Help with PDP11 modules, DEC and Plessey
henk.gooijen at oce.com
Wed Oct 11 01:30:06 CDT 2006
> -----Original Message-----
> From: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Philipp Hachtmann
> Sent: woensdag 11 oktober 2006 3:27
> To: cctalk at classiccmp.org
> Subject: Help with PDP11 modules, DEC and Plessey
> Hi folks,
> today I digged out some PDP11 modules. I wonder what I can do
> with them.
> A Plessey-labeled Unibus Box with 11/34 front panel (the
> simple one) is still waiting to be picked up by me or put to scrap...
> Ok, what I found:
> * DEC M8265+M8266 (11/34A CPU), M9301 bootstrap/terminator
> Question: Is that enough to get the machine going? Do I need
> anything else (except memory and a kind of tty interface)?
> What about the "parity controller" which I don't have?
Don't know about the parity controller. I am guessing that it
belongs to the memory, not the 11/34 CPU. As you say, a little
memory and a console interface M7856 is all you need, besides
the DD11-PK (11/34 CPU) 9-slot backplane. If you got the two
CPU boards inserted in a backplane, it's probably fine ...
Ohh, you need a power supply to with all needed signals like
DCLO etc. The 50/60 Hz "tick" is not needed for the CPU,
it *might* for the OS to run on it.
> * Plessey PM-DC/11 "status control", P/N 700485-100C
> Plessey PM-K11 "disc control", P/N 700490-101E
> Plessey PM-K11 "data control", P/N 700475-100B
> Plessey PMDC/11 "bus control", P/N 700470-100B
> These are four quad wide boards. I have no clue what they
> are/where good for. No connectors. Some DIP switches.
> If anyone could help me out with some information and/or docs
> - would be great.
My first idea was immediately going to the RK11-D controller for
the RK05 drives. The DEC (equivalent) modules are:
M7254 - status control module
M7255 - disk control module
M7256 - registers module (data path)
M7257 - bus control module
> * Plessey PM-DC1100, P/N 703380-100H
> This hex wide board looks like an Unibus SMD disk controller.
> If it's that I am VERY VERY VERY interested in information
> about that.
> At the place I found the parts there is still an SMD drive....
> It has three 26 pin ribbon connectors and one 60 pin connector.
No clues here ...
> * Plessey memory board (?!), P/N 701830-100G
> Some information about that would be great. If anyone has
> something to share....
Again, I don't know ...
> Ok, if anyone can help me.....
> All the stuff is available to anybody urgently needing it.
> Good night,
> Philipp :-)
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