Crappy picture of 11/R20

QNX Newsgroups (Archives) qdn.cafe
1

For those of you who are PDP collectors like me (are there any out there? :slight_smile:)
here’s a crappy picture of a very rare PDP-11/R20 I got…

http://www.parse.com/~pdp11/index.html

Cheers,
-RK

–
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at www.parse.com.
Email my initials at parse dot com.

2

“Robert Krten” <nospam88@parse.com> schrieb im Newsbeitrag
news:aga810$oad$1@inn.qnx.com…

For those of you who are PDP collectors like me (are there any out there?
:slight_smile:> )

Hi Robert,
I remeber there is a power supply of a brand new :wink: PDP11 in my
grage…interrested ?

here’s a crappy picture of a very rare PDP-11/R20 I got…

http://www.parse.com/~pdp11/index.html

Cheers,
-RK

–
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at > www.parse.com> .
Email my initials at parse dot com.

3

Peter Weber <pw@dolphin.de> wrote:

“Robert Krten” <> nospam88@parse.com> > schrieb im Newsbeitrag
news:aga810$oad$> 1@inn.qnx.com> …
For those of you who are PDP collectors like me (are there any out there?
:slight_smile:> )
Hi Robert,
I remeber there is a power supply of a brand new > :wink: > PDP11 in my
grage…interrested ?

If you are in Germany, then probably not :slight_smile: the shipping would be
prohibitive :slight_smile: But I’m sure someone else out there might want it…

BTW; any one know how many of the 11/R20’s were made??

Cheers,
-RK

here’s a crappy picture of a very rare PDP-11/R20 I got…

http://www.parse.com/~pdp11/index.html

Cheers,
-RK

–
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at > www.parse.com> .
Email my initials at parse dot com.

–
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at www.parse.com.
Email my initials at parse dot com.

4

You asked that once before. I’m waiting for the answer, or are you asking
because you don’t know?

“Robert Krten” <nospam88@parse.com> wrote in message
news:agke94$k5q$1@inn.qnx.com…

BTW; any one know how many of the 11/R20’s were made??

Cheers,
-RK

5

“Bill Caroselli (Q-TPS)” <QTPS@earthlink.net> wrote:

You asked that once before. I’m waiting for the answer, or are you asking
because you don’t know?

I do not know. There were over 600k PDP-11’s (all types) made since 1970,
but I really suspect that there are not that many 11/R20’s. 11/20’s
maybe, but not the “ruggedized”. For evidence of that, I couldn’t find
any other picture of mention of it on the Whole World Wide Web :slight_smile:

So, I’m waiting for the answer too :slight_smile:

Cheers,
-RK

“Robert Krten” <> nospam88@parse.com> > wrote in message
news:agke94$k5q$> 1@inn.qnx.com> …

BTW; any one know how many of the 11/R20’s were made??

Cheers,
-RK

–
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at www.parse.com.
Email my initials at parse dot com.

6

Peter Weber <pw@dolphin.de> wrote:

If you collect old things, may I have another good old part for you. We call
it ‘runtime memory’ and it stores
1856 bits in a steel wire loop (singing the data;-) at 1.8MHz round trip
time 1031.111usec.
Very interresting technologie! I think it was build 1965 by Siemens AG.
We have used this kind of memory for video RAM in terminal stations.
When the door was closed, the sceen becomes corrupted!
It is small and light (100x160x30mm) and will send it to you if you want.
I have no usage for that since we changed the server memory by bubble memory
:wink:> .

Sure :slight_smile:

These things were also called “delay line” memories, and were found in
old calculators :slight_smile: A transducer would effectively “wiggle” the wire at
high frequency, and the wire would then store the wiggle in a long-ish
loop. The wiggle was then detected at the other end, and regenerated,
along with any new data. Pretty special :slight_smile:

cheers, Peter
“Robert Krten” <> nospam88@parse.com> > schrieb im Newsbeitrag
news:agke94$k5q$> 1@inn.qnx.com> …
Peter Weber <> pw@dolphin.de> > wrote:

“Robert Krten” <> nospam88@parse.com> > schrieb im Newsbeitrag
news:aga810$oad$> 1@inn.qnx.com> …
For those of you who are PDP collectors like me (are there any out
there?
:slight_smile:> )
Hi Robert,
I remeber there is a power supply of a brand new > :wink: > PDP11 in my
grage…interrested ?

If you are in Germany, then probably not > :slight_smile: > the shipping would be
prohibitive > :slight_smile: > But I’m sure someone else out there might want it…
Yes, it is very havy!

BTW; any one know how many of the 11/R20’s were made??

Cheers,
-RK

here’s a crappy picture of a very rare PDP-11/R20 I got…

http://www.parse.com/~pdp11/index.html

Cheers,
-RK

–
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at www.parse.com.
Email my initials at parse dot com.

