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Angelo Papenhoff/aap
, …
Oscar Vermeulen
20
9/28/25
What are you doing with your PiDP-1
Bill, On Saturday, September 27, 2025 at 1:22:05 PM UTC+2 wjegr...@gmail.com wrote: How are binaries
unread,
What are you doing with your PiDP-1
Bill, On Saturday, September 27, 2025 at 1:22:05 PM UTC+2 wjegr...@gmail.com wrote: How are binaries
9/28/25
Bill E
,
Angelo Papenhoff/aap
7
Mar 6
How is the 16 channel break system supposed to work?
I finally got around to it now. pushed something to my own repo (not yet to pidp1), which i hope is
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How is the 16 channel break system supposed to work?
I finally got around to it now. pushed something to my own repo (not yet to pidp1), which i hope is
Mar 6
Angelo Papenhoff/aap
3
Mar 6
Development log
Time to revive this, it's been a while. finally added lightpen support, only tested with
unread,
Development log
Time to revive this, it's been a while. finally added lightpen support, only tested with
Mar 6
Angelo Papenhoff/aap
,
Bill E
3
Mar 6
Alternative communication channels?
I saw, but you immediately disappeared. i keep saying we (as in humanity) still haven't figured
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Alternative communication channels?
I saw, but you immediately disappeared. i keep saying we (as in humanity) still haven't figured
Mar 6
Bill E
,
Angelo Papenhoff/aap
2
Mar 6
Summary of changes and additions in the mods repo
Thanks! I'm spending the coming week together with Oscar at his place for another pidp-1 sprint.
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Summary of changes and additions in the mods repo
Thanks! I'm spending the coming week together with Oscar at his place for another pidp-1 sprint.
Mar 6
Bill E
, …
Angelo Papenhoff/aap
14
Mar 6
Type 33 symbol generator timing question
wait...why was i not aware of this? i even have the pdf on my machine. need to implement the type 33
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Type 33 symbol generator timing question
wait...why was i not aware of this? i even have the pdf on my machine. need to implement the type 33
Mar 6
Bill E
,
Angelo Papenhoff/aap
2
Mar 6
Is there any way to get the paper tape reader without the type 30 display?
Good point! pdp1_periph will also get support for a second screen in the next few days (that's
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Is there any way to get the paper tape reader without the type 30 display?
Good point! pdp1_periph will also get support for a second screen in the next few days (that's
Mar 6
Bill E
,
Angelo Papenhoff/aap
4
Mar 6
YT vid of Peter Sampson playing more music on the CHM PDP-1
This is indeed an inaccuracy we're aware of. the problem is that it's hard to get feedback on
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YT vid of Peter Sampson playing more music on the CHM PDP-1
This is indeed an inaccuracy we're aware of. the problem is that it's hard to get feedback on
Mar 6
Jeremy Radwan
, …
R Clark
3
Mar 5
#152 is alive! (and a question about "bookshelf mode")
Very Nice collection. One of these days I'd like to add the Altair also. On Thursday, March 5,
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#152 is alive! (and a question about "bookshelf mode")
Very Nice collection. One of these days I'd like to add the Altair also. On Thursday, March 5,
Mar 5
Bill E
,
Jeremy Radwan
5
Mar 3
Varius install cleanup bits added for pidp1-mods, READ if you plan on trying it
Yeah, I'll just do a fresh clone. :-( 17:22:24 /opt/pidp1-mods:$ git pull remote: Enumerating
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Varius install cleanup bits added for pidp1-mods, READ if you plan on trying it
Yeah, I'll just do a fresh clone. :-( 17:22:24 /opt/pidp1-mods:$ git pull remote: Enumerating
Mar 3
Jeremy Radwan
, …
sunnyboy010101
11
Mar 3
#152 - almost done, but one switch doesn't work and LEDs are flickering
I uploaded a spreadsheet with complete test patterns for switches (including controllers) for the
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#152 - almost done, but one switch doesn't work and LEDs are flickering
I uploaded a spreadsheet with complete test patterns for switches (including controllers) for the
Mar 3
Rolf Peters
, …
Jeremy Radwan
7
Mar 2
Ncat: Connection Refused
In some quick testing, I only seem to see the ncat errors the first time I try to start pdp1control
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Ncat: Connection Refused
In some quick testing, I only seem to see the ncat errors the first time I try to start pdp1control
Mar 2
Bill E
Mar 1
Ad1, the new symbolic source-level debugger is released
With documentation, of course. And as usual, I got carried away, but it sure makes debugging easier.
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Ad1, the new symbolic source-level debugger is released
With documentation, of course. And as usual, I got carried away, but it sure makes debugging easier.
Mar 1
Curtis Vaughan (ACSS)
, …
Bill E
3
Mar 1
Raspberry fan?
Same here. My -1 has been running 24/7, cycling thru lines, spacewar, lander, snowflake, and pong.
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Raspberry fan?
Same here. My -1 has been running 24/7, cycling thru lines, spacewar, lander, snowflake, and pong.
Mar 1
briandenley
, …
Paul Birkel
3
Feb 22
I have completed myPiDP-1 rack system: manual instructs me to see WEB RESOURCES section but I cant find any such section
https://obsolescence.dev/pdp1-manual.html On Saturday, February 21, 2026 at 11:30:24 PM UTC-5 b.de...
