Build a GameBoy Color programming cartridge with MBC5 chip and

Build a GameBoy Color programming cartridge with
MBC5 chip and AM29F032B-90SD flash chip. © 2008 by Reiner Ziegler
First, buy a cartridge with ROM+MBC5+RAM+BAT. For more details about MBC5 cartridges take a
look into http://www.reinerziegler.de/gbcmbc.txt.
I bought a Zelda cartridge with 32K RAM. With this large RAM you can play nearly all GBC games.
Second, buy the 29F032B-90SD flash chip from www.spoerle.com or from www.jameco.com.
Remove the ROM chip (MX23C8005) carefully
with a sharp cutter.
40-Pin TSOP
package
44-Pin package
32-Pin package
44-Pin SO
package
AM29F032BSEC
LH538 ROM AM29F032BxxEx (x =
KM23C16120 / Macronix
xxSD (x =
don't care)
ROM
MX23C8005 don't care)
Pin 1
After that, solder 5 cm wires on each pin,
except pin 5, 6, 7, 8.
Cover all pin’s (except pin 5, 6, 7, 8) with a
piece of tape and solder the AM29F032B-90SD
with pin 7, 8, 9, 10 directly to these 4 pin’s.
Pin
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
37
38
39
40
Pin
2
3
34
35
36
37
38
39
12
23
Cart Pin 30
40
41
42
4
5
6
7
8
9
10
11
31
15
17
19
21
13
32
23
24
26
28
30
14
Cart Pin 3
44
43
Pin
1
31
30
2
3
29
28
4
22
32
Cart Pin 30
25
23
26
27
5
6
7
8
9
10
11
12
13
14
15
17
16
16
32
18
19
20
21
24
Cart Pin 3
MBC5-RA21
MBC5-RA20
Pin table for ROM chips and FLASH chips
Cart Pin 3 = /WR
= WE#
Cart Pin 30 = /RESET = MBC5-/RESET
The tape is necessary to avoid any short
between the PCB pin’s and the flash chip.
Pin
35
36
37
38
39
40
41
42
43
23
2
3
4
5
6
7
8
9
10
13
14
15
16
17
18
19
20
21
22
44
24
25
26
27
29
30
31
32
remove old chip
MX23C8005
add new AM29F032B-90SD
flash memory chip
Connect the AM29F032B-90SD pin’s to the corresponding pin’s described inside the pin table for
ROM chips and FLASH chips.
Try not to cross to much wires over the flash chip, there is not enough place for doing that. Try to use
thin wires. I always use wrap wires for this kind of modifications.
You will need 3-4 hours for building this cartridge and a very thin soldering equipment.
Good luck ☺
Reiner Ziegler
www.reinerziegler.de