Q-18 to Q-22 backplane conversion
pete at dunnington.plus.com
Thu Dec 22 02:14:13 CST 2005
On Dec 21 2005, 13:57, joseph c lang wrote:
> Before I put all the screws back in this thing......
> I'm converting a H9273 Q-18 backplane to use a 11/23 Q-22 CPU and
> MSV11-LK memory. (and RQDX3 and DELQA )
> >From the prints I can find ,It looks like all I have to do is bus
> through BDAL21 lines, and add an ECO to the BDV11 that terminates
> the additional BDAL lines.
> Am I missing something?
That's all, as far as I can remember (done this a few times). If it
came from an expansion box rather than a CPU box, or from an early
11/03, look for W1...W3 on the backplane and check that W1 is inserted
and W2,W3 are not. Remember this is a "straight" backplane, so don't
try to bus the CD side.
Pete Peter Turnbull
University of York
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