Emulation FCEUmm

FCEUmm is a Nintendo Entertainment System video game system emulator that can be used as a libretro core.
FCEUmm requires a real BIOS for Famicom Disk System emulation to work.

FCEUmm is able to emulate the Nintendo Zapper accessory in one of two ways.

For standard Famicom/NES ROMs:

  • Load a standard Famicom or NES ROM in the FCEUmm core
  • Access the RetroArch Quick Menu
  • In the Input Settings for User 1, specify a device type of Gamepad
  • In the Input Settings for User 2, specify a device type of Zapper
  • Exit the Quick Menu

For VS Unisystem ROMs:

  • Load a VS Unisystem ROM in the FCEUmm core
  • Access the RetroArch Quick Menu
  • In the Input Settings for User 1, specify a device type of Zapper
  • Exit the Quick Menu