Mega Memory Card (Game Boy)
Mega Memory Card |
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Also known as: Mega Memory (EU), Memory Backup (JP)
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The Mega Memory Card is a third-party Game Boy accessory which allows you to back up the SRAM save data from a game cartridge into the Mega Memory's internal flash memory. The cartridge has an upside-down cartridge slot to connect the cartridge you want to back up memory from, similar to GameShark and other Game Boy cheat devices. The device has a switch which allows you to bypass the Mega Memory software and run the game on the cartridge in the second slot.
The device comes in two different styles: a yellow semi-transparent cartridge, and a black glittery cartridge which was sold in French-language packaging.
One peculiar aspect of the device is that it uses a trick to switch the cartridge base memory area during the boot process to display a custom logo in the startup animation instead of the usual Nintendo one.
Factory Test Screen
Hold Select + Start + B + A while the cartridge is booting. The test screen attempts to query the internal flash chip for its ID, as well as enumerate the SRAM banks in the secondary cartridge. The correct value is 04BF, which corresponds to the SST 28SF040 EEPROM/flash memory in the cartridge. If the debug screen is executed in an emulator, the result will likely be 3EC9, which corresponds to the first two bytes in the program ROM.
Mushroom/Kingpin
The Mega Memory uses the 16-byte string "Mushroom/Kingpin" ($2848-$2857 in the ROM) as a test string to determine whether there is writable SRAM present in the secondary cartridge. It is unknown whether this is a purely random choice of words or a reference to something, such as a greeting to a member of a scene group. This string appears to not be accessed anywhere else in the ROM.
- Pages missing publisher references
- Games published by InterAct
- Games published by Datel
- Games published by Karat
- Unlicensed Game Boy games
- Pages missing date references
- Games released in 1999
- Games released in October
- Games with unused text
- Games with debugging functions
- Pages missing developer info
- BIOS/Firmware ROMs
Cleanup > Pages missing date references
Cleanup > Pages missing developer info
Cleanup > Pages missing publisher references
Games > BIOS/Firmware ROMs
Games > Games by content > Games with debugging functions
Games > Games by content > Games with unused text
Games > Games by platform
Games > Games by publisher > Games published by Datel
Games > Games by publisher > Games published by InterAct
Games > Games by publisher > Games published by Karat
Games > Games by release date > Games released in 1999
Games > Games by release date > Games released in October
Games > Unlicensed games > Unlicensed Game Boy games
The Cutting Room Floor > Unimportant Awards > Game Boy games