
Nestopia is an open source NES/Famicom emulator designed to emulate the NES hardware as accurately as possible. Originally for Windows only, Nestopia has been ported to the Mac OS X and Linux operating systems.
Nestopia emulates the NES CPU at cycle-exact granularity, ensuring full support for software that do mid-scanline and other timing trickery. Other features listed in Nestopia's manual include:
Nestopia was originally developed for Windows by Martin Freij. Richard Bannister and R. Belmont later ported it to Mac OS X and Linux, respectively. A cheat code pack has been compiled and available on Mighty Mo's World. It consists of thousands of Game Genie and Pro Action Replay cheats for hundreds of games. The file is updated often.
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