> From: Henk Gooijen
> I have the M8120 and 4 M8121 boards (32kW bipolar RAM). It is a bit
> weird, but in the 11/55 are also two G114 boards (4kW MOS RAM), IIRC.
G114s? Those are the sense/inhibit module from the MM11-U/MJ11. Did you
mean G401s?
If so, one guess as to what happened there is that the machine used to have
two banks of MS11 Fastbus memory, one bipolar, and one MOS, and some of the
boards from the MOS bank (the memory control, and maybe some of the matrix
boards) got removed?
A KB11-[AD] can have two banks of MS11; the only type mixing allowed is that
one can be all bipolar, and one all MOS; within each bank they all have to be
the same. More here:
https://gunkies.org/wiki/MS11_Semiconductor_Memory_System
Interesting factoid: the M8110 and M8120 use the same etch. I'm not sure
quite what the difference is (the MS11-A MM doesn't say, I couldn't find, and
I don't think we have the M8120 engineering drawings, just the M8110);
the M8120 has a bunch of ECO wires on it, and maybe there are component changes
too. (I don't have an M8110 to compare them directly.)
Noel
Sort of an odd request, but I have some LK201-AA keyboards that have (of
course) not got their little black riser feet any more. I don't think
they've ever had them while in my possession, in fact.
If anyone has one, and has the time and interest, could you do me a big
favor and take measurements of them for me? I would like to 3D print
some replacements, so getting the outer dimension is the most critical
part (though I can always measure the inner dimension of the hole they
fit into, too), along with the protrusion of the two clips that fit into
the key of the hole on the bottom of the LK201 keyboard.
I have good pictures of them, just not dimensions, so I think once I
know the size of the critical bits, designing and printing them
shouldn't be too difficult.
Thanks,
-Seth
--
Seth Morabito
Poulsbo, WA, USA
web at loomcom.com
>
>
> On 4/24/21 10:28 PM, Noel Chiappa via cctalk wrote:
> > Noel
> >
> > PS: I wonder how many people here have -11/45's? ISTR one other, but
> they aren't
> > common.
The Rhode Island Computer Museum has two. The pair were the interface
between fire pull boxes and the 911 dispatch system in Brooklyn, NY. Both
have DV11 & DH11 serial controllers. These are capable of the very low baud
rates needed to talk to the fire pull boxes.
https://www.ricomputermuseum.org/collections-gallery/equipment/dec-pdp-11-45
--
Michael Thompson
Some one appears to have three AT&T 3B2/300 manuals, cables diskettes, sadly
in Brazil and has posted some pictures in a Facebook group
https://www.facebook.com/groups/vintagecomputerswapmeet/permalink/3954289997
980016/
You can open the link in an incognito, sandboxed, VPNd session and still see
the post..
Dave
G4UGM
https://www.ebay.com/itm/164815576309
$9570 for a keyboard.
As much as I'd like to find a keyboard for my Lambda's second head, I
somehow doubt that's going to happen. And now I think I need to go find a
really, really (really) safe place to keep the keyboard I *do* have...
- Josh
>//>/Digital DEC 3000 />//>/I have an old DEC 3000 unit that I no longer have time or space for, and />/was wondering what to do with it. />//>/The rear plate shows PE42A-B9, CPU KN17, DEC 3000 600S and the ROM has a />/sticker showing Dec 1989. />//>/I have a video cable but not a suitable monitor so can't fully test it />/but I think it is booting up OK as the diagnostic LED's on the rear show />/11011101 or DD in hex which I think means it has booted OK to console. />//>/It has been running in the past and my last efforts were probably 10+ />/years ago when I installed VMS version 7 with a guest licence. />//>/I also have a few peripherals including a SZ12 disk unit, LK201 />/keyboard, circular mouse and various SCSI and video cables. />//>/It has been stored in my garage which is not totally sealed so it has />/suffered a little corrosion to the rear connectors but it looks
recoverable. />//>/All thoughts and opinions welcome. />//>//
Hi Rob,
I have three DEC 3000 600 machines which don't work with various issues
including multiple cache failures, shorted decoupling capacitors and
power supply issues. They seem to accumulate more issues each time I
get around to looking at them again :-(
If you are willing to part out, I would be interested in your system board
and I/O board to help me get some of my machines sorted out. I guess you
also have a graphics card? I would be interested in that too.
You don't say where you are. I am located in Ireland.
Regards,
Peter Coghlan.
I hadn't considered splitting the components but I can see that would be an option and a lot more manageable boxing up smaller parts for the post office.
I would really prefer to see the unit go in one piece but will keep it in mind as an option.
I am in Cardiff.
I am new to the list so please excuse me for leaving out a few essential
elements of my message.
-----------------
I am in Cardiff in the UK and would prefer collection of the Digital DEC
3000 unit as it is large and heavy and would not be easy to arrange
postage.
I am happy to wait for a few weeks/months until covid restrictions are
fully lifted and would really like the item to go to someone who
appreciates its heritage.
-----------------
I have an old DEC 3000 unit that I no longer have time or space for, and
was wondering what to do with it.
The rear plate shows PE42A-B9, CPU KN17, DEC 3000 600S and the ROM has a
sticker showing Dec 1989.
I have a video cable but not a suitable monitor so can't fully test it
but I think it is booting up OK as the diagnostic LED's on the rear show
11011101 or DD in hex which I think means it has booted OK to console.
It has been running in the past and my last efforts were probably 10+
years ago when I installed VMS version 7 with a guest licence.
I also have a few peripherals including a SZ12 disk unit, LK201
keyboard, circular mouse and various SCSI and video cables.
It has been stored in my garage which is not totally sealed so it has
suffered a little corrosion to the rear connectors but it looks recoverable.
All thoughts and opinions welcome.
Digital DEC 3000
I have an old DEC 3000 unit that I no longer have time or space for, and
was wondering what to do with it.
The rear plate shows PE42A-B9, CPU KN17, DEC 3000 600S and the ROM has a
sticker showing Dec 1989.
I have a video cable but not a suitable monitor so can't fully test it
but I think it is booting up OK as the diagnostic LED's on the rear show
11011101 or DD in hex which I think means it has booted OK to console.
It has been running in the past and my last efforts were probably 10+
years ago when I installed VMS version 7 with a guest licence.
I also have a few peripherals including a SZ12 disk unit, LK201
keyboard, circular mouse and various SCSI and video cables.
It has been stored in my garage which is not totally sealed so it has
suffered a little corrosion to the rear connectors but it looks recoverable.
All thoughts and opinions welcome.
I'm trying to track down a keyboard to complete a system which is proving
quite difficult!
Here is the specific unit: https://i.imgur.com/FsG24G3.jpg
if anyone happened to have one of these spare or know someone who does
please let me know!
