msc 8009 docs

joseph lang joe.lang.0000 at
Tue Aug 11 11:43:26 CDT 2015

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.

joe lang

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