On September 24, Steve Threlfall-Rogers wrote:
> Interestingly enough the system works fine with the board in but the
> ribbon cable disconnected!.

  This is because the MicroVAX II uses a PMI (private memory
interconnect) to talk to the memory...it's a private bus between the
cpu and the memory.  The memory doesn't reside on the Qbus, but is
accessible through the MMU on the cpu card.


                             -Dave McGuire