The 'ChImp' is the integration of two boards, the 'Cthulhu' and the 'Imp', onto a single board.
The ChImp can be used by itself as a standalone PC orPlayStation 3 compatible controller. However, the key strength of the ChImp is using it along side a common ground, wired Xbox360 controller. If the ChImp sees that it is connected to an Xbox360, it will hand over control of the single USB cable to the Xbox360 controller automatically. The ChImp CAN NOT communicate with an Xbox360 by itself! In order to use your arcade stick on an Xbox360 with a ChImp, a common ground Xbox360 controller MUST be hacked and wired to the ChImp.