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

Cega is a cycle accurate emulator for the Sega SG-1000, Master System,
and Game Gear written specifically for The Jolly Good API. Mega Drive
emulation is in an experimental state.

Filenames supported: .gg .sg .sms
To run files with other extensions: jollygood -c cega <filename>

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