fceu(6) An emulator for the original (8-bit) Nintendo game console.


fceu [options] "filename"


FCE Ultra is an emulator for the original (8-bit) Nintendo Entertainment System (NES). It has a robust color palette rendering engine that is fully customizable, along with excellent sound and joystick support, and even includes TCP/IP based network playing for head-to-head gaming with your friends!


These are some of the more frequently used options in FCE Ultra. Run fceu without any options for a larger list, or see the README for the full list.
-fs {0|1}
Toggle full-screen mode.
-xres <res>
Set the Horizontal resolution for full-screen mode.
-yres <res>
Set the Vertical resolution for full-screen mode.
Enable Game Genie emulation support.
-cpalette <file>
Use the custom palette in <file>.
-soundvol <percentge>
Sets the sound volume to the given percentage.
-sound <rate>
Set the sound playback sample rate (0 == off).
-connect <server>
Connect as a client (player 2) to <server> for TCP/IP network play.
Be a host server (player 1) for a TCP/IP network game.
-netport <portnum>
Use <portnum> for TCP/IP network play. Default is 4046.


FCE Ultra has a number of commands available within the emulator. It also provides keyboard bindings for emulating gamepads or powerpads.

Gamepad Keyboard Bindings

NES GamepadKeyboard

ArrowsCursor Arrows

Other Commands

Activate cheat interface.
Toggle full-screen mode.
Save game state into current slot (set using number keys).
Restore game state from current slot (set using number keys).
Save screen snapshot.
Reset NES.
Toggle power to NES.
<F12>, <ESC>
Quit FCE Ultra.


This manual page was written by Joe Nahmias <[email protected]>, for the Debian GNU/Linux system (but may be used by others).