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Discussion group for the PiDP-11.
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Paul A
, …
vladim...@gmail.com
41
Sep 18
RSTS v7 hangs during build
Ha! Odd for me to be the one answering the questions! It took me a minute to track them down, and I
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RSTS v7 hangs during build
Ha! Odd for me to be the one answering the questions! It took me a minute to track them down, and I
Sep 18
Carl Marbach
, …
Paul Koning
5
Sep 18
Printer output from SIMh
Great, then on RSTS that should work also. You can copy to LP: or use the spooler if you want, though
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Printer output from SIMh
Great, then on RSTS that should work also. You can copy to LP: or use the spooler if you want, though
Sep 18
Carl Marbach
, …
Jonathan Harston
11
Sep 14
Gettiing from RSTS to Windows and vice versa
Surely somebody could have written a command-line or GUI tool to access the contents of PDP11 disks
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Gettiing from RSTS to Windows and vice versa
Surely somebody could have written a command-line or GUI tool to access the contents of PDP11 disks
Sep 14
Eric N
Sep 13
Fixing a bug in FOCAL-11
I have been tricking out my RSX-11M-PLUS system on my PiDP-11, and was filling the system with all of
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Fixing a bug in FOCAL-11
I have been tricking out my RSX-11M-PLUS system on my PiDP-11, and was filling the system with all of
Sep 13
Eric N
,
Johnny Billquist
4
Sep 9
First-time start-up script bug in Johnny's RSX-11M .dsk image
I downloaded the latest pidp.dsk RSX-11M .dsk image from ftp://ftp.dfupdate.se/pub/pdp11/rsx/pidp/
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First-time start-up script bug in Johnny's RSX-11M .dsk image
I downloaded the latest pidp.dsk RSX-11M .dsk image from ftp://ftp.dfupdate.se/pub/pdp11/rsx/pidp/
Sep 9
Mike Katz
Sep 8
VCFMW and DEC NUT Pizza Party Corrected
I look forward to seeing you at VCF Midwest at the Schaumburg Convention Center this Saturday &
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VCFMW and DEC NUT Pizza Party Corrected
I look forward to seeing you at VCF Midwest at the Schaumburg Convention Center this Saturday &
Sep 8
Mike Katz
Sep 8
VCFMW and DEC NUT Pizza Party
I look forward to seeing you at VCF Midwest at the Schaumburg Convention Center this Saturday &
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VCFMW and DEC NUT Pizza Party
I look forward to seeing you at VCF Midwest at the Schaumburg Convention Center this Saturday &
Sep 8
Jonathan Harston
, …
PDP11 Processor
42
Sep 8
PDP11 speed
No problem until you have to transfer a mag tape from the CDC6600 to an IBM 360. A confident IBM
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PDP11 speed
No problem until you have to transfer a mag tape from the CDC6600 to an IBM 360. A confident IBM
Sep 8
Eric N
,
Johnny Billquist
3
Sep 7
FORTH for RSX/RT-11
I started from the 1.3.3.1 version here: http://www.stackosaurus.com/figforth-1.3.3.1/rl02_figforth-
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FORTH for RSX/RT-11
I started from the 1.3.3.1 version here: http://www.stackosaurus.com/figforth-1.3.3.1/rl02_figforth-
Sep 7
Eric N
,
Johnny Billquist
7
Sep 3
Automatically adjust for Daylight Savings Time in RSX-11
This had actually been my plan. I was going to install your RSX-11M image and go from there. Then I
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Automatically adjust for Daylight Savings Time in RSX-11
This had actually been my plan. I was going to install your RSX-11M image and go from there. Then I
Sep 3
Mike Katz
2
Aug 29
PiDP's available at VCF Midwest in September 2026
This is the last call to pre-order a PiDP-1, PiDP-8, PiDP-10, PiDP-11 or Enigma Touch for pickup at
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PiDP's available at VCF Midwest in September 2026
This is the last call to pre-order a PiDP-1, PiDP-8, PiDP-10, PiDP-11 or Enigma Touch for pickup at
Aug 29
Benoit Maag
, …
Clem Cole
18
Aug 21
Apple IIe as a VT100 terminal for PiDP-11
thanks Paul, below On Fri, Aug 21, 2026 at 9:50 AM Paul Koning <pa0...@gmail.com> wrote: On Aug
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Apple IIe as a VT100 terminal for PiDP-11
thanks Paul, below On Fri, Aug 21, 2026 at 9:50 AM Paul Koning <pa0...@gmail.com> wrote: On Aug
Aug 21
Carl Marbach
, …
Clem Cole
4
Aug 16
vt 420 ON MY pdp-11
Carl, I'll add a small addendum to Paul's comment. The DEC PDP-11 operating systems all
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vt 420 ON MY pdp-11
Carl, I'll add a small addendum to Paul's comment. The DEC PDP-11 operating systems all
Aug 16
Mike Katz
Aug 10
Last Call to purchase a PiDP or enigma touch for pick up at VCF Midwest.
Last Call for pre-orders: I have arranged to have a very small number of PiDP kits available for sale
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Last Call to purchase a PiDP or enigma touch for pick up at VCF Midwest.
