Things You'll Need
Instructions
Acquire games, known as "ROMs," that you want to play on the FCE Emulator. Such files are found at websites such as Cool ROM and ROM Nation.
Download and install the FCE Emulator. A Zip file extractor, such as WinZip or WinRAR, is required to install the emulator on the computer.
Connect a controller to a USB port if you want to use one with FCE Ultra. Skip this step if you are fine using the keyboard with the emulator.
Open the FCE Ultra folder that was installed. Open the "FCEUX.EXE" file in the folder. The FCE Emulator opens.
Click "Config" at the top of the emulator; a menu appears. Choose "Input" in the menu. An "Input Configuration" window opens.
Click "Configure" under the Port 1 heading in the window. A "Gamepad" window opens. Click on the different buttons inside the window -- for example the "B" button. Press the button on the keyboard or controller that you want to represent the chosen button. Do this until you are done configuring the keyboard or controller. Click "Close" to close the Gamepad window. Click "Close" to close the "Input Configuration" window.
Click "File" at the top of the emulator. Choose "Open." A window appears. Click the ROM in the window you want to play. Click "Open." The game screen loads in the emulator window.