> > Waitaminute - are you saying that you can make a multiple-cpu UVII? I 
> > happen to have access to

You want to read Micronote #025, "Microvax II multicomputing", by
Mike Collins.  It's available online at:

          http://sunsite.unc.edu/pub/academic/computer-science/history/pdp-11
          /hardware/micronotes/numerical/


> Yes and No. When you install 1-3 slave KA630 CPU cards in UVII, the result is
> a weird 4 CPU machine that doesn't share main memory. The slaves can only
> access the 1Mbyte of on-board RAM and the master accesses the memory
> expansion cards.

It depends on what you call a "UVII".  If you're talking about a single
BA23 or BA123 box, you're right.  If you're willing to chain multiple boxes
and/or custom wire a backplane so each CPU gets its own private Q/CD bus,
then you can have up to 16 Mbytes for each CPU.  It's all explained in
the Micronote...

Tim.