QuickNES-Core: QuickNES-Core (libretro QuickNES core library) QuickNES-Core: QuickNES-Core: Nes_Emu, the core NES emulator library used by QuickNES, began as a QuickNES-Core: very simple NES emulator sometime in 2004. It was based on the 6502 QuickNES-Core: CPU core and APU sound core used in the Game_Music_Emu sound engine. QuickNES-Core: QuickNES-Core: Homepage: https://www.libretro.com/ QuickNES-Core: QuickNES-Core: QuickNES-Core: QuickNES-Core: