PDP-11, or what?
Tim Shoppa
In article <3419C4...@wolfsburg.de>,
Thomas Stets <st...@wolfsburg.de> wrote:
>A few days ago I save something from the garbae heap what I have
>been told was a PDP-11. Since I have never worked (or seen) such
>a beast, I'm not sure what I have here, and how complete it is.
>Maybe someone can give me some information. If you want to
>have a look at the machine, I put some pictures on by website:
>http://www.sds.de/privat/tos/pdp11/
>Details:
>In a wheeled rack are:
> - a case with power supply, 2 fans and a metal box on a hinge
> which contains the cards. (more on the cards later)
> - a similar case, just without the cards
> - a tape drive (for the bog 6250? CPS reels)
> - a case with a 8" floppy and (probably) a hard drive
>Someone has neatly disconnected all cables, so I have no idea
>what belongs where.
>In the first case there are the following cards:
>
> - a card from DIGITAL,marked with
> 5015394-01-D1P2
> KDJ11-A Processor
This is the PDP-11/73 processor board.
> - a card with 4 small connectors, on one of them a short
> ribbon cable with a 25-pin sub-d connector.
> Text: GISC Made in USA Copyright 1982
4 serial lines, one of them presumably the RS-232 console port.
> - a card with a 28-pin connector
> Text:
> Data Systems Design 808836-03-Rev D Made in USA Copyright 1981
That's a 26-pin connector, if you count correctly. This is the
bus interface to the 8" floppy and hard drive.
> - a double wide card
> 2 25-pin connectors
> Text: DILOG DQ130 Copyright 1979
> On the card are, among others, the following chips
> AMD 8039 DP
> AM AM2901BPC
This is a Q-bus to Pertec-formatted tape drive controller. It
presumably connected the 9-track drive in the rack.
> - 2 cards with RAM chips
> 4 rows with 9 Chips MB81256-15 (or, on the other card, HM50256P-15)
> text: 303-0339
> 1 LED
Each card is one megabyte of parity RAM.
Tim. (sho...@triumf.ca)
Bruce Cook
sho...@alph02.triumf.ca (Tim Shoppa) writes:
Nice pictures (What process are you using (film->scanner ?)
This is an 11/73 with a few cards missing (They should all be in the
top of the backplane) (BTW you where holding the backplane upside down)
This will be a Q-bus architecture machine.
Your best bet is to find someone local who knows '11s. The machine is
fairly simple, but someone has obviously removed a few cards, including
the disk controller. You should be able to find a suitable disk controller
without too much trouble.
The boxes:
1) The '11
2) either a blank panel, or hard disk drives hide here
3) Cypher F880
4) Floppy drive (May also contain a hrad disk)
The cards:
1) 11/73 CPU board - needs to be in the first slot (Which it is)
2) 3rd party quad SLU (Serial line unit)
3) Floppy controller most likely
4) Tape coupler - this connects to the tape drive
5) Memory - can't tell what size, count the chips, remembering that
you have 9 bits per byte (parity)
--
...BRU
Bruce Cook, Synonet Corp.
E-Mail: bc...@wantree.com.au
Phone: +061 15 999 330
David C. Jenner
This is a multi-part message in MIME format.
--------------6214A536C8E9D6AE83450E54
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Thomas,
The two top boxes are:
1) Netcom RV1123 or RV1173, the primary backplane
2) Netcom HV1123 or HV1173, an expansion backplane
You may have two cards and a cable that connects the two boxes?
If you ever think about junking the expansion box, think about offering
me the front panel, since I have a box without one!
The floppy/harddisk is probably a Data Systems Design DSD 880. If you
ever try to get this working, I have some docs on it. On the other
hand, if you decide to junk it, think about offering me the front panel,
since I have one without. (Someone didn't like front panels!)
As Tim originally said, the memory cards are each 1MB (4x256).
Thanks,
Dave
dje...@halcyon.com
--------------6214A536C8E9D6AE83450E54
Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf"
Content-Transfer-Encoding: 7bit
Content-Description: Card for David C. Jenner
Content-Disposition: attachment; filename="vcard.vcf"
begin: vcard
fn: David C. Jenner
n: Jenner;David C.
adr: 3153 N.E. 84th Street;;;Seattle;WA;98115-4717;USA
email;internet: dje...@halcyon.com
tel;fax: 206-527-2019
tel;home: 206-527-2018
x-mozilla-cpt: ;0
x-mozilla-html: FALSE
version: 2.1
end: vcard
--------------6214A536C8E9D6AE83450E54--
Thomas Stets
Bruce Cook wrote:
>
> Nice pictures (What process are you using (film->scanner ?)
No, digital camera :-) (Olympus C-800 L)
>
> This is an 11/73 with a few cards missing (They should all be in the
> top of the backplane) (BTW you where holding the backplane upside down)
Oops! :-) Well, it was the only way I could hold it, it's mounted
on a hinge and comes up that way.
>
> This will be a Q-bus architecture machine.
>
> Your best bet is to find someone local who knows '11s. The machine is
> fairly simple, but someone has obviously removed a few cards, including
> the disk controller. You should be able to find a suitable disk controller
> without too much trouble.
>
> The boxes:
>
> 1) The '11
> 2) either a blank panel, or hard disk drives hide here
> 3) Cypher F880
> 4) Floppy drive (May also contain a hrad disk)
>
> The cards:
>
> 1) 11/73 CPU board - needs to be in the first slot (Which it is)
> 2) 3rd party quad SLU (Serial line unit)
> 3) Floppy controller most likely
> 4) Tape coupler - this connects to the tape drive
> 5) Memory - can't tell what size, count the chips, remembering that
> you have 9 bits per byte (parity)
Thanks for the info. Someone else told me card 3 was a controller for
a DSD 880, which combines a floppy and hard disk. (I haven't been able
to boot it yet, though)
We'll see.
Thomas Stets