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Discussion group for the PiDP-8.
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William Cattey
Jul 4
New branch: upstream-prep, containing zimh integration and redo of front panel integration.
As I dug into the design of a pull request for zimh to accept the Major State (cycle accurate)
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New branch: upstream-prep, containing zimh integration and redo of front panel integration.
As I dug into the design of a pull request for zimh to accept the Major State (cycle accurate)
Jul 4
櫻井孝明
, …
AndyB
5
Jun 29
DIY teletype terminal is now online
Unfortunately, it looks too slow. I suppose it's around five or six characters per second... 2026
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DIY teletype terminal is now online
Unfortunately, it looks too slow. I suppose it's around five or six characters per second... 2026
Jun 29
Jon Jackson
,
R Clark
2
Jun 22
PDP-8/I Powered Potato-Picker from 1968
Thanks for the picture. I would have never thought it was used like that. It is portable after all!
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PDP-8/I Powered Potato-Picker from 1968
Thanks for the picture. I would have never thought it was used like that. It is portable after all!
Jun 22
William Cattey
, …
Bill E
7
Jun 21
New branch: integrate-zimh that integrates a more modern hard fork of SIMH.
I got a reply from Lars, who said, at this time, he is staying focused on an integration with
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New branch: integrate-zimh that integrates a more modern hard fork of SIMH.
I got a reply from Lars, who said, at this time, he is staying focused on an integration with
Jun 21
electron greg
3
Jun 16
Space War using JUST the internal Pi
Does anyone know which file I should be editing to direct the VC8 output to to the Pi's HDMI? On
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Space War using JUST the internal Pi
Does anyone know which file I should be editing to direct the VC8 output to to the Pi's HDMI? On
Jun 16
Steve Tockey
3
Jun 13
Front panel Data Break lamps
All, The code has now been pushed into the Tangentsoft Fossil repository under a branch named
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Front panel Data Break lamps
All, The code has now been pushed into the Tangentsoft Fossil repository under a branch named
Jun 13
Steve Tockey
, …
Clem Cole
7
Jun 11
Up arrow / down arrow command history in simh
On Thu, Jun 11, 2026 at 2:14 PM Steve Tockey <steve...@gmail.com> wrote: Ian and all, I'm
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Up arrow / down arrow command history in simh
On Thu, Jun 11, 2026 at 2:14 PM Steve Tockey <steve...@gmail.com> wrote: Ian and all, I'm
Jun 11
Ian Schofield
, …
Warren Young
5
May 19
Rasperrypi-dev
Hi Bill, I can confirm that the tip of trunk version builds fine using the initial setup from: PiDP-8
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Rasperrypi-dev
Hi Bill, I can confirm that the tip of trunk version builds fine using the initial setup from: PiDP-8
May 19
Mike Katz
May 18
How to stop thepidp-8/i service from starting on boot?
How do I keep the PiDP-8/I SiMH from running on boot? I tried sudo systemctl --user disable pidp8i
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How to stop thepidp-8/i service from starting on boot?
How do I keep the PiDP-8/I SiMH from running on boot? I tried sudo systemctl --user disable pidp8i
May 18
Mike Markowski
, …
Clem Cole
6
May 18
Getting backspace in OS/8
Yikes -- nasty typo -- not all zeros but all ones [holes in all spots] Remember, ASCII is 7 bits. The
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Getting backspace in OS/8
Yikes -- nasty typo -- not all zeros but all ones [holes in all spots] Remember, ASCII is 7 bits. The
May 18
Mike Markowski
,
Steve Tockey
3
May 16
Floats in FOCAL
Thanks, Steve. Yes, that would explain it! Much appreciated. -Mike On Sat, May 16, 2026, 10:40 AM
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Floats in FOCAL
Thanks, Steve. Yes, that would explain it! Much appreciated. -Mike On Sat, May 16, 2026, 10:40 AM
May 16
Mike Katz
,
Warren Young
2
May 15
New Release Issue
On Fri, May 15, 2026 at 18:57 Mike Katz <justme...@gmail.com> wrote: ETOS operating system (
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New Release Issue
On Fri, May 15, 2026 at 18:57 Mike Katz <justme...@gmail.com> wrote: ETOS operating system (
May 15
Mike Katz
2
May 15
ETOS question
Apparently this is normal when logging in as the operator. On 5/15/2026 8:17 PM, Mike Katz wrote: I
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ETOS question
Apparently this is normal when logging in as the operator. On 5/15/2026 8:17 PM, Mike Katz wrote: I
May 15
Mike Katz
May 15
Latest build questions
I have the latest trunk build installed on a unit with an inverted deposit switch on a Pi 3B and
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Latest build questions
I have the latest trunk build installed on a unit with an inverted deposit switch on a Pi 3B and
May 15
Mike Katz
May 14
TSS/8 Question
When I try to change the admin (account 1) password I get the following: PLEASE ENTER DISK QUOTA: 100
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TSS/8 Question
When I try to change the admin (account 1) password I get the following: PLEASE ENTER DISK QUOTA: 100
