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
1-2
2-3
1-2
2-3
PB 580
As for PB 570
PB 590
As for PB 570
Function
Reserved
60 or 66 MHz
50 MHz
Disable password
Enable
Clear CMOS
Normal
Disable setup
Enable
CPU 2x
CPU 1.5x
60 MHz
50 or 66 MHz
66 MHz
50 or 60 MHz
Normal
BIOS recovery
CPU voltage VR
CPU voltage VRE
371
372
The PC Engineer’s Reference Book – Vol 2: Motherboards
PB 600
Jumper
J8
J9
J14
J15
J16
J17
J18
J19
J19
J29
J30
J31
J32
J37
Position
In
Out
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
In
Out
In
Out
In
Out
In
Out
Function
Clear password
Normal
Quick boot
Normal
Boot block
Normal
Disable onboard I/O
Enable
Parity check disable (if no onboard memory)
Enable
Standard power supply
With Standby
ECP DRQ Channel 1
ECP DRQ Channel 3
ECP DACK Channel 1
ECP DACK Channel 3
CPU VR voltage (3.3v)
CPU VRE voltage (3.45v)
Onboard lithium battery
External
60/66 MHz host bus frequency
50 MHz host bus frequency
66 MHz host bus frequency
50/60 MHz host bus frequency
CPU multiplier 2x
CPU multiplier 1.5x
Onboard speaker
External speaker
PB 630
As for PB 650
PB 640
Same as Z-Station Campus
Jumper
J5J1
J5J2
J5K2
J9C1
J4K1
J6A2
Position
1-2,4-5
1-2,5-6
2-3,4-5
1-2,4-5
2-3,4-5
2-3,5-6
1-2
2-3
4-5
5-6
1-2
2-3
1-2
2-3
4-5
5-6
1-2
2-3
Function
50 MHz Host bus speed
50 MHz Host bus speed
66 MHz host bus speed
1.5x CPU
2x CPU
2.5x CPU
Normal
Clear CMOS
Password enabled
Clear password
Normal
Boot block recovery
1/3 PCI CLK
¼ PCI CLK
Enable access to CMOS
Deny access to CMOS
Standard CPU voltage (3.3v)
VRE
P
PB 650
As for PB 570
PB 660
As for PB 640
PB 680
Same as ZDS Cheetah
PB 686
Jumper
JP1
JP2
JP5
JP24,33
Position
1-2
2-3
1-2
2-3
In
Out
JP24
1-3,2-4
1-3,2-4
2-4
1-2
3-4
1-3
JP33
1-3,2-4
1-3,2-4
1-3
1-2
3-4
2-4
Function
128K piggy-back board always on
System sees only 512K RAM
Mono display
Colour display
640K RAM
1 Mb RAM (not on 1 Mb motherboard)
Serial port
DB25=COM1, DB9=COM2
DB25=COM2, DB9=COM1
DB25=COM1, DB9 disabled
DB25=COM2, DB9 disabled
DB9=COM1, DB25 disabled
DB9=COM2, DB25 disabled
PB 800/900 Rev C/D
Jumper
COLOR/MONO
J19
Position
1-2
2-3
1-2
3-4
Function
Colour display
Mono
80287-8
80287-10 (with 30-32 MHz crystal at U17)
PB 88
Processor board
Jumper
S1
S2
S3
S4
S5,6
S7,8
Position
Off
On
Off
Off
Off
S5
Off
On
Off
S7
On
On
PB 8810
As for PB 500.
S6
On
Off
Off
S8
On
Off
Function
Reserved (test)
Maths copro not installed
Installed
Reserved
Reserved
Display type
Low res graphics
High res graphics
Mono
Diskette drives
1 floppy
2 floppies
373
374
The PC Engineer’s Reference Book – Vol 2: Motherboards
PB VX 588
Jumper
S1
S2
S3,4
S5,6
S7
S8
S9
S10
S11
S12
Position
Off
On
Off
S3
On
Off
On
Off
S5
Off
Off
On
On
On
Off
On
Off
On
On
On
On
Function
Reserved (On=test)
Maths copro not installed
Installed
Total RAM
256K
512K
576K
640K
Display type
Mono
40x25 colour
80x25 colour
EGA
1 floppy
2 floppies
8 MHz
5.5 MHz
Enable video
Enable serial port
Enable parallel port
Enable floppy
S4
On
On
Off
Off
S6
Off
On
Off
On
PB VX 88
As for PBVX 588 except:
Jumper
S3,4
S5,6
S8
Position
S3
On
Off
On
Off
S5
Off
Off
On
On
On
Off
S4
On
On
Off
Off
S6
Off
On
Off
On
Function
Total RAM
256K
512K
Reserved
640K
Display type
Mono
40x25 colour
80x25 colour
Reserved
Fast mode
Slow mode
Spectria
Jumper
J8
J9
J10
J15,16
J17
J18
J19
J20
J25
Position
Close
Open
Close
Close
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
Function
Colour
Mono
Enable VGA IRQ9
Clear password
DMA Channel 1
DMA Channel 2
Protected Boot Block
Normal
Enable parity
Disable
Disable Video
Enable
Disable I/O
Enable
25 MHz CPU
P
Jumper
J26
J28
J29
Not Rev D
J30
J31
J32
J39
J40
J41
Position
2-3
Open
Closed
1-2
2-3
Open
2-3
1-2
3-4
5-6
1-2,3-4
3-5,4-6
Function
33 MHz CPU
128K
512K
Reserved
All CPUs
3x CPU
2x CPU
Other multiplier
External battery
SX
All others
5v CPU (3.3v not supported)
Only on Rev G board – do not change (Std/Alt CPU)
Only on Rev G board – do not change (CPU SMI)
Only on Rev G board – do not change (SMIACT)
Victory
Jumper
W3
W4
W9
W11
W12
W16
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
Function
Mono display
Colour
Disable floppy
Enable
80C287-12
80287-6
Disable video
Enable
Disable HD LED
Enable
Enable PS/2 mouse port
Disable
Palit
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
PCI54IT
Code
Motherboard
Panrix
Slot A
Made by anonymous famous manufacturer
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Athlon
AMD 750
5 PCI/1 ISA
768 Mb
2 EIDE, floppy
Notes
Slot A
UDMA/66
3 DIMM sockets
AGP
375
376
The PC Engineer’s Reference Book – Vol 2: Motherboards
Palmax
Pantex
Rebadges Biostars.
PC Chips
Hsing Tech Enterprises. www.pcchips.com. www.protac.com/files/index.html – Europe.
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
AC-00
Motherboard
M 529
M 577
Code
H-01
Motherboard
80486VIP
i430VX
Jumper
JP1
JP2
JP3
JP4
JP5A,B
JP6A-C
JP7A,B
JP8
JP9
JP10
Position
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
3.3/5v
A
2-3
1-2
2-3
1-2
1-2
A
In
Out
In
Out
1-2
2-3
A
B
C
D
E
None
1-2
B
2-3
2-3
1-2
2-3
1-2
B
Out
Out
In
In
C
1-2
2-3
1-2
1-2
1-2
Function
Clear CMOS
Normal
PCI Clock/4
PCI Clock/3
12v Flash ROM
5v Flash ROM
2 Mb Flash ROM
1 Mb Flash ROM
Voltage Selector
CPU Speed
50 MHz
55 MHz
60 MHz
66 MHz
75 MHz
CPU Internal Clock
2x (Intel/Cyrix)
1.5x (Intel/AMD)
2.5x (Intel)
3x (Intel)
256K cache
512K cache
3.5v CPU
2.9v
2.8v
2.7v
3.3v
2.5v
RTC Chip select - Default
80486VIP
Jumper
JP2
JP3A-C
Position
1-2
2-3
JP3C
JP3A,B,C
JP3B,C
JP3A
Function
12v Flash ROM
5v Flash ROM
25 MHz CPU
33 MHz
40 MHz
50 MHz
P
Jumper
J4
JP7-12
JP5 A-D
JP4
JP6
JP8A
Position
3-4
JP7, 8A 2-3, 9A 2-3, 10A3-4, 10C 1-2 3-4, JP12A 1-2, JP12B 1-2
JP6, JP8A 1-2, JP9A 1-2, JP9B 1-2 3-4, JP9C 3-4, JP10A 3-4, JP10B 1-2 3-4,
JP10C 1-2 3-4, JP14 2-3 4-5, JP12A 1-2, JP12B 1-2
JP8B 1-2, JP9A 1-2, JP9B 1-2, JP9C 2-3, JP10A 3-4, JP10B 2-3, JP10C 1-2 34, JP11 2-3, JP14 1-2 3-4, JP12A 2-3, JP12B 1-2
JP8A 1-2, JP9A 1-2, JP9B 1-2 3-4, JP9C 3-4, JP10A 3-4, JP10B 2-3, JP10C 1-2
3-4, JP14 2-3 4-5, JP12A 1-2, JP12B 1-2
JP7, JP8A 2-3, JP9A 2-3, JP10A 3-4, JP10C 1-2 3-4, JP12A 1-2, JP12B 1-2
JP8A 2-3, JP9A 1-2, JP9B 1-2, JP10A 3-4, JP10B 1-2, JP10C 1-2 3-4, JP14 2-3
4-5, JP12A 1-2, JP12B 1-2
JP 13, JP8A 1-2, JP9A 1-2, JP9B 1-2 3-4, JP 9C 3-4, JP10A 3-4, JP10B 1-2 34, JP10C 1-2 3-4, JP14 2-3 4-5, JP12A 2-3, JP12B 1-2
5A-D
JP4
1-2
In
1-2
Out
2-3
In
On
Off
1-2
2-3
Function
Discharge CMOS
486DX/DX2
AMD X5-133, Cyrix 5x86, AMD enh 486 DX2/DX4
Cyrix/IBM/Ti/SGS DX/DX2/DX4
P24D
AMD DX2/DX$
DX4-SL
Cyrix/IBM/SGS DX4-100 (Intel pinout)
CPU Voltage
3.3
4
5
2x CPU Intel, 5x Cyrix, 4xAMD
3x CPU
2x AMD DX4
3x AMD DX4
M 506
Jumper
JP1,2
JP3
JP4
JP5
JP6
JP9
JP10
JP11
Position
1-2
2-3
1-2
2-3
In
Out
A
In
Out
In
1-2
2-3
1-2
2-3
1-2
2-3
A
In
Out
In
Out
B
In
In
Out
B
Out
Out
In
In
Function
LPT DMA1
LPT DMA3
AT bus CPU/6
AT bus CPU/8
12v Flash ROM
5v Flash ROM
CPU Speed
50 MHz
60 MHz
66 MHz
3.5v VRE
3.3v STD/VR
256K cache
512K cache
5v SRAM
3.3v SRAM
Clock Multiplier
2x
1.5x
2.5x
3x
M 529
Same as Elpina/Amptron PM 7400 v1.0. Comes from Hsin Tech
M 559
Jumper
JP3
JP4
Position
Out
In
In
Out
377
Function
Enable Sound pro
Disable
Special Microphone
Normal
378
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J5
JP6
JP8
Position
1-2
2-3
A
In
Out
Out
Out
Out
Out
1-2
2-3
B
Out
In
Out
Out
Out
Out
C
Out
Out
In
Out
Out
Out
D
Out
Out
Out
In
Out
Out
E
Out
Out
Out
Out
In
Out
Function
Normal
Clear CMOS
CPU Core Voltage
3.5v
3.3v
3.2v
2.9v
2.8v
2.5v
12v Flash ROM
5v Flash ROM
M 570 v3.0
Item
Form Factor
CPU
Chipset
Bus
I/O
Video
Jumper
JP2
JP3
JP5
JP6
JP7
Description
AT
Pentium
Notes
Socket 7
100 MHz bus speed
3 PCI/2 ISA
2S, 1P, USP, PS/2
Position
1-2
2-3
1-2
2-3
A
1-2
2-3
2-3
1-2
2-3
1-2
2-3
1-2
A
2-3
2-3
1-2
1-2
2-3
A
Out
Out
Out
Out
In
In
In
In
Out
Out
Out
Out
In
In
In
In
B
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
B
2-3
1-2
2-3
2-3
2-3
B
In
In
In
In
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
UDMA 3
AGP
C
2-3
2-3
2-3
2-3
C
2-3
2-3
1-2
2-3
1-2
C
Out
In
Out
In
Out
In
Out
In
Out
In
Out
In
Out
In
Out
In
D
1-2
1-2
1-2
1-2
1-2
1-2
1-2
1-2
D
In
In
Out
Out
In
In
Out
Out
In
In
Out
Out
In
In
Out
Out
Function
Normal
Clear CMOS
5v DIMMs
3.3v DIMMs
CPU Multiplier
1.5/3.5x
2.5x
4x
5x
2x
3x
4.5x
5.5x
CPU Frequency
60 MHz
68 MHz
83 MHz
66 MHz
75 MHz
CPU Core Voltage
2v
2.4v
2.8v
3.2v
2.1v
2.5v
2.9v
3.3v
2.2v
2.6v
3v
3.4v
2.3v
2.7v
3.1v
3.5v
P
M 571 v1.3
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Jumper
JP2
JP3
JP4
JP5
JP5D
JP6
JP7
JP8A,B
Description
AT
Pentium
Notes
Socket 7
100 MHz bus speed
4 PCI/4 ISA
2 DIMM sockets, 4 72-pin
UDMA 3
2S, 1P, USP, PS/2
Position
1-2
2-3
1-2
2-3
5v
3.3v
A
2-3
1-2
2-3
2-3
1-2
1-2
2-3
A
Out
Out
Out
Out
Out
In
A
1-2
2-3
2-3
1-2
2-3
1-2
B
2-3
2-3
2-3
1-2
2-3
C
2-3
2-3
1-2
2-3
1-2
B
Out
Out
Out
Out
In
Out
B
1-2
1-2
2-3
2-3
C
Out
Out
Out
In
Out
Out
D
Out
Out
In
Out
Out
Out
E
Out
In
Out
Out
Out
Out
Function
Normal
Clear CMOS
Disable Internal VGA
Enable
5v DIMMs
3.3v DIMMs
CPU Frequency
50 MHz
55 MHz
60 MHz
66 MHz
75 MHz
PCI CPUCLK/2
33 MHz
CPU Core Voltage
2.5v
2.8v
2.9v
3.2v
3.3v
3.5v
CPU Internal Clock
1.5x/3.5x
2x
2.5x
3x
P54C (Single Voltage)
P55C (Dual Voltage)
M 575 v1.1
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Jumper
JP1
JP3
JP5
Description
AT
Pentium
Notes
Socket 7
100 MHz bus speed
4 PCI/3 ISA
2S, 1P, USP, PS/2
Position
1-2
2-3
1-2
2-3
A
1-2
B
1-2
3 DIMM sockets, 4 72-pin
UDMA 3
Function
Normal
Clear CMOS
P55C (Dual Voltage)
P54C (Single Voltage)
CPU Internal Clock
1.5x/3.5x
379
380
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP6
JP7
JP9
Position
2-3
2-3
1-2
A
Out
Out
Out
Out
Out
Out
In
A
In
Out
In
Out
Out
In
1-2
2-3
2-3
B
Out
Out
Out
Out
In
Out
Out
B
In
In
Out
Out
C
Out
In
Out
Out
Out
Out
Out
D
Out
Out
Out
Out
Out
In
Out
E
Out
Out
Out
In
Out
Out
Out
MB-5770
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
I/O
Video
Audio
Description
AT
Pentium
90-350 MHz
TX AGP Pro PC100
3 PCI/2 ISA
2S, 1P, USP, PS/2
Notes
Socket 7
100 MHz bus speed
3 DIMM sockets, 2 72-pin
UDMA 3
AGP
3D Sound Pro
MB-5900
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Description
AT
Pentium
90-350 MHz
PC100 TX Pro
3 PCI/2 ISA
Notes
Socket 7
100 MHz bus speed
2 DIMM sockets, 2 72-pin
2S, 1P, USP, PS/2
4 Mb AGP 3D
3D Sound Pro
UDMA 3
AGP
Description
AT
Pentium II/Celeron
233-333 MHz
440EX/LX
3 PCI/2 ISA
Notes
MB-7170
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Celeron up to 300 MHz
2 DIMM sockets, 2 72-pin
2S, 1P, USP, PS/2
4 Mb AGP 3D
3D Sound Pro
UDMA 3
AGP
F
In
In
Out
In
In
In
In
Function
2x
2.5x
3x
CPU Core Voltage
2.5v
3.2v
2.2v
2.8v
3.3v
2.9v
3.5v
CPU External Speed
60 MHz
66 MHz
75 MHz
83 MHz
Enable Sound Pro
Disable
P
MB-7290
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Description
AT
Pentium II
233-450 MHz
PC100 based BXcel
Notes
Slot 1
Celeron 266-300 MHz
100 MHz bus speed
3 PCI/2 ISA
3 DIMM sockets
2S, 1P, USP, PS/2
UDMA 3
AGP
3D Sound
MB-7300
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Description
Micro ATX
Pentium II
233-400 MHz
PC100 BXpert
Notes
Slot 1
Celeron 266-333 MHz
100 MHz bus speed
3 PCI/2 ISA
3 DIMM sockets
2S, 1P, USP, PS/2
8 Mb AGP 3D
3D Sound Aureal
UDMA 3
AGP
Description
AT
Pentium II
233-450 MHz
PC100 BX Pro
Notes
MB-7470
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Slot 1
Celeron 266-300 MHz
100 MHz bus speed
3 PCI/2 ISA
3 DIMM sockets
2S, 1P, USP, PS/2
3D AGP
3D Sound
UDMA 3
64 bit 4 Mb Frame Buffer
Description
Micro ATX
Pentium II
233-500 MHz
440 BX
Notes
MB-7610
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Slot 1
Celeron 266-333 MHz
100 MHz bus speed
3 PCI/1 ISA
3 DIMM sockets
2S, 1P, USP, PS/2
3D Sound Aureal
UDMA 3
AGP
381
382
The PC Engineer’s Reference Book – Vol 2: Motherboards
Triton Board (unidentified)
Jumper
JP1
JP3
JP5
JP6
JP7
JP9
Position
1-2
2-3
1-2
2-3
A
1-2
2-3
2-3
1-2
A
Out
Out
Out
Out
Out
Out
In
A
In
Out
In
Out
Out
In
B
1-2
1-2
2-3
2-3
B
Out
Out
Out
Out
In
Out
Out
B
In
In
Out
Out
C
Out
In
Out
Out
Out
Out
Out
D
Out
Out
Out
Out
Out
In
Out
PC Master
See PC Ware
PC Max
See PC Ware
PC Partner
See Vtech Computer Systems Ltd
www.pcpartner.com
PC Quest
See PC Ware
PC Ware
www.pcware.com
Pine Technology
www.pineusa.com
Award BIOS ID
The last two numbers of the BIOS part number.
E
Out
Out
Out
In
Out
Out
Out
F
In
In
Out
In
In
In
In
Function
Normal
Clear CMOS
P55C (Dual Voltage)
P54C (Single Voltage)
CPU Internal Clock
1.5x/3.5x
2x
2.5x
3x
CPU Core Voltage
2.5v
3.2v
2.2v
2.8v
3.3v
2.9v
3.5v
CPU External Speed
60 MHz
66 MHz
75 MHz
83 MHz
Enable Sound Pro
Disable
P
Code
9C
Motherboard
TL-LX01
Code
AC-00
Motherboard
PT 730A/B
PT 319A
386sx
Jumper
JP1
JP3
JP5
Position
Closed*
Open
1-2*
2-3
Function
Colour display
Mono
387SX clock synchronous (CLK2)
387SX clock asynchronous (OSC2)
Closed
Open
If CPU and copro are same speed, connect JP3 1-2. otherwise, 2-3 with another oscillator.
Turbo speed
Low speed
PT-429G
NetWare compatible 486
Jumper
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP9-11,30
JP12
JP13-17
JP18,19
Position
Short
1-2*
2-3
1-2*
2-3
1-2
2-3*
1-2*
2-3
1-2*
2-3
Open*
Close
JP9
JP9
On
On
On
Off
JP9
Off
On
Off
On
Open
Close
JP13
Open
Open
2-3
1-2
JP18
2-3
JP10
On
Off
Off
On
JP10
On
On
Off
Off
JP10
Off
On
On
Off
JP11
Off
On
Off
Off
JP11
On
Off
On
Off
JP11
On
On
On
Off
JP30
2-3
2-3
2-3
1-2
JP30
JP14
2-3
1-2
2-3
1-2
JP19
Open
JP15
Open
Open
Open
Short
JP16
Open
Short
Short
Short
JP30
JP17
Open
Open
Short
Short
Function
Onboard battery connect
External power good
Internal power good
Normal VGA
Power 9000 VGA
Enable Cx487s * MCA3 only for Master Mode
Normal 3 VESA Master
No CPURDY# Delay 1-T state (50 MHz VESA)
Delay 1-T state (50 MHz VESA)
No PADS# Delay 1-T state (50 MHz VESA)
Delay 1-T state (50 MHz VESA)
Enable CPU test logic
Disable
Clock speed (AvaSem AV9107-05 at U34)
25 MHz
33 MHz*
40 MHz
50 MHz
Clock speed (Chrontel CH9007E at U35)
25 MHz
33 MHz*
40 MHz
50 MHz
Clock speed (MX 8315 at U28)
25 MHz
33 MHz*
40 MHz
50 MHz
CPU speed <=33 MHz (for VL bus)
CPU speed >33 MHz
Cache size
32K
64K
128K
256K*
CPU type
486SX
383
384
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP20
JP21
JP22,23
JP24,25
JP32
GJ1
GJ3
Position
1-2,3-4
1-2,3-4
Open*
Short
1-2
2-3
JP22
1-2
Off
JP22
1-2
1-2
JP24
1-2
Off
JP24
1-2
1-2
1
2
Open
Close
1-2
2-3
Function
486DX/DX2*
P24N/P24T
0 VESA wait state
1 VESA wait state
Bank 0 30-pin SIMM
Bank 2 30-pin SIMM
72-pin SIMM5
Bank 0
Bank 1
72-pin SIMM5
Bank 0 & 1
Bank 1 & 2
72-pin SIMM6
Bank 1
Bank 2
72-pin SIMM6
Bank 1 & 2
Bank 2 & 3
Green AUX #2 connector output #1
Green AUX #2 connector output #2
Normal
Enable Green Function
AMI Megakey keyboard BIOS
Phoenix Multikey keyboard BIOS
1-2
2-3
JP23
2-3
Off
JP23
2-3
2-3
JP25
2-3
Off
JP25
2-3
2-3
Pionex Computers
Rebadges Biostars.
