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Discussion group for the PiDP-11.
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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
Neal G.
, …
Johnny Billquist
18
May 25
PDP-11 C for RT-11 ?
First of all, the DECtape on a PDP-11 have 512 byte blocks, not 578. And the disk image is exactly
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PDP-11 C for RT-11 ?
First of all, the DECtape on a PDP-11 have 512 byte blocks, not 578. And the disk image is exactly
May 25
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:
unread,
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
Daan Muller
, …
Paulo Rebordão
12
May 10
Trying to get RSX-11M+BQ online
Hi Paulo The network part is a free ip address on my network that gets assigned to the pidp-11 (I
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Trying to get RSX-11M+BQ online
Hi Paulo The network part is a free ip address on my network that gets assigned to the pidp-11 (I
May 10
Rene Richarz
,
terri-...@glaver.org
2
May 9
New version 2.0 of the Tektronix Tek4010 emulator available
On Saturday, May 9, 2026 at 12:44:54 AM UTC-4 rene.r...@bluewin.ch wrote: A new Version 2.0 of the
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New version 2.0 of the Tektronix Tek4010 emulator available
On Saturday, May 9, 2026 at 12:44:54 AM UTC-4 rene.r...@bluewin.ch wrote: A new Version 2.0 of the
May 9
Michael Katzmann
, …
Clem Cole
10
May 8
PDP11/70 memory size and Unix7
Make sure in the file h/systm.h "maxmem" is an unsigned integer, not an int. IIRC, maxmem
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PDP11/70 memory size and Unix7
Make sure in the file h/systm.h "maxmem" is an unsigned integer, not an int. IIRC, maxmem
May 8
Geoff Williams
, …
terri-...@glaver.org
6
May 7
PiDP11 + NVME crashing due to flux residue
On Wednesday, April 29, 2026 at 11:53:06 AM UTC-4 ge...@declarativesystems.com wrote: I've been
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PiDP11 + NVME crashing due to flux residue
On Wednesday, April 29, 2026 at 11:53:06 AM UTC-4 ge...@declarativesystems.com wrote: I've been
May 7
Folkert van Heusden
,
oscarv
3
May 1
blinkenlightsd
Fwiw: got it to work! Apparently every byte for the setcontrols message is encoded in a seperate word
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blinkenlightsd
Fwiw: got it to work! Apparently every byte for the setcontrols message is encoded in a seperate word
May 1
steve...@gmail.com
, …
oscarv
5
Apr 29
Problems in latest PiDP-11 Software?
Steve, Huh! That is worrying. I will look into this tomorrow, it is too late at night right now. Kind
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Problems in latest PiDP-11 Software?
Steve, Huh! That is worrying. I will look into this tomorrow, it is too late at night right now. Kind
Apr 29
Gary Robertson
, …
Johnny Billquist
4
Apr 28
BASIC PLUS 2 on RSX11 M-PLUS
The SHOW command don't show what exists. It shows your current selection. You can change that
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BASIC PLUS 2 on RSX11 M-PLUS
The SHOW command don't show what exists. It shows your current selection. You can change that
Apr 28
Hugh Fisher
, …
oscarv
14
Apr 27
PiDP-11 and Pi Zero 2 W - recent experiences?
For the PiDP replica's, the price hikes in Raspberry Pi's are not so bad. The 1GB RAM model
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PiDP-11 and Pi Zero 2 W - recent experiences?
For the PiDP replica's, the price hikes in Raspberry Pi's are not so bad. The 1GB RAM model
Apr 27
oscarv
Apr 27
Newsletter & Parts tester
All, With apologies for not being online as much as I should: the latest 'Newsletter' with a
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Newsletter & Parts tester
All, With apologies for not being online as much as I should: the latest 'Newsletter' with a
Apr 27
Three Jeeps
, …
Todd Goodman
5
Apr 26
qbone and unibone availability
Hi Mark (and all in the group,) I'm sorry, my mistake on the qbone. I have the qprobe, not the
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qbone and unibone availability
Hi Mark (and all in the group,) I'm sorry, my mistake on the qbone. I have the qprobe, not the
Apr 26
Eric N
,
Johnny Billquist
4
Apr 22
Automatically adjust for Daylight Savings Time in RSX-11
Hi. On 2026-04-22 00:57, Eric N wrote: > This is great, thanks. I'll have to install your RSX-
unread,
Automatically adjust for Daylight Savings Time in RSX-11
Hi. On 2026-04-22 00:57, Eric N wrote: > This is great, thanks. I'll have to install your RSX-
Apr 22
Rene Richarz
, …
Johnny Billquist
6
Apr 14
Tektronix 4010 emulator on PiDP-11 (2.11BSD)
The characters will pass just fine when you type the file. But you probably want to make sure wrap is
unread,
Tektronix 4010 emulator on PiDP-11 (2.11BSD)
The characters will pass just fine when you type the file. But you probably want to make sure wrap is
Apr 14
steve...@gmail.com
, …
John Hudak
3
Apr 13
Interesting new YouTube video from Dave's Garage
Thanks....I like the presenters style and he is right on. In 1989-1990 I built and trained a 6 input
unread,
Interesting new YouTube video from Dave's Garage
Thanks....I like the presenters style and he is right on. In 1989-1990 I built and trained a 6 input
Apr 13
Jack Wilkinson
, …
Johnny Billquist
10
Apr 8
APL for PiDP11 ??
Thank for reminding me, as well as filling in a bit more detail on the story. I only remember that I
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APL for PiDP11 ??
Thank for reminding me, as well as filling in a bit more detail on the story. I only remember that I
Apr 8