PDP 11/55 / 11/45 Prints (Was PDP 11/70 console wiring diagram)

From: Jay Jaeger <cube_at_msn.fullfeed.com>
Date: Tue Nov 17 21:15:23 1998

"Things are seldom what they seem; skim milk masquerades as cream!"

Well, it turns out that my 11/45 is something of a mixed bag, and probably
isn't simply
an 11/45 at all. The aluminum plate on the console indicates KB11A S/N
01-05231 .
The sticker (mostly overlaid by another) on top of the backplane indicates
system S/N 1525.

But the overlay sticker is probably what counts. It indicates KB11D Rev.
D, Backplane
Rev R,. System S/N 293. If I am reading things right, I have an 11/55 in
an 11/45 case.

I had never bothered to check before. Sigh. Kind of a pity that it isn't
itself anymore.
The real pity is that UW Chem E. used to have a real 11/55 (white front
panel), that
I didn't pursue because I was out of room, several years ago.

Here are the board revisions, according to the sticker on top. (I verified
one of them).

Board Etch / CS

M8109 C/S
M8100 -/C
M8101 B/D
M8132 P2/C
M8123 C/B
M8104 A2/C
M8105 B/J
M8119 A/C
M8108 B+P2/H
M8107 A/A

FPU:

M8129 B/B
M8129 C/B
M8127 C/B
M8126 C/C


At 06:56 PM 11/16/98 +0000, you wrote:
>>
>> I have noted a recent thread on 11/70 prints. I have an 11/45, but no
>> prints, and would love to get ahold of some. Anybody out there have some?
>
>Note that the 11/45 had several changes at serial number 2000 (the UDR
>board was revised, the PSU wiring changed, etc), and it's helpful to have
>the right prints.
>
>I have both versions (and an old-style 11/45 to look after), but I can't
>easily copy them. Does anyone closer have them? I can trivially look
>things up if it's the sort of info that can be transmitted by e-mail,
>though.
>
>BTW, _I'm_ looking for the 11/730 CPU prints (and the R80, for that
>matter, I have a compact system...). Anyone in the UK got a spare set?
>
>-tony
>

---
Jay R. Jaeger The Computer Collection
Jay.Jaeger_at_msn.fullfeed.com visit http://www.msn.fullfeed.com/~cube
Received on Tue Nov 17 1998 - 21:15:23 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:31:19 BST