Powertech
Award BIOS ID
The last two numbers of the BIOS part number.
Code
HC
KC
Motherboard
MB 532
MB 533
Code
LC
Motherboard
MB 533
Premio
Formerly CompuTrend. www.premiopc.com
President Technology
Award BIOS ID
The last two numbers of the BIOS part number.
Code
A-00/01
Motherboard
P54SA(B)
Code
Motherboard
Pride
Award BIOS ID
The last two numbers of the BIOS part number.
P
Code
9C
AC
Motherboard
Freeway II
Freeway VX
Code
0C
Motherboard
Freeway II
Freeway II
Freetech Board
Freeway II+
Really a Freetech P586F62T - same as Genoa Turbo Express 586HX v T1B
Freeway VX
Really a Freetech something-or-other.
Prime
Vision Top?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
EC-00
Motherboard
VT 586VX
VT 586VXB v2.4G
Code
FC
GC-00
Motherboard
VT 586VX
VT 586 VXB
Procomp
See also Compower
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
Motherboard
AL B586v1.1
Pronix
(714) 990 8858
See Epox
Proside
Mpact. www.mpactworld.com
Proteam
Protech
Code
Motherboard
385
386
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
Q
QDI
Quality Design Innovation. www.qdigrp.com. www.qdi.se
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1-00
2-00
9C
9C-00
AC
Motherboard
VIP 596P93 v2.0
P5S5480P3
P61440FX
P51430TX-250/Titanium 1
P51437/250A
Advance 3
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Notes
Socket 7
66-100
MPV3
Award
1 PCI/1 ISA
256 Mb
2S, 1P, USP, PS/2
AGP
Advance 5/133(E)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Description
ATX
Pentium II
66-133
Apollo Pro
Award 4.51 PG
Notes
Slot 1
Code
CC
CC
DC
GC
Motherboard
P51437/250A v2.1 BIOS
P51430HX-T2 Frontier
P51430TX Titanium 1B
P51430TX
388
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Bus
Memory (Mb)
Description
4 PCI/3 ISA
512 SDRAM
768 EDO
The usual
AGP
I/O
Video
Comments
Jumper
JAV
JCC
JKB
JFSB1,2
JCLK
Position
Closed
Open
1-2
2-3
1-2
2-3
JFSB1
Close
Open
-
JFSB2
Close
Close
Open
Notes
3 DIMM sockets
Supports LS-120
2x
PCI 2.2 compliant
JCLK
1-2
1-2
2-3
Function
BIOS cannot be overwritten
BIOS can be flashed
Clear CMOS
Normal
Enable keyboard password power-on(set also in BIOS)
Disable
CPU FSB (Overclocking)
66/100 Auto
100
133
Brilliant 1(S)
Jumperless
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium II
66-100
440 BX
Award 4.51 PG
4 PCI/3 ISA
768 Mb
2S, 1P, USP, PS/2
Notes
Slot 1
4.5 x CPU clock
100 MHz
3 DIMM sockets
UDMA 3
AGP
Average
Geniux 4
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Xeon
Intel 440GX
6 PCI/1 ISA
2 Gb
2 EIDE, floppy USB, IR, Intel 82558 LAN
Notes
SMP Slot 2
UDMA/33
4 DIMM sockets
Adaptec AIC 7890AB
AGP 2x
Legend IV
Item
Form Factor
CPU
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
2 Pentium II
4 PCI/3 ISA
512
Notes
EIDE, floppy, AIC 7880P SCSI, 10Base T
Narrow and Wide SCSIO
AGP
Fast
Slot 1
1 slot can be extended for RAID
SDRAM. 4 DIMM sockets
Q
Legend V
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Description
ATX
Pentium II
66-100
BX
Award 4.51 PG
4 PCI/3 ISA
384 SDRAM
768 EDO
Comments
Notes
Slot 1
PII at 333
3 DIMM sockets
JP6 clears the CMOS
Legend VII
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Comments
Description
Baby AT
Notes
Socket 370
66
LX
Award 4.51 PG
3 PCI/2 ISA
256
Legend VIII
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Description
ATX
Pentium II
66-100
BX
Award 4.51 PG
4 PCI/3 ISA
384 SDRAM
768 EDO
Notes
Slot 1
3 DIMM sockets
Synactix 2E
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Comments
Description
ATX
Pentium III/Celeron
1000/733
Intel 815E
Award
6 PCI
512 Mb
2 EIDE, floppy, USB, IR
Intel 815 GMCH
Analog Devices AD 1881
Notes
Socket 370
FSB 166
UDMA/100
3 DIMM sockets
AGP 4x
Superb 1
Item
Form Factor
CPU
Cache
Chipset
Bus
Description
Micro ATX
Pentium/K6
512 Kb
SiS 530
3 PCI/2 ISA
Notes
Super Socket 7
UDMA/66
389
390
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Memory (Mb)
I/O
Video
Audio
Comments
Description
512 Mb
2 EIDE, floppy USB, IR
Notes
2 DIMM sockets
AGP 2x
Crystal C54235
Titanium 1B
Item
Form Factor
CPU
Comments
Description
AT
Pentium
Notes
Socket 7. AMD, Cyrix and Intel
Good board. Overclocks nicely with Windows ‘95, though Flight Sim 98 doesn’t like it.
P51430HX-T2 Frontier
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
JP6
JP10,11
JP16
JP7,26
JP14,15
JP21
JP22
JP23
JP24
JC
Description
AT
Pentium
200
Intel 430HX
Award
4 PCI/4 ISA
8-256
512
2S, 1P, floppy, 2 EIDE, PS/2, USB, IR
Position
JP6
Out
Out
1-2
2-3
JP7
In
In
Out
Out
JP14
2-3
2-3
1-2
1-2
Out
1-2
2-3
In
Out
1-2
2-3
In
Out
JP10
In
Out
In
Out
JP26
In
Out
In
Out
JP15
2-3
1-2
1-2
2-3
JP11
In
Out
Out
In
JP16
Out
Out
In
In
Notes
FPM, EDO & BEDO. ECC. 4 x 72-pin SIMMs.
Function
System Clock
50 MHz
55 MHz
60 MHz
66 MHz
CPU voltage
3.5v (single)
3.3v (single)
3.5v (double)
3.3v (double)
Clock Multiplier
1.5x
2x
2.5x
3x
2.5v Core
2.7v
2.9v
Hardware Green (stop clock)
Normal
Reserved
Reserved
Clear CMOS
Normal
P61440FX
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Description
AT
Pentium Pro
150-200
Intel 440FX
Notes
Q
Item
BIOS
Bus
Memory (Mb)
I/O
Description
Award
4 PCI/4 ISA
8-256
2S, 1P, floppy, 2 EIDE, PS/2, USB, IR
Jumper
JP3-6
Position
JP3
In
Out
1-2
2-3*
JP14
In
Out
In
Out
In
JP23
Close
Close
Close
Close
Close
Close
Close
Close
Open
Open
Open
Open
Open
Open
Open
JP9
JP14-17
JP23-26
JP4
Out
In
JP5
In
Out
JP6
Out
In
JP15
In
In
In
In
Out
JP24
Close
Close
Close
Close
Open
Open
Open
Open
Close
Close
Close
Close
Open
Open
Open
JP16
In
In
Out
Out
In
JP25
Close
Close
Open
Open
Close
Close
Open
Open
Close
Close
Open
Open
Close
Close
open
JP17
In
In
In
In
In
JP26
Close
Open
Close
Open
Close
Open
Close
Open
Close
Open
Close
Open
Close
Open
Close
Notes
FPM, EDO & BEDO. ECC. 4 x 72-pin SIMMs.
Function
System Clock
60 MHz*
66 MHz
Clear CMOS
Normal
CPU clock multiplier
2x
2.5x
3x
3.5x
4x
CPU voltage
3.5v
3.4v
3.3v
3.2v
3.1v
3v
2.9v
2.8v
2.7v
2.6v
2.5v
2.4v
2.3v
2.2v
2.1v
Winnex 1
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Sound
Video
Comments
Jumper
JAV
JCC
JSD
JKB
Description
Micro ATX
Pentium II
66-100
Intel 810
Award 4.51 PG
3 PCI/1 AMR
AGP
Position
Closed
Open
1-2
2-3
1-2
2-3
1-2
Notes
Slot 1
2 DIMM sockets
On board
On board
PCI 2.2 compliant
Function
BIOS cannot be overwritten
BIOS can be flashed
Clear CMOS
Normal
Disable on-board audio
Enable
Enable keyboard password power-on(set also in BIOS)
391
392
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JSB
JFS0,1
Position
2-3
Open
Closed
JFS0
2-3
Open
Open
1-2
JFS1
2-3
2-3
1-2
2-3
Function
Disable
Disconnect PCI 3.3VSB
Connect (use for AMR card)
CPU FSB (Overclocking)
66 MHz
100 MHz
133 MHz
Auto
QTC
P54TS
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Notes
Pentium
75-200
Triton
3 PCI/4 ISA
Quanta
Quantex
Rebadges Biostars.
MBD-4MB2
See Biostar 8433 UUD.
MBD-4PB2
See Biostar 8433 UUD.
FPM/EDO. 4 72-pin sockets
Normal/pipelined burst
Adaptec AIC7870 SCSI
R
Rectron
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0C-00
Motherboard
RT 4S3
Code
1-01
Motherboard
Terminator 80486PCI
RT 4S3
Same as Kaimei KM-S4-1 PCI rev 5.1 or Azza 4SIG
RedFox
Fordlian?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
Motherboard
5ATXB rev B
Code
Motherboard
Rise Computer Inc
www.rise.com.tw. See also MTech
Robotech
GMB-486UNL
Jumper
JP1
JP2
Position
In*
Out
1-2
Function
Colour display
Mono
Discharge CMOS
394
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP4
JP6,7,9,11
JP19
JP20
JP29-31
JP40-42
44,45
JP43
RSAptek
Position
2-3*
1-2,4-5,6-7
2-3,4-5,6-7
5-6
Cache size
32K
64K
128K
256K
In
Out
In
Out
System Speed
25 MHz
33 MHz
40 MHz
50 MHz
Master/Slave
PAL/GAL installed
Not installed
1-2
2-3*
Function
Normal
486DX/DX2
487SX
486SX
JP6
JP7
JP9
JP11
Open
Open
Open
2-3
Open
Short
Open
1-2
Open
Short
Short
1-2,3-4
Short
Short
Short
1-2,4-5
>33 MHz System speed (VL bus)
<=33 MHz System speed (VL bus)
VL Bus 1 wait state
VL Bus 0 wait state
JP29
JP30
JP31
In
Out
In
In
In
Out
Out
Out
In
Out
In
Out
JP40
JP41
JP42
JP44
Out
Out
Out
1-2
In
In
In
2-3
Normal VL Bus clock speed (same as CPU)
VL Bus clock speed same phase as U4800
JP45
2-3
2-3
S
S&D
Award BIOS ID
The last two numbers of the BIOS part number.
Code
AC
Motherboard
P6ALXA
Code
Motherboard
Samsung
DM286-12
Deskmaster. Motherboard/BIOS from Microfive.
Jumper
W2
W3
Position
On
Off
On
Off
Function
Colour display
Mono
Enable VGA
Disable
DM 386-33n
Jumper
NPU
SNA
NP1
ONBAT
IRQ4
IRQ3
IRQ12
Position
1-2
2-3
In]Out
In
Out
In
Out
In
In
In
Function
Maths copro not installed
Installed
Enable cache pipeline mode
Disable
Disable POST input
Enable POST input
Onboard battery
External battery
COM1 IRQ4
COM2 IRQ3
Enable mouse IRQ12
396
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
IRQ9
CRT
Position
Out
In
Out
In
Out
Function
Disable
Enable VGA IRQ9
Disable
Colour display
Mono
SW1
Switch
S1-3
S4
S5
S6
S7
Position
1
On
Off
On
Off
On
Off
On
Off
On
Off
2
On
Off
3
Off
On
Function
VGA
Enable
Disable
Enable write buffer mode
Disable
16-bit mode
8-bit mode
PS/2 VGA
PC/AT Video
Older multi-frequency monitors
Standard PS/2 compatible
DM 386s-16
Switches as for DM386-33n
MFC 6000
Motherboard/BIOS from Microfive.
Switch
S1
S2
S3
S4
S5
S6
S7
S8
Position
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Function
256K RAM chips
64K RAM chips
640K
512K
Reserved
PC compatible keyboard
AT compatible keyboard
COM1 as default system console
Monitor/keyboard as console
10 MHz
8 MHz
Reserved
Colour display
Mono
PCT 286
Jumper
J5
J4,13
J23,29
J3,22
J38,25
Position
On
Off
J4
Off
Off
On
On
On
Off
On
Off
On
J13
Off
On
Off
On
Function
Enable mono display
Disable
Video
Onboard or add-in mono
Add-on CGA or EGA
Not used
Onboard CGA
Parallel port as LPT2, IRQ5
Disable
Parallel port as LPT1, IRQ7
Disable
Serial port as COM2, IRQ3
S
Jumper
J2,24
J14
J15
Position
Off
On
Off
On
Off
Off
On
Function
Disable
Serial port as COM1, IRQ4
Disable
XT keyboard
AT keyboard
Disable maintenance mode
Enable
S300
Switch
JP4,7
S1
S2
S3,4
S5,6
S7,8
Position
On
Off
On
Off
S5
On
Off
On
Off
S7
On
Off
S6
On
On
Off
Off
S8
On
Off
Function
Reserved
Normal
Loop POST
Coprocessor installed
Not installed
Reserved
Display
EGA
Colour 40x25
Colour 80x25
Mono
Floppies
1 drive
2 drives
S500
Switch
JP1
JP3
JP4
JP5
JP6,9
JP7
JP8
JP10,11
JP13
JP14
JP16
SW1
Position
On
On
On
On
Off
On
On
Off
On
Off
1-2
2-3
1-2
2-3
On
Off
2-3
1-2
All out
Up
Down
Function
Enable parallel port
Enable serial port
Enable COM2
Floppy secondary address
Floppy primary address
Enable floppy
Dual speed drive
Single speed
Precomp 187ns
125 ns
High state RAM size
Low state
DMA operating clock=DMA clock
DMA operating clock=SYS clock
512K
640K
10/8 MHz keyboard selectable
10 MHz
8 MHz
Colour display
Mono
S5200
Jumper
SW1
SW2
SW3
Position
Off
Off
Off
Function
Enable floppy
Enable SCSI
Enable serial port
397
398
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
SW4
SW5
SW6
SW7
SW8,9
Position
Off
On
Off
On
Off
On
Off
On
SW8
On
On
Off
Off
SW9
On
Off
On
Off
SW10
Function
Serial port as COM1
COM2
Parallel port as LPT1
LPT2
Colour display
Mono
Primary address 2B0-2B7h
Secondary address 170-177h
Bank 0
Bank 1
RAM Type
4 Mb
1 Mb
1 Mb
2 Mb
1 Mb
None
1 Mb
256K
256K
512K
256K
None
Reserved
S800
Switch
JMP1
JMP2,3
S1
S2,3
S4
S5
S6
S7
S8
Position
In
Out
In
Out
On
On
Off
On
Off
On
On
On
On
Off
Function
Pipelined mode
Non-pipelined
Maths copro enabled
Not enabled
Enable HD
Double density floppies
High density
Disable floppy
Enable floppy
Enable COM1
Enable COM2
Enable LPT1
Colour display
Mono
SD700
Jumper
NPX
JP1,8
Position
1-2
2-3
JP1
3-4
1-2
7-8
5-6
11-12
JP8
7-8
7-8
7-8
7-8
1-2
JP2
JP3,7
JP6
JP8
JP10
In
Out
JP3
Off
On
Out
In
3-4
5-6
9-10
Out
In
JP7
On
Off
Function
386SX not installed
Installed
Serial port
9-pin is COM1
25-pin is COM2
9-pin is COM2
25-pin is COM1
Parallel port is LPT1
Parallel port is LPT2
512K EPROM
256K EPROM
HD Type
Miniscribe old version
Any other
Enable IDE
Other HD controller
Disable parallel port
Disable 9-pin serial port
Diasble 25-pin serial port
Mono display
Colour
S
SD820
As for Packard Bell PB 386-25 Rev D
SD830
As for Packard Bell PB 386-33
SM 386/33T
Jumper
P1
Position
1-2
2-3
In
Out
In
Out
In
Out
Out
In
A
B
A
B
P2
P3
P11
P12
P16
P17
Function
64K cache
128K
80387 installed
Weitek installed
512K EPROM
256K
Feature enabled
Test only
Page violation
Test only
Mouse installed
Not installed
Floppy enabled
HD enabled
SM 486/25TE
Jumper
J1
Position
1-2
Out
1-2
2-3
1-2
2-3
1-2
2-3
J2
J15
J16
J3
J4
J5
J6
J7
J8
J9
J10
J11
J12
1 Mb
Out
Out
Out
Out
Out
2-3
Out
1-2
1-2
1-2
2 Mb
1-2
1-2
1-2
1-2
Out
1-2
Out
1-2
1-2
2-3
SM 486/33TE
As for SM 486/25TE
SPC 3000
Processor board
Function
Enable external cache
Disable
33 MHz
25 MHz
Disable I/O recovery delay
Enable
Always
Reserved
4 Mb
Out
Out
Out
Out
Out
1-2
2-3
1-2
1-2
2-3
8 Mb
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
1-2
2-3
16 Mb
Out
Out
Out
Out
2-3
1-2
1-2
2-3
1-2
2-3
32 Mb
1-2
1-2
1-2
1-2
1-2
1-2
1-2
2-3
2-3
2-3
399
400
Switch
S1
S2
S3
S4
S5,6
S7,8
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
S6
On
Off
Off
On
S8
On
On
Function
POST
Coprocessor not installed
Installed
Reserved
Reserved
Video
Low Res graphics
High Res graphics
Mono
Auto
Floppies
1 drive
2 drives
S4
Off
On
Off
On
Function
Serial port is COM1
Serial port is COM2
Parallel port is LPT1
Parallel port is LPT2
Video Type
40x25 colour
80x25 colour
80x25 Mono
Disable
On
Off
S5
Off
On
Off
On
S7
On
Off
SPC 3000V
Switch
S1
S2
S3,4
Position
Off
On
Off
On
S3
On
Off
Off
On
SPC 6100
Jumper
JP1
JP2
JP3
JP5
JP23
JP24
JP27
JP33
Position
1-2
2-3
In
Out
In
Out
1-2
2-3
1-2
1-3
2-4
3-4
1-3
2-4
1-2
1-3
2-4
3-4
Function
Reserved
Mono display
Colour
Disable 2nd 256K of main board RAM
Enable
640K main board RAM
1 Mb
Enable LPT1
Enable LPT2
25-pin serial port is COM2
9-pin serial port is COM2
25-pin serial port is COM1
9-pin serial port is COM1
Enable LPT2
Enable LPT1
25-pin serial port is COM2
25-pin serial port is COM1
9-pin serial port is COM2
9-pin serial port is COM1
SPC 6500
Processor board
Jumper
CN2
CN5
CN6
CN8,9
Position
A-C
B-C
A-C
Function
Mono display
Colour
Reserved
Speaker
5.4 MHz maths copro enabled
S
Jumper
CN10
CN13
Position
C-B
A-C
B-C
Function
8 MHz
Daughter board connector
6 MHz
10 MHz
Sam-Tec
www.computersources.com.hk/samtec
San-Li
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
BC
Motherboard
SL-586V
SL-586V+/VPXT3 vC
Code
CC
Motherboard
SP-P2LXC
SL-586V
Acorp 586VX?
SL 586V+
Acorp 5VX32 ver B
San Carlos Computers
Rebadges Biostars.
