NES Cartridge I/O Maps....

[ColeP]

Hey, I am an electronics engineer, and have decided to remove all the moving parts my my NES and 30 or so games, done with a keypad, and a rather ridiculous 30 channel 72 bit multiplexing network, but the thing is, I need to know what pins on the cartridge are Input, and what Pins are output. If anyone happens to know, I would appreciate it alot.