► Single game cartdrige

The 'basic' cartdrige exists in several design:
Sega Japanese cartdrige
Sega US/Europe cartrige
EA cartdrige
Exotic cartdrige from China/Taiwan/...

► DIY

Devster's 256K cart schematic

Rom Laboratory

Megadrive cartmodding (fr)

► Links

Nepereny's Sega GameGear / SMS / Genesis / 32X PCB & roms list (mirror)

GameReproductions

Rob Webb sells a screwdriver to open Sega's cartridge