Motherboard
Block Diagram of the Motherboard. The C64 motherboard PCB Assembly Diagram PCB Schematic PCB Assembly Number 250466. Schematic Number 326106. Revisions [edit | edit source] Original. Revision A. E [edit | edit source] PCB Assembly Number 250469. Schematic Number 252311, 252312; KERNAL & BASIC ROMS combined into U4. New IC memory controller, U8. In 1987, Commodore …