PDP-11/34A rebuild project Was: Re: Post-move diary

From: Megan <mbg_at_world.std.com>
Date: Thu Apr 1 08:47:21 1999

>I've got it in the wrong way round several times and it's never done any
>damage. It just doesn't work (no display at all IIRC).
>
>Berg cables in DEC machines are rarely keyed, alas.

Actually, I can point to a number of counter-examples of that...

Anyway, I'm simply going to keep the cables in the machine in case
I want to do it at a later time... I have so many other things to do
with the machine to get it running first...

>I've found the VT11 prints - sort of. I've got the schematics of the 3
>boards :
>
>M7013 Display Control
>A320 Display Generator
>M7104 Bus control + bootstrap

They might be useful at some point... but not yet (I haven't even found
my VT11 boardset, if I have one).

>What I don't have is any information on the backplane. So I don't think
>I'll be of much use at the moment.

Again, problem is moot until I have more of the required pieces... I'll
keep you in mind for the other info though at some point...

>I know I don't have the LPS printset. I do have a minimally-configured
>LPS somewhere, though.

I haven't opened mine up yet to see what I have... if you can easily
get to yours, it might help to have info on board order, and UNIBUS
connection point... (I take it a terminator has to be in the LPS
since it connects to the UNIBUS itself...)

BTW - It was pointed out to me that the file containing the picture
of my haul was somehow protected... I've taken care of it.

Look for a trip writeup with pictures in the near future (I've got it
mostly written, I just have to insert the thumbnails and links to the
full pictures)...

                                        Megan Gentry
                                        Former RT-11 Developer

+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
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Received on Thu Apr 01 1999 - 08:47:21 BST

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