22 Mar
2005
22 Mar
'05
5:10 p.m.
Eric,
Thanks for the clarification, my mistake, I thought my old 11/84 was
Uni and Qbus CPU/Bridge in the same system, so I thought it meant it was
a dual bus system outside of the Qbus cards in it.
Curt
Eric Smith wrote:
Curt wrote:
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You should also consider if you want a Unibus
system (even numbered) or
a Qbus system (odd numbered) or a hybrid like an 11/83.. though thats an
80's system, hmmmmm....
The 11/83 is a Qbus system. There aren't any "hybrid" systems.
You were perhaps thinking of the 11/84 and 11/94 Unibus systems, which use
the same CPU modules as the 11/83 and 11/93 Qbus systems. But when those
modules are used in the 11/84 and 11/94 backplane, there is *NOT* a Qbus
present. There is a somewhat-Qbus-like bus, but it is not compatible with
Qbus either electrically or in terms of bus protocol.
Anyhow, none of those meet the "70's design" criteria Ian specified.
Eric