SBC
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
PC 560
Code
Motherboard
Seanix
www.seanix.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0-00
Motherboard
S 895 Rev 2.A
See-thru Data Systems
www.seethru.com
Code
Motherboard
401
402
The PC Engineer’s Reference Book – Vol 2: Motherboards
Shuttle
Holco. www.spacewalker.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
1-00
9C
9C-00
AC
BC
Motherboard
HOT 523
HOT 433 non PS/2
HOT 553/555/603
HOT 539C rev2
HOT 541/617
HOT 555/557 v1.32
Code
CC
EC-00
IC
HC-00
KC
Motherboard
HOT 541
HOT 565
HOT 557 v1.5
HOT 569
HOT 555A
HOT-419
486 VL Bus. CPU setting also uses resistor pack on JPA, B and C. Align pin 1 of resistor to mark on board.
Jumper
JP10-11
13,50
JP21-23
JPA-C
JP30
JP33
JP34
JP36
JP53
JP55,69
JP58
JP59
JP60-62
Position
JP10
JP11
Open
Open
Open
Short
Short
Short
Short
Short
Short
Short
JP21
JP22
2-3
2-3
1-2
2-3
2-3
1-2
1-2
2-3
2-3
1-2
Open
2-3
2-3
Open
2-3
Open
Set resistors
Set resistors
Resistors + JP44,45,46
Resistors + JP44,45,46
Resistors + JP44,45,46
Resistors + JP44,45,46
Set resistors
Resistors + JP48
Resistors + JP48
Short
Open
Open
Short
Close
Open
2-3
1-2
1-2
JP55
JP69
1-2,3-4
Open
2-3
Short
Open
Close
Open
Close
JP60-62
JP70-72
JP13
2-3
1-2
2-3
1-2
1-2
JP23
1-2
1-2
2-3
1-2
1-2
2-3
2-3
Open
JP50
Open
Open
Open
Open
Short
Function
Cache size
64K (8Kx8)
128K (32Kx8)
256K (32Kx8 double bank)
256K (64Kx8 single bank)
512K (128Kx8)
System clock
20 MHz
25 MHz
33 MHz
40 MHz
50 MHz
25 MHz (DX4, P24T)
33 MHz (DX4, P24T)
50 MHz (DX4, P24T)
486DX/DX2
486SX, UMC U5-S
486DX/DX2/DX4 S, AM486 Enh
486SX-S
P24D (DX2 w/b)
P24T
Am486DX/DX2/DX4
Cyrix 486S
Cyrix 486DX/DX2
Colour display
Mono
VESA bus high speed write 0 WS
VESA bus high speed write 1 WS
VL Bus speed >33 MHz
VL Bus speed <=33 MHz
Normal
Delay CPU ADS# signal
Reserved
CPU RDY# signal delay
33/50 MHz with fast VL bus devices
33/50 MHz with slow VL bus devices
P24T cache w/t
P24T cache w/b
P24D cache w/t
P24D cache w/b
Memory modes
S
Jumper
70-72
JP63
JP64,73
JP65
JP67
JP68
JP74
JP77
JP79
Position
Short
Open
JP64
1-3,2-4
3-5,2-6
3-5,2-6
3-5,2-6
2-3
1-2
Close
403
Function
2 VESA master slots (J20 + another)
1 VESA master slot (J20 is slave)
Power management indicator
CPU voltage
5v
3.3v
3.45v
4v
CPU 3x (DX4)
CPU 2x (DX4)
reserved
EPMI connector (power save)
Reserved
Reserved
Reserved
2-3
1-2
JP73
N/A
1-2
Open
2-3
2-3
2-3
1-2
HOT-433P
486 PCI
Jumper
JP1-3
JP8
JP11-14
JP15,16
JP17-32
Position
JP1
2-3
1-2
2-3
1-2
1-2
2-3 or Open
JP11
JP2
2-3
1-2
1-2
2-3
JP3
1-2
1-2
1-2
2-3
JP12
JP13
JP14
2-3
1-2
1-2
1-2
2-3
1-2
1-2
1-2
2-3
1-2,3-4
2-3
1-2
1-2,3-4
2-3
2-3
1-2
1-2,3-4,5-6
JP9
JP15
JP16
1-2
1-2
1-2
2-3
2-3
3-4
2-3
2-3
5-6
2-3
2-3
7-8
2-3
2-3
JP10 1-2 2-4, JP19 1-2, JP25 1-2, JP28 1-2 3-4, JP30 3-4
JP10 1-2 2-4, JP19 1-2, JP25 1-2, JP28 2-3, JP30 3-4
JP10 1-2 2-4, JP17 1-2, JP19 3-4, JP20 2-3 4-5, JP21 1-2, JP25 2-3, JP28 2-3
JP10 1-2 2-4, JP17 1-2, JP19 3-4, JP20 2-3 4-5, JP21 1-2, JP25 2-3, JP28 1-2 3-4, JP30 3-4
JP10 1-2 2-4, JP17 1-2, JP19 3-4, JP20 2-3 4-5, JP21 1-2, JP 22 In, JP23 In, JP25 2-3, JP28 1-2 3-4,
JP30 3-4, JP31 In, JP32 In
JP10 1-2 2-4, JP17 1-2, JP19 3-4 5-6, JP20 2-3 4-5, JP21 1-2, JP25 2-3, JP27 2-3, JP30 2-3
JP10 1-2 2-4, JP17 1-2, JP19 3-4, JP20 2-3 4-5, JP21 1-2, JP25 2-3
JP10 1-2 2-4, JP17 1-2, JP19 3-4, JP20 2-3 4-5, JP21 1-2, JP25 2-3
JP10 1-2 2-4, JP17 1-2, JP19 3-4, JP20 2-3 4-5, JP21 1-2, JP22 In, JP23 In, JP24 2-3, JP25 2-3, JP28 1-2
3-4, JP30 3-4, JP31 In, JP32 In
JP10 1-3 4-6, JP17 2-3, JP19 3-4, JP20 1-2 3-4, JP21 1-2, JP25 2-3, JP26 2-3, JP27 1-2, JP28 1-2 3-4,
JP29 2-3, JP30 3-4
JP10 1-3 4-6, JP17 2-3, JP19 3-4, JP20 1-2 3-4, JP21 1-2, JP25 2-3, JP26 2-3, JP27 1-2, JP28 2-3, JP29
1-2
Function
System clock
25 MHz
33 MHz
40 MHz
50 MHz
12v Flash ROM
5v
Cache Size
128K
256K (Double bank)
256K (Single Bank)
512K (Single Bank)
512K (Double Bank)
1 Mb
CPU Voltage
5v
3.3v
3.45v
3.6v
4v
486DX/DX2
486SX
486SX-S
DX/DX2/DX4-S
P24D
P24T
AM486DX/DX2/DX4
(NV8T, SV8T)
Am486DX4 enh (SV8B)
Am5x86-P75 (X5-133)
Cyrix 5x86
Cyrix Cx486DX/DX2/DX4
Cyrix Cx486S (M6)
404
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
JP10 1-3 4-6, JP19 1-2, JP21 2-3, JP25 2-3, JP26 1-2, JP27 2-3, JP28 2-3, JP29 3-4, JP30 1-2 3-4
None
2-3
1-2
2-3
None
JP18
JP24
HOT-555A
Jumper
JP18
Position
1-2
2-3
JP33
None
None
None
None
None
JP33
3.4,5-6
3-4,5-6
3-4,5-6
3-4,5-6
3-4,5-6
JP33-4
JP39,JP43
JP33-4
JP39,JP43
JP34
In
In
In
In
In
JP34
Out
Out
Out
Out
Out
JP39
None
2-4
3-4
1-3
1-2,2-4
JP39
None
2-4
3-4
JP43
1-2
1-2
1-2
1-2
1-2
JP43
1-2
2-4
33 1-2 (open) & 44 (shut) reserved
In
Out
JP45
Function
12v Flash EPROM
5v Flash EPROM
Single CPU voltage (VIO=Vcore)
2-8v
2.9v
3.1v
3.3v
3.5v
Dual CPU voltage (VIO, Vcore separate)
2-8v (Vcore)
2.9v (Vcore)
3.1v (Vcore)
3.3v (VIO)
3.4v (VIO)
Normal CMOS
Clear CMOS
HOT 569
Same as Acusharp Excalibur TX 1569
HOT-661V
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Video
Jumper
J17
JP19
JP37
JP38
Description
ATX
Pentium II
333
Via Apollo
Award 4.51PG
4 PCI/3 ISA
Position
1-2
2-3
1-2,3-4,5-6,7-8
1-2,3-4,5-6
1-2,5-6,7-8
1-2,5-6
3-4,5-6,7-8
3-4,5-6
5-6,7-8
JP38
JP44
1-2,4-5
2-3
Notes
NCR SCSI
4 banks SDRAM
AGP
Function
12v Flash EPROM
5v Flash EPROM
Clear CMOS
2x CPU Clock Ratio
2.5x CPU Clock Ratio
3x CPU Clock Ratio
3.5x CPU Clock Ratio
4x CPU Clock Ratio
4.5x CPU Clock Ratio
5x CPU Clock Ratio
Keyboard/PS2 mouse power-on
Disabled
Function
UMC 486S U5
3:1 Core-Bus ratio
2:1 (4:1 X5-133)
P24D WT cache
P24D WB cache
Other CPU
S
Jumper
JP39
Position
2-3,5-6
2-3,4-5
1-2,5-6
1-2,3-4,5-6
5-6
3-4,5-6
1-2,5-6
None
1-2,3-4
1-2
1-2
2-3
JP45
Function
Enabled
Mouse only
Keyboard only
50 MHz CPU Host Clock
66 MHz CPU Host Clock
75 MHz CPU Host Clock
83 MHz CPU Host Clock
100 MHz CPU Host Clock
103 MHz CPU Host Clock
Overspeeds 66-100 MHz bus speed (disregards CPU)
Silicon Star Intl
See Abit.
SMT
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
BC
Motherboard
TX3
5TA
Code
CC
Motherboard
5TA
Soltek
Now EpoX. www.soltek.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
9C
AC-01
Motherboard
82440FX (Ppro)
SL 54P5
SL-54T5
Code
CC
EC
FC
SL54P2/P5
Jumper
SW1
S1-2,5
S3-4
S5
S6
Position
S1
Off
On
On
Off
Off
On
On
Off
Off
S3
On
Off
On
On
Off
S2
Off
Off
On
On
Off
Off
On
On
Off
S4
Off
Off
Function
Clock Multiplier
1.5x
2x
2.5x
3x
3.5x
4x
4.5x
5x
5.5x
Host bus speed
60 MHz
66 MHz
AMD K6 CPU
AT Power Supply
ATX
Motherboard
SL 54P5/U5
SL 56D5/D!
SL 66B
405
406
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP7
JP14
JP15
J1
J2
Position
1-2
2-3
Open
1-2
3-4
1-2,3-4
5-6
1-2,5-6
3-4,5-6
1-2,3-4,5-6
7-8
1-2,7-8
3-4,7-8
1-2,3-4,7-8
5-6,7-8
1-2,5-6,7-8
3-4,5-6,7-8
1-2,3-4,5-6,7-8
1-2
2-3
1-4
6-10
12-13
14-15
1-4
5-6
8-10
11-12
14-15
Function
Clear CMOS
Normal
2v CPU
2.1v
2.2v
2.3v
2.4v
2.5v
2.6v
2.7v
2.8v
2.9v
3v
3.1v
3.2v
3.3v
3.4v
3.5v
Non-Intel Flash or normal
Intel Flash
HD
IR
Power
Sleep
Speaker
Reset
Power LED
Keylock
Turbo LED
SL 65MV
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Comments
Description
ATX
Pentium III/Celeron
1000/700
VIA ProSavage PM133
Award
5 PCI/1 ISA/1 AMR
1.5 Gb
2 EIDE, floppy, USB, IR
S3 Savage 4
WM9701A
Notes
Socket 370
FSB 200
UDMA/66
3 DIMM sockets
AGP 4x
Sowah Research
www.sowah.com
Spear Motherboard?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
FC-00
Motherboard
SR-M504
SR-M504
Spear Motherboard SM-M504?
Code
Motherboard
S
Soyo
www.soyo.co.uk www.soyo.com.tw www.soyo.nl
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1
1-00
1-00
2-00
3
9
9C
9C-00
Motherboard
25M/N/P/Q/R/R2
30 A/B/C Serial or 030F2
025N2
4S A2/A5
25J/K/L
4SA W2/W5
5TF0/2/5
5VA2 or 4SA W2/W5
Code
AC
BC-00
GC-00
HC
IC
LC
PC
QC
Motherboard
5TF
5BT5
5VD2/D5
5TA2
5VA
5TC2
5TE2/5TCU
5TA2
VL Bus 486
Jumper
JP4-6
JP9,10
JP14-16,23
JP21
JP22
JP30
Position
JP4
Open
Close
Open
Close
JP7
On
On
Off
Off
JP14
1-2
1-2
2-3
Close
Open
Close
Open
Close*
JP5
Open
Close
Close
Open
JP8
On
On
On
Off
JP15
1-2
1-2
2-3
JP6
Close
Close
Close
Open
JP9
2-3
1-2,3-4
1-2
Open
JP16
1-2
1-2
2-3
JP10
2-3
1-2
1-2
2-3
JP23
Close
Open
Open
Function
CPU clock
25 MHz
33 MHz
40 MHz
50 MHz
Cache size
256K (2 banks SRAM)
256K (1 bank SRAM)
128K
64K
CPU voltage
3.3v
3.45v
5v
VESA clock >33 MHz
VESA clock <=33 MHz
VESA 1 wait state
VESA 0 wait state
Output clock speed select
CPU (Blue)
JP11
JP12
JP13
JP17
JP18
486SX
2-3
2-3
DX/DX2
2-3
1-2,3-4
1-2
DX/SL
1-2
1-2
1-2,3-4
1-2
5-6
P24D
1-2,4-5
1-2,4-5
1-2,3-4
1-2
3-4,5-6
P24T
1-2
1-2
1-2,3-4
2-3
5-6
Cyrix M6
1-2,3-4,5-6*
1-2,3-4,5-6
2-3
2-3,4-5
Cyrix M7
1-2,3-4,5-6*
1-2,3-4,5-6
1-2,3-4
1-2
2-3,4-5
AMD DXL
2-3
2-3
1-2,3-4
1-2,3-4
1-2
UMC 486
2-3
2-3
2-3
3-4
1-2
* is for double clock. For P24C, as for DX-SL plus JP20 Open for 3x, 1-2 for 2.5x, 2-3 for 2x
SY-D61BA(2)
Item
Form Factor
CPU
Description
ATX
Dual Pentium II
Notes
Slot 1
JP19
1-2,3-4
1-2,3-4
1-2,3-4
2-3,4-5
2-3
-
407
408
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Description
Notes
82440BX
Award
4 PCI/2 ISA
1024
133 MHz bus speed
2S, 1P, USP, PS/2
AGP
UDMA 3. Adaptec 7880 UW SCSI
4 DIMM sockets
SY-D61GA
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Xeon
Intel 82440GX
Notes
6 PCI
2 Gb
2 EIDE, floppy USB, IR, Intel 82558 LAN
AGP
100
4 DIMM sockets
Adaptec AIC-7890AB
2x
SMP Slot 2
SY-25J/K/L
486 VESA
Jumper
JP3
JP4
JP5
JP6
JP9,10,13
JP29-31
JP24
JP35-37
Position
In
Out
In
Out
1-2
2-3
JP9
2-3
2-3
1-2
1-2
JP29
In
Out
In
Out
1-3,2-4
3-5,4-6
All 1-2
All 2-3
JP10
N/A
1-2
2-3
2-3
JP30
Out
In
Out
In
JP13
1-2
2-3
2-3
2-3
JP31
In
In
Out
Out
Function
Colour
Mono
8 MHz (standby) mode
Full speed
Retain CMOS data
Discharge CMOS
Green switch. Pin 1 is GRD.
Cache size
64K
128K
256K (2 banks SRAM)
256K (1 bank SRAM)
CPU external speed (red jumpers)
25 MHz
33 MHz
40 MHz
50 MHz
5v
3.45v
Bank 0=30 pin SIMMs
Bank 0=72 pin SIMMs
CPU (Blue)
JP1
JP2
JP11
JP12
JP14
486SX
2-3
1-2
3-4
2-3
2-3
DX/S1/4,ODP
2-3
1-2
3-4
2-3
3-4
Cyrix S/DX (M7)
1-2
2-3
2-3
1-2
1-2,3-4
AMD DX2/80
2-3
1-2
3-4
2-3
1-2,3-4
AMD DX4/100
1-2
3-4
2-3
1-2,3-4
2-3
P24T
2-3
1-2
3-4
2-3
1-2,3-4
P24D
1-2
1-2
1-2,3-4
2-3
1-2,3-4
DX4 (P24C)**
2-3
1-2
3-4
2-3
1-2,3-4
**JP27 and 34 always in except for DX4 (P24C) which has JP34 out.
JP15
2-3
2-3
2-3
2-3
1-2
2-3
2-3
JP16
In
-
JP18
2-3
2-3
2-3
2-3
2-3
2-3
1-2
2-3
JP19
4-5
4-5
2-3
4-5
4-5
1-2
4-5
4-5
JP20
2-3
1-2
2-3
-
JP21
1-2
1-2
1-2
1-2
2-3
1-2
JP22
2-3
1-2
1-2
-
JP23
2-3
1-2
-
S
SY-25 Q/R, T Serial
486 VESA
Jumper
J20
JP4-6
JP9,10
Position
2-3*
3-4
1-4
JP4
Out
In
Out
In
JP14
1-2
1-2
1-2
2-3
JP9
2-3
1-2,3-4
CPU (Blue)
486SX
DX/DX2
DX/SL,DX4,ODP
P24T (OD)
DX4
P24D
AMD DXL/2
AMD DX2
AMD DX4
Cyrix DX/DX2
UMC U5S
JP5
Out
In
In
Out
JP15
1-2
1-2
1-2
2-3
JP10
2-3
1-2
JP11
1-2
1-2
1-2
1-2,4-5
2-3
1-2,3-4
2-3
JP6
In
In
In
Out
JP16
1-2
1-2
1-2
2-3
JP27
1-2
2-3
5-6
None
JP12
2-3
2-3
1-2
1-2
1-2
1-2,4-5
2-3
2-3
2-3
1-2,3-4,5-6
2-3
JP13
2-3
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
2-3
Function
Retain CMOS data
Discharge CMOS
External battery
CPU external speed (red jumpers)
25 MHz
33 MHz
40 MHz
50 MHz
CPU voltage
3.45v
3.6v
4v
5v
Cache size
256K (2 banks SRAM)
256K (1 bank SRAM)
JP17
1-2
1-2
2-3
1-2
1-2
1-2,3-4
1-2
1-2
1-2
3-4
SY-5BT5
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Description
Baby AT
Pentium
430 TX
4 PCI/3 ISA
Notes
Socket 7
75 MHz bus speed
2 DIMM sockets, 2 72-pin
512K
2S, 1P, USB, PS/2
UDMA 3
SY-5EAS5
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Baby AT
Pentium
Eteq 6618
Award
3 PCI/4 ISA
512
1 Mb
2S, 1P, USB, PS/2
Notes
Socket 7
66
UDMA 3
JP18
5-6
5-6
5-6
3-4,5-6
1-2
2-3,4-5
1-2
JP19
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
2-3
-
JP20
-
JP26
In
-
409
410
The PC Engineer’s Reference Book – Vol 2: Motherboards
SY-5ED5/M
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
ATX
Pentium
266
Eteq 6628
5 PCI/2 ISA
512K/1 Mb
2S, 1P, USB, PS/2
Notes
Socket 7
VIA Apollo VP3 under licence
75 MHz
3 DIMM sockets, 2 72-pin
UDMA 3
AGP
SY-5EHM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
Baby AT
Pentium
Eteq 6638/EQ 82
Award
3 PCI/3 ISA
576 Mb
1 Mb
2S, 1P, USP, PS/2
AGP
Notes
Super Socket 7
66-100
UDMA 3
SY-5EMA
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Problems
Comments
Description
ATX
Pentium
Notes
Eteq 6638 EQ 82C)
Award 4.51PG
5 PCI/2 ISA
512 Mb
1 Mb
2S, 1P, USP, PS/2
124 MHz bus speed
Super Socket 7
2 DIMM sockets, 2 72-pin
UDMA 3
AGP
Poor documentation
Cheap, but MSI MS5169 is a better buy
SY-5EMM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
ATX
Pentium
Notes
Eteq 6638
4 PCI/3 ISA
100 MHz bus speed
Super Socket 7
2 DIMM sockets, 2 72-pin
1 Mb
2S, 1P, USP, PS/2
UDMA 3
AGP
SY-5SSM
Item
Form Factor
CPU
BIOS
Description
ATX
Pentium
Award
Notes
Super Socket 7
S
Item
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Perforrmance
Video/Sound
Description
SiS 530
4 PCI/1 ISA
768
1 Mb
2S, 1P, USP, PS/2
Notes
66-83
UDMA 3
Good – just behind Tyan S1590
AGP/ESS 1938S 3D on board (no slots)
SY-5STM
Item
Form Factor
CPU
BIOS
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Description
ATX
Pentium
Award
SiS 5598
2 PCI/2 ISA
256
1 Mb
2S, 1P, USP, PS/2
Notes
Super Socket 7
66-83
UDMA 3
SY-5T F0/F2/F5 Serial
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Comments
Jumper
JP3
JP4
JP5
JP6
JP10,11
JP13,14
JP20
JP22
JP24
JP40
JP30,31
Description
AT
Pentium MMX
75-200
Notes
Cyrix 6x86, AMD 5x86. Socket 7.
Award PnP Flash
4 PCI/4 ISA
4-512
512
2S, 1P, Floppy, 2 EIDE, PS/2
NCR 810 SCSI supported
EDO
256 standard. PB. COAST upgrade.
