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Charles Ess
, …
Kim Colwell
9
2:35 AM
panel lamps on the top left - and top middle - are not fully pushed through the front panel.
thanks again - good to know that I'm on the right track - and my experience with the spring
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panel lamps on the top left - and top middle - are not fully pushed through the front panel.
thanks again - good to know that I'm on the right track - and my experience with the spring
2:35 AM
Bill E
16
Apr 9
Pidp1-mods development log
General cleanup, there were files for other computers such as the tx0, pdp-10, etc. cluttering up the
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Pidp1-mods development log
General cleanup, there were files for other computers such as the tx0, pdp-10, etc. cluttering up the
Apr 9
Steven Fellini
Apr 8
Problem using ET editor
I'm trying to follow some examples with the ET text editor. The problem is with the TAB character
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Problem using ET editor
I'm trying to follow some examples with the ET text editor. The problem is with the TAB character
Apr 8
Bill E
, …
sunnyboy010101
7
Apr 8
How are people using their pidp-1s?
For me, just running stuff. At this point mostly with the HDMI turned off as there's no need
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How are people using their pidp-1s?
For me, just running stuff. At this point mostly with the HDMI turned off as there's no need
Apr 8
sunnyboy010101
, …
Charles Ess
5
Apr 8
boot options
Thanks much for this - it was a helpful start towards solving a similar problem with my build. Based
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boot options
Thanks much for this - it was a helpful start towards solving a similar problem with my build. Based
Apr 8
Phillip Porch, MD
, …
Charles Ess
12
Apr 8
LED colors
I was just sorting through the leftovers from my #248 rack build - lots of spare parts, along with
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LED colors
I was just sorting through the leftovers from my #248 rack build - lots of spare parts, along with
Apr 8
Bill E
,
Sgeo
7
Apr 6
Getting kalah to work
It never occurred to me to check for the lightpen being used. I still don't know why there is
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Getting kalah to work
It never occurred to me to check for the lightpen being used. I still don't know why there is
Apr 6
Luke Shiner
,
Bill E
3
Apr 4
MACRO Symbols Package
Thank you for your response. After posting my original message I did some further digging and
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MACRO Symbols Package
Thank you for your response. After posting my original message I did some further digging and
Apr 4
Bill E
Mar 30
New tool
Since no one volunteered to figure out the rim loader kalah uses, it dawned on me that the pidp-1
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New tool
Since no one volunteered to figure out the rim loader kalah uses, it dawned on me that the pidp-1
Mar 30
Bill E
Mar 28
More error checks in am1
As a result of discussions with Mike G, am1 now enforces some memory checks. These are fairly easy
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More error checks in am1
As a result of discussions with Mike G, am1 now enforces some memory checks. These are fairly easy
Mar 28
MICHAEL GARDI
,
Bill E
3
Mar 28
Fireworks
You are correct, m1 doesn't check a lot of things. Funny you should mention that though, I was
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Fireworks
You are correct, m1 doesn't check a lot of things. Funny you should mention that though, I was
Mar 28
Bill E
,
MICHAEL GARDI
3
Mar 28
Fun with dpy. Or not.
Snowflake_sa-100.bin definitely uses it, but it works fine without it. I don't recall coming
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Fun with dpy. Or not.
Snowflake_sa-100.bin definitely uses it, but it works fine without it. I don't recall coming
Mar 28
John Kennedy
, …
Bill E
12
Mar 26
New iPhone app hopefully useful to PiDP users..
The latest version of the app now includes a tutorial on PDP-1 assembly language. If it seems ok, I
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New iPhone app hopefully useful to PiDP users..
The latest version of the app now includes a tutorial on PDP-1 assembly language. If it seems ok, I
Mar 26
Jeremy Radwan
, …
R Clark
11
Mar 25
#152 is alive! (and a question about "bookshelf mode")
I've also, knock on wood, never killed a switch in all of my projects. Now, I've had bad
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#152 is alive! (and a question about "bookshelf mode")
I've also, knock on wood, never killed a switch in all of my projects. Now, I've had bad
Mar 25
Angelo Papenhoff/aap
, …
Bill E
9
Mar 25
Development log
I'm not ready to push anything new yet, but just to keep you updated i started reworking
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Development log
I'm not ready to push anything new yet, but just to keep you updated i started reworking
Mar 25
Bill E
,
Angelo Papenhoff/aap
2
Mar 25
Searching for the kahla bin
In here: https://bitsavers.org/bits/DEC/pdp1/papertapeImages/20040127/tray1/
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Searching for the kahla bin
In here: https://bitsavers.org/bits/DEC/pdp1/papertapeImages/20040127/tray1/
Mar 25
Angelo Papenhoff/aap
, …
Bill E
15
Mar 25
Drum type 23 and 24
woah that does sound very relevant! would love to know more On Friday, March 20, 2026 at 12:31:59 PM
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Drum type 23 and 24
woah that does sound very relevant! would love to know more On Friday, March 20, 2026 at 12:31:59 PM
Mar 25
Norbert Landsteiner
, …
Angelo Papenhoff/aap
18
Mar 25
PDP-1 Character Generators
I am very tempted to put the 340 at some point as well. my pdp-6 implementation is working well:
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PDP-1 Character Generators
I am very tempted to put the 340 at some point as well. my pdp-6 implementation is working well:
Mar 25
Charles Ess
,
Jeremy Radwan
4
Mar 24
Nice progress - but 2 peculiarities / queries
Perfect - thanks! On Tuesday, March 24, 2026 at 11:17:40 PM UTC+1 wind...@gmail.com wrote: For the
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Nice progress - but 2 peculiarities / queries
Perfect - thanks! On Tuesday, March 24, 2026 at 11:17:40 PM UTC+1 wind...@gmail.com wrote: For the
Mar 24
