I-Pac controller in a new case with cleaner wiring.
When I first started this blog I created a posting about how I could build a better controller for Stepmania by using a device called an I-Pac. In the MAME community the I-Pac does what modern day mechanical keyboards do by assigning each key its own interrupt onto a micro-controller giving you the absolute fastest response between your joystick and your PC. The only way you could go any faster then this device is by bypassing the USB bus all together and wiring your controller via GPIO onto something like a Raspberry Pi.
