There are several different ways of setting up your controls. First let me suggest that you use Happ Controls when building your arcade machine. I tried using WICO, and they were EXTREMELY rude, and I would not buy a quarter from them for a penny. You can either purchase a keyboard emulator, which is about $120 for a good one, or you can just hack an old keyboard. I suggest hacking a keyboard, it is much easier and probably won't cost you a thing. When you open up a keyboard, it may have either carbon covered contacts, or a board to which each key has been soldered. If you open a keyboard and find a small PCB (printed circuit board) about the size of a gamepad, then check some other site on how to hack one of those. You can also use a gamepad. I used both a gamepad and a keyboard. I used the gamepad for the 8-way joysticks (keyboards will only detect 4-way!) and the keyboard for the enter, escape, coin, 1 & 2 player buttons, and for the fire button. If your keyboard has carbon covered contacts, use a fine sandpaper to remove the carbon, and reveal either copper or silver wires. Just wire the controls to the proper keys and your all set. If your keyboard has each key soldered to the back of the board, just locate the appropriate key, and solder the controls to it. That's it! This will take a LONG TIME! I have only one joystick and six buttons on mine, and it took me an hour and a half!