! Summary The NES Core of BizHawk was written by Zeromus with additional mapper support by [user:adelikat] and [user:natt] This core is written in C# ! Core design It uses a new CPU core, an improved C# version of the new PPU from FCEUX (written by Zeromus), a custom APU, a custom mapper system. Currently it emulates every major mapper and anything for USA roms * [Bizhawk/NESMapperList | Mapper compatibility list] ! Accuracy and Features [EmulatorResources/NESAccuracyTests|Accuracy test results]