jg-genplus (Sega emulation core for Jolly Good Emulation)

Genesis Plus GX is an emulator for multiple Sega game systems:
SG-1000, Sega Master System/Mark III, Sega Game Gear, Sega Mega
Drive/Genesis, Mega-CD/Sega CD.

Filenames supported: .md .smd .sra
To run files with other extensions: jollygood -c genplus <filename>

By default, no controls are mapped. The first time you run a game,
press Shift-1 to configure the first controller.