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Discussion group for the PiDP-11.
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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
Paul A
, …
Paul Koning
31
Aug 21
RSTS v7 hangs during build
On Aug 20, 2026, at 10:21 PM, 'Paul A' via [PiDP-11] <pid...@googlegroups.com> wrote:
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RSTS v7 hangs during build
On Aug 20, 2026, at 10:21 PM, 'Paul A' via [PiDP-11] <pid...@googlegroups.com> wrote:
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
unread,
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
Jonathan Harston
, …
Clem Cole
41
Aug 9
PDP11 speed
On Sun, Aug 9, 2026 at 1:44 PM Paul Koning <pa0...@gmail.com> wrote: I don't remember the
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PDP11 speed
On Sun, Aug 9, 2026 at 1:44 PM Paul Koning <pa0...@gmail.com> wrote: I don't remember the
Aug 9
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
Mike Katz
Aug 2
PiDP's available at VCF Midwest in September 2026
This message updates the previous message. I have arranged to have a very small number of PiDP kits
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PiDP's available at VCF Midwest in September 2026
This message updates the previous message. I have arranged to have a very small number of PiDP kits
Aug 2
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
Folkert van Heusden
, …
Johnny Billquist
3
May 25
PDP emulators?
As a small contribution. E11 is written by John Wilson, who also runs the company Dbit. And E11 is
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PDP emulators?
As a small contribution. E11 is written by John Wilson, who also runs the company Dbit. And E11 is
May 25
Gregory Latiak
May 24
Raspberrian PiDP terminal icons
Newby here, in the midst of setting up my new PiDP-11/70&Pi5 with latest os and emulator kit.
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Raspberrian PiDP terminal icons
Newby here, in the midst of setting up my new PiDP-11/70&Pi5 with latest os and emulator kit.
May 24
stephan küppers
,
Johnny Billquist
3
May 22
Error using RPM
Hello Johnny! It works!!!! Thank you Stephan b...@softjar.se schrieb am Freitag, 22. Mai 2026 um 12:
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Error using RPM
Hello Johnny! It works!!!! Thank you Stephan b...@softjar.se schrieb am Freitag, 22. Mai 2026 um 12:
May 22
Michael Katzmann
, …
Johnny Billquist
15
May 21
PiDP11 rotary switch issues
Yeah. The state transition table was stupidly wrong. It should be: static int grayShift[ N_ROTARY ][
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PiDP11 rotary switch issues
Yeah. The state transition table was stupidly wrong. It should be: static int grayShift[ N_ROTARY ][
May 21
Mike Katz
, …
terri-...@glaver.org
4
May 20
Latest install
On Tuesday, May 19, 2026 at 1:36:14 PM UTC-4 rene.r...@bluewin.ch wrote: Is the official GitHub
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Latest install
On Tuesday, May 19, 2026 at 1:36:14 PM UTC-4 rene.r...@bluewin.ch wrote: Is the official GitHub
May 20
Jon Lopez
, …
Chuck McManis
12
May 12
Setting PiDP-11 LEDs in C via 2.11BSD?
On Tue, May 12, 2026 at 5:27 PM Johnny Billquist <b...@softjar.se> wrote: Of course. A single
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Setting PiDP-11 LEDs in C via 2.11BSD?
On Tue, May 12, 2026 at 5:27 PM Johnny Billquist <b...@softjar.se> wrote: Of course. A single
May 12
Folkert van Heusden
May 12
blinkenlights & PiDP11
Hi, Another (3d?) PDP-11/70 emulator is now capable of using the LEDs of a PiDP11. I've merged my
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blinkenlights & PiDP11
Hi, Another (3d?) PDP-11/70 emulator is now capable of using the LEDs of a PiDP11. I've merged my
May 12
Johnny Billquist
, …
Jim Fischer
14
May 10
Announcing TCP/IP V2.19 for RSX-11M-PLUS
hmm, i grabbed new one, but same messages.... 14:03:17 IPLOG - ICMP packet with unknown type 9 (0)
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Announcing TCP/IP V2.19 for RSX-11M-PLUS
hmm, i grabbed new one, but same messages.... 14:03:17 IPLOG - ICMP packet with unknown type 9 (0)
May 10