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From: shawn@eddie.mit.edu (Shawn F. Mckay)
Newsgroups: comp.sys.dec
Subject: Rqdx3/ba123
Message-ID: <1991Apr17.035213.29724@eddie.mit.edu>
Date: 17 Apr 91 03:52:13 GMT
Sender: news@eddie.mit.edu (Usenet News)
Reply-To: shawn@eddie.mit.edu (Shawn F. Mckay)
Organization: MIT EECS/ECF Facility, Cambridge Mass
Lines: 38

Howdy. I am having some trouble getting an RQDX3 working with two RD53's,
in a BA123 using the dispatch board in slot 13 (AB or CD).

It never seems to find the drives:
?40 NOSUCHDEV
?06 .....

Sometimes I get (I tried dub1 just "in case"):
?41 DEVASSIGN, DUB1

I have both the Tech Manual, and the MicroF, and neither seems
to cover a few important points:
a)	The signal distribution board (M9058) has some jumpers,
	which have no documentation, (I'm told they "matter" but
	no one seems to recall why or how).

b)	By advice and example keeping the cable untwisted seems
	to work between the dist board and Rqdx3, what about the
	cables between the dist board and the displays in front,
	the cable between the dist board and the lights have 4
	heads, which is drive 0?

c)	The jumpers on the RQDX3 itself SEEM easy, is there any magic
	one should know about? The setup NEVER seems to work, we have
	a bunch of Rqdx3's here, KNOWN good, (they work in BA23 boxes),
	so do the RD53's we use. Why is the BA123 such a pain to get
	working?

We have looked through the manuals, the configuration we are using
is "legal" according to it, but its awful unclear, which is not my
usually feeling from DEC manuals, can anyone out there offer some
assistance in this matter?

					Thanks,
					  -- Shawn

p.s.
We run ESDI controllers in our ba123's just fine :-)