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FCEUX is an interesting and useful NTSC and PAL Famicom/NES emulator that is an evolution of the original FCE Ultra emulator. Over time FCE Ultra had separated into many separate branches. The concept behind FCEUX is to merge elements from FCE Ultra, FCEU rerecording, FCEUXD, FCEUXDSP, and FCEU-mm into a single branch of FCEU. As the X implies, it is an all-encompassing FCEU emulator that gives the best of all worlds for the casual player, the ROM-hacking community, Lua Scripters, and the Tool-Assisted Speedrun Community.

We are particularly excited by the Lua scripting capabilities which have been ported over from FCEU rerecording and prepped for further development. FCEUX2.1 comes pre-packaged with all Lua related .dlls. In order to use Lua in windows builds prior to 2.1 you will need the luapack [fceux.com/luapack] which should be unzipped alongside your fceux.exe. The large numbers of dlls wasn't our choice; but it will enable the iup user interface library which will permit scripts to create their own guis, as well as rendering the base FCEUX distribution more compact.