Defaults setup for Pentium 100
Position
In*
Out
1-2
In
Out*
2-3
JP10
In
Out
In
Out
JP13
Out*
In
In
Out
Out*
In
2-3
2-3
In
JP30
JP11
In
Out
Out
In
JP14
Out*
Out
In
In
JP31
Function
EGA/VGA
Mono
Reserved
Clear CMOS data
Retain CMOS data
Reserved
Host bus Speed
25 MHz
27.5 MHz
30 MHz
33 MHz
Core/Bus Ratio
3/2 (1.5)
2/1 (2)
5/2 (2.5)
3/1 (.33)
256K PB cache
512K PB cache (COAST upgrade)
Reserved
Reserved
Reserved
CPU voltage
411
412
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JPS2
Position
In*
Out
In
Out*
Out*
In
Function
Standard and VR (3.3v + 5%)
VRE (3.45-3.6v)
Enable PS/2 mouse (IRQ12 available to system)
Disable PS/2 mouse (IRQ12 available to system)
SY-5XA5
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
ATX
Pentium
Notes
430 TX
75 MHz bus speed
Socket 7
5 PCI/3 ISA
3 DIMM sockets, 2 72-pin
512K
2S, 1P, USP, PS/2
UDMA 3
SY-6BA+(III/IV)
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium III/Celeron
440BX
Award
5 PCI/2 ISA
1 Gb
2S, 1P, USP, PS/2
AGP
Notes
Slot 1
66-133
4 DIMM sockets PC100
UDMA/33
Good – near Super Micro P6SBA
SY-6BB
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
AT
Pentium II
Notes
440BX
133 MHz bus speed
Slot 1
3 PCI/3 ISA
3 DIMM sockets
2S, 1P, USP, PS/2
UDMA 3
Description
ATX
Pentium II
Notes
SY-6BE(+)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
82440BX
Award
4 PCI/3 ISA
768
2S, 1P, USP, PS/2
AGP
Slot 1
66-133
3 DIMM sockets
UDMA 3
S
SY-6IBM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
ATX
Pentium II
Notes
Slot 1
82440BX
Award
3 PCI/1 ISA
768
66-133
3 DIMM sockets
2S, 1P, USP, PS/2
UDMA 3
SY-6IZA
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Celeron
Intel 82440ZX
Award
3 PCI
256 Mb
The usual
AGP
Notes
Socket 370
66-133
SY-6KB
Item
Form Factor
CPU
Speeds (MHz)
Bus
Memory (Mb)
Video
Performance
Comments
Description
ATX
Pentium II
233-333
4 PCI/3 ISA
512
Notes
Slot 1
SDRAM/EDO. 4 DIMM sockets
AGP
Poor
Poor documentation
SY-6KD
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Dual Pentium II
Notes
440 LX
4 PCI/2 ISA
66/75
2S, 1P, USP, PS/2
Slot 1
4 DIMM sockets
UDMA 3
AGP
SY-6KE
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Description
ATX
Pentium II
440LX
Award
4 PCI/3 ISA
Notes
Slot 1
66-100
413
414
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Memory (Mb)
I/O
Video
Description
768
2S, 1P, USP, PS/2
AGP
Notes
3 DIMM sockets
UDMA 3
Description
AT
Pentium II
440LX
3 PCI/3 ISA
Notes
SY-6KL
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
2S, 1P, USP, PS/2
Slot 1
83 MHz bus speed
3 DIMM sockets, 2 72-pin
UDMA 3
AGP
SY-6VZA
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Notes
Socket 370
Apollo Pro
Award
3 PCI
512
2S, 1P, USP, PS/2
AGP
66-133
2 DIMM sockets
UDMA 3
SY-71WA-F
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
ATX
Celeron
500
Intel 810
Award
5 PCI
512
Notes
2S, 1P, USP, PS/2, joystick, audio
UDMA 3
Socket 370
Possibly 1 ISA depends on model
3 DIMM sockets PC 100
SY 7VCA
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Comments
Description
ATX
Pentium III/Celeron
866/533
VIA Apollo Pro 133A
Award
5 PCI/1 ISA/1 AMR
1.5 Gb
2 EIDE, floppy, USB, IR
Notes
Socket 370
FSB 155
UDMA/66
3 DIMM sockets
AGP 4x
Sigmatel STAC9721T
SY-V6BE+
Item
Form Factor
CPU
Speeds (MHz)
Description
ATX
Pentium II
Notes
Slot 1
S
Item
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
Apollo Pro
Award
4 PCI/3 ISA
768
Notes
2S, 1P, USP, PS/2
AGP
UDMA 3
66-133
3 DIMM sockets
Spacewalker
See Shuttle
Spear Motherboard
Sowah Research?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
CC-00
Motherboard
SM-M504
Code
Motherboard
SM-M504
Sowah Research SR-M504?
Spica
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
P5TX-AT
Code
AC
Motherboard
SC 9700
Spring Circle
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
9C-00
AC
Motherboard
SP566
P5C01
ST586/SP564
Code
AC-00
BC
BC
Motherboard
P561-U03
ST586/P561-4
P571-3
Sukjung
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
SJ-PTM HX
Code
Motherboard
415
416
The PC Engineer’s Reference Book – Vol 2: Motherboards
SuperMicro
www.supermicro.com
370SBA
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Video
Comments
Description
ATX
Celeron
Notes
Socket 370
66-100
Intel 440BX
AMI
4 PCI 1 ISA
768 Mb
AGP
370SLM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Video
Comments
Description
Micro ATX
Celeron
Notes
Socket 370
66
Intel 440LX
AMI
3 PCI
768 Mb
AGP
370SSA
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Comments
Description
ATX
Pentium III/Celeron
1000/733
Intel 815E
AMI
6 PCI/1 AMR
512 Mb
2 EIDE, floppy, USB, IR
Intel 815 GMCH
Crystal 4299
370SVM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Video
Description
Micro ATX
Celeron
Notes
Socket 370
66-100
Via Apollo +
Award
3 PCI
768 Mb
AGP
370SWM
Item
Form Factor
Description
Micro ATX
Notes
Notes
Socket 370
FSB 133
UDMA/100
3 DIMM sockets
AGP Pro 4x
S
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Video
Description
Celeron
417
Notes
Socket 370
66-133
Intel 810
AMI
2 PCI
768 Mb
AGP
PIIISCA(E)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Video
Comments
Description
ATX
Pentium III
Notes
Slot 1
133 FSB
Intel 820
AMI
5 PCI 1 AMR
1 each shared. UDMA/66
2 RIMM/2 DIMM sockets E has 3 RIMM sockets
AGP 4x
Better try a Via Apollo Pro Plus board, or Slot A
PIIISEA
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Video
Comments
Description
ATX
Pentium III
Notes
Slot 1
133 FSB
Intel 810E
AMI
4 PCI/3 ISA 1 AMR
1 each shared. UDMA/66
2 DIMM sockets
Mediocre
Via Apollo or 820 is better for performance
P5MMA98
Item
Bus
Memory (Mb)
Problems
Description
4 PCI/4 ISA
Notes
1 each shared
4 72-pin slots
Linux can lock up during boot due to keyboard timeout. Recommended Flash ROM update can kill BIOS and
board (possibly upgraded now).
P55
Item
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Comments
Description
75-180
Triton
3 PCI/4 ISA
128
512
EIDE Mode 4
Notes
1 each shared. PCI busmastering. Use triton.exe.
FPM/EDO. 4 SIMM sockets.
CWA has asynchronous, CWS has pipelined burst synchronous.
Cheap
P6DBE
Item
Form Factor
CPU
Speeds (MHz)
Description
ATX
Dual Pentium II
233-450
Notes
Slot 1
418
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
440BX
AMI 2 Mb
5 PCI/2 ISA
1 Gb registered SDRAM
Notes
4 DIMM sockets
2 EIDE, floppy, USB
AGP
P6DBS
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
ATX
Dual Pentium II
233-450
440BX
AMI 2 Mb
4 PCI/3 ISA
1 Gb registered SDRAM
Notes
2 EIDE, floppy, USB
AIC 7895 Dual UW+50 pin. RAIDport II
AGP
Slot 1
4 DIMM sockets
P6DGU
Item
Form Factor
CPU
Cache
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Xeon
Notes
SMP Slot 2
Intel 440GX
5 PCI/2 ISA
2 Gb
2 EIDE, floppy USB, IR
4 DIMM sockets
Adaptec AIC-7890AB
AGP 2x
P6DLS
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Performance
Description
ATX
2 Pentium II
450
440LX
AMI
4 PCI/3 ISA
512 SDRAM
1 Gb EDO
Notes
Slot 1
4 DIMM sockets
UDMA EIDE, floppy, AIC 7880P SCSI
P6DGH
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Description
AT
Dual Pentium II
233-450
440GX
AMI 2 Mb
9 PCI/2 ISA
2 Gb
Notes
4 DIMM sockets
Ultra and Ultrawide ports
Solid
S
Item
Cache (K)
I/O
Video
Description
Notes
2 EIDE, floppy, USB
AIC 7896 Dual Ultra 2. RAIDport III. UDMA
AGP
Description
ATX
Dual Pentium II
233-450
440GX
AMI 2 Mb
5 PCI/2 ISA
2 Gb
2 EIDE, floppy, USB
Notes
P6DGU
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Slot 1
4 DIMM sockets
AIC 7890 U2W+UW+50 pin. RAIDport III
AGP
P6SBA
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Comments
Description
ATX
Pentium II
233-450
440BX
AMI WinBIOS 2.5
4 PCI/3 ISA
768 Mb registered SDRAM
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
Notes
Slot 1
UDMA/33
3 DIMM sockets
AGP
Excellent (actually “stunning…” PC Pro)
Good price
P6SBU
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium III/Celeron
600/400
440BX
AMI 2 Mb
4 PCI/3 ISA
1 Gb registered SDRAM
Notes
Slot 1
4 DIMM sockets
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
AIC 7890 U2W+UW+50 pin. RAIDport III
AGP
Competent
Description
ATX
Pentium III/Celeron
600/400
440BX
AMI 2 Mb
4 PCI/3 ISA
1 Gb registered SDRAM
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
Notes
P6SBS
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Slot 1
4 DIMM sockets
419
420
The PC Engineer’s Reference Book – Vol 2: Motherboards
P6SLA
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium II
233-333
440LX
AMI 2 Mb
4 PCI/3 ISA
768 EDO or 384 SDRAM
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
Notes
Slot 1
3 DIMM sockets
AGP
Reasonable. 75 MHz bus speed, 6 x multiplier.
P6SWA
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
ATX
Pentium II
Notes
Slot 1
Intel 810E
AMI 2 Mb
4 PCI/3 ISA
512 Mb
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
UDMA/66
2 DIMM sockets
P6SWD
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
ATX
Pentium II
Notes
Slot 1
Intel 810DC-100
AMI 2 Mb
4 PCI/3 ISA
512 Mb
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
UDMA/66
2 DIMM sockets
S2DGR
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Dual Pentium II/Xeon
400-500
440GX
AMI 2 Mb
4 PCI/2 ISA
2 Gb
2 EIDE, floppy, USB
Notes
Description
ATX
Dual Pentium II/Xeon
400-500
440GX
AMI 2 Mb
5 PCI/2 ISA
2 Gb
Notes
4 DIMM sockets
AIC 7895 Dual UW+50 pin. RAIDport II. UDMA
AGP
S2DGU
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
4 DIMM sockets
S
Item
I/O
Video
Description
2 EIDE, floppy, USB
Notes
AIC 7890 U2W+UW+50 pin. RAIDport III. UDMA
AGP
S2DG2
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Description
ATX
Pentium II/Xeon
Intel 440GX
Notes
SMP Slot 2
5 PCI/2 ISA
2 Gb
2 EIDE, floppy USB, IR
4 DIMM sockets
Adaptec AIC-7896N LVD
AGP 2x
S370SED(A)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
Micro-ATX
Celeron
Notes
Socket 370
Intel 810E
3 PCI (6 for SEA)
512 Mb
2 EIDE, floppy
UDMA/66
2 DIMM sockets
S370SWD
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
Micro-ATX
Celeron
Notes
Socket 370
Intel 810DC-100
3 PCI
512 Mb
2 EIDE, floppy
UDMA/66
2 DIMM sockets
S370SW(M)(T)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Comments
Description
Micro-ATX
Celeron
Notes
Socket 370
Intel 810L
3 PCI, AMR
512 Mb
2 EIDE, floppy, USB, ser, par, joystick, audio
SuperPower
www.superpower.com.tw
UDMA/66
2 DIMM sockets
Embedded AGP
Better boards for power
421
422
The PC Engineer’s Reference Book – Vol 2: Motherboards
6XV-133
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Comments
Description
AT
Pentium II
Notes
Slot 1
Via Apollo Pro Plus
5 PCI/2 ISA
768 Mb
UDMA/66
3 DIMM sockets
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
AGP
Excellent Value
6XW
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Comments
Description
ATX
Pentium II
Notes
Slot 1
Intel 810E
5 PCI
512 Mb
2 DIMM sockets
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
AMR
Excellent Value
P2BXA-E
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Comments
Description
ATX
Pentium II
Notes
Slot 1
8x clock multiplier
Intel 440BX
5 PCI/2 ISA
768 Mb
UDMA/33
3 DIMM sockets
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
AGP
SP-586TB
Item
Form Factor
CPU
Bus
Memory (Mb)
Cache (K)
I/O
Jumper
J1,2
JP1
Description
AT
Pentium
4 PCI/3 ISA
Notes
Socket 7
4 72-pin, 2 DIMM sockets
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
Position
1-2
2-3
None
1-2
Function
5v DIMMs
12v
3.5/1.5x CPU
2x
S
Jumper
JP2-4
JP10
JP16
Position
1-2,3-4
3-4
5-6
JP2
JP3
1-2
1-2
2-3
2-3
2-3
2-3
2-3
1-2
2-3
1-2
5-6
1-2
1-2,7-8
1-2,3-4
1-2,3-4,5-6
1-2,3-4,5-6,7-8
JP4
1-2
1-2
2-3
2-3
Function
2.5x
3x
4x
Bus speed
50 MHz
60 MHz
66 MHz
73 MHz
5v Flash ROM
12v
2.1v Ext CPU
2.8v
2.9v
3.2v
3.3v
3.5v
SP-A586B
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Jumper
JB1
JC1-3
JV1
Description
AT
Pentium
Notes
Super Socket 7
Ali-V M1542/1543
Award Green
3 PCI/2 ISA
768
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
Position
None
1-2
1-2,3-4
3-4
1-2,5-6
1-2,3-4,5-6
3-4,506
5-6
JC1
In
Out
In
Out
In
Out
None
1-2
3-4
1-2,3-4
5-6
1-2,5-6
3-4,5-6
1-2,3-4,5-6
7-8
1-2,7-8
3 DIMM sockets
AGP
Reasonable
JC2
In
In
In
In
Out
Out
JC3
In
In
Out
Out
Out
Out
Function
1.5/3.5x CPU
2x
2.5x
3x
4x
4.5x
5x
5.5x
Bus speed
60 MHz
66 MHz
75 MHz
83 MHz
95 MHz
100 MHz
2v CPU Core
2.1v
2.2v
2.3v
2.4v
2.5v
2.6v
2.7v
2.8v
2.9v
423
424
Jumper
JV2
JR1
JBT1
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
3-4,7-8
1-2,3-4,7-8
5-6,7-8
3-4,5-6,7-8
1-2,3-4,5-6,7-8
In
Out
1-2
2-3
1-2
2-3
Function
3v
3.1v
3.2v
3.3v
3.4v
3.3v
3.45v
5v Flash ROM
12v Flash ROM
Normal
Clear CMOS
SP-P2BXA
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium II
Notes
Slot 1
440BX
Award 4.51PG
4 PCI/3 ISA
768
3 DIMM sockets
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
AGP
Below average
Sye
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
Motherboard
5700
Code
Motherboard
T
Taemung/Fentech
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
KBT5A-1 or KBT5A-2
Code
Motherboard
Taiwan Mycomp Corp
See TMC
Taken Corp
www.taken.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
2C
9C
Motherboard
PCI 400
PCI 590-2
Code
AC
BC
Motherboard
PCI 590
PCI 597
Tandon
MCS
Jumper
J6A
J6B,C
Position
In
Out
J6B
Out
On
Off
J6C
Out
Off
On
Function
Security disabled
Security enabled
Base Memory
640K
512K
256K
426
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J10A,B
Y5
Position
J10A
Off
Off
On
On
Off
Off
J10B
Off
Off
Off
Off
On
On
Y5
Empty
Empty
40 MHz
40 MHz
50 MHz
50 MHz
Function
RAM
256K
512K
256K
512K
256K
512K
MCS Pro
Jumper
JP1A,B
J1C
JP2
Position
JP1A
Out
Out
In
In
Out
In
Out
Function
Base Memory
640K
512K
256K
Security disabled
Security enabled
Onboard floppy enabled/disabled automatically
Disabled permanently
JP1B
Out
In
Out
PAC 286/8/10 (Type A)
Switch
1
2
3
4
E1
Position
Off
On
Off
On
Off
On
Off
1-2
2-3
Function
Reserved
Disable 512-640K RAM
Enable
Disable Data Pac 1 ejection
Enable
Disable setup access
Enable
Onboard diskette is secondary controller
Primary controller
PAC 286/8/10 (Type B)
Switch
1
2
3
4
5-8
E1
Position
Off
On
Off
On
On
Off
1-2
2-3
Function
Reserved
Disable 512-640K RAM
Enable
Disable Data Pac 1 ejection
Disable setup access
Enable
Reserved
Onboard diskette is secondary controller
Primary controller
PAC 286/12
Switch
1,2
3
4
E1
E2
Position
S1
Off
Off
On
On
On
Off
Off
Out
1-2
S2
Off
On
Off
On
Function
Base
Extended
640K
384K
512K
512K
256K
384K
256K
512K
Disable security features
Enable
Reserved
Reserved
8 MHz 80287
T
Switch
Position
3-4
5-6
Function
Reserved
10/12 MHz 80287
PAC 386sx
Switch
1
2
3
4
5-8
E1
E5
E6
E7
E8
Position
Off
On
Off
Off
On
Off
Off
1-2
2-3
Out
In
In
Out
Out
Out
Out
Out
Function
Reserved
Disable security features
Enable
Reserved
Disable 512-640K RAM
Enable
Reserved
32K BIOS Chip
64K BIOS Chip
Reserved
1 Mb (J20-23 256K)
2 Mb (J20-27 256K)
2 Mb (J20-21 1 Mb)
4 Mb (J20-23 1 Mb)
8 Mb (J20-27 1 Mb)
Reserved
Reserved
PAC II
Jumper
J19
J22C
J22D
J24
J35A,B
J35C
J36
J37
J38
J39
J41 S1-2
J41 S3-5
Position
In
Out
In
Out
In
Out
In
Out
J35A
Out
Out
In
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Off
S3
On
Off
On
Off
On
Off
J35B
Out
In
Out
S4
On
On
Off
Off
On
On
S5
On
On
On
On
Off
Off
Function
Clear CMOS
Normal
Onboard video is PS/2 VGA mode
Onboard video is AT VGA mode
Onboard video uses PS/2 VGA timing
Onboard video uses standard timing
Term power to SCSI bus
Term power from SCSI bus
Base Memory
640K
512K
256K
Security disabled
Security enabled
16K BIOS size
32K BIOS size
Enable onboard SCSI
Disable
DataPacII/0 normal ejection
Emergency eject
DataPacII/1 normal ejection
Emergency eject
Reserved
RME ID
0
1
2
3
4
5
427
428
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J41 S6
J41 S7
J45
J48
Position
On
Off
In
Out
In
Out
Off
Off
Off
Off
1-2
2-3
Function
6
7
DataPacII/0 normal ejection
Locked
DataPacII/1 normal ejection
Locked
RTC test point
BIOS is standard EPROM
BIOS is Flash EPROM
PCA 6/8
Switch
S1-2
S3
S4-7
S8
Position
Off
On
Off
Off
On
Off
Function
Reserved
Colour adapter
Mono
Reserved
256K chips in Bank 1 (1 Mb)
64K chips in Bank1 (640K)
PCA 12 (Type A)
Switch
J6
1,2
3
4
E1
E2
Position
S1
Off
Off
On
On
On
Off
Off
Out
1-2
5-6
S2
Off
On
Off
On
Function
Reset/LED
Base
Extended
640K
384K
512K
512K
256K
384K
256K
512K
Disable security features
Enable
Reserved
Reserved
8 MHz 80287
10/12 MHz 80287
PCA 12 (Type B)
Switch
J9
J10
J12
1,2
3
4
E1
E2
E3
Position
S1
Off
Off
On
On
On
Off
Off
1-2
1-2
2-3
1-2
S2
Off
On
Off
On
Function
Speaker
Reset/LED
IDE LED
Base
Extended
640K
384K
512K
512K
256K
384K
256K
512K
Disable security features
Enable
Reserved
Reserved
8 MHz 80287
10/12 MHz 80287
BIOS chip size
286N (Type A)
Jumper
W2
Position
1-2
Function
Reserved
T
Jumper
W3
W4
W5
W9
W11
W12
W15
W16
W17
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
In
Out
Function
Enable security features
Disable
Disable onboard floppy
Enable
Disable diskette reduced write current
Enable
12 MHz 802C87
6 MHz 80287
Disable onboard VGA
Enable
Disable IDE LED
Enable
Enable IRQ9
Disable
Disable IRQ12
Enable
Disable 512-640K
Enable
286N (Type B)
Jumper
J2
J3
J4
J5
J6
J7
J8
J9
Position
In
Out
In
Out
1-2
2-3
In
Out
J14
J15
J16
Function
Reserved
Reserved
Enable onboard VGA
Disable
Reserved
Lock keyboard
Normal
Reset
Enable security features
Disable
Disable 512-640K
Enable
Power LED
HD LED
Internal reset
386N (Type A)
Jumper
JP2
JP3
JP5
JP6
JP7
JP8
JP9
JP10
JP11
Position
In
Out
In
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
Function
Disable 512-640K
Enable
Disable security features
Disable IRQ12
Enable
Disable onboard floppy
Enable
Disable onboard IDE
Enable
Disable diskette reduced write current
Enable
64K BIOS
32K BIOS
Disable IDE LED
Enable
Keyswitch/IDE
429
430
The PC Engineer’s Reference Book – Vol 2: Motherboards
386N (Type B)
As for 286N (Type B), except J2,3,5 Out.
386N (Type C)
Jumper
JP1
JP4A
Position
In
Out
In
Out
Out
In
JP4B
JP5A
JP5B
JP10
JP12-14
JP12
1-2
1-2
2-3
1-2
2-3
2-3
2-3
JP13
1-2
1-2
2-3
1-2
2-3
2-3
2-3
JP14
1-2
1-2
2-3
1-2
2-3
2-3
2-3
JP18
JP19
Function
Speaker
Enable 256-640K
Disable
Disable security features
Enable
Reserved
Enable LPT bidirectional mode
Battery
Mem
Fixed
Bank 0
512K
512
1 Mb
512
1.5 Mb
512
256
2.5 Mb
512
4 Mb
1 Mb
10 Mb
1 Mb
16 Mb
4 Mb
HD LED
Power LED
Bank 1
256
256
1 Mb
1 Mb
4 Mb
4 Mb
386-16/20
Switch
1-4
5
6
7
8
Position
1
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Off
Off
On
Off
On
Off
On
2
On
On
Off
Off
On
On
Off
Off
On
On
Off
Off
Off
Off
On
On
3
On
On
On
On
Off
Off
Off
Off
Off
On
On
On
Off
Off
Off
Off
386-25/33
Jumper
W7,8
Position
W7
1-2
2-3*
W8
In
Out*
Function
80387 clock
Asynchronous
Synchronous
4
On
On
On
On
On
On
On
On
Off
Off
Off
Off
Off
Off
Off
Off
Function
Bank1
Bank2
256x9
256x9
256x9
256x9
256x9
256x9
256x9
256x9
256x9
256x9
256x9
256x9
1Mbx9
1Mbx9
1Mbx9
1Mbx9
1Mbx9
256x9
1Mbx9
256x9
1Mbx9
1Mbx9
1Mbx9
1Mbx9
EGA BIOS Disabled
80387
80287
Boot high speed
Normal speed
Mono display
Colour
Total RAM
1 Mb
1 Mb
1 Mb
1 Mb
2 Mb
2 Mb
2 Mb
2 Mb
4 Mb
4 Mb
4 Mb
4 Mb
5 Mb
5 Mb
8 Mb
8 Mb
Interleave
0
2
2
0
2
0
2
T
Jumper
W12,13
Position
W12
In
Out*
W13
1-2
2-3*
W22,23
Switch
1
2
3
4
5
6
7
8
Position
Off
Off
On
Off
Off
Off
Off
On
Off
Off
On
Function
Cache mode
Direct mapped
2-way associative
Reserved
Function
Reserved
809387 not installed
Installed
Reserved
Reserved
Reserved
Enable security features
Disable
Reserved
8.25 MHz bus speed
11 MHz bus speed
386/33 (Type E)
Jumper
JP1
JP2
JP3
JP4
JP5
Position
1-2
2-3
1-2
2-3
Out
1-2
2-3
1-2
2-3
J3
J4
J8
J9
J10
J11
Function
Enable security
Disable
LPT1 uses IRQ7
LPT2 uses IRQ5
Reserved
Disable I/O peripherals
Enable
128K cache
32/64K cache
COM1
COM2
Speaker
Speed LED
Reset
IDE
Sonia II PCX
BIOS supports up to 4 floppies, but onboard controller only supports 2.
