CatFlash Mittens (4Mbit GameGear Flash Cartridge)

CatFlash Mittens is a 512 KB / 4 Mbit reprogrammable flash cartridge board for the Game Gear.

It provides 512 KB of ROM space and includes an onboard CPLD mapper for Sega-style bank switching. This allows it to run games beyond the standard cartridge size limit. It's fully compatible with devkitSMS banked code.

Perfect for homebrew releases, demos, ROM hacks, and development builds.

Save data can be written directly to flash, so there is no coin-cell battery to die and need replacing. The board is designed to fit inside a standard Game Gear cartridge shell for a clean cartridge look.

It can be reprogrammed as many times as needed.

Built on Raphnet's proven open design, manufactured and tested by Two Black Cats.

 

A compatible cartridge flash programmer is required to write software to the cartridge. Tested options include:

• Raphnet programmer with the Raphnet Game Gear adapter.
• Sanni Open Source Cart Reader / Open Cart Programmer with RetroDumper GameGear to MD slot adapter (available in Amazon Japan) or Raphnet Game Gear adapter.