The 64JPX-JoyPad eXpander is a small interface that makes it possible to connect Sega MegaDrive/Genesis, Nintendo SNES/NES joypads, or other controllers to Commodore and Atari computers. It also provides a few extras such as: Auto-fire. Separate buttons for Racing games (acceleration and braking). Waddle modes for sports games. Creep mode / slow-motion. Take a look at the web page for all the possibilities.