Official Nintendo Game Boy Flash Cartridge Board Scans

Official Nintendo Game Boy Flash Cartridge - Back side

Official Nintendo Game Boy Flash Cartridge - Back side

Official Nintendo Game Boy Flash Cartridge - Front side

Official Nintendo Game Boy Flash Cartridge - Front side

Official Nintendo Game Boy Flash Cartridge - Cartridge Shell

Official Nintendo Game Boy Flash Cartridge - Cartridge Shell


These are official Game Boy flash cartridge sold in Japan. You would go to a designated flashing station and have your cartridge flashed for a cheap price.
The cartridge is marked DMG-MMSA-JPN and the board is marked DMG-A20-01 (I’m not sure whether the character after the 2 is a zero or upper case o – I’m actually leaning towards the latter as it appears to be a little bit wider than the following 0)
The board contains three intergrated circuits.
  • 29F008ATC-14 – 8 Mbits (1 Mbyte) flash ROM. I can’t find a datasheet for it, so I’m guessing it’s a custom or OEM chip. I’ve seen Mask ROMs/OTPROMs in game cartridges also marked MX, so Nintendo probably had a contract with them.
  • UT621024SC-70LL – 1Mbit (128 kBytes) of battery packed save RAM.
  • MX15002UCA – Custom logic chip marked G-MMC1. The apparent function of this chip is MBC like functionality. Maybe there’s more to it too, like the ablity to offset the ROM and RAM addresses for multigames or flash memory protection? Details unknown. There’s an unused place for a crystal.

Note the square boxes on the back side, of the PCB, on the opposite side of the connector that goes into the cartridge header. These were most likely used in the factory to program the cartridge initially. Notice how the “unimportant” system clock and external audio inputs are missing this box. Also note the nice rounded PCB traces. Not often you see these. Visually appealing, indeed.
And maybe it’s a sign I’m getting too little sleep that I’m seeing a “face” in the image.
gbcartface
The scans are provided by Duo.

Friday, June 5th, 2009 Hardware, Links & info

7 Comments to Official Nintendo Game Boy Flash Cartridge Board Scans

  1. Hi, where I can find this cart model?

    Thanks!

    Drop 1410

  2. drop 1410 on June 21st, 2009
  3. Keep your tentacles out… This is a rare beast, it was even back in the days when it was sold commercially, so don’t expect to find one easily. Get to know people in the scene. Check eBay everyday. Or go to Akihabara! ;)
    If you just want a flash cartridge for general use, buy a USB cartridge from this site instead. (Which you already know, as I can see from your blog.)

  4. nitro2k01 on June 21st, 2009
  5. Ja! GOT ONE… ;-)

    Bye Bye!

  6. Drop 1410 on June 23rd, 2009
  7. I want also one………. and i have a brand new Classic GAMEBOY where can i find one or is it better to play the ROMS on the DSI

  8. the_game_freak on November 11th, 2010
  9. but the Classic GAMEBOY feels like real old memmories of the late 80,s
    So i want one i pay 60 euro,s for it

  10. the_game_freak on November 11th, 2010
  11. [...] if you look inside the cartridge, you can see that the RAM chip, UT621024, is clearly a 128 kiB chip, but apparently [...]

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