With a slate of old-school 2D fighting games like Street Fighter 2 and Mortal Kombat 3 being released on the Xbox 360 [twistedsymphony] thought it would be nice to have a decent old-school gamepad to play them with. His final interface board lets you use an unmodified Saturn controller with the Xbox 360. He used a chopped up Saturn cable extender to attach the controller to a PIC16F690. The PIC decodes the Saturn pad’s button presses. It then triggers a corresponding analog switch that acts as a button press on the actual 360 controller. He did it this way instead of the much harder task of figuring out what the 360 controller protocol was actually doing. Future plans include support for other system’s controllers. Here’s a demo video.