Last Call for pre-orders: I have arranged to have a very small number of PiDP kits available for sale
Aug 10
Adam Thornton
, …
Paul Koning
5
Aug 10
A project I did (warning, AI slop)
Yes, that's the one I used as the starting point, then pulled all the RT11 syscalls and
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A project I did (warning, AI slop)
Yes, that's the one I used as the starting point, then pulled all the RT11 syscalls and
Aug 10
Carl Marbach
,
terri-...@glaver.org
2
Aug 9
failure to start
It looks like you are running on a username other than the default "pi" and perhaps using a
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failure to start
It looks like you are running on a username other than the default "pi" and perhaps using a
Aug 9
Milo Velimirović
, …
Clem Cole
7
Aug 8
PiDP11 sighting
Interesting video, although I think the author really misses the boat on a number of points. Intel
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PiDP11 sighting
Interesting video, although I think the author really misses the boat on a number of points. Intel
Aug 8
p q
Aug 3
Re: [PiDP-11] Digest for pidp-11@googlegroups.com - 1 update in 1 topic
I had a PiDP-11 kit at our booth at VCF West where I was showing mostly Unix games on a VT-100
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Re: [PiDP-11] Digest for pidp-11@googlegroups.com - 1 update in 1 topic
I had a PiDP-11 kit at our booth at VCF West where I was showing mostly Unix games on a VT-100
Aug 3
Will Senn
,
johnfo...@gmail.com
2
Jul 31
Dos-11 v08 tape image or rk05 image
There are some DOS-11 DECtapes on bitsavers in bits/DEC/pdp11/dectape. There's some V08 tapes in
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Dos-11 v08 tape image or rk05 image
There are some DOS-11 DECtapes on bitsavers in bits/DEC/pdp11/dectape. There's some V08 tapes in
Jul 31
Mike Katz
Jul 30
PiDP kits available for pickup at VCF Midwest 2026
I have arranged to have a very small number of PiDP kits available for sale at the VCF Midwest show
unread,
PiDP kits available for pickup at VCF Midwest 2026
I have arranged to have a very small number of PiDP kits available for sale at the VCF Midwest show
Jul 30
Neal G.
, …
Paul A
20
Jul 18
PDP-11 C for RT-11 ?
I noticed that, and wasn't trying to make a fuss. Thanks for the response! Paul On Saturday, July
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PDP-11 C for RT-11 ?
I noticed that, and wasn't trying to make a fuss. Thanks for the response! Paul On Saturday, July
Jul 18
Warren Toomey
, …
Johnny Billquist
6
Jul 3
A Network Filesystem for 2.11BSD
We're up to Version 1.0. I've improved the throughput for whole-file transfers to match that
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A Network Filesystem for 2.11BSD
We're up to Version 1.0. I've improved the throughput for whole-file transfers to match that
Jul 3
Michael Katzmann
Jul 3
PDP11 sound
What's missing from the PiDP11 simulation ... sound. Fortunately, the BBC has you covered...
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PDP11 sound
What's missing from the PiDP11 simulation ... sound. Fortunately, the BBC has you covered...
Jul 3
Warren Toomey
Jun 14
C News on 2.11BSD: Easy Installation
I'm back and I've written up the notes for installing C News on 2.11BSD: https://github.com/
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C News on 2.11BSD: Easy Installation
I'm back and I've written up the notes for installing C News on 2.11BSD: https://github.com/
Jun 14
Warren Toomey
, …
Richard McDonald
9
Jun 10
C News on 2.11BSD: help!
A free usenet feed can be obtained at https://www.eternal-september.org. On Wednesday, June 10, 2026
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C News on 2.11BSD: help!
A free usenet feed can be obtained at https://www.eternal-september.org. On Wednesday, June 10, 2026
Jun 10
Dwain Sims
, …
Johnny Billquist
7
Jun 9
Attaching a VT-420 to the PiDP11
To add a few more comments, then. First of all my favorite nitpick: It's a DE9, not a DB9. The
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Attaching a VT-420 to the PiDP11
To add a few more comments, then. First of all my favorite nitpick: It's a DE9, not a DB9. The
Jun 9
Warren Toomey
, …
Johnny Billquist
8
Jun 6
Any word on 2.11BSD pl500?
Hi. On 2026-06-05 22:48, Warren Toomey wrote: > Re: what I would like. These are just my personal
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Any word on 2.11BSD pl500?
Hi. On 2026-06-05 22:48, Warren Toomey wrote: > Re: what I would like. These are just my personal
Jun 6
Daan Muller
, …
Johnny Billquist
21
Jun 4
Attaching a VT-320 to RSX-11
I was just illustrating the parsing effects and process. This was not meant to be an example of how
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Attaching a VT-320 to RSX-11
I was just illustrating the parsing effects and process. This was not meant to be an example of how
Jun 4
steve green
2
Jun 1
How do trace switch problems
I just diagnosed one fault. The LAMP TEST lights all LEDs EXCEPT address LED 3. So that's my
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How do trace switch problems
I just diagnosed one fault. The LAMP TEST lights all LEDs EXCEPT address LED 3. So that's my
Jun 1
Michael Katzmann
, …
terri-...@glaver.org
92
May 28
PiDP11 CONS PHY address lights
On Wednesday, May 27, 2026 at 4:25:44 PM UTC-4 isy...@gmail.com wrote: Thanks for your note.
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PiDP11 CONS PHY address lights
On Wednesday, May 27, 2026 at 4:25:44 PM UTC-4 isy...@gmail.com wrote: Thanks for your note.
May 28