I'm trying to find docs for monolithic systems 8009 board. multibus I, z80, RAM ROM 2 serial, FDC. I see references to the board online but no actual docs. I'm looking for information (schematic) for the on board interrupt logic and bus interface. I've figured out enough to get CP/M 2.2 running on it but things like interrupts,bus time out and arbitration are implemented in PALs and defy my attempts at reverse engineering. Even docs from another model (800X) may prove useful since similar logic may be used. thanks joe lang