On 10/23/2021 1:47 PM, Noel Chiappa via cctalk wrote:
To confirm that I'm not BSing you, can someone else on the list
please do this on their KDF11-A, and confirm that it produces the results
I show about? Thanks.
My KDF11-A isn't with me right now, but I tried with my KDF11-BA (and no
other bo
I feel such an idiot! I had minicom set for hardware flow control on the
PC that was connected as the console :-)
I'm sure I remember that as a symptom of no bank 0 memory!
Years ago it would have been the first thing I checked, well maybe not,
I would have had a real VT100 to connect to it. I am
> From: Nigel Johnson Ham
> an 11/23 will not work without bank zero memory
It depends on what you mean by 'work'. If you mean 'ODT does not operate
correctly', or 'the CPU won't run', I can assure you that neither of those
is correct.
Here is a recorded log from a session earlier today
Thanks for the links, but I already have the config data, it was only
the engineering drawings that I lost after I left the DEC business!
The 11/23 you supplied was originally configured to power up through 24,
indicating it was used on a battery-backed-up system, so I changed that
one to go direc
On Sat, Oct 23, 2021 at 10:30 AM Josh Dersch wrote:
>
>
> On Sat, Oct 23, 2021 at 10:12 AM Nigel Johnson Ham via cctalk <
> cctalk@classiccmp.org> wrote:
>
>> It is not possible to get ODT running without bank 0 memory. All I get
>> is output of 173000 and the no ability to input.
>>
>
> How is
On Sat, Oct 23, 2021 at 10:12 AM Nigel Johnson Ham via cctalk <
cctalk@classiccmp.org> wrote:
> It is not possible to get ODT running without bank 0 memory. All I get
> is output of 173000 and the no ability to input.
>
How is your CPU board configured? Based on the above, it sounds like it's
s
It is not possible to get ODT running without bank 0 memory. All I get
is output of 173000 and the no ability to input.
cheers,
Nigel
On 2021-10-23 11:00 a.m., Noel Chiappa via cctalk wrote:
> > From: Nigel Johnson
>
> > I will wait with bated breath!
>
> First things first; did you get
> From: Nigel Johnson
> I will wait with bated breath!
First things first; did you get either/both CPU's running ODT OK
in a system containing just i) the CPU card and ii) the console
serial interface?
Noel
I really appreciate that, all the things I can find under that board
number (which is simple the pcb etch) are from vendors who want to sell
you one and have no idea of the model number.
I too, have no idea of the model number, but have tried search for all
sorts of PM-MSV11 etc with no luck.
I w
Hey, FoothillsGeek here! I saw this thread last night and checked to see if
I had a manual for it - it does not look like I do. Most of the Plessey
documents we received are for core memory boards.
However, when I indexed the docs we received, I did so by model number
(PM-) and not by part num
A couple of comments on a number of things touched on in this thread:
> From: Nigel Johnson Ham
> Ah, well there you see the end of my technical knowledge.
My observation is that since varying QBUS PDP-11 CPU's can be swapped in and
out (unlike UNIBUS PDP-11's, where the CPU's backplane
No luck, there are no 12V traces continued to the edge connector, and
the 5VB goes to a three way jumper post where the jumper is between the
common and 5V
Besides, there are two LEDs on the board that light up, one red one green.
Thanks,
Nigel
On 2021-10-21 10:58 a.m., Chris Zach via cctalk w
On 10/21/2021 9:10 AM, Nigel Johnson Ham via cctalk wrote:
Thanks, but like bitsavers they are all older that the one I have.
To be honest, I never saw anything Plessey bigger than 128kB in the
wild, so I have to wonder what kind of machine this board came from,
although it was in a pile of Q
On 10/20/21 7:10 PM, Nigel Johnson Ham via cctalk wrote:
Thanks for that, but unfortunately it is crashing into ODT and not
accepting input from the console, which I remember was a symptom of no
bank 0 memory.
Now,of course, it could be the receiver chip in the J board (I used to
make a lot of m
Thanks, but like bitsavers they are all older that the one I have.
To be honest, I never saw anything Plessey bigger than 128kB in the
wild, so I have to wonder what kind of machine this board came from,
although it was in a pile of Qbus things that I got the J boards from.
