jg-nestopia (NES emulation core for Jolly Good Emulation)

Nestopia JG is an emulator for the Nintendo Entertainment
System/Famicom, including support for the Famicom Disk System. Though
originally a fork, Nestopia JG is now the de facto upstream branch of
the Nestopia emulator.

Filenames supported: .nes .fds
To run files with other extensions: jollygood -c nestopia <filename>

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