3 Nov
2005
3 Nov
'05
11:22 a.m.
Hi Julian,
you have at least response from the console ... never mind :-)
When you press EXAM (or DEP) the M7859 must do a UNIBUS access.
Grant problems will turn on BUS ERR, so there lies you first
point of interest to check out.
You say "I get that BUS ERR no matter what I do".
Please tell exactly what "no matter ..." actions are.
I have no experience with core based 11/34's, so I can not tell
anything more about your board placement. The manual will tell!
However, (not sure), if you have some G7273's, replace the G727's
and put the G7273 in position C-D.
BTW, I am not sure of "All grant cards are installed where you
could read FLIP CHIP from the processor side". I am not near my
11/34. If "FLIP CHIP" is in the etch on the side where the 4
BR contacts are, then they might be installed wrong in the slot!
AFAIR, it should be like this (seen from above towards the
backplane, I can check that this evening):
slot X slot 2 slot 1 <[most right]
__ M8265 M8266
| | position | | | |
| | D | | | |
| | ........... | | | |
| | | | | |
----> | | | | | |
|_| G727 | | | |
this side | | | |
has the | | | |
contact | | | |
fingers
- Henk, PA8PDP.
-----Original Message-----
From: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] On Behalf Of Julian Wolfe
Sent: donderdag 3 november 2005 10:44
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: 11/34a issues
Okay, so I FINALLY worked out my BA11-K power supply issues
and got everything sorted out and installed again.
However, I'm back to where I started when I got this thing
(which I never got past) - I turn it on, the display comes up
at 173536. However, whenever I try to EXAM anything, it
displays 000000 and the BUS ERR light comes on.
I can clear, but I get that BUS ERR no matter what I do. I
haven't got a serial console connected to it yet - I got this
info by going through the
11/34 diagnostics in the manual.
Here's my setup:
BA11-K box
DD11-PK backplane
UNIBUS layout:
A B C D E F
M8266 M8266 M8266 M8266 M8266 M8266 1
M8265 M8265 M8265 M8265 M8265 M8265 2
M9301 M9301 M7800 M7800 M7800 M7800 3
H222A H222A H222A H222A H222A H222A 4
blank blank blank GRANT blank blank 5
H222A H222A H222A H222A H222A H222A 6
blank blank blank GRANT blank blank 7
M7850 M7850 M7859 M7859 M7859 M7859 8
M9302 blank blank GRANT blank blank 9
I've tried switching some boards around, no help.
All grant cards are installed where you could read FLIP CHIP
from the processor side.
I have NO idea what's wrong. Is the memory possibly bad?
That's the only thing I could think of.
Any help, as always, would be much appreciated.
TIA
Julian
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