I'm thinking that mayb
> On 10/19/2021 12:57 PM, Nigel Johnson Ham via cctech wrote:
>> I am trying to bring up an 11/23 system in a BA23 box, and the only
>> memory i have is an obscure Plessey one. The only identification is the
>> p/n 705920 with dash-100 in white ink. By counting the chips I make it
>> 4MB, but it
a.m., Joshua Rice via cctech wrote:
>
>
>
> -- Original Message --
> From: "Nigel Johnson Ham via cctech"
> To: "Jerry Weiss via cctech"
> Sent: Thursday, 21 Oct, 2021 At 01:10
> Subject: Re: Looking for info on memory
> Thanks for that, bu
-- Original Message --
From: "Nigel Johnson Ham via cctech"
To: "Jerry Weiss via cctech"
Sent: Thursday, 21 Oct, 2021 At 01:10
Subject: Re: Looking for info on memory
Thanks for that, but unfortunately it is crashing into ODT and not
accepting input from
Thanks for that, but unfortunately it is crashing into ODT and not
accepting input from the console, which I remember was a symptom of no
bank 0 memory.
Now,of course, it could be the receiver chip in the J board (I used to
make a lot of money changing them ) but I have tried two separate J boards
On 10/20/21 12:27 PM, Douglas Taylor via cctech wrote:
On 10/19/2021 12:57 PM, Nigel Johnson Ham via cctech wrote:
I am trying to bring up an 11/23 system in a BA23 box, and the only
memory i have is an obscure Plessey one. The only identification is the
p/n 705920 with dash-100 in white ink. By
On 10/19/2021 12:57 PM, Nigel Johnson Ham via cctech wrote:
I am trying to bring up an 11/23 system in a BA23 box, and the only
memory i have is an obscure Plessey one. The only identification is the
p/n 705920 with dash-100 in white ink. By counting the chips I make it
4MB, but it does not respo
Ah, well there you see the end of my technical knowledge.
When the 11/83 came out, I was already a manager :-)
Thanks for the info, I will try it and report back!
cheers,
Nigel
ps, No way is it PMI mmeory, it is waaay too old!
On 2021-10-19 11:03 p.m., Chris Zach via cctalk wrote:
> It can b
It can be done, technically the 11/83 and 11/93 put the CPU in slot 3
with the PMI memories in slots 1 and 2. Putting the CPU in slot one with
the PMI memory in 2 and 3 would just cause all memory access to slug
across the Q Bus.
So you can leave slots 1 and 2 open if you really want to, makes
In all the hundreds of systems I have shipped, I have never put the CPU
in slot 3! I was VP Operations of Transduction, DEC's biggest components
group OEM in Canada.
No, I don't know if the CPU is good (it is a dual-width KDF11-A btw),
but it is in slot 1 AB with a DLV11J in slot 2AB. The memory
Hm, ok all my Plessy boards are dual height, 1mb boards. Are you sure
the 11/23+ is working, and do you have the CPU in slot 3 with the memory
board in slot 4 (staying away from the PMI slots)?
C
On 10/19/2021 6:51 PM, Nigel Johnson Ham via cctalk wrote:
It's just a memory board and looks lik
It's just a memory board and looks like one!
Picture here:
https://www.mediafire.com/file/ive7i7ax6zdibv3/Screenshot_20211019_185019.png/file
cheers,
Nigel
On 2021-10-19 5:21 p.m., Chris Zach via cctalk wrote:
> Sounds familiar, got a picture of the board somewhere?
>
> C
>
> On 10/19/2021 12
Sounds familiar, got a picture of the board somewhere?
C
On 10/19/2021 12:57 PM, Nigel Johnson Ham via cctalk wrote:
I am trying to bring up an 11/23 system in a BA23 box, and the only
memory i have is an obscure Plessey one. The only identification is the
p/n 705920 with dash-100 in white ink.
I am trying to bring up an 11/23 system in a BA23 box, and the only
memory i have is an obscure Plessey one. The only identification is the
p/n 705920 with dash-100 in white ink. By counting the chips I make it
4MB, but it does not respond. Since it takes the full 22-bit memory
space I can't see ho
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