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From: cetron@utah-cs.UUCP (Edward J Cetron)
Newsgroups: comp.org.decus
Subject: Re: QBUS is wired how?
Message-ID: <4582@utah-cs.UUCP>
Date: Fri, 22-May-87 12:13:26 EDT
Article-I.D.: utah-cs.4582
Posted: Fri May 22 12:13:26 1987
Date-Received: Sat, 23-May-87 15:58:54 EDT
References: <1086@batcomputer.tn.cornell.edu>
Reply-To: cetron@utah-cs.UUCP (Edward J Cetron)
Distribution: world
Organization: Center for Engineering Design, Univ of Utah
Lines: 20
Keywords: QBUS, 11/23



first find yourself a qbus manual with pin definitions.  Then connect (by
soldering to the backplane of the minc lines qdal(16-21) which are the 4 upper
22-bit qbus lines. you know have a 22-bit backplane 'cept for one small problem
if you have any minc cards still in it - several minc cards USED bdal(16-21)
for other things so you will likely have to make sure that bdal(16-21) in the
cpu card cage is isolated from bdal(16-21) in the minc instrumentation bus
section.  you should then be able to get a set of cables (don't remember the
part number) to connect the ba23 to the minc backplane.  As for making a
mincro-vax (yea i thought up the name) you do the above and move the cards
over.  Now that I think of it, I don't remember which part of the backplane
was q/q and which was q/cd but I do remember that there WAS a way to do it
(it may have required the ba23 and cables...)  you will also have to add
4 resistors to the bdv11 bootstrap-terminator card to match lines bdal(16-21)


-ed cetron
cetron@cs.utah.edu
cetron@utahcca.bitnet