Groups
Groups
Sign in
Groups
Groups
[PiDP-1]
Conversations
Labels
About
Send feedback
Help
Group path
[PiDP-1]
Contact owners and managers
1–30 of 374
Please visit
the PiDP-1 main page
, and the
Entry to the multiple manual pages is here
.
Mark all as read
Report group
0 selected
Matthias Barthel
Jul 20
My PDP1 plays sound
i build a realistic sound module for my esp32-powered pdp1. the low pass filters are on the
unread,
My PDP1 plays sound
i build a realistic sound module for my esp32-powered pdp1. the low pass filters are on the
Jul 20
Bill E
,
sunnyboy010101
9
Jul 17
New update
Thank you Bill! Just downloaded (I always move the old pidp1-mods to a backup directory before
unread,
New update
Thank you Bill! Just downloaded (I always move the old pidp1-mods to a backup directory before
Jul 17
Bill E
,
sunnyboy010101
33
Jul 17
Pidp1-mods development log
Bill, just downloaded and rebuilt. Significant issues I found: 1. lots of warnings on the compile
unread,
Pidp1-mods development log
Bill, just downloaded and rebuilt. Significant issues I found: 1. lots of warnings on the compile
Jul 17
Carlo Valpiani
, …
AB
7
Jul 17
Is there a PDP-1 programming style / how to guide?
nice work Oscar! cheers, Andy On Tuesday, July 14, 2026 at 8:02:04 AM UTC-4 vermeul...@gmail.com
unread,
Is there a PDP-1 programming style / how to guide?
nice work Oscar! cheers, Andy On Tuesday, July 14, 2026 at 8:02:04 AM UTC-4 vermeul...@gmail.com
Jul 17
Bill E
Jul 17
Limited communication for the next 3 weeks
Out of the country. I will check email and I do have a full build environment on my laptop. I'll
unread,
Limited communication for the next 3 weeks
Out of the country. I will check email and I do have a full build environment on my laptop. I'll
Jul 17
Bill E
Jul 15
DCS2 updated to support telnet
It was just too inconvenient to try to just use a raw serial port. Telnet mode is totally transparent
unread,
DCS2 updated to support telnet
It was just too inconvenient to try to just use a raw serial port. Telnet mode is totally transparent
Jul 15
Bill E
Jul 15
Another demo added, fastCube
In FunStuff/Demos/Type340Demos. This is the earlier rotating cube with high speed tracking and some
unread,
Another demo added, fastCube
In FunStuff/Demos/Type340Demos. This is the earlier rotating cube with high speed tracking and some
Jul 15
Bill E
,
Paul Birkel
3
Jul 15
New predictive motion lightpen library added
Part 2 now checked in. T30dpy and T30dpy3 are updated to send lightpen (mouse) updates at subframe
unread,
New predictive motion lightpen library added
Part 2 now checked in. T30dpy and T30dpy3 are updated to send lightpen (mouse) updates at subframe
Jul 15
Win Heagy
,
Bill E
5
Jul 14
Drum usage for dummies
Truns out there was a bug, it only showed up on the pi 4 with compiler optimization turned on. Tricky
unread,
Drum usage for dummies
Truns out there was a bug, it only showed up on the pi 4 with compiler optimization turned on. Tricky
Jul 14
Bill E
,
Win Heagy
2
Jul 10
Another retro graphics demo added
These graphics demos are very cool and are a great way to show off the machine. Thanks for the
unread,
Another retro graphics demo added
These graphics demos are very cool and are a great way to show off the machine. Thanks for the
Jul 10
Bill E
Jul 8
New cube2 demo coming
I think it's amazingly impressive, but that's just me. I'm running it, will check it in
unread,
New cube2 demo coming
I think it's amazingly impressive, but that's just me. I'm running it, will check it in
Jul 8
Carlo Valpiani
, …
Norbert Landsteiner
5
Jul 7
Help with circle
I found an integer transpose and rotate algorithm at www.geometrictools.com and implemented the
unread,
Help with circle
I found an integer transpose and rotate algorithm at www.geometrictools.com and implemented the
Jul 7
Bill E
Jul 6
Drum IOT update
The Type 23 Drum has been updated to actually cycle-steal and to use real-time determined timing
unread,
Drum IOT update
The Type 23 Drum has been updated to actually cycle-steal and to use real-time determined timing
Jul 6
Bill E
Jul 5
Finally fixed the virtual panel
It now says 'HS CYCLE' like it should. More significantly, the way it turned on and off the
unread,
Finally fixed the virtual panel
It now says 'HS CYCLE' like it should. More significantly, the way it turned on and off the
Jul 5
Bill E
Jul 4
Change to the new hardware panel driver
The brightness setting really wasn't correct. It was a scaling factor applied to all brightness
unread,
Change to the new hardware panel driver
The brightness setting really wasn't correct. It was a scaling factor applied to all brightness