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I have completed myPiDP-1 rack system: manual instructs me to see WEB RESOURCES section but I cant find any such section
https://obsolescence.dev/pdp1-manual.html On Saturday, February 21, 2026 at 11:30:24 PM UTC-5 b.de...
Feb 22
Bill E
,
Glenn Babecki
2
Feb 21
Teaser for my current project
Aw, you should have followed the parenthetical lead and named it YAD1, or yad1 if your prefer
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Teaser for my current project
Aw, you should have followed the parenthetical lead and named it YAD1, or yad1 if your prefer
Feb 21
Bill E
Feb 18
Light pen now working in the gui app
The line drawing demo and the tracking demo are also now in .../FunStuff/Demos. The program selector
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Light pen now working in the gui app
The line drawing demo and the tracking demo are also now in .../FunStuff/Demos. The program selector
Feb 18
Bill E
,
Guy Sotomayor
4
Feb 17
A bit off-topic, linux question
I decided to switch to a reader thread for the lightpen. It's a lot cleaner than all the poll()
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A bit off-topic, linux question
I decided to switch to a reader thread for the lightpen. It's a lot cleaner than all the poll()
Feb 17
Bill E
,
Paul Birkel
3
Feb 17
Light pen drawing program
That''s the initial light pen locator. Unless a dot is seen, there is no knowledge of where
unread,
Light pen drawing program
That''s the initial light pen locator. Unless a dot is seen, there is no knowledge of where
Feb 17
MICHAEL GARDI
, …
Norbert Landsteiner
15
Feb 12
Playable Version of Lunar Lander for the PDP-1 Uploaded
Another update. As before it can be found in the Files section of the project on Hackaday. I brought
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Playable Version of Lunar Lander for the PDP-1 Uploaded
Another update. As before it can be found in the Files section of the project on Hackaday. I brought
Feb 12
Bill E
Feb 12
Fun with the lightpen
And the drum. And the symbol generator, And the clock. In the latest repo update. Bill
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Fun with the lightpen
And the drum. And the symbol generator, And the clock. In the latest repo update. Bill
Feb 12
Bill E
,
Ian Schofield
2
Feb 11
Yes, the lightpen does pass the diagnostics!
Hi Bill, Just a small patch to consider where I have simulated a circular Light Pen aperture. I have
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Yes, the lightpen does pass the diagnostics!
Hi Bill, Just a small patch to consider where I have simulated a circular Light Pen aperture. I have
Feb 11
Michael Cheponis
Feb 9
Re: [PiDP-1] Digest for pidp-1@googlegroups.com - 4 updates in 1 topic
"The CHM does have a type 33 symgen and there's a pic somewhere of it working. It's not
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Re: [PiDP-1] Digest for pidp-1@googlegroups.com - 4 updates in 1 topic
"The CHM does have a type 33 symgen and there's a pic somewhere of it working. It's not
Feb 9
Bill E
Feb 9
Big update in two of my repos
The disassembler has been updated in its branch, also in the mods branch. The mods dir now has all
unread,
Big update in two of my repos
The disassembler has been updated in its branch, also in the mods branch. The mods dir now has all
Feb 9
Bill E
, …
Unibus
11
Feb 9
Bug in pidp1 emulator?
Interesting. It doesn't seem to be implemented that way in pidp1, I'll dig into it. Yes, the
unread,
Bug in pidp1 emulator?
Interesting. It doesn't seem to be implemented that way in pidp1, I'll dig into it. Yes, the
Feb 9
Ian Schofield
,
Bill E
8
Feb 7
A type 30 display option
And here's the new one running. Lightpen works! And it's pretty, too. Bill
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A type 30 display option
And here's the new one running. Lightpen works! And it's pretty, too. Bill
Feb 7
Bill E
Feb 7
Actually installable pidp1-mods pushed
Thanks to patient help from ke...@mcgrath.name my repo has been updated. You can now install the full
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Actually installable pidp1-mods pushed
Thanks to patient help from ke...@mcgrath.name my repo has been updated. You can now install the full
Feb 7
Bill E
,
Kevin McGrath
4
Feb 5
'lightpen' in action
On Wednesday, February 4, 2026 at 5:46:13 PM UTC-5 ke...@mcgrath.name wrote: I can imagine an actual
unread,
'lightpen' in action
On Wednesday, February 4, 2026 at 5:46:13 PM UTC-5 ke...@mcgrath.name wrote: I can imagine an actual
Feb 5
Bill E
2
Feb 2
Apparent bug in pidp1 completion logic
Argh! Never mind, I'm not sure what I was looking at, but dcp is set and everything seems to be
unread,
Apparent bug in pidp1 completion logic
Argh! Never mind, I'm not sure what I was looking at, but dcp is set and everything seems to be
Feb 2
sunnyboy010101
,
Paul Birkel
2
Feb 2
PiDP-1 rack with HDMI - anyone using a screen blanking?
Good question. BenQ has this to say regarding LCD monitors: "In principle, BenQ monitors are
unread,
PiDP-1 rack with HDMI - anyone using a screen blanking?
Good question. BenQ has this to say regarding LCD monitors: "In principle, BenQ monitors are
Feb 2
Bill E
, …
Matthias Barthel
7
Feb 1
Deduced light pen operation and an implementation path, comments please
After more digging and semi-deciphering the posted PDP-4 diagnostic code, here's what seems to be
unread,
Deduced light pen operation and an implementation path, comments please
After more digging and semi-deciphering the posted PDP-4 diagnostic code, here's what seems to be
Feb 1