I recently bought a Broadband Adapter for my GameCube and installed it into Serial Port 1 and realized something: what are the other ports on the bottom of the GameCube for? In addition to Serial Port 1, there is Serial Port 2 and Hi-Speed Port which I have yet to discover their purpose. I looked through the GameCube Instruction Manual and the official Nintendo online profile pages and didn't find anything. So just to satisfy my curiosity, does anyone know what these other two ports are for?