mega-drive-controller
There are 2 repositories under mega-drive-controller topic.
tebl/MSX-Mega-Adapter
Adapter so that Sega Mega Drive (Sega Genesis in North America) gamepads can safely be used with the MSX line of computers.
tebl/A7800-Mega-Adapter
Adapter for using a wired Sega Mega Drive/Genesis controller on an Atari 7800.