My continuing 11/34 confusion

[Paul Anderson]

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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