[Gerry] sent us pictures and a few details on replacing the Game Boy cartridge chip with a flash chip. For the prototype he used a PLCC and a little wire porn to interface a flash chip with the cartridge’s PCB while still having access to it for programming. In retrospect he plans to use a 32-pin ZIF socket on the next version to make things easier. It does work and he’s had some success loading his own code and getting it to run. There are other cartridge hacks that let you load code onto a cartridge but if you have the knowhow and the parts this makes for a fun weekend project. We’ve posted the rest of the photos that [Gerry] sent us after the break.
Update: Gerry is working on a video and a pinout. We’ll post info once we get a hold of it.