atari 2600 emulator
run ./2600 [rom file]
incomplete and incompatible with certain rom types
see:
https://github.com/stella-emu/stella
https://atarihq.com/danb/a2600.shtml
https://archive.org/details/Atari_2600_TIA_Technical_Manual/page/n19/mode/2up