Switch
S1
S2
S3,4,JP1
S5,6
Position
On
Off
On
Off
S3
On
Off
Off
On
Off
Off
S5
Off
Off
S4
Off
On
Off
Off
On
Off
S6
Off
On
JP1
2-3
2-3
2-3*
1-2
1-2
1-2
Function
Disable boot on drive A
Enable
Maths copro installed
Not installed
Total RAM
128K
192K
256K
128K
384K
640K
Display
Mono
Colour 40x25
431
432
Switch
S7,8
P2
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
On
On
S7
Off
Off
On
On
1-2
Function
Colour 80x25
None
Floppies installed
1
2
3
4
Disable LPT1
Off
On
S8
Off
On
Off
Off
Sonia III PCX
Jumper
JP1
JP3,4
JP5
Position
In
Out
JP3
B
B
A
A
A
B
JP4
B
A
B
A
Function
64K chips in Bank 1 (256K)
256K chips in Bank 1 (640K)
Display Type
Mono 80 column
Colour 40 column
Colour 80 column
None
Enable LPT1
Disable
SL (Type A)
Jumper
JP1
JP3
JP4
JP5
Position
Out
In
Out
In
Function
16K ROM BIOS
32K ROM BIOS
Reserved
Reserved
Enable onboard floppy
Disable
Position
Off
On
Off
On
Function
Enable security
Disable security
SIMMs not installed
SIMMs installed
SW1
Jumper
1
2
SW2
Switch
1
2
3
4
Position
Off
On
Off
Off
On
Off
On
Function
Disable COM1
Enable
Disable COM2
Disable LPT1
Enable
DRAM 1 wait state
DRAM 0 wait state
SL (Type B)
Jumper
E1
E2
E3
E4
E5,6
Position
2-3
1-2
2-3
2-3
2-3
1-2
2-3
Out
Function
Reserved
IDE IRQ14 enabled
Disabled
Reserved
Reserved
IDE secondary address
IDE primary address
Disable IDE (also E2 to 2-3)
T
Jumper
E7
E8
Position
2-3
1-2
2-3
Function
Reserved
RAM parity checking enabled
Disabled
SW1
Reset switch
SW2
Switch
1,2
3
Position
1
Off
Off
On
Off
On
2
Off
On
On
Function
Memory
640K
512K
256K
Enable security
Disable
SL (Type C)
Jumper
E1
E2
E3
E4
E5
E6,7
E8
E9
E10
E11
Position
2-3
1-2
Out
2-3
2-3
1-2
2-3
1-2
2-3
Out
1-2
5-6
2-3
1-2
2-3
2-3
Function
Reserved
IDE IRQ14 enabled
Disabled
Reserved
Reserved
80287 clock divided by 3
80287 clock used directly
IDE secondary address
IDE primary address
Disable IDE (also E2 to Out)
8 MHz clock to 80287
10/12 MHz clock to 80287
Reserved
RAM parity checking enabled
Disabled
Reserved
SW1
Reset switch
SW2
Switch
1,2
3
Position
1
Off
Off
On
Off
2
Off
On
On
Function
Memory
640K
512K
256K
Enable security
Tower 386
Switch
S1
S2
S3
S4
S5
Position
Off
Off
On
Off
On
Off
Off
Function
Reserved
Coprocessor not installed
Coprocessor installed
I/O bus speed 8.25 MHz
I/O bus speed 11 MHz
Reserved
Reserved
433
434
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
S6
S7
S8
Jumper
W9
W10
W14,15
W30
W98
Position
Off
On
On
Off
Position
Off
On
Off
On
W14
On
Off
Function
Security enabled
Disabled
Normal operation
Reserved
W15
1-2
2-3
1-2
2-3
Function
Non-cacheable region D00000-DFFFF
Non-cacheable region E00000-FFFFFF
Base memory 640K
Base memory 512K (BIOS >3.7 only)
Cache Mode
Direct mapped
2-way set associative
Reserved
256K SIMMs
1 Mb SIMMs
Tower 486
Switch
S1,2
S3
Position
S1
Off
Off
On
Off
On
S4
J7
J8
J9
J10
S2
Off
On
On
Function
Memory
640K
512K
256K
Security enabled
Disabled
Reserved
IDE LED
Battery
Speaker
Reset & LEDs
Tatung
www.tatungusa.com
TCS 4000
Jumper
J1
J2
J3
J4
J5
J6
J7
J8
J9
J12
J13
J18
J19
Position
In
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Function
For readjusting WDC 10 MHz VCO frequency after repairs. This is removed when adjusting C38 and replaced afterwards.
Onboard WDC select disabled
Enabled
Onboard FDC select disabled
Enabled
HDD data cable
HDD control cable
External battery
System clock mode
DMA clock mode
Floppy cable
Keyboard
Reset/keylock
HDD LED, Power LED, speaker
EPROM select mode
ROM select mode
27128 ROM
27256 ROM
T
Jumper
J20
J21
Position
1-2
2-3
Function
Special EGA card on main board
80287 at 10 MHz
80287 at 4.77 MHz
SW1
Switch
S1-4
Position
S1
On
On
On
On
Off
Off
S2
On
Off
On
On
Off
Off
Position
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Function
Colour display
Mono
640K onboard memory
512K or 1 Mb onboard memory
Enable COM1
Disable
Enable COM2
Disable
Enable LPT1
Disable
System clock speed 6(8) MHz
10 MHz
S3
S4
On
Off
On
Off
On
Off
On
Off
S5-8
Function
Drive A
1.2 Mb
360K
1.2 Mb
1.2 Mb
360K
360K
Reserved
Drive B
1.2 Mb
360K
1.2 Mb
360K
SW2
Switch
1
2
3
4
5
6
TCS 7000
Jumper
J1
J2
J7
J10
J12
S1-4
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
S1
On
Off
S2
On
Off
S3
Off
On
S4
Off
On
Function
Reset
System board memory 1 Mb
512/640K
Colour display
Mono
0 wait state
1 wait state
Low system clock
High system clock
ROM select
128K
256K
TC Computers
Rebadges Biostars.
Tekram
www.tekram.com
Award BIOS ID
The last two numbers of the BIOS part number.
435
436
The PC Engineer’s Reference Book – Vol 2: Motherboards
Code
9C
Motherboard
P6L40-A4
Code
9C
Motherboard
P5V30-B4 rev 1/P5T30B4
P5M4-M
Item
Form Factor
CPU
Cache
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
Micro ATX
Pentium/K6
512 Kb
Via MVP4
4 PCI/1 ISA
768 Mb
2 EIDE, floppy USB, IR
Notes
Super Socket 7
UDMA/66
3 DIMM sockets
P6B40-A4
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium II
Notes
Slot 1
440BX
Award 4.51PG
4 PCI/3 ISA
1 Gb
4 DIMM sockets
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
AGP 2x
Reasonable
P6BX-A
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium II
Notes
Slot 1
440BX
5 PCI/2 ISA
768 Mb
UDMA/33
3 DIMM sockets
2S, 1P, EIDE, floppy, 2 USB, 2 PS/2
AGP 2x
TMC
Taiwan Mycomp Company. www.mycomp-tmc.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0
1-00
9C
9C
AC
Motherboard
PCI58PL
PCI48PG/PG4/PAT48PG
PCI541T/P55CIT/PCI54SP
A15TH/VP
PCI541T
Code
AC-00
CC
CC-00
DC
Motherboard
PCI54ST
PCI541T
PCI54ST
PCI541T
T
AI5VG+
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
Baby AT
Pentium/K6 etc
VIA MVP3
Award 4.51PG
4 PCI/2 ISA
768
1 Mb
2S, 1P, floppy, 2 EIDE, IRDA
AGP
Notes
Super Socket 7
66-100
UDMA
CA64
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Comments
Description
ATX
Pentium III/Celeron
1000/733
VIA Apollo Pro 133A
Award
5 PCI/1 ISA/1 AMR
1.5 Gb
2 EIDE, floppy, USB, IR, Intel 82558 LAN
Notes
Socket 370
FSB 133
UDMA/66
3 DIMM sockets
AGP Pro 4x
VIA VT611A
CS65
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Comments
Description
ATX
Pentium III/Celeron
933/733
Intel 815E
Award
5 PCI/1 AMR
512 Mb
2 EIDE, floppy, USB, IR, Intel 82558 LAN
Intel 815 GMCH
Intel ALLC200
Notes
Socket 370
FSB 133
UDMA/100
3 DIMM sockets
AGP 4x
MI7WBM
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Comments
Description
Micro-ATX
Celeron
Notes
Socket 370
Intel 810
3 PCI, 1 AMR
512 Mb
2 EIDE, floppy, ser, par, PS/2, joystick, audio
UDMA/66
2 DIMM sockets
437
438
The PC Engineer’s Reference Book – Vol 2: Motherboards
PCI48PG4
Item
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
486
Opti
Award or AMI WinBIOS
2 PCI/2 ISA/2 VESA
128
256
2S, 1P, Floppy
Notes
P24D
1 PCI/ISA shared.
4 slots – all must be used.
Opti PCI IDE controller (82C621), SMC for serial/parallel/floppy.
PCI54IT
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
Notes
Pentium
90
Triton
Award
PnP 1.0a compliant. Use triton.exe
4 72-pin slots
2S, 1P, Game, IDE
PCI54PV3
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Performance
Description
Notes
Pentium
90
Opti Viper
Award
3 PCI/4 ISA
4 72-pin SIMMs
2S, 1P, Floppy, IDE
Slower than PCI541T
PCI58PL
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium
60/66
Opti
Award
3 PCI/2 ISA/1 VL
192
512
None
Notes
82C822, 82C571, 82C572
1 shared PCI/VL. PCIs busmaster, as does 1 VL.
Parity only. 4 30-pin sockets (Bank 0) and 3 72-pin (0, 1 and 2).
256 standard
PET 48PN
486 EISA + VL Bus
Switch
RNA/B/C/D
RNA/B/C
Position
A1/2
Closed
Open
Open
Open
A3
Closed
B1/2
Open
Closed
Open
Open
B3
Open
C1/2
Open
Open
Closed
Open
C3
Open
D1/2
Open
Open
Open
Closed
Function
Cache Size
64K
128K
256K
512K
CPU
486DX2
T
Switch
RNE1-5
RNF1-5
JP2-4
JP5
JP7
JP8 & 9
W7-10
J4
J5
Position
Open
Closed
Open
Open
On
On
JP2
1-2
1-2
1-2
1-2
1-2
2-3
1-2
Open
Closed
Open
Closed
Open
Closed
W7
Open
Open
Closed
Open
Open
Closed
Open
Closed
Open
Open
Open
Open
Closed
JP3
1-2
1-2
2-3
1-2
1-2
2-3
2-3
JP4
2-3
2-3
2-3
2-3
2-3
1-2
2-3
W8
Closed
Open
Open
Open
Open
W9
Open
Closed
Open
Closed
Open
W10
Open
Open
Open
Open
Closed
1-4
7-17
9-19
10-20
Function
ODP486SX
486DX
487SX
486SX
30 pin SIMMs first
72-pin SIMMs first
CPU
20 MHz
25 MHz
33 MHz
40 MHz (internal)
50 MHz (internal)
50 MHz
66 MHz (internal)
Mono Display
Colour Display
Channel Ready Select Normal
Channel Ready Select EXRDY signal generated
33 MHz VL bus speed
50 MHz
Clock Source
20 MHz
25 MHz
33 MHz
50 MHz
66 MHz
IDE LED
Speaker
Turbo Switch
Reset
IDE LED
TD6NB SCSI
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II
82440BX
Award 4.51PG
5 PCI/2 ISA
1024
2S, 1P, floppy, 2 EIDE, IRDA
AGP
Notes
Description
ATX
Pentium MMX
90-233
VIA VP3
4 PCI/3 ISA/1AGP
Notes
Slot 1
66-100
UDMA
TIVG
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Video
6x86/L/MX, K5, K6
FPM, EDO, SDRAM. 4 72-pin & 3 DIMM sockets.
512
2S, 1P, floppy, 2 EIDE, IRDA
Winbond W83877. UDMA
AGP
439
440
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
SW1
1-4
SW1
5-7
SW2
1-4
JP8
J13
Position
1
On
Off
5
Off
On
On
Off
Off
1
On
Off
On
Off
On
Off
On
Off
On
On
On
1-2*
2-3
1-4
11-15
7-17
8-18
9-19
10-20
2
Off
Off
6
Off
Off
On
On
Off
2
On
Off
On
On
Off
Off
On
On
Off
Off
On
3
Off
Off
7
Off
Off
Off
Off
Off
3
On
On
Off
Off
Off
Off
On
On
On
Off
On
4
Off
Off
4
On
On
On
On
On
On
Off
Off
Off
Off
On
Function
CPU host bus speed
60 MHz
66 MHz
CPU clock multiplier
1.5x
2x
2.5x
3x
3.5x
CPU voltage (IO/Core)
3.3/3.5
3.3/3.2
3.3/3.1
3.3/3
3.3/2.9
3.3/2.8
3.3/2.7
3.3/2.6
3.3/2.5
3.3/2.1
Single voltage CPU
Normal
Clear CMOS
Speaker
Power LED and keylock
ATX power on switch
Turbo LED
Reset
HD LED
TI5VG+
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
ATX
Pentium/K6 etc
Notes
Super Socket 7
VIA MVP3
Award 4.51PG
5 PCI/2 ISA
384
1 Mb
2S, 1P, floppy, 2 EIDE, IRDA
AGP
66-133
UDMA
Fast
TI5VGA
Item
Form Factor
CPU
Cache
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Performance
Comments
Description
ATX
Pentium/K6
2 Mb
Via MVP3
Award
6 PCI
768 Mb
2 EIDE, floppy USB, IR
Notes
Super Socket 7
Supports UDMA 66
UDMA/66
3 DIMM sockets
AGP 2x
Highly rated (PC Pro magazine)
Sound on board
T
TI5VGF
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
ATX
Pentium/K6 etc
Notes
Super Socket 7
VIA MVP3
Award 4.51PG
6 PCI
384
1 Mb
2S, 1P, floppy, 2 EIDE, IRDA
AGP
66-133 MHz
SDRAM only. 3 DIMM sockets
DMA/33
TI6NB(F)+
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II
82440BX
Award 4.51PG
4 PCI/3 ISA
768
2S, 1P, floppy, 2 EIDE, IRDA
AGP
Notes
Description
ATX
Pentium III
Notes
4/1 for BF+ 66-133
64 Mb on board for B+
UDMA
TI6VG4
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
133 FSB
Via Apollo Pro Plus
Award
5 PCI/1 ISA
768
2S, 1P, floppy, 2 EIDE, IRDA
3 DIMM sockets. 64 Mb on board
UDMA
AGP 2x (4x some boards)
TI7NBA
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Description
ATX
Notes
Socket 370
440BX/ZX
Award 4.51PG
4 PCI/2 ISA
768
2S, 1P, floppy, 2 EIDE, IRDA
AGP
TK7AG
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Description
ATX
Athlon
AMD 750
Notes
Slot A
UDMA
441
442
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Bus
Memory (Mb)
I/O
Video
Performance
Comments
Description
4 PCI/3 ISA
768 Mb
2 EIDE, floppy
Notes
UDMA/66
3 DIMM sockets
AGP
Biostar M7MKA is a better choice
Tomatoboards
See Zida
Top Gun
Pentium MMX
Jumper
JP1
JP3 A&B
JP4 A&B
JP5 A&B
JP6
JP7 A&B
Position
1-2
2-3
1-2
2-3
1-2
2-3
A
1-2
2-3
2-3
1-2
Open
A
B
C
D
E
A,B
B
A
Open
B
1-2
1-2
2-3
2-3
Function
Normal
Clear CMOS
Dual voltage CPU (P55C)
Single voltage CPU (P54C)
5v DIMM
3.3v DIMM
Clock multiplier
Intel/AMD 1.5/3.5x
Intel/Cyrix 2x
Intel/AMD/Cyrix M2 2.5x
3x
2.5v CPU Core
3.5v
3.3v
3.2v
2.9v
2.8v
60 MHz host clock
66 MHz host clock
75 MHz host clock
83 MHz host clock
Toshiba
www.toshiba.com
T1200
Jumper
PJ1
PJ3
PJ4
PJ5
PJ6
PJ7
PJ8
PJ9
PL11
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Function
Keyboard
Default
Adjustment when modem card shipped
Default
Adjustment when modem card shipped
Enable DTR
Sets DTR always True
Determine if carrier from distant modem
Set carrier detect always True
LED connector
Modem connector
Power supply (HDC)
LCD
T
Jumper
PJ12
PJ13
PJ14
PJ15
PJ16
PJ17
PJ18,19
PJ20
PJ21
Position
1-2
Out
PJ18
1-2
2-3
1-2
Out
1-2
Out
PJ19
Out
1-2
Function
Power supply 5v
FDD A
FDD B
I/O
Power supply (signal)
Twin floppies
Floppy/HD
ICE
Normal
Connected to copro socket
Copro not installed
Installed
Normal Font
North European (Denmark)
T2100
Switch
S1
S2
S3
S4
S5
S6,7
S8
Position
Off
On
Off
On
Off
On
Off
On
S6
Off
Off
On
On
Off
On
PJ1
PJ3
PJ4
PJ6
PJ7
PJ8
PJ9
PJ10
PJ11
PJ12
PL13
PJ14
PJ15
PJ16
S7
Off
On
Off
On
Function
IRQ4 to Toshiba card slot
IRQ4 to IBM-compatible card slots
IRQ3 to Toshiba card slot
IRQ3 to IBM-compatible card slots
Reserved
Enable internal display controller
Disable
Unidirectional printer port
Bidirectional
Serial 1
Serial 2
COM1
COM2
COM1
COM3
COM2
COM1
COM2
COM3
External FDD is B
External FDD is A
Keyboard
Speaker
Expansion memory
Modem
Plasma display
FD2
FD1
Power supply
Power supply
HD
Colour CRT
Composite video
External FD/printer
RS 232
T3200
Switch
S1
S2
S3
Position
On
Off
On
Off
On
Function
Auto switch display mode
IBM EGA
Bidirectional LPT
Unidirectional
Comms port is CH2
443
444
Switch
S4
S5
S6
S7-10
PJ2
PJ3
PJ4
PJ5
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Off
On
Off
On
Off
On
Off
S7
Off
On
Off
On
Off
1-2
3-4
5-6
7-8
9-10
11-12
S8
Off
Off
Off
On
On
S9
Off
Off
Off
On
On
S10
Off
On
On
Off
Off
1-2 In
3-4 Out
1-2
3-4
5-6
7-8
9-10
Function
Comms port is CH1
Double font in plasma for text
Single font
Disable CRTC for Ext CRTC
Enable internal CRTC (normal)
North European font on display
Other fonts
Monitor
Mono
RGB 40 col
RGB 80 col
Enhanced RGB 200 line
Enhanced RGB 300 line
Reserved
1.6 Mb floppy (Out) 2 Mb (In)
1 floppy (Out) 2 floppies (In)
Double density floppy (Out) HD (In)
640K (Out) 512K (In)
3Mb memory card exp/ext (Out) Expanded (In)
Reserved
MFM Method
10 ns HD delay
15 ns
20 ns
25 ns
30 ns
T5100
Jumper
PJ1
PJ2
PJ3
PJ4
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
PJ5
PJ6
PJ7
PJ8
PJ9
PJ13
PJ14
PJ15
PJ16
PJ17
Switch
S1
S2
S3
S4
Position
On
Off
On
Off
On
Off
On
Function
Brightness connected to PDP board
Not connected
Contrast connected to PDP board
Not connected
3 level grey scale
4 level
16H (horizontal) mode
1H (horizontal) mode
Power supply
FDD
AGS interface
AGS interface
HD
External keyboard
HD power
Fan
Speaker
LED board connector
Function
Disable extended memory (above 1 Mb)
Enable
512K base memory
640K base memory
Disable internal CRT on AGS board
Enable
Printer port to input
T
Switch
S5
S6
Position
Off
On
Off
On
Off
Function
Output
AGS board supports mono
Colour
Internal RS232 secondary, external to primary
Internal RS232 primary, external to secondary
T8500
As for T2100, except:
Switch
PJ1
PJ2
PJ3
PJ4
PJ5
PJ8
PJ9
PJ10
PJ15
PJ16
NMI
Position
Function
Expansion memory
Lithium battery
T3100 bus
Motherboard
FD
Keyboard
HD
Internal SCSI
Connector board I/F connector 1
Connector board I/F connector 2
Non Maskable Interrupt
Totem
www.totem.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C-00
9
9C
Motherboard
TM 586IV v1.3
TM 486SPS
TM 586-IP2/486SPS
Code
AC
BC-00
DC-00
Vision 1
As for DC 286
WS 286
As for DC 286
WS 386
As for DC 286, except no J6.
