ocr: BUS ARCHITECTURE FOLD OUT SCHEMATIC PAGES 73-76 FOR EASY REFERENCE. The Processor Bus The Processor Bus is the data and address buses that are directly connected to the 8502 processor. These buses are designated Do - D7 for the eight bit data bus and Ao-A151 for the sixteen bit address bus. These buses tie the processor to most of the system ROM and I/O devices, including at least part of all System ROM, all built-in Function ROM, the MMU, the PLA, the 8563 Video Processor, the SID, and both CIA chips. The Processor Bus is in direct communication with the Z-80 co-processor as well. All address ...