7

If you collect old things, may I have another good old part for you. We call
it ‘runtime memory’ and it stores
1856 bits in a steel wire loop (singing the data;-) at 1.8MHz round trip
time 1031.111usec.
Very interresting technologie! I think it was build 1965 by Siemens AG.
We have used this kind of memory for video RAM in terminal stations.
When the door was closed, the sceen becomes corrupted!
It is small and light (100x160x30mm) and will send it to you if you want.
I have no usage for that since we changed the server memory by bubble memory
:wink:.
cheers, Peter
“Robert Krten” <nospam88@parse.com> schrieb im Newsbeitrag
news:agke94$k5q$1@inn.qnx.com…

Peter Weber <> pw@dolphin.de> > wrote:

“Robert Krten” <> nospam88@parse.com> > schrieb im Newsbeitrag
news:aga810$oad$> 1@inn.qnx.com> …
For those of you who are PDP collectors like me (are there any out
there?
:slight_smile:> )
Hi Robert,
I remeber there is a power supply of a brand new > :wink: > PDP11 in my
grage…interrested ?

If you are in Germany, then probably not > :slight_smile: > the shipping would be
prohibitive > :slight_smile: > But I’m sure someone else out there might want it…
Yes, it is very havy!

BTW; any one know how many of the 11/R20’s were made??

Cheers,
-RK

here’s a crappy picture of a very rare PDP-11/R20 I got…

http://www.parse.com/~pdp11/index.html

Cheers,
-RK

8

“Robert Krten” <nospam88@parse.com> wrote in message
news:agkgvt$li5$1@inn.qnx.com…

I do not know. There were over 600k PDP-11’s (all types) made since 1970,
but I really suspect that there are not that many 11/R20’s. 11/20’s
maybe, but not the “ruggedized”. For evidence of that, I couldn’t find
any other picture of mention of it on the Whole World Wide Web > :slight_smile:

Oh the WWWW!

9

please send me your postal address via email to pw@dolphin.de.
cheers, Peter
“Robert Krten” <nospam88@parse.com> schrieb im Newsbeitrag
news:agki6b$mn5$1@inn.qnx.com…

Peter Weber <> pw@dolphin.de> > wrote:
If you collect old things, may I have another good old part for you. We
call
it ‘runtime memory’ and it stores
1856 bits in a steel wire loop (singing the data;-) at 1.8MHz round trip
time 1031.111usec.
Very interresting technologie! I think it was build 1965 by Siemens AG.
We have used this kind of memory for video RAM in terminal stations.
When the door was closed, the sceen becomes corrupted!
It is small and light (100x160x30mm) and will send it to you if you
want.
I have no usage for that since we changed the server memory by bubble
memory
:wink:> .

Sure > :slight_smile:

These things were also called “delay line” memories, and were found in
old calculators > :slight_smile: > A transducer would effectively “wiggle” the wire at
high frequency, and the wire would then store the wiggle in a long-ish
loop. The wiggle was then detected at the other end, and regenerated,
along with any new data. Pretty special > :slight_smile:

cheers, Peter
“Robert Krten” <> nospam88@parse.com> > schrieb im Newsbeitrag
news:agke94$k5q$> 1@inn.qnx.com> …
Peter Weber <> pw@dolphin.de> > wrote:

“Robert Krten” <> nospam88@parse.com> > schrieb im Newsbeitrag
news:aga810$oad$> 1@inn.qnx.com> …
For those of you who are PDP collectors like me (are there any out
there?
:slight_smile:> )
Hi Robert,
I remeber there is a power supply of a brand new > :wink: > PDP11 in my
grage…interrested ?

If you are in Germany, then probably not > :slight_smile: > the shipping would be
prohibitive > :slight_smile: > But I’m sure someone else out there might want it…
Yes, it is very havy!

BTW; any one know how many of the 11/R20’s were made??

Cheers,
-RK

here’s a crappy picture of a very rare PDP-11/R20 I got…

http://www.parse.com/~pdp11/index.html

Cheers,
-RK



\

Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at > www.parse.com> .
Email my initials at parse dot com.

10

Robert Krten wrote:
I used the LSI-11 that came along just a bit later. My systems featured
wide slots but all the boards were only half width. To keep them from
flopping around in the centre we stuffed foam behind the cover and
screwed it down real tight.


John



For those of you who are PDP collectors like me (are there any out there? > :slight_smile:> )
here’s a crappy picture of a very rare PDP-11/R20 I got…

http://www.parse.com/~pdp11/index.html

Cheers,
-RK

11

Bill Caroselli (Q-TPS) <QTPS@EarthLink.net> wrote in article <agkg6v$l7c$1@inn.qnx.com>…

You asked that once before. I’m waiting for the answer, or are you asking
because you don’t know?

Bill,
Just because we are at cafe I venture to ask encounter question… What’s reason to ask if you do
know the answer?

