3 Jun
2002
3 Jun
'02
2:07 p.m.
On Jun 3, 15:23, Andreas Freiherr wrote:
yes, I also remember having seen PDP-11/VAX
peripherals controlled by a
68000. However, with this board, I am not quite sure if it is Qbus or
UNIBUS at all. I'd have to trace the connections, but before doing so,
my suspicion is that this was some different kind of system with the
Motorola centipede being the main processor.
And, no, I did not notice any particular driver chips like the 1488/1489
(or maybe 75188/75189, or some of those 8-pin chips from the DLV-11/J,
or...). The absence of such chips together with the large number of pins
makes me think this might be a separate memory bus, similar to what the
MicroVAX II had.
To me, this sounds like a CADMUS 68000 CPU, made in Germany. I've not had
much experience of them, but I've seen a couple. They used a 68000 (or
maybe 68010), on a quad-height card, in a Q-Bus backplane. It's a long
time since I've seen one, but I seem to remember an over-the-top memory
connection, not unlike a microVAX. I do remember that a lot of the support
boards didn't have handles, and tended to sag, so that they had to have
bits of folded card and BluTak inserted to stop them shorting together
after a few years.
The CADMUS systems I saw ran UNIX, a System III derivative, I think, and
were used in the Department of Building at the Heriot-Watt University.
I've just had a look to see if I still have any Cadmus docs, but I can't
find any :-(
--
Pete Peter Turnbull
Network Manager
University of York