Mind you, this is a fully enabled GUI, with operational windows, a version of Pong, evolutionary tendencies and extremely low RAM requirements. All squeezed in a 4Kb .bin file. Beat this Microsoft. Ha!
Anyway, here's the video to prove the whole thing actually works:
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Related Tags: Atari 2600, Atari, Atari VCS, GUI, G.U.I., OS, Retro, Console, Consles, Retro gaming, Emulation, Free, Freeware, Atari GUI