Jul 4
Bill E
Jul 3
Potentially significant performance update
This is a bit embarrassing, a number of the makefiles had debugging turned on for gcc, some left over
unread,
Potentially significant performance update
This is a bit embarrassing, a number of the makefiles had debugging turned on for gcc, some left over
Jul 3
Bill E
Jul 2
Newpanel updates
Major (and tedious) tuning efforts have been made to be sure newpanel is as isolated from scheduler
unread,
Newpanel updates
Major (and tedious) tuning efforts have been made to be sure newpanel is as isolated from scheduler
Jul 2
Bill E
, …
Carlo Valpiani
9
Jul 1
Here's an example of what you can do with the Type 340 display
and here I am struggling to write a program to rotate an ellipse in 2D while trying to learn the
unread,
Here's an example of what you can do with the Type 340 display
and here I am struggling to write a program to rotate an ellipse in 2D while trying to learn the
Jul 1
Bill E
, …
Paul Birkel
10
Jul 1
Recent changes summary
Bugfix in t30dpy.c and t30dpy3.c, an older point could overwrite a newer one, should be the other way
unread,
Recent changes summary
Bugfix in t30dpy.c and t30dpy3.c, an older point could overwrite a newer one, should be the other way
Jul 1
Bill E
,
ChrisK
2
Jun 27
Thanks!
I'm really enjoying writing C in the Arduino ecosystem. It's small, clean and pure. On Sat,
unread,
Thanks!
I'm really enjoying writing C in the Arduino ecosystem. It's small, clean and pure. On Sat,
Jun 27
Bill E
2
Jun 20
Soroban question
No feeback as usual. It really seems this was an implementation fail. I've changed things so red/
unread,
Soroban question
No feeback as usual. It really seems this was an implementation fail. I've changed things so red/
Jun 20
Bill E
, …
Jon Jackson
21
Jun 18
Dragging people screaming and kicking into the future
I still have my SYM-1 SBC with a keyboard, upgraded ROMs including a Digitalker ROM, and an S-100 bus
unread,
Dragging people screaming and kicking into the future
I still have my SYM-1 SBC with a keyboard, upgraded ROMs including a Digitalker ROM, and an S-100 bus
Jun 18
Bill E
Jun 18
Some fun snowflake details
If you've ever wondering just what snowflake is doing to the display, t30dpy can accumulate some
unread,
Some fun snowflake details
If you've ever wondering just what snowflake is doing to the display, t30dpy can accumulate some
Jun 18
Bill E
Jun 18
More t30dpy fixes for the never-ending wayland./labwc bugs
A rendering issue in t30dpy3 specific to the pi using the trixie x11 hardware driver and alpha
unread,
More t30dpy fixes for the never-ending wayland./labwc bugs
A rendering issue in t30dpy3 specific to the pi using the trixie x11 hardware driver and alpha
Jun 18
Bill E
Jun 17
A note on the new panel driver
The linux scheduler on some systems reportedly cause a pause in the panel updates every semi-random
unread,
A note on the new panel driver
The linux scheduler on some systems reportedly cause a pause in the panel updates every semi-random
Jun 17
Bill E
Jun 17
SIgnificant additon to both t30dpy versions
To make it easier to deal with some of the wayland/labwc silliness, you can now drag the window by
unread,
SIgnificant additon to both t30dpy versions
To make it easier to deal with some of the wayland/labwc silliness, you can now drag the window by
Jun 17
Bill E
, …
sunnyboy010101
7
Jun 16
The new panel driver is ready.
Bill, I just downloaded the latest version of your pidp1-mods and installed it (default = all yes). I
unread,
The new panel driver is ready.
Bill, I just downloaded the latest version of your pidp1-mods and installed it (default = all yes). I
Jun 16
Bill E
Jun 16
Success! The CHM test program now works propery!
This took some major effort to fix the light updating in pdp1 and a pretty deep analysis of the
unread,
Success! The CHM test program now works propery!
This took some major effort to fix the light updating in pdp1 and a pretty deep analysis of the
Jun 16
Bill E
,
Carlo Valpiani
6
Jun 16
Pi5, trixie, wayland continued
t30dpy and t30dpy3 now center the window in x11 again. Bill
unread,
Pi5, trixie, wayland continued
t30dpy and t30dpy3 now center the window in x11 again. Bill
Jun 16
Bill E
, …
Carlo Valpiani
10
Jun 16
Very annoying issue using the trixie os release on the pi5
I probably missed something, I'll check it out as I put back window centering under x11. Bill
unread,
Very annoying issue using the trixie os release on the pi5
I probably missed something, I'll check it out as I put back window centering under x11. Bill
Jun 16