Henk Gooijen wrote:
Date: Tue, 4
Aug 2009 21:53:03 -0700
From: derschjo at
mail.msu.edu
To:
Subject: Re: Re-request for 11/40 unibus clarification...
Thanks! (And thanks also to Al for putting up a set on Bitsavers --
downloading now.)
Looks like I have wire wrap Rev D on my backplane. Looks like the
Bitsavers copy is Rev F. I suppose the odds of anyone knowing what the
changes were between D and F are going to be pretty low :).
Thanks (can't be said often enough) for making available Al!
Whatever the differences are between rev. F and your Rev. D backplane,
you will certainly be able to check the "non-UNIBUS-ness" of slot 9 ...
gd luck,
- Henk.
Well, I spent the evening probing out the slot 9 wiring and double
checking it with the print set, and everything checked out a-ok. I was
really disappointed :). While I had the backplane out I took the time
to give the backplane a good thorough cleaning (contact cleaner + wiping
down the connectors with a bit of cardboard in the slots).
Still having the same problems. Alas. I suppose I could go back and
check for shorts/incorrect connections in the wire wrap for slot 9 but
I'll leave that for another night when I have a LOT more spare time as
that would involve a lot more probing :). I did at least manage to
confirm that the +15V to slot 9 does connect at CU1. (I had
mis-identified it as CV1 in my previous mail.)
This is quite frustrating. I just want some blinkenlights, is that too
much to ask? :)
- Josh