An Open Source CPLD based Sega Megadrive/Genesis Flash Cart

X-flash is my Sega Megadrive developpement cartridge. I use it for some research and do all of my hardware test. It's based on the good old EPM240 and a 64Mb flash memory

Rewritable 64 Mb Flash ROM
192 Macrocells CPLD
Clean 5V <> 3.3V level shifting
7 GPIO for user
Open Source Hardware & Software & PCB

Classic 32Mb cartridge ( no mapper )

Just flash the needed core into the CPLD and cartridge will works in the same way as an original. You can reflash memory with any compatible Megadrive reader ( for exemple MD Dumper / Krikkz / Sanni cart Reader )