Game Boy custom MBC1 4Mbit cartridge schematics

[SylverReZ]

I made these schematics back in April to build my own custom 4MBit game cartridge for the Game Boy.

The following chips are compatible:

• AMD AM29F040
• Fujitsu MBM29F040
• TI TMS29F040
• SGS M29F040

Spoiler: Alternative schematics in text form

Top row:
EEPROM A18 > MBC1 PIN 14
EEPROM A17 > MBC1 PIN 15
EEPROM A16 > MBC1 PIN 16
EEPROM A15 > MBC1 PIN 17
EEPROM A12 > CART PIN 18

Bottom row:
EEPROM DQ1 > RAM PIN 12
EEPROM DQ2 > RAM PIN 13
EEPROM DQ3 > MBC1 PIN 04
EEPROM DQ4 > MBC1 PIN 05
EEPROM DQ5 > RAM PIN 17
EEPROM DQ6 > RAM PIN 18

 

[eyeliner]

Is this for make bootlegs? Do you have a working proto?
I like to see writeups of builds, planning on that?

 

[SylverReZ]

Is this for make bootlegs? Do you have a working proto?
I like to see writeups of builds, planning on that?

Yup, you can make reproductions out of these.

 

[eyeliner]

Is being hypocritical towards other people's work your job?

It was a double post. Can't understand why I didn't have that auto merge message...