May 14
electron greg
May 14
Modified rack
I bought an ultra-cheap display rack from Bezos (please forgive me). I repositioned 3 of the
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Modified rack
I bought an ultra-cheap display rack from Bezos (please forgive me). I repositioned 3 of the
May 14
electron greg
,
R Clark
4
May 14
Autostart pipd8i
That works! Thank you so much. Greg On Thursday, 14 May 2026 at 04:51:11 UTC+1 rbclar...@gmail.com
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Autostart pipd8i
That works! Thank you so much. Greg On Thursday, 14 May 2026 at 04:51:11 UTC+1 rbclar...@gmail.com
May 14
electron greg
May 13
Speed of "terminal" when using HDMI on RPi
I am using the simplest setup with a keyboard and HDMI monitor plugged directly into the Raspberry Pi
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Speed of "terminal" when using HDMI on RPi
I am using the simplest setup with a keyboard and HDMI monitor plugged directly into the Raspberry Pi
May 13
Mike Katz
, …
Rick Murphy
19
May 11
Incandescent Lamp Simulation Question with latest build
For the record, there was an adapter from the 8/i's posibus to omnibus : the DW8/E. Requires a
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Incandescent Lamp Simulation Question with latest build
For the record, there was an adapter from the 8/i's posibus to omnibus : the DW8/E. Requires a
May 11
Mike Markowski
,
William Cattey
2
May 9
PDP8 excursions
Cool excursions! For further adventures in the evolution of Adventure on the PDP-8, check out the
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PDP8 excursions
Cool excursions! For further adventures in the evolution of Adventure on the PDP-8, check out the
May 9
Ken Hansen
,
Jeff Jetton
3
May 9
Q: Building PiDP-8 software on RPi 400
So, after a few hours sleep I came back to this and read Mike and Jeff's suggestions, as well as
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Q: Building PiDP-8 software on RPi 400
So, after a few hours sleep I came back to this and read Mike and Jeff's suggestions, as well as
May 9
Mike Markowski
May 7
avahi not on v20260415
After updating to the latest & greatest pidp8i by writing a fresh image to the SD card, I was
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avahi not on v20260415
After updating to the latest & greatest pidp8i by writing a fresh image to the SD card, I was
May 7
Jon Crowell
,
William Cattey
5
May 5
Boot imaged SD card from pidp8i-2026-05-15-trixie.img
Glad to hear things are working for you. -Bill On Sunday, May 3, 2026 at 3:49:24 PM UTC-4 jon.c...@
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Boot imaged SD card from pidp8i-2026-05-15-trixie.img
Glad to hear things are working for you. -Bill On Sunday, May 3, 2026 at 3:49:24 PM UTC-4 jon.c...@
May 5
Curtis Vaughan
,
R Clark
3
May 4
Hill's Blinky(nlights)
Took me a bit to figure this out as following instructions didn't seem to work. Found out first
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Hill's Blinky(nlights)
Took me a bit to figure this out as following instructions didn't seem to work. Found out first
May 4
Mike Markowski
,
William Cattey
4
May 3
os8-cp can't find python lib
The work-around didn't work? DARN! How very odd. The fix I checked into trunk seems to work even
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os8-cp can't find python lib
The work-around didn't work? DARN! How very odd. The fix I checked into trunk seems to work even
May 3
Sven Moritz Hallberg
, …
William Cattey
39
May 3
Inverting the deposit switch in software
I did that bodge-wiring myself. With the latest release, the software can now cope just fine with
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Inverting the deposit switch in software
I did that bodge-wiring myself. With the latest release, the software can now cope just fine with
May 3
William Cattey
, …
Obsolescence
22
May 3
Planning a new releasse in time for VCF East in April 2026.
Hi Steve, Thanks for the feedback on the front panel switch documentation. After having taken some
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Planning a new releasse in time for VCF East in April 2026.
Hi Steve, Thanks for the feedback on the front panel switch documentation. After having taken some
May 3
Michael Underhill
, …
Robert White
4
Apr 28
New ASR-33 teletype emulator with paper tape reader/punch
Pygame does install for me under Windows 11, but it does not install for everyone. It appears that
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New ASR-33 teletype emulator with paper tape reader/punch
Pygame does install for me under Windows 11, but it does not install for everyone. It appears that
Apr 28
r cs
,
Obsolescence
2
Apr 27
Re: [pidp8] Digest for pidp-8@googlegroups.com - 7 updates in 7 topics
On Monday, April 27, 2026 at 11:32:48 PM UTC+2 rcs wrote: Can people who bought kits previously buy a
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Re: [pidp8] Digest for pidp-8@googlegroups.com - 7 updates in 7 topics
On Monday, April 27, 2026 at 11:32:48 PM UTC+2 rcs wrote: Can people who bought kits previously buy a
Apr 27
Rick B
Apr 27
"Portable" PiDP8
Hi, all, I've made my PiDP8 portable. When I built the kit ages ago, I repositioned the Raspberry
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"Portable" PiDP8
Hi, all, I've made my PiDP8 portable. When I built the kit ages ago, I repositioned the Raspberry
Apr 27