RLV12 placement in H9278-A question

Patrick Finnegan pat at computer-refuge.org
Thu Feb 21 10:27:51 CST 2008

On Thursday 21 February 2008 11:05, John A. Dundas III wrote:
> Perhaps someone could clarify, the manuals are less than explicit on
> this.  What kind of slot can the RLV12 be placed in?  Does it need a
> Q22/Q22, Q22/CD, does it not matter, or are there jumpers to
> accommodate either?

Doesn't matter.  Generally, anything that works in a Q/Q slot will work 
in a Q/CD slot just fine, unless you have made some other error (like 
putting it in place of 1/2 of a 2-board set that expects to have a 
different board following/preceding it, though the only connections on 
the 2nd set of fingers are probably grant continuity jumpers on the 
RLV12, so you'll only end up breaking the stuff you installed 
wrongly :).

QBUS is much more forgiving (and simple) than all the variants of slots 
possible on a UNIBUS-attached backplane.

Purdue University ITAP/RCAC       --- http://www.rcac.purdue.edu/
The Computer Refuge               --- http://computer-refuge.org

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