Game Raccoon
The Game Raccoon is a game development interoperability cartridge designed to allow you to test your own Sega Mega Drive or Sega Genesis in-development games on real system hardware. It uses an inexpensive PIC microcontroller to transfer game images from SD card to internal memory, where the Mega Drive can read your code as if it were from a normal cartridge. It has its own internal menu system allowing you to explore the filesystem of the inserted SD card and select an image to boot. No external programmer or tools are required. Revision 1 can boot many homebrew images from sites such as, as well as the author's own YM2612 Instrument Maker.

Updated August 2020:

Revision 1 Technical Report Overview of the purpose, function and workings of Game Raccoon Revision 1, with downloads and photos. • Matt's Chronoblogical Misadventures In Game Raccoon Land Revision 1 - February - August 2020 Chronoblogical mis-development of the Revison 1 cartridge, design of the new logic, bug-fixing, new menu, cartridges, and lots of testing!

Updated Feburary 2020:

Revision 0 Technical Report Obsolete information about the first revision of the Game Raccoon board. • Matt's Chronoblogical Misadventures In Game Raccoon Land - January 2020 Full chronological development of the Game Raccoon up to Revision 0, starting from concept, sketches, designs, lots of rectangles, specification, manufacturing and prototype board.