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From: henderson@esvax.hamavnet.com
Newsgroups: comp.org.decus,comp.sys.dec
Subject: Re: RQDX3/BA123
Message-ID: <1991Mar22.084306.63@esvax.hamavnet.com>
Date: 22 Mar 91 16:43:06 GMT
References: <1991Mar20.163530.6435@eddie.mit.edu>
Organization: Avnet Computer - CTC Group; Culver City, CA
Lines: 39

In article <1991Mar20.163530.6435@eddie.mit.edu>, shawn@eddie.mit.edu (Shawn F. Mckay) writes:
> 
> Howdy. I am having some trouble getting an RXDQ3 working with two RD53's,
> in a BA123 using the dispatch board in slot 13 (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).
Never seen any documentation on this matter, always used factory settings.

> b)	The RXDQ3 itself is not "keyed", so its unclear which way
> 	the cable is supposted to go, (In fact, an educated guess
> 	as to which was can be made by the way the board seems to
> 	have been meant to key, but the cable was never keyed, so
> 	its unclear if this is 100% reliable).
It doesn't matter which way you insert the cable as long as you don't twist it
between the RQDX3 and the board on slot 13.

> c)	The jumpers on the RQDX3 itself seem easy, is there any magic
> 	on should know about?
Just make sure they are at the proper CSR address.

-- 
Javier Henderson
Engineering Services
Avnet Computer
Los Angeles, CA

henderson@hamavnet.com
{simpact,asylum,elroy,dhw68k}!hamavnet!henderson