I'm trying to use a SNES controller on my original xbox. I understand how the snes controller works and I'm able to read its output. However, I can't find any info at all on the original xbox controller protocol. I know it's usb and I know someone somewhere must have done this before. I'd like to plug in my snes controller into a pic -> have the pic read it -> then have the pic send out an xbox signal to the xbox. Anyone have links to documentation or helpful info?