Transcend
www.transcend.nl
TS-AVD1
Item
Form Factor
CPU
Description
ATX
Pentium III
Notes
Slot 1
Motherboard
TM 586-IP2
TM 586IV2A
TM 586IV2 v3
445
446
The PC Engineer’s Reference Book – Vol 2: Motherboards
Item
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
Notes
133 FSB
Via Apollo Pro Plus
Award
5 PCI/2 ISA
768
2S, 1P, floppy, 2 EIDE, IRDA
3 DIMM sockets
UDMA
AGP 2x (4x some boards)
TS-AWE1
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
ATX
Pentium III
Notes
Slot 1
100 FSB
Intel 810E
Award
5 PCI/1 AMR
768
2S, 1P, floppy, 2 EIDE, IRDA, joystick, audio
Trigem
(800) 766 4377
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0
Motherboard
486SQR
Code
Motherboard
Tulip
AT 386/25
Jumper
J7
J9
J16
J19
J20
Position
1-2
2-3
1-3
2-4
1-2
2-3
Out
Function
27256 EPROM
27128 EPROM
Reserved
In
Out
Colour display
Mono
Selects mono mode
Reserved
Enable floppy
Disable
Position
1-2
2-3
1-2
2-3
1-2
2-3
Function
Colour display CGA or TEVA-2)
Mono
27256 EPROM
27128 EPROM
Enable floppy
Disable
AT 386sx
Jumper
J5
J9
J17
Installation of VGA card does not require J5 to be set
3 DIMM sockets
UDMA
T
AT Compact 1
Processor board
Jumper
J287
JXD
JAP10
J8/10
S1,2
S3
S4
JLM
EM
JRL
Position
J287
1-2
2-3
1-2
2-3
S1
2-3
2-3
1-2
1-2
All out
1-2
2-3
1-2
2-3
1-2 Out
1-2 In
In
Out
1-2
2-3
JXD
Out
Out
1-2
1-2
S2
2-3
1-2
2-3
1-2
JAP10
1-2
2-3
1-2
2-3
AT Compact 2
Jumper
J?
J18
Position
1-2
2-3
1-2
3-4
5-6
7-8
9-10
11-12
13-14
15-16
17-18
19-20
21-22
23-24
25-26
Function
Low fan speed
High
Mouse IRQ3
Mouse IRQ4
Mouse IRQ5
COM2 IRQ 3
COM1 IRQ4
LPT2 IRQ5
LPT1 IRQ7
Enable COM2
Enable COM1
Disable serial port
Enable LPT2
Enable LPT1
Disable parallel port
Compact 3
Jumper
J11
J15
Position
1-2
2-3
1-2
2-3
Function
2 x 32K ROM (27256)
2 x 16K ROM (27128)
Mono display
Colour (CGA or TEVA-2)
Position
Out
In
Function
Normal batteries
Rechargeables
DC 286
Jumper
J5
J8/10
1-2
1-2
2-3
2-3
Function
CPU
Copro
8 MHz
5.33 MHz
8 MHz
8 MHz
10 MHz
6.66 MHz
10 MHz
10 MHz
Total RAM
128K
256K
640K
1 Mb (not used)
Mono display
Mono display
Colour
128K EPROM
256K EPROM
New revision memory expansion card (2.64 MB)
Old revision (640K)
Early memory timing mode
Non-early
Short RAS 160
Reserved
447
448
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J6
J15
Position
1-2
2-3
Function
LED, speaker & battery
LPT1 unidirectional
LPT1 bidirectional
DT 286
As for DC 286
DT 386
As for DC 286, except J17 is network access header
PC Compact 2
L2.1
Jumper
J8
J10
J12
J13
J14
Position
All out
3-4
1-2
All in
1-2
3-4
1-2
3-4
5-6
All out
1-2
3-4
5-6
All out
3-4
5-6
7-8
9-10
Function
Mono
40 col colour
80 col colour
EGA
Serial port IRQ4
IRQ3
IRQ2 for RTC
IRQ3
IRQ4
None
IRQ2 for mouse port
IRQ3
IRQ4
None
Enable LPT1
Enable LPT2
Enable COM1
Enable COM2
L2.2-L2.5
As for 2.1, except:
Switch
SI,SE
Position
SI 1-2
In
Out
Function
SI 3-4
In
Out
SE 1-2
Out
In
Piggy back board installed
FGL chip installed
L3
As for L2.2-2.5
L5 & L6
As for 2.1, except:
Jumper
J22
Position
2-3
1-2
Function
27128 EPROM
27256 EPROM
L7
As for L5 & L6, except:
Jumper
JMEG
Position
1-2
2-3
Function
4C512 DRAMs
4C1024 DRAMs (JLOHI must be set either position)
T
Jumper
JLOHI
Position
1-2
2-3
Function
Low type 4C512 DRAMs
High type
SX Compact 2
Jumper
J14
Position
1-2
2-3
1-2
2-3
All out
1-2
3-4
5-6
7-8
9-10
11-12
13-14
15-16
17-18
19-20
21-22
23-24
25-26
27-28
29-30
31-32
33-34
J17
J18
Function
27256 EPROM
27128 EPROM
Mono display
Colour display
Selects mono mode
Mouse IRQ3
Mouse IRQ4
Mouse IRQ5
COM2 IRQ 3
COM1 IRQ4
LPT2 IRQ5
LPT1 IRQ7
Enable COM2
Enable COM1
Disable serial port
Enable LPT2
Enable LPT1
Disable parallel port
Disable onboard HD
Enable onboard HD
Disable floppy
Enable floppy
TR 386/25
As for AT 386/25
TR 386sx
As for AT 386sx
Twinhead
Tyan
www.tyan.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1C-00
9C
9C-00
AC-00
GC
Motherboard
Tempest II S1462
Tomcat
Trinity (S1592)
S1570/1590
S1562S
Code
JC
JC
JC
JC-00
KC
Motherboard
Titan Pro 1668ATX
Titan III S11468/1466
S1563D (Tomcat III Dual)
S1470 Titan VXAT
S1468 (OEM Newtec, Korea)
449
450
The PC Engineer’s Reference Book – Vol 2: Motherboards
S1590 Trinity AT
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Audio
Performance
Description
AT
Pentium
Notes
Super Socket 7
VIA Apollo MVP3
4 PCI/4 ISA
3 DIMM sockets, 2 SIMMs
1 Mb
2S, 1P, floppy, 2 EIDE, IRDA
UDMA
AGP
Excellent
S1598 Trinity
Item
Form Factor
CPU
Cache
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium/K6
2 Mb
Via MVP3
Notes
Super Socket 7
5 PCI/2 ISA
768 Mb
2 EIDE, floppy USB, IR
UDMA/33
3 DIMM sockets
AGP 2x
S1810 Tomcat
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
I/O
Description
Micro-ATX
Celeron
Notes
Socket 370
Intel 810
4 PCI
512 Mb
2 EIDE, floppy
UDMA/66
2 DIMM sockets
S1837
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Audio
Comments
Description
ATX
Pentium II
Intel 440BX
Notes
6 PCI/1 ISA
1 Gb
2 EIDE, floppy USB, IR, Intel 82559 LAN
UDMA/33
4 DIMM sockets
Adaptec AIC-7896
AGP 2x
SMP Slot 1
ESS ES1373
S1846
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Description
ATX
Pentium II
550
440 BX
Notes
T
Item
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Video
Performance
Description
AMI WinBIOS
5 PCI/2 ISA
768
Notes
2S, 1P, floppy, 2 EIDE, IRDA
UDMA
AGP
Average
Description
ATX
Pentium II
550
Vis Apollo Pro 133A
6 PCI/1 ISA
768
2S, 1P, floppy, 2 EIDE, IRDA
Notes
3 DIMM sockets.
S1854
Item
Form Factor
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
I/O
Video
Performance
Slot 1 & Socket 370
3 DIMM sockets.
UDMA
AGP 4x supported
Average
S1952DLU Thunder X
Item
Form Factor
CPU
Chipset
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium II/Xeon
Intel 440GX
6 PCI/1 ISA
2 Gb
2 EIDE, floppy USB, IR
Notes
SMP Slot 2
UDMA/33
4 DIMM sockets
Adaptec AIC-7896N LVD
AGP 2x
Tiger ATX
S1692S
Item
Form Factor
CPU
Speeds (MHz)
Bus
Memory (Mb)
Description
ATX
Pentium II
233-333
5 PCI/2 ISA
512 SDRAM
1 Gb EDO
Video
Notes
Slot 1
4 DIMM sockets. 3.3v.
AGP
Thunder 2 ATX
S1696DLUA
Item
Form Factor
CPU
Speeds (MHz)
Bus
Memory (Mb)
Video
Audio
Performance
Description
ATX
2 Pentium II
333
4 PCI/2 ISA
512 SDRAM 1 Gb EDO
Yamaha OPL4-ML
Notes
Slot 1
1 each shared, 1 with RAID port extension
4 DIMM sockets
AGP
1 Mb wavetable ROM
Average. 66 MHz bus speed.
451
452
The PC Engineer’s Reference Book – Vol 2: Motherboards
Tomcat I
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium
200
430HX
Award or AMI
4 PCI/5 ISA
512
512
2S, 1P, Floppy, IDE, USB
Notes
1 each shared
Parity or ECC FPM or EDO in 8 slots.
Pipelined burst
Tempest II
Item
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
Cache (K)
I/O
Description
2 Pentium
166
Neptune
4 PCI/5 EISA
512
512
No idea
Notes
FPM only in 8 slots.
256 standard. Asynchronous.
Titan III
Item
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
I/O
Description
Pentium/Cyrix 6x86
166
430FX
Award or AMI
4 PCI/4 ISA
128
512
IDE only
Notes
None shared
3.3 or 5v FPM/EDO in 4 sockets
Pipelined Burst. 256 standard.
Titan Pro
Item
CPU
Speeds (MHz)
Chipset
Bus
Memory (Mb)
I/O
Description
2 Pentium Pro
200
440FX (Natoma)
5 PCI/3 ISA
1 Gb
2S, 1P, Floppy, IDE, USB
Notes
1 each shared
Parity or ECC, EDO/BEDO/FPM
Trinity 400
Item
Form Factor
CPU
Speeds
Chipset
BIOS
Bus
Memory (Mb)
I/O
Video
Description
ATX
Pentium III/Celeron
1000/700
VIA Apollo Pro 133A
Award
6 PCI/1 ISA
768 Mb
2 EIDE, floppy, USB, IR
Notes
Socket 370
FSB 133
UDMA/66
3 DIMM sockets
AGP 4x
U
UHC
Umax
UMC
United Microelectronics
UMC88
Unicom
Unisys
PCI 3xx3
Jumper
J5
J8
J15
Position
In
In
Out
1-2
3-4
5-6
7-8
9-10
11-12
13-14
15-16
17-18
19-20
21-22
23-24
25-26
Out
Out
In
Out
In
Out
Out
Out
In
Out
Out
Out
In
Out
Function
Pipeline mode enabled
Colour display
Mono
SCSI IRQ9
SCSI IRQ10
SCSI IRQ11
Primary host adapter address
DMA DRQ0
DMA DRQ5
DMA DRQ6
DMA DRQ7
DMA DACK0
DMA DACK5
DMA DACK6
DMA DACK7
SCSI enabled
SCSI disabled
454
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
J17
J18
J21
JP2
Position
In
Out
In
Out
In
Out
Function
Parallel port is LPT1
Parallel port is LPT2
VGA controller enabled
Disabled
Intel coprocessor
Others
MPI 4xx3
Jumper
JP2
JP4,5
JP6
JP7
JP8
JP9
JP10
Position
1-3,2-4,5-7,6-8 In
1-2,3-4,5-6,7-8 Out
JP4
JP5
Out
Out
In
In
In
Out
Out
In
1-2 In
2-3 Out
1-2 Out
3-4 In
5-6 Out
7-8 Out
9-10 Out
11-12
13-14
In
Out
Out
In
1-2 Out
3-4 Out
5-6 Out
7-8 In
9-10 Out
11-12 Out
13-14 Out
15-16 In
Function
3.5” diskette connector goes to A
Alternate drive (5.25) connector goes to A
Enable HD controller
Disable
Colour display
Mono
Disable CPU option
Enable
Enable LPT1
Enable LPT2
SCSI IRQ15
SCSI IRQ11
SCSI IRQ10
SCSI IRQ9
SCSI primary address (0340 or 0140)
Enable SCSI
Disable
SCSI DMA DRQ7
SCSI DMA DRQ6
SCSI DMA DRQ5
SCSI DMA DRQ0
SCSI DMA DACK7
SCSI DMA DACK6
SCSI DMA DACK5
SCSI DMA DACK0
MPI 4xx6
Jumper
JP1
JP2
JP3,4
JP6
JP7
Position
Out
In
Out
JP3
Out
In
1-2 Out
3-4 In
5-6 Out
7-8 Out
9-10 Out
11-12
In
Out
15-16 In
1-2 Out
3-4 Out
5-6 Out
7-8 In
Function
Normal 486DX operation
Colour display
Mono
JP4
Out
In
13-14
Out
In
Enable HD controller
Use IDE HD
SCSI IRQ15
SCSI IRQ11
SCSI IRQ10
SCSI IRQ9
SCSI primary address (0340 or 0140)
Enable SCSI
Disable
Enable onboard VGA controller
SCSI DMA DRQ7
SCSI DMA DRQ6
SCSI DMA DRQ5
SCSI DMA DRQ0
U
Jumper
JP8
JP10
JP11
JP12
JP15
JP16
Position
9-10 Out
11-12 Out
13-14 Out
15-16 In
1-2,3-4,5-6,7-8 In
1-3,2-4,5-7,6-8 Out
1-2 In
2-3 Out
1-2 In
2-3 Out
1-2 In
2-3 Out
1-2 In
2-3 Out
1-2 Out
2-3 In
Function
SCSI DMA DACK7
SCSI DMA DACK6
SCSI DMA DACK5
SCSI DMA DACK0
3.5” diskette connector goes to A
Alternate drive (5.25) connector goes to A
Serial B is COM2/4
Serial B is COM1/3
Serial A is COM1/3
Serial A is COM2/4
Parallel port LPT1
Parallel port LPT2
CPU speed select
Enhancement socket select
Unitron
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
U7908
Code
Motherboard
Unknown
F4DXL-UC4.3D/DV (486)
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache (K)
Comments
Jumper
JP4-6
JP11-13
JP17-19
Description
AT
486
Notes
UMC
7 ISA
192 Mb
256
Position
JP4
Off
On
Off
On
JP11
Out
Out
1-2,3-4
1-2,3-4
5-6
1-2,4-5
1-2
1-2
2-3
JP5
Off
On
On
Off
JP12
2-3
2-3
1-2,3-4
5-6
1-2,3-4
5-6
1-2,4-5
1-2
1-2
2-3
3 VESA
JP6
On
On
On
Off
JP13
1-2,3-4
1-2,3-4
2-3
JP17
1-2
1-2
Out
JP18
Out
Out
2-3,4-5
JP19
Out
Out
2-3,4-5
Function
CPU Clock
25 MHz
33 MHz
40 MHz
50 MHz
CPU Type
486DX/DX2
AMD 486DX/DX2 (5v)
Cyrix 486DX
1-2,3-4
1-2
2-3,4-5
2-3
Cyrix 486DX2
1-2,3-4
1-2,3-4
1-2,3-4
1-2,3-4
1-2
2-3
1-2
1-2,3-4
3-4,5-6
5-6
1-2
1-2
1-2,3-4
1-2,3-4
5-6
Out
P24D
P24T
DX4/100
AMD 486DX4/100
455
456
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
Position
2-3
Out
2-3
2-3
2-3
2-3
1-2,3-4
2-3
2-3
1-2,3-4
Out
3-4
JP14-16
JP23
JP14
1-2
1-2
2-3
JP15
1-2
1-2
2-3
JP16
1-2
1-2
2-3
JP23
In
Out
Out
JP14-16
SW1-3
JP14-16
2-3
1-2
1-2
1-2
1-2
In
Out
In
Out
SW1
Off
Off
Off
On
SW2
Off
Off
On
Off
SW3
Off
On
Off
Off
Description
AT
486
7 ISA
64 Mb
256
Notes
JP21
JP22
1-2
Out
1-2
Out
Out
Out
Function
AMD 486 DX2-80*
486SX
UMC 486SX
Insert wire between pin 4 of JP12 and 3 of JP20
CPU voltage (non-dip sw)
3.3v*
3.6v
5v
Use VR LT1086 on U24
CPU voltage (dip sw)
5v
4v
3.6v
3.45v
3.3v
VESA >33 MHz
VESA <=33 MHz
VESA 1 WS
VESA 0 WS
M 601 (486)
Item
Form Factor
CPU
Bus
Memory (Mb)
Cache (K)
Jumper
JP2-6
JP7,8
JP16,17
Position
JP2
Out
Out
In
JP7
1-2
2-3
JP7
1-2
2-3
JP7
1-2
2-3
1-2
2-3
JP7
2-3
2-3
1-2
2-3
JP3
In
In
In
JP8
1-2
1-2
JP8
1-2
1-2
JP8
1-2
1-2
2-3
2-3
JP8
1-2
2-3
1-2
1-2
JP16
1-2,3-4
2-3
1-2,3-4
JP17
1-2
Open
2-3
3 VESA
JP4
Out
In
In
JP24
1-2
1-2
2-3
2-3
JP5
1-2
2-3
1-2
JP6
Out
2-3
1-2
Function
Cache size
64K
128K
256K
TK 9207 Clock Generator
33 MHz
40 MHz
KTS0808c/0801c/AV9107
40 MHz
50 MHz
TK 9307
25 MHz
33 MHz
40 MHz
50 MHz
PLL52C05/KTS KDN 802
25 MHz
33 MHz
40 MHz
50 MHz
v1.3E/F
CPU Type
486DX
SX (Cyrix 486)
P23N
U
3486
Item
Form Factor
CPU
Speeds (MHz)
Chipset
BIOS
Bus
Memory (Mb)
Cache
Jumper
JC1-4
JC5,6
JF1-5
J1-3
J4
J5
Description
AT
386/486
UMC
AMI
6 ISA
32 Mb
256K
Position
1-2
2-3
JC5
1-2,3-4
2-3
1-2,3-4
JF1
Out
Out
Out
In
Out
Out
Out
1-2
2-3
1-2
2-3
1-2
2-3
Notes
1 weird local bus slot
JC6
1-2
Out
2-3
JF2
In
Out
In
In
In
Out
Out
JF3
In
In
Out
Out
In
In
Out
JF4
In
In
In
Out
Out
Out
Out
JF5
Out
In
In
In
In
In
Out
Function
80486
80386 or Cyrix 486DLC
CPU Select (486 above)
DX/DX2
SX
487SX/Overdrive
CPU Speed
25 MHz 386
33 MHz 386
40 MHz 386
20 MHz 486
25 MHz 486
33 MHz 486
50 MHz 486
Local bus card in slot 5
Normal card
Normal
486DX-50 with local bus device
Normal
386/486 DX-50 with local bus device
K5TI
Item
Form Factor
CPU
Bus
Memory (Mb)
Cache
Jumper
JP1,JP2
JP3
JP4
JP5,8
JP6,7
Description
AT
Pentium
6 ISA
Notes
256K
Position
1-2
2-3
1-2,3-4
5-6,7-8
9-10,11-12
Out
3-4
1-2,3-4
JP5
1-2
2-3
2-3
1-2
JP8
Out
2-3
1-2
Function
COM2
Infrared – 87334=HP, 87336=HP or Sharp
ECP DMA 0
ECP DMA 1
ECP DMA 2
50 MHz bus speed
60 MHz
66 MHz
BIOS Type
EPROM
12v Flash
5v Flash
IDE0/1 IRQ 14/15
457
458
The PC Engineer’s Reference Book – Vol 2: Motherboards
Jumper
JP9
JP10
JP11-12
14
JP13
JP15
JP16
JP17,18
JP19
JP20-22
JP23
JP28
Position
2-3
1-2
2-3
In
Out
JP11
1-2
2-3
1-2
1-2
2-3
In
Out
In
Out
JP17
In
Out
In
Out
1-3
2-4
In
Out
1-3,2-4
3-5,4-6
In
Out
JP12
1-2
1-2
2-3
JP14
Out
Out
Out
JP18
In
In
Out
Out
Function
IDE 0/1 MIRQ0/MIRQ1
AT bus PCICLK/3
AT bus PCICLK/4
Clear CMOS
Normal
Cache size
None
256K
512K
5v CPU voltage
3.3v
CPU non-pipeline
Pipeline mode
L1 cache w/t
L1 cache w/b
CPU clock multiplier
2.5x
3x
2x
1.5
3.45 VRE voltage
3.3 VRE/MD voltage
Enable onboard voltage regulator
Disable
5v SRAM
3.3v SRAM
Normal speed
Turbo
SiS 486 PI
Item
Form Factor
CPU
Bus
Memory (Mb)
Cache
Jumper
JP1
Description
AT
486
3 PCI/3 ISA
Notes
4 72-pin
256K
JP5-12
Position
1-2
2-3
1-2
2-3
1-2
2-3
JP5
Off
3-4
Off
Off
Off
2-3
1-2
Off
JP13,W1
*3v AMD DX2– 6-7 for AMD DX4
JP13
W1
1-2
Out
JP2
JP4
JP6
1-2
1-2
1-2
Off
Off
2-3
1-2
Off
JP7
1-2,6-7
1-2,6-7
1-2,6-7
2-3
5-6*
7-8
3-4
2-3
JP8
4-5,6-7
4-5,6-7
4-5,6-7
4-5,6-7
Off
2-3,5-6
1-2,6-7
4-5,6-7
JP9
On
On
On
On
Off
On
On
On
JP10
2-3
2-3
2-3
2-3
2-3
2-3
1-2
2-3
JP11
1-2,3-4
1-2,3-4
1-2,3-4
3-4
Off
2-3
3-4
1-2,3-4
JP12
4-5
4-5
4-5
4-5
4-5
4-5
1-2
4-5
Function
32Kx8/8Kx8 Tag RAM
16Kx8
128K cache
256K cache
Normal
Clear CMOS
CPU Type (Yellow)
Intel P24D/AMD SV8B
AMD 5x86-P75
Cyrix/ST/IBM 5x86
486 SLE DX/DX2/DX4
AMD DX/DX2/DX4 (NV8T)
TI/Cyrix DX2/DX4
P24T (Pentium ODP)
IBM/ST DX4-100
CPU Voltage
3v
U
Jumper
JP18
Position
2-3
Out
Out
1-2
3-4
Function
4v
5v
25 MHz
33 MHz
40 MHz
Out
In
VXPro Pentium
Possibly PC Chips
Item
Form Factor
CPU
Chipset
BIOS
Bus
Memory (Mb)
Cache
Jumper
JP1
JP2
JP3
JP3 D
JP4
JP5
JP6
JP9
Description
AT
Pentium
VxPro
Notes
4 PCI/3 ISA
2 DIMM, 4 72-pin
256K
Position
1-2
2-3
1-2
2-3
A
2-3
1-2
2-3
2-3
1-2
1-2
2-3
1-2
2-3
A
1-2
2-3
2-3
1-2
A
In
Out
Out
Out
Out
1-2
2-3
USI
US Logic
www.uslogic.com
B
2-3
2-3
2-3
1-2
2-3
C
2-3
2-3
1-2
2-3
1-2
B
2-3
1-2
2-3
2-3
B
Out
In
Out
Out
Out
C
Out
Out
In
Out
Out
D
Out
Out
Out
In
Out
Function
Normal
Clear CMOS
5v EDO/FPM DIMM
3.3v SDRAM DIMM
CPU Speed
50 MHz
55 MHz
60 MHz
66 MHz
75 MHz
PCI CPU CLK/2
33 MHz
12v Flash ROM
5v Flash ROM
Clock Multiplier
1.5/3.5
2x
2.5x
3x
CPU Core Voltage
3.5v
3.2v
2.9v
2.8v
2.5v
P55C (Dual voltage CPU)
P54C (Single Voltage CPU)
459
460
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
V
Vanilla
VAN3S33A-2NW
386SX-33 Processor Board
Switch
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
Position
On
Off
On
On
On
On
1-2
2-3
2-3
1-2
2-3
Function
Colour
Mono
Enable Bus Mouse IRQ5
Enable Bus Mouse IRQ4
Enable Bus Mouse IRQ3
Enable Bus Mouse IRQ9
Onboard battery
Clear CMOS
Select EPROM
Select bus mouse enabled
Select bus mouse disabled
J1
Jumper
1-4
11-15
7 & 17
8 & 18
9 & 19
10 & 20
Function
Speaker
Power LED/Keyboard
Turbo switch
Turbo LED
Reset
HD LED
Colourtron
Jumper
1
2
3
Position
On
On
