My interest in PowerPC-based Macs has seen a resurgence lately, at the center of which is upgrading my Pismo PowerBook. I am interested in studying the protocol these machines use(d) to interface with their daughterboard. Does anyone have a comprehensive source detailing this information, schematics, pinouts, etc.? Anything along these lines would be appreciated. I could, either, upgrade the daughterboard that I have or, with sufficient knowledge/reverse engineering, develop a custom daughterboard. One could, perhaps, use an FPGA as a chipset/memory controller to use a later G4 CPU and DDR2 RAM in these machines. This is quite a tantalizing prospect, since my interest in working with FPGAs has been undergoing a resurgence as well.