Eduard.
ed1k at ukr dot net

12

john Halpenny <j.halpenny@rogers.com> wrote:

Robert Krten wrote:
I used the LSI-11 that came along just a bit later. My systems featured
wide slots but all the boards were only half width. To keep them from
flopping around in the centre we stuffed foam behind the cover and
screwed it down real tight.

Yah, I got a few of those that need resurrecting. One’s an LSI-11, and
the other is an LSI-11/2 :slight_smile:

Cheers,
-RK

John



For those of you who are PDP collectors like me (are there any out there? > :slight_smile:> )
here’s a crappy picture of a very rare PDP-11/R20 I got…

http://www.parse.com/~pdp11/index.html

Cheers,
-RK

–
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at www.parse.com.
Email my initials at parse dot com.

13

Oh I don’t know. I thought it might be something like:
RK: Does anyone know how many were made?
US: Gee, no. How many?
RK: There were only 3 made and I have one of them.

I thought it was just a challenge question, like,

What’s the weight of the Eiffel Tower?


“ed1k” <ed1k@spamerstrap.com> wrote in message
news:01c2297d$606e7e20$106fa8c0@ED1K…

Bill Caroselli (Q-TPS) <> QTPS@EarthLink.net> > wrote in article
agkg6v$l7c$> 1@inn.qnx.com> >…
You asked that once before. I’m waiting for the answer, or are you
asking
because you don’t know?


Bill,
Just because we are at cafe I venture to ask encounter question… What’s
reason to ask if you do
know the answer?

Eduard.
ed1k at ukr dot net

14

“Bill Caroselli (Q-TPS)” <QTPS@earthlink.net> wrote:

Oh I don’t know. I thought it might be something like:
RK: Does anyone know how many were made?
US: Gee, no. How many?
RK: There were only 3 made and I have one of them.

Well, I’d venture to guess there were more than 3 made…
But the PDP-12 I have is one of 730 or so :slight_smile:
(So, “How many PDP-12’s were made?”)

I thought it was just a challenge question, like,

What’s the weight of the Eiffel Tower?

Bill, what is the weight of the Eiffel Tower? :slight_smile:

Cheers,
-RK

“ed1k” <> ed1k@spamerstrap.com> > wrote in message
news:01c2297d$606e7e20$106fa8c0@ED1K…
Bill Caroselli (Q-TPS) <> QTPS@EarthLink.net> > wrote in article
agkg6v$l7c$> 1@inn.qnx.com> >…
You asked that once before. I’m waiting for the answer, or are you
asking
because you don’t know?


Bill,
Just because we are at cafe I venture to ask encounter question… What’s
reason to ask if you do
know the answer?

Eduard.
ed1k at ukr dot net

–
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at www.parse.com.
Email my initials at parse dot com.

15

“Robert Krten” <nospam88@parse.com> schrieb im Newsbeitrag
news:agn72f$oq0$1@inn.qnx.com…

“Bill Caroselli (Q-TPS)” <> QTPS@earthlink.net> > wrote:
Oh I don’t know. I thought it might be something like:
RK: Does anyone know how many were made?
US: Gee, no. How many?
RK: There were only 3 made and I have one of them.

Well, I’d venture to guess there were more than 3 made…
But the PDP-12 I have is one of 730 or so > :slight_smile:
(So, “How many PDP-12’s were made?”)

I thought it was just a challenge question, like,

What’s the weight of the Eiffel Tower?

Bill, what is the weight of the Eiffel Tower? > :slight_smile:
11,000 tonnes

2,500,000 rivets
329.75m
1652 steps total
water driven elevators :slight_smile:))
cheers, Peter

Cheers,
-RK

“ed1k” <> ed1k@spamerstrap.com> > wrote in message
news:01c2297d$606e7e20$106fa8c0@ED1K…
Bill Caroselli (Q-TPS) <> QTPS@EarthLink.net> > wrote in article
agkg6v$l7c$> 1@inn.qnx.com> >…
You asked that once before. I’m waiting for the answer, or are you
asking
because you don’t know?


Bill,
Just because we are at cafe I venture to ask encounter question…
What’s
reason to ask if you do
know the answer?

Eduard.
ed1k at ukr dot net


\

Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Books, Video-based and Instructor-led
Training and Consulting at > www.parse.com> .
Email my initials at parse dot com.

16

About 40 minutes in the tourist season. ;~}

“Peter Weber” <pw@dolphin.de> wrote in message
news:agn9j3$qqu$1@inn.qnx.com…

“Robert Krten” <> nospam88@parse.com> > schrieb im Newsbeitrag
news:agn72f$oq0$> 1@inn.qnx.com> …
“Bill Caroselli (Q-TPS)” <> QTPS@earthlink.net> > wrote:

What’s the weight of the Eiffel Tower?

Bill, what is the weight of the Eiffel Tower? > :slight_smile:
11,000 tonnes
2,500,000 rivets
329.75m
1652 steps total
water driven elevators > :slight_smile:> ))
cheers, Peter