Off
On
Function
IRQ9 enable
0 wait state
1 wait state
Enable card
462
The PC Engineer’s Reference Book – Vol 2: Motherboards
Vextrec
www.vextrec.com
Victor
V286D
Switch
E1-2
E3-4
E5-6
E7-8
E9-10
E14-15
E15-16
E17-18
E19-20
E20-21
E22-23
E23-24
E31-32
E32-33
Position
In
Out
In
In
Out
In
In
In
In
Out
In
In
In
In
In
In
In
Function
Slim Add-PAK Receiver PCB is Master
Slave
PDiag
Pulldown resistor
RTC/RAM Normal operation
Clear
2 32K x 8 BIOS EPROMs
Enable onboard video
Disable onboard video
Standard/no video interrupt
Video IRQ9
VGA BIOS AT Mode
VGA BIOS PS/2 Mode
VGA analogue or multisync monitor
Non-standard multi-frequency monitor
Disable HD LED
Enable HD LED
V286M
Backplane board
Switch
A
B
C
JB1
JB2
J5
J6
Position
In
Out
Out
1-4 Out
2-3 Out
1-8 In
2-7 In
3-6 In
4-5 In
1-2 In
2-3 In
1-2 In
2-3 In
Function
External Hercules/CGA
Onboard VGA
Reserved
Reserved
Reserved
Reserved
Enable COM1
Enable COM2
IRQ4 for COM1
IRQ5 for COM2
Parallel port is primary port
Parallel port is secondary port
Primary parallel port interrupt selected
Secondary parallel port interrupt selected
Position
On
On
Off
On
On
Off
On
On
Off
On
Function
Enable parallel port
Parallel port is LPT1
Parallel port is LPT2
Enable serial port
Serial port is COM1/3 (affects I/O port)
Serial port is COM2/4 (affects I/O port)
Disable ext parallel port (bidirectional mode)
Primary FD address 3F0-3F7
Secondary FD address 370-377
Enable IDE type drive port
V386DSX
Switch
S1
S2
S3
S4
S5
S6
S7
V
Switch
S8
Position
On
Off
E1-E2
E5-E6
E7-8
E8-9
E10-11
E11-12
E13-14
E14-15
E16-17
E17-18
E19-20
E20-21
E22-23
E23-24
E25-26
E26-27
E28-29
E29-30
Function
Primary IDE port address 1F0-1F7 for CS0, 3F6-3F7 for CS1
Secondary IDE port address 170-177 for CS0, 376-377 for CS1
256K (32K x 8) BIOS
Reserved
Colour video
Mono
Indicator on with power, half bright during IDE activity
Indicator on with power only
LPT IRQ5
LPT IRQ7
COM1 IRQ4
COM2 IRQ3
Enable onboard video
Disable
Disable video IRQ 9
Enable
Non-standard multi-frequency monitor installed
VGA or standard
Serial port is COM3 or COM4
Serial port is COM1 or COM2
V386M/33
CPU Card
Switch
JB1
J14
Position
1-6 In
2-5 Out
3-4 In
1-2
2-3
Function
Reserved
Out-Disables looped manufacturing data
Colour display Out=mono
IDE responds to primary HD address
IDE responds to secondary HD address
Position
1-4 Out
2-3 Out
1-8
2-7
3-6
4-5
1-2
2-3
1-2
2-3
Function
Reserved
Reserved
Enable COM1
Enable COM2
COM1 IRQ4
COM2 IRQ5
Parallel port is LPT1
Parallel port is LPT2
Primary LPT IRQ
Secondary LPT IRQ
Backplane
Switch
JB1
JB2
J5
J6
V386MW/33
CPU Card
Switch
JP1
Position
1-2
2-3
Out
Function
Primary IDE address
Secondary IDE address
No IDE
Reserved (all out)
Position
1-8
2-7
Function
Enable COM1
Enable COM2
JP2
Backplane
Switch
JB1
463
464
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
J13,14
Position
3-6
4-5
1-2
2-3
Function
COM1 IRQ4
COM2 IRQ3
Enable LPT1
Enable LPT2
V386MWX/20
CPU Card
Switch
JB2
JB3
J4
J12
J13
Position
1-6 In
3-4 In
1-10
2-9
Out
Out
In
In
4-7
5-6
1-2
Out
In
Out
All Out
3-8
Out
In
Out
In
Function
Reserved
Reserved
Out=1024x768 NI In=1024x768 Interlaced
800x600 setting
16 colour @ 72 Hz, 256 @ 60 Hz
16/256 @ 60 Hz
16 @ 72 Hz, 256 @ 56 Hz
16/256 @ 56 Hz
Out=AT VGA mode In=PS/2 VGA
Out=Other monitor timing In=Multisync 1 timing
Onboard speaker
Speaker connector
Onboard video
Other VGA
For piggyback VGA board
Backplane
Switch
JB1
J13,14
Position
1-8
2-7
3-6
4-5
1-2
2-3
Function
Enable COM1
Enable COM2
COM1 IRQ4
COM2 IRQ3
Enable LPT1
Enable LPT2
Position
In
Out
Out
Function
External Hercules/CGA
Onboard VGA
Reserved
Position
1-4 Out
2-3 Out
1-8 In
2-7 In
3-6 In
4-5 In
1-2 In
2-3 In
1-2 In
2-3 In
Function
Reserved
Reserved
Enable COM1
Enable COM2
COM1 IRQ4
COM2 IRQ3
Parallel port primary address
Parallel port secondary address
Primary LPT IRQ
Secondary LPT IRQ
V386MX
CPU Card
Switch
A
B,C
Backplane
Switch
JB1
JB2
J5
J6
V
V486M/33
CPU Card
Switch
JB1
J8
J9
J18
J19
J20
J21
Position
1-6
3-4
1-2
Out
1-2
2-3
Out
In
1-2
2-3
Out
In
Out
Function
Reserved
Reserved
Onboard speaker
Speaker connector
Reset
486SX
486DX/487SX
486SX
486DX/487SX
486DX
487SX
486SX
Onboard video
External video
Backplane
Switch
J7
J8
J9
J10
J11
JB1
JB2
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-4
2-3
1-8
2-7
3-6
4-5
Function
ADD-PAK lock I/O address
LPT1 IRQ7
LPT2 IRQ5
LPT1 chip select
LPT2 chip select
Parallel port mode
HD primary port I/O select
HD secondary port I/O select
Floppy precompensation value
Floppy drive type
COM1 selected
COM2 selected
Enable IRQ4
Enable IRQ3
V486M/50
CPU Card
Switch
JB1
J4
J8
J18
J19
J20
J21
Position
1-6
3-4
1-2
Out
1-2
2-3
Out
In
1-2
2-3
Out
In
Out
Function
Reserved
Reserved
Keyboard lock
Onboard speaker
Speaker connector
486SX
486DX/487SX
486SX
486DX/487SX
486DX
487SX
486SX
Onboard video
External video
Backplane
Switch
J7
Position
Function
ADD-PAK lock I/O address
465
466
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
J8
J9
J10
J11
JB1
JB2
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-4
2-3
1-8
2-7
3-6
4-5
Function
LPT1 IRQ7
LPT2 IRQ5
LPT1 chip select
LPT2 chip select
Parallel port mode
HD primary port I/O select
HD secondary port I/O select
Floppy precompensation value
Floppy drive type
COM1 selected
COM2 selected
Enable IRQ4
Enable IRQ3
V86M
CPU Card
Switch
JB1
Position
1-16
In
In
Out
Out
3-14
In
In
Out
Out
5-12 In
5-12 Out
6-11
In
Out
Out
8-9
2-15
In
Out
In
Out
4-13
In
Out
In
Out
7-10
In
In
Out
Function
Floppy A
360 K
1.2 Mb
720 K
1.44 Mb
Floppy B
360 K
1.2 Mb
720 K
1.44 Mb
1 floppy
2 floppies
HD select
No IDE
1st IDE
2nd IDE
Reserved
Backplane
Switch
JB1
JB2
J5
J6
Position
1-4 Out
2-3 Out
1-8 In
2-7 In
3-6 In
4-5 In
1-2
2-3
1-2
2-3
Function
Reserved
Reserved
Enable COM1
Enable COM2
COM1 IRQ4
COM2 IRQ3
Parallel port is primary
Parallel port is secondary
Primary parallel port IRQ
Secondary parallel port IRQ
V486MWX/20
CPU Card
Switch
JB1
J4
J8
J9
J18
Position
1-6
3-4
1-2
Function
Reserved
Reserved
Keyboard lock
Speaker connector
Reset
486SX
V
Switch
J19
J20
J21
Position
2-3
Out
In
1-2
2-3
Out
In
Out
Function
486DX/487SX
486SX
486DX/487SX
486DX
487SX
486SX
Onboard video
External video
Position
1-8
2-7
3-6
4-5
1-2
2-3
Function
COM1 selected
COM2 selected
Enable IRQ4
Enable IRQ3
Enable LPT1
Enable LPT2
Backplane
Switch
JB1
J13,14
V486MX/20
CPU Card
Switch
JB1
J4
J8
J9
J18
J19
J20
J21
Position
1-6 In
3-4 In
2-5 Out
1-2
2-3
Out
In
1-2
2-3
Out
In
Out
Function
Reserved
Reserved
Reserved
Keyboard lock
Onboard speaker
Speaker connector
Reset
486SX
486DX/487SX
486SX
486DX/487SX
486DX
487SX
486SX
Onboard video
External video
Position
1-8
2-7
3-6
4-5
1-2
2-3
Function
COM1 selected
COM2 selected
Enable IRQ4
Enable IRQ3
Enable LPT1
Enable LPT2
1-2
Out
Backplane
Switch
JB1
J13,14
V486MX/25
As for V486MWX/20
Vision Top
Award BIOS ID
The last two numbers of the BIOS part number.
467
468
The PC Engineer’s Reference Book – Vol 2: Motherboards
Code
9C
BC-00
Motherboard
VT586-2/TX
S7-MVP3
Code
CG-00
Motherboard
S7-MVP3
Vobis
VTech
(847) 215 9806
www.pcpartner.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1C
9C
9C-00
DC
DC-00
EC-00
Motherboard
MP5-TRI
MP5-TRI
MB540N
HIS P6EX4-A3
VIB804DSE
MB520NH
Code
KC
LC
HC
KC
LC
MB 520NH
Aristo AM 439VX
MB540N
Aristo AM 430TX/Yellow Dragon TX
VIB804DSE
Same as Digimate T5DX-VPX2E
VTI
See Vextrec
Motherboard
MB500N
Platinum NSV/NST/NSP
MP5-TRI
MB500N
MB500N
W
Walters International
325S
Switch
J1
J2
J3
J4
J5-8
J9
J10
J11
J12
Position
In
Out
1-2
In
Out
In
Out
1-2
2-3
In
Out
J13
J14
Function
Enable external battery
Disable
Reserved
Colour monitor
Mono
8042 speed control pin
Normal for 325S
Normal for 325SC
32K cache
64K cache
Power LED/Keylock
Turbo LED
High speed
Low speed
Speaker
Reset
333S
As for 325S
333SC
As for 325S
MB1212C
Switch
J1
J2
Position
1-3
4-5
Function
Power LED
Keyboard LED
Speaker
470
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
JP1
JP2
JP3
JP4
JP6
JP7
Position
1-2
2-3
1-2
2-3
1-2
2-3
Function
Turbo LED
Reset Switch
Turbo switch
Processor CLK
External CLK
MGA monitor
CGA/EGA/VGA
External power
Internal power
200BE
Switch
JP3-8
J5
J6
J7
J18
J19
J24
J25
J30
JPG
SW1
Position
1-3
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Function
Up to 4 Mb
Up to 8 Mb
High speed LED
CPU display connector
Normal
Reset for chips register setup
Power LED/Keylock
Speaker
External battery
CPU CLK selectable by keyboard
High speed
Reset
Normal
Reserved
Colour monitor
Mono
120/160BE
As for 200BE
160A
Switch
J2
J3
J5
J6
J7
Position
1-2
2-3
1-2
1-2
2-3
1-2
2-3
J16
J17
J18
Function
CPU CLK selectable by keyboard
16 MHz
High speed LED
Colour monitor
Mono
Reset
Normal
Reset for chips register setup
Power LED/Keylock
Speaker
External battery
120/160B
As for 160A
ELT 325P
Switch
SW1
Position
1-2
2-3
Function
Mono display
Colour
W
Switch
JP3,4
J5
J18
J19
J24
J25
J30
J32
Position
JP3
2-3
1-2
JP4
1-2
2-3
In
Out
In
Out
Function
Memory
Bank 0,1 onboard, Bank 2,3 on card
Bank 0,1 onboard or on card
Turbo LED
Power LED/Keylock
Speaker
External battery
Turbo switch set low
Turbo switch set high
Reset
CPU pipeline
Non-pipeline
ELT 386sx/160D
Switch
JP2,3
J5
J18
J19
J24
J25
Position
JP2
1-2
2-3
JP3
2-3
1-2
1-2
J30
J31
Function
Memory
Card and SIP for base memory
SIP for base memory
LED
Power LED/Keylock
Speaker
External battery
Alt-Ctrl + for high speed
Alt-Ctrl – for low speed
Reset
ESDI, Token Ring Compatible Jumper
Warpspeed
www.warpspeedinc.com
Western Digital
www.wdc.com
Faraday Bus PC
Switch
JU1
JU1-4
JU1
JU2-1
JU2-2
JU 2-3
Position
1
In
In
Out
Out
In
Out
5
In
Out
In
Out
In
Out
In
Out
2
In
Out
In
Out
6
Out
In
Function
Monitor Type
Disabled
80 x 25 graphics
40 x 25 graphics
Mono
Enable COM1 RS422 transmitter
Enable software control COM1 RS422 transmitter
EPROM
27256
2764, 27128
Disable COM1
Enable
Disable COM2
Enable
Enable LPT1
Disable
471
472
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
JU2-4,5
JU2-6,7
JU2-8
Position
4
In
Out
6
In
Out
In
Out
5
Out
In
7
Out
In
J2
J3
J4
J5
J6
J7
J8
J9
Function
EPROM
27256
2764, 27128
COM1
RS422 RCV
RS232 RCV
RS422 terminator COM1
No Terminator
RS232/422
RS232
Parallel port
Reset
Speaker
6 pin keyboard connector
9 pin keyboard connector
NMI port
Faraday FE6400
SW1
Switch
1,7,8
3,4
5,6
Position
1
On
Off
Off
Off
Off
Off
5
On
Off
On
Off
7
On
On
Off
On
Off
8
On
On
On
Off
Off
6
On
On
Off
Off
Function
Floppy Drives
0
1
2
3
4
Reserved
Monitor Type
None
40x25
80x25
Mono
SW2
Switch
1-4
J17
5-9
Position
4
On
On
On
On
On
On
On
On
Off
Off
Off
Off
Off
Off
Off
Off
9
In
Out
Out
5
Off
3
On
On
On
On
Off
Off
Off
Off
On
On
On
On
Off
Off
Off
Off
10
Out
In
In
6
On
2
On
On
Off
Off
On
On
Off
Off
On
On
Off
Off
On
On
Off
Off
11
In
In
Out
7
On
1
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
12
Out
Out
In
8
On
9
Off
Function
Memory Size
64K
96K
182K
160K
192K
224K
256K
288K
320K
352K
384K
416K
448K
480K
512K
640K
Base Memory
65K
128K
256K
Baud
75 (1-5,6 must be on)
W
Switch
J17-13
SW1-2
J2
J3
Position
On
Off
On
Off
On
Off
On
Off
On
Off
J17-13
Out
In
Off
Off
On
On
Off
Off
On
On
Off
Off
SW1-2
Off
On
On
On
Off
Off
Off
Off
On
On
On
On
On
On
On
On
On
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
In
Out
J5
J14
J15
J16,18
Function
110
134.5
150
300
600
1200
2400
4800
9600
19200
Coprocessor
8087 installed
Not installed
Disable UART
Disable EPROM
Enable
NMI control
Reset
Speaker
Keyboard connectors
J17
EPROM 0
1
In
Out
Out
2
Out
In
In
3
In
In
Out
EPROM 1
4
Out
Out
In
5
In
Out
Out
6
Out
In
In
Faraday FE641x
Switch
V1,2
JU1-1
2
3
4
5
7,8
J10
J11
J12,13
J14
J15
J16
J17
J18
Position
V-1
In
Out
In
Out
V-2
In
In
Out
Out
In
Out
In
Out
In
Out
In
Out
7
Out
Out
In
8
In
In
Out
Function
Monitor Type
Disabled
40 x 25 graphics
80 x 25 graphics
Mono
Reserved
Enable LPT1
Disable
Enable COM1
Disable
Enable 256K base memory
64K
Enable EPROM
Disable
EPROM Type
2764
27128
27256
Power Connector
Reset
Keyboard
Speaker
Floppy
RS232
LPT
NMI
EPROM
7
In
In
Out
8
Out
Out
In
Type
2716
2732
2764/27128
473
474
Switch
J21
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Function
Mono port
Faraday FE642x
Switch
J2
J3
J4
J9
J10
J11
J12,13
J15
J16,17
J18
J19
SW1
1,2
Position
Out
In
Out
In
Out
In
S1
In
Out
In
Out
S2
In
In
Out
Out
Function
64K RAM
256K RAM
27256 EPROM
27128, 2764
27128, 2764
27256
LPT
Power
Reset
Keyboard
Onboard floppy
Serial ports
Speaker
NMI
Monitor Type
Disabled
40 x 25 graphics
80 x 25 graphics
Mono
Faraday Micro PC/CMOS
Switch
JU1
1,2
JU2
1,2
Position
1
Out
In
In
1
In
In
Out
Out
2
Out
Out
In
2
In
Out
In
Out
J2,3
J4
J5
J6
Function
EPROM Type
2764, 27128
27256
27512
Monitor Type
Disabled
80 x 25 graphics
40 x 25 graphics
Mono
Keyboard
Speaker
Reset
NMI
Faraday A-Tease
Switch
JF5
3,4
JF1-6
JF1-7
JF1-8
JF2-1
JF2-2,3
Position
3
Out
In
In
Out
In
Out
In
Out
In
Out
2
In
Out
4
In
Out
3
Out
In
Function
EPROM Size
27128
27256
Disable COM1
Enable
Disable COM2
Enable
Enable LPT1
Disable
Enable COM1 RS422 Xmitter
Software control
COM1 RS232 Receiver
COM1 RS422 Receiver
W
Switch
JF2-4
JF2-5
JF2-6,7
JF2-8
JF3-4
JF3,5-7
JF3-8
JF4-1
Position
In
Out
In
Out
6
In
Out
In
Out
In
Out
Function
COM1 RS422 Terminator In
Out
Enable COM2 RS422 Receiver
Software control
7
Out
In
Out
In
Out
In
COM2 RS422 Receiver
COM1 RS232 Receiver
COM2 RS422 Terminator In
Out
Maintenance Mode
Normal
User defined – may be read by software
AT keyboard
PC keyboard
Mono adapter
CGA
JF1,JF5
JF1-2
Out
In
In
In
JF1-3
In
Out
Out
Out
JF1-4
Out
Out
In
In
JF1-5
In
In
Out
Out
JF5-1
Out
Out
Out
In
WD286-LPM
Switch
W3
W4
W5
W9
W11
W12
W15
W16
Position
1-2
2-3
1-2
2-3
1-2
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
W17
J6
J15
Function
Mono
CGA
Disable onboard floppy
Enable
Reserved
16/12.5 MHz 80C287maths copro
6 MHz 80287
Disable onboard VGA
Enable
Disable IDE LED
Enable
Enable IRQ9
Disable
Enable PS/2 IRQ12
Disable
Reserved
Reset
Key switch/IDE
WD286-WDM2
Switch
W1
W3
W4
W5
W6
W7
W8
W10
Position
In
In
Out
In
Out
1-2
In
Out
Function
Enable MFM HD LED
Enable HD controller chip select
Reserved
HD controller IRQ14
Reserved
Reserved
Floppy IRQ6
IDE IRQ14
JF5-2
In
In
In
Out
Type
2716
2732
2764/27128
27256
475
476
Switch
W11
W12
W13
W17
W18
W19
W20
W21
W22
The PC Engineer’s Reference Book – Vol 2: Motherboards
Position
Out
Out
In
In
In
Out
In
In
In
In
Out
Function
Disable IDE LED
AT keyboard
XT keyboard
Enable video IRQ9
Enable PS/2 mouse IRQ12
Colour display
Mono
LPT IRQ7
COM2 IRQ3
COM1 IRQ4
IDE Chip select
WD286-WDM20
Switch
W3
W4
W5
W10
W6
W7
W8
W12
W13
W17
W18
W19
W20
W21
W22
W23
W24
Position
In
Out
In
Out
Out
1-2
In
Out
In
In
In
2-3
1-2
In
In
In
Out
In
1-2
2-3
In
Function
Enable HD controller chip select
Reserved
HD controller IRQ14
IDE support IRQ14
Reserved
Reserved
Floppy IRQ6
AT keyboard
XT keyboard
Enable video IRQ9
Enable PS/2 mouse IRQ12
Colour display
Mono
LPT IRQ7
COM2 IRQ3
COM1 IRQ4
IDE Chip select
Enable video NMI
Disable onboard video data buffer
Enable
Enable onboard video display
WD386SX-LPX
Switch
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
Position
In
Out
Out
In
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Function
Enable password memory clear
Disable
Reserved
Reserved
Enable PS/2 mouse IRQ12
Disable
Mono display
Colour
External 8514/A video clock
Onboard VGA clock
Disable onboard VGA
Enable
Fixed frequency monitor
Multi-frequency
PC/AT VGA BIOS
PS/2 VGA BIOS
Enable onboard speaker
Disable
W
Switch
W11
J6
Position
1-2
Function
Disable onboard IDE LED
Reset
Win
Maybe same as below
WinCo Electronic Co
www.winco.com.tw
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
9C-00
Motherboard
P55TV2
WP55VT2D
Code
AC-00
Motherboard
SL 586VT-2/WP55VT-2D
SL586VT-2
Same as Fong Kai SL 586VT-II
Win-Lan
Wintec (Win Technologies)
www.wintec.com. See also Edom
Award BIOS ID
The last two numbers of the BIOS part number.
Code
0-00
9C
AC
BC
FC
Motherboard
MP 046-A
MP 066
MP 071B
MP 070
MP 076
Code
GC-00
HC
JC
NC
TC
Motherboard
MP 082 or 060 Rev A
MP 054
MP 058
MP 058
MP 064
Wyse
WY 1100
Switch
JC4
JC5
JC6
JC7
JC8
R102
P1
P2
P3
J1
J2
Position
Function
Disable video
Disable COM1
Disable COM1 IRQ
Disable LPT1
Disable LPT1
Trace cut for 256K RAM selection
COM1
COM2
LPT1
Keyboard
Video
477
478
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
J12
J13
J14
J16
J17
SW1
Position
Function
Power
Backplane connector
Drive A
Drive B
Multifunction backplane
Reserved
WY 1400
Switch
S1
S2
S3
S4
S5,5
S7,8
W1-4
W5
W6
Position
Off
On
Off
Off
Off
S5
Off
On
Off
On
S7
On
Off
W1
In
Out
In
Out
Out
Out
S6
Off
Off
On
Off
S8
On
On
W2
In
In
Out
Out
W3
In
In
In
In
W4
In
In
In
In
Function
Reserved
No 8087
8087 installed
Reserved
Reserved
Primary Display Mode
Mono
80 column CGA
40 column CGA
EGA
Floppies
1
2
Cyls
Hds
306
2
612
4
306
6
306
4
Reserved
Reserved
WY 2012i
Switch
J10
J17
J28
J30
J31
SW1
1-3
S4
Position
1-2
2-3
1-2
2-3
1-2
2-3
Out
In
Out
In
S1
On
Off
On
On
Off
Function
80 ns RAM
120 ns RAM
Power-on from power supply
Power-on from system board
Internal battery
External battery
S2
Off
Off
On
S3
On
On
Off
Fast ALE timing mode
1 wait state
2 wait states
Total Memory
1 Mb
2 Mb
4 Mb
Colour video
Mono
WY 2108
Switch
WA
WB
WG
Position
1-2
2-3
In
Out
In
Function
640/384K
512/512K
Enable extended memory
Disable
512K RAM
WPC
256
128
128
HD Cap
5 Mb
20 Mb
15 Mb
10 Mb
W
Switch
WH
Position
Out
In
Out
Function
1 Mb RAM
Normal bus master
Not supported
Daughterboard
Switch
W8
W10
W11
W13
J4
WD
Position
In
Out
In
Out
In
Out
In
Out
In
Out
1-2
2-3
Function
Normal oscillator
Text oscillator
128K ROM
256/512K ROM
256/512K ROM
128K ROM
512K ROM
256/512K ROM
Test mode
Normal
Colour display
Mono
WY 2112/2214
Switch
J4,5
J8
J9
J12
J13
J18
WF1-3
J21,22
Position
J4
Out
In
Out
In
Out
In
In
Out
Out
In
Out
WF1
In
Out
Extended J24
In
In
In
In
Out
Out
Out
Out
J5
In
Out
WF2
Out
In
Extended J25
In
In
In
In
In
In
Out
Out
WF3
Out
In
J21
Out
In
Base J6(WB)
In
In
Out
Out
Out
Out
Out
Out
J22
Out
In
Function
BIOS ROM size
256/128K
512K
1 ROM wait state
0 ROM wait state
1 DRAM wait state
0 DRAM wait state
Colour display
Mono
Normal operation
Enable DRAM parity
Disable
80287-10 copro
10 MHz
Unsupported
CPU Board JT(WA)
In
Out
In
Out
In
Out
In
Out
WY 2116i
Switch
J1
J2
J3
Position
In
Out
Out
In
1-2
2-3
Function
256/512K ROM
128K ROM
256/512K ROM
128K ROM
16 MHz CPU
Unsupported
Base
512K
640K
512K
640K
512K
640K
512K
640K
Extended
0
0
512K at 1000000h
384K at 1000000h
512K at 2000000h
384K at 2000000h
512K at 4000000h
384K at 4000000h
479
480
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
J4
J6
J7
J8
J9
J12
J13
J5,14-16
J17
J18,19
WA
WB
WD
WC,E,F
J10
Position
Out
In
In
Out
In
Out
Out
In
In
Out
1-2
2-3
Out
In
J5
In
Out
1-2
2-3
2-3
1-2
Out
In
Out
In
In
Out
WE
In
Out
J14
Out
In
J15
In
Out
J16
2-3
1-2
WC
Out
In
J10
Out
In
WF
Out
In
Function
512/640K base memory
256K base memory
0 RAM wait state
1 RAM wait state
0 ROM wait state
1 ROM wait state
0 ROM wait state
2 ROM wait state
Enable parity
Disable
Masked keyboard scanner chip
Ceramic
Normal
Test
RAM size
1 Mb
¼ Mb
Reserved (normal)
Reserved
211003-02 LB ASIC revision
211008-01 LB ASIC revision
640 K base memory
512K base memory
Move split memory
Disable
Colour video
Mono video
80287-10 copro
10 MHz
Unsupported
WY 2200
Switch
W1-5
W6
W7
W30
SW1
Position
W1
In
Out
Out
Out
In
In
Out
Colour
Mono
W100
J17
J19
J24
W2
Out
In
Out
W3
Out
Out
In
W4
Out
Out
In
W5
In
In
Out
Function
EPROM
2764
27128
27256
Reserved
Disable 14.318 MHz oscillator
Enable
640K onboard RAM
Disable 512-640K for 128K plug-in cards
Colour display
Mono
Reserved
Keyboard
Battery
Dual speed oscillator
WY 3116sx
Processor Board
Switch
W1
WA/WB
Position
Out
In
In
Out
Function
Keyboard controller chip set at 250646-XX
Keyboard controller chip set at 250230-12
Normal
Reserved
W
Switch
WC
WD
WQ,E
WF
WG
WJ
WK
WL
Position
1-2
2-3
2-3
1-2
WQ
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
2-3
1-2
1-2
2-3
Function
512/256K BIOS
128K BIOS
128/256K BIOS
512K BIOS
WE
In
Out
Normal
Reserved
Normal
Reserved
Colour Display
Mono
No maths copro
80387SX-16 Installed
Keyboard controller chip set at 6805
Keyboard controller chip set at 68705
2 BIOS chips
1 BIOS chip
WY 3216
Processor Board
Switch
WA
WB
WF
WG
L/R
WC
WD
Position
1-2
2-3
2-3
1-2
1-2
2-3
2-3
1-2
1-2
2-3
2-3
1-2
2-3
1-2
1-2
2-3
1-2
2-3
Function
512/256K BIOS
128K BIOS
128/256K BIOS
512K BIOS
No 80387-16
80387-16 installed
No 80287-10 or 80387-16
80287-10 and 80387-16 instaled
Normal
Reserved
No 80387-16
80387-16 installed
Static column memory
Unsupported memory
Normal
Reserved
Colour Display
Mono
WY 3225
Processor Board
Switch
WA,B,V
WC
WD
WE
WF
WG
Position
In
Out
1-2
2-3
2-3
1-2
In
Out
1-2
2-3
2-3
Function
Normal
Reserved
512/256K BIOS
128K BIOS
128/256K BIOS
512K BIOS
Enable RAM parity
Disable
Normal
Manufacturing test
Colour Display
481
482
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
WH
WI
WJ
WK
WL
WM
WN
WU/T/S
R/P/Q
J5
Position
1-2
In
Out
Out
In
In
Out
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
In
Out
Function
Mono
Normal
Reserved
Normal
Reserved
No 80387
80387 Installed
Normal
Reserved
Enable Hidden Refresh
Disable
Normal
Reserved
Normal
Reserved
1 chip keyboard scanner
2 chips
Connector for serial/parallel interface board
WY 386sx/16
Switch
JP3
JP4
JP5
JP6
JP8
JP10
JP11
JP13
Position
2-3
1-2
1-2
2-3
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
Function
Disable onboard IRQ2
Enable
Enable onboard FD controller
Disable
PS/2 mouse
Serial mouse
Enable onboard video controller
Disable
Mono monitor
Colour
LPT1 IRQ7
LPT1 IRQ5
COM1 IRQ4
COM1 IRQ3
36 MHz VGA clock
VGA feature clock
WY 386sx/20
Switch
JP1
JP5
JP6
JP7
J1
J2
J3
J4
J5
Position
1-2
2-3
1-2
2-3
1-2
2-3
2-3
1-2
Function
20 MHz
16 MHz
Colour video
Mono
Internal battery
External battery
Power good from power supply
From system board
Reset
Keylock/Power LED
Speaker
Speed button
Speed LED
W
Decision 386/25
Switch
JMP1
JMP3
JMP4
JMP6
Position
In
Out
Out
In
2-3
1-2
2-3
1-2
J9
J13
J14
J15
J16
J12
Function
Colour video
Mono
Disable Diagnostic Select
Enable
Disable CMOS discharge
Enable
64K cache
128K cache
External battery
Keylock/Power LED
Speaker
Turbo switch
Reset
Speed LED
Decision 486
Switch
W1
W2
W3
W4
J2
J3
J12
J13
J14
J15
J16
Position
2-3
1-2
Out
Function
Colour Display
Mono
Reserved
Reserved
Reserved
Keyboard
Battery
Reset
Turbo button
Turbo LED
Speaker
Power LED
Decision 486-33(T)
As for Decision 486
483
484
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
Y
Yamashita
Yellow Dragon
EFA?
Award BIOS ID
The last two numbers of the BIOS part number.
Code
9C
Motherboard
P5TX-AT
Code
9C-00
Motherboard
TX Board
TX Board
Vtech/PC Partner MB540N/Aristo AM 430TX
Yukon
Award BIOS ID
The last two numbers of the BIOS part number.
Code
DC
Motherboard
P54C
Code
Motherboard
486
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards
Z
Zenith Data Systems
BM 200
Revisions 1 & 2
Switch
ST2
ST3
ST4
ST5
ST6
ST7-9
ST10
ST11
ST12
ST13
ST14
ST15
ST16
Position
In
Out
In
Out
In
Out
In
Out
In
Out
ST7
In
In
Out
In
In
Out
In
Out
In
Out
In
Out
In
Out
In
Out
ST8
In
In
In
Out
ST9
In
Out
Out
In
Function
0 WS read, 1 WS write RAM
1 WS read, 1 WS write RAM
1 WS ROM
2 WS ROM
12 MHz, fast mode
8 MHz, normal mode
8 MHz bus
6 MHz bus
48 MHz system clock connected
Disconnected
Memory
2 x 256K
512K
4 x 256K
1 Mb
2 x 1 Mb
2 Mb
4 x 1 Mb
4 Mb
80/100 ns RAM
27512 ROM
27256 ROM
Colour display
Mono
Enable video I/O
Disable
1.8432 MHz clock connected
Disconnected
Enable 36 MHz VGA clock
Disable
Enable 25.175 MHz VGA clock
Disable
488
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
ST17
ST19
ST20
ST21
ST22
ST23
ST24,25
ST26-33
ST34
ST35
ST36,37
ST38
ST39
ST40
ST41
ST42
ST43
ST44
ST45
ST46
ST47
ST48-53
ST54
ST55
ST56
Position
In
Out
Out
Out
Out
In
Out
In
Out
ST24
Out
In
Out
In
In
In
Out
In
Out
In
Function
Enable 28.322 MHz VGA clock
Disable
Reserved
Reserved
Reserved
16-bit BIOS ROM data
ST25
Out
In
In
Out
In
Out
In
In
In
Out
In
Out
In
Disable VGA BIOS
Enable
9 pin
25 pin
370-377h
COM2
LPT2
COM2
COM1
390-397h
COM1
LPT1
COM2
COM1
Default port address
187ns floppy precomp
125ns
DRQ2 from floppy interface
Disconnected
Default clocks
120/150ns DRAM
IRQ3 on COM2
IRQ3 disconnected
Ground to 0v link
16-bit video memory access
IOCHRDY connected for HD
Disconnected
Enable VGA memory
Disable
IRQ14 only
IRQ14 + ACTDISK
LPT IRQ15
LPT IRQ7
COM2 Handshake signal definition
Leave connected
Leave disconnected
Not assigned
BM 400 MCA
Switch
SW1,2
SW3
Position
SW1
On
On
Off
Off
On
SW2
On
Off
On
Function
Volume
0%
50%
100%
Boot from diskette
Disable diskette boot
BM 500 MCA
As for BM400 MCA.
BM 600
Revisions 1 & 2
Switch
JP6-8
Position
2-3
1-2
Function
Coprocessor not installed
Installed
Parallel
LPT1
LPT2
Z
Switch
JP12
JP13-16
Position
1-2
2-3
JP13
2-3
2-3
1-2
2-3
1-2
1-2
JP14
2-3
2-3
1-2
2-3
1-2
1-2
JP15
1-2
1-2
1-2
1-2
2-3
2-3
JP16
1-2
1-2
1-2
1-2
2-3
2-3
Function
Relocate to FA0000-FDFFFF
Do not relocate
Type
Block
RAM
512*9
A
2 Mb
512*9
A+B
4 Mb
512*9
A
6 Mb
1 Mb*9
B
4 Mb
1 Mb*9
A
4 Mb
1 Mb*9
A+B
8 Mb
SW1
Switch
S1-8
Position
S1 & 4 On, others off
Function
EPROM & I/O overlap – do not change
SW2
Switch
S1
S2
S3
S4
S5-7
S8
S9
S10
JP13-16
Position
On
Off
On
Off
On
Off
On
Off
Off
On
Off
On
Off
On
On
Off
JP13
2-3
2-3
1-2
JP14
2-3
2-3
1-2
JP15
1-2
1-2
1-2
Cheetah
Same as Packard Bell PB 680.
Z148XT
SW 402
Switch
8MDS
8087
60 HZ
PRDS
S1
S2
S3
S4
Position
On
Off
On
Off
On
Off
On
Off
On
On
On
On
Function
Disable 8 MHz
Enable (front panel switch)
Copro not installed
Installed
60 Hz video refresh
50 Hz video refresh
Disable parity checking
Enable
1 WS (4.77 MHz only)
2 WS
3 WS (4.77 + 8 MHz)
4 WS
JP16
1-2
1-2
1-2
Function
25-pin=COM1, 9-pin=COM2
Other way round
Disable COM1
Enable
Disable COM2
Enable
Disable LPT1
Enable
Printer port=LPT1
Printer port=LPT2
BIOS in RAM
ROM BIOS
Mono display
Colour
Disable 2nd SIMM (B) Block
Enable
Memory
2 Mb Bank A
2 Mb Bank A + B
2 Mb Bank A, 4 Mb Bank B
489
490
The PC Engineer’s Reference Book – Vol 2: Motherboards
Switch
S5
Position
On
Function
5 WS
SW 403
Switch
FLIN
2/1D
BTFL
BTWC
Position
On
Off
On
Off
BTFL
On
Off
Off
BTWC
Off
On
Off
Function
No floppy
1 or more floppies
1 floppy
2 floppies
Boot Sequence
HD
Floppy
Manual from monitor
Z386/16 AT
Revisions 1 & 2
Switch
J201
J202
J204
J207
J211
Position
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
80387 Type
80287-10
80287-8
80387-16
Function
80387 synchronous
80387 asynchronous
80287
80387
No coprocessor
Coprocessor installed
1 Mb memory card
1 Mb memory card not used
Low speed coprocessor
High speed coprocessor
J201
2-3
2-3
2-3
J202
1-2
1-2
2-3
J204
2-3
2-3
2-3
J211
2-3
1-2
2-3
Z-Station Campus
Same as Packard Bell PB 640.
Z-Station 510
Same as Packard Bell PB 470 (Thanks to Rudd Thornton).
Zida Technologies
Zida Technologies (Tomatoboards)
www.zida.com
Award BIOS ID
The last two numbers of the BIOS part number.
Code
1C-00
9C
9C-00
Motherboard
Tomato 4DPS-256K
5DHX (Tomato) rev 1.2
Tomato 5DVX
Code
BC-00
CC
DC-00
Motherboard
Tomato 5DTX
Tomato 5DVX
Tomato 5STX
Connectors
Here are typical pinouts for a typical clone motherboard – yours may be different!
Power LED and Keyboard Lock
Usually a 5-pin keyed BERG strip, which means one jumper is missing at the Power LED end
Pin
1
2
3
4
5
Description
LED Power
Key (No Connection)
Ground
Keyboard Lock
Ground
Reset
2-pin BERG strip
Pin
1
2
Description
Ground
Reset Input
Turbo LED
2-pin BERG strip
Pin
1
2
Description
LED Anode
LED Cathode
Speaker
4-pin keyed BERG strip for an external 2-inch, 8-ohm speaker
Pin
1
2
3
4
Description
Speaker Data Out
Ground
Ground
+5 VDC
HD Activity LED
4-pin keyed BERG strip
Pin
1
Description
LED Anode (+)
492
The PC Engineer’s Reference Book – Vol 2: Motherboards
Pin
2
3
4
Description
LED Cathode (-)
LED Cathode (-)
LED Anode (+)
Keyboard
5-pin, circular-type DIN socket, or 6-pin Mini-DIN.
Pin
1
2
3
4
5
Description
Clock Signal
Data Signal
Not Used
Ground
+5V Fused VDC
Pin
1
2
3
4
5
6
Description
Data Signal
Reserved (N/C)
Ground
+5Volt DC
Clock signal
N/C
Power Supply (PS8 and PS9)
6-pin AT standard power connectors. Most power supplies have two six-wire connectors, two of
the wires on each connector are black. Align the two black wires on each connector in the
middle.
Pin
1
2
3
4
5
6
Connector PS8
Power Good
+5 VDC
+12 VDC
-12 VDC
Ground
Ground
Connector PS9
Ground
Ground
-5 VDC
+5 VDC
+5 VDC
+5 VDC
Parallel Port
2x13-pin male header.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
Description
STROBE
Data Bit 0
Data Bit 1
Data Bit 2
Data Bit 3
Data Bit 4
Data Bit 5
Data Bit 6
Data Bit 7
ACK
BUSY
PE
SLCT
Pin
14
15
16
17
18
19
20
21
22
23
24
25
26
Description
AUTO FEED XT
ERROR
INIT
SLCT IN
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
No Connection
Pinouts
Serial Port
2x5-pin male headers, may be wired in one of two ways. The first arrangement is more modern.
1
3
5
7
9
2
4
6
8
10
1
2
3
4
5
6
7
8
9
10
Pin
1
2
3
4
5
Description
Carrier Detect (CD)
Transmit Data (TXD)
Signal Ground
Request To Send (RTS)
Ring Indicator (RI)
Pin
1
2
3
4
5
Description
Carrier Detect (CD)
Receive Data (RXD)
Transmit Data (TXD)
Data Terminal Ready (DTR)
Signal Ground
Pin
1
2
3
4
5
6
Description
Mouse Data Signal
Reserved (N/C)
Ground
+5Volt DC
Mouse Clock signal
N/C
Mouse
Pin
6
7
8
9
10
Description
Receive Data (RXD)
Data Terminal Ready (DTR)
Data Set Ready (DSR)
Clear To Send (CTS)
No Connection
Pin
6
7
8
9
10
Description
Data Set Ready (DSR)
Request To Send (RTS)
Clear To Send (CTS)
Ring Indicator (RI)
No Connection
493
494
Notes
The PC Engineer’s Reference Book – Vol 2: Motherboards

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