8 Jun
2006
8 Jun
'06
7:08 a.m.
Do you have a Uni-bus Troubleshooting Guide?
Paul
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Julian Wolfe
Sent: Wednesday, June 07, 2006 6:01 PM
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: My continuing 11/34 confusion
Alright.
I know this is a very COMMON problem, but the other COMMON problem is there
seems to be no good explanation as to what pins are what on the damn
backplane. I know I may be coming off sort of abrasive here (no offense
meant to Henk or anyone else) but even the 11/34 documentation *also* talks
about the bus grant path and gives no pin explanation on the backplane -
you're just supposed to inherently know where the connection between CA1 and
CB1 is in a mass of pins and wire.
I've looked through what manuals are available on bitsavers and manx, and
got nothing at all that I could make sense of.
All I'm looking for is simple pin labling for a DD11 9 slot backplane. Why
was this so hard to put in the manual?
IMO this information should be included in whatever FAQ you want to add the
bus grant info.
-----Original Message-----
From: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] On Behalf Of Gooijen, Henk
Sent: Wednesday, June 07, 2006 5:10 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RE: My continuing 11/34 confusion
First the easy question ... must be FAQ by now!
Did you check the wire CA1-CB1 for the slots 6-7-8-9 ?
It *must* be present. The simplest check is replace all
G727s and install G7273's in position C-D in slots 6-7-8-9.
As long as the RUN light stays on after power up, you have a bus hung.
- Henk.
________________________________
Van: cctalk-bounces at classiccmp.org namens Wolfe, Julian
Verzonden: wo 07-06-2006 22:40
Aan: 'General Discussion: On-Topic and Off-Topic Posts'
Onderwerp: My continuing 11/34 confusion
Alright, so, I finally was able to get good readings at the
backplane as far
as votages go. My AC voltage is exactly 28 volts going into all units
requesting. The -15v line is fine, it must just be the bulb
that's burnt
out on the regulator. So, as far as I can tell, my power
supply is working
just as it should.
So now I move up to the backplane.I plugged in the memory and
a DL11-W and
put a tester on the RS232 lines - I get nothing coming from
the DL11-W. The
front panel reads all zeros when powered on, the Run light
and DC lights are
on.
Here is my current backplane config:
1 M8266-----M8266-------M8266-------M8266-------M8266-------M8266
2 M8265-----M8265-------M8265-------M8265-------M8265-------M8265
3 M7891-----M7891-------M7891-------M7891-------M7891-------M7891
4 M9301-----M9301 M7859-------M7859-------M7859-------M7859
5 EMPTY EMPTY M7856-------M7856-------M7856-------M7856
6 EMPTY EMPTY EMPTY EMPTY G727 EMPTY
7 EMPTY EMPTY EMPTY EMPTY G727 EMPTY
8 EMPTY EMPTY EMPTY EMPTY G727 EMPTY
9 M9302-----M9302 EMPTY EMPTY G727 EMPTY
Can anyone make sense of this?
Thanks
Julian
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