Ambience Design Game Stop

Where can I find a schematic for connecting a gamecube controller plug to a USB plug?

I’m trying to make my own Gamecube Controller to USB converter. I know i can buy one but i’d rather make my own.

The following link has a wealth of information on the pinout and the protocol, complete with source code for a PC interface.

http://www.int03.co.uk/crema/hardware/gamecube/gc-control.htm

Configuring Project 64 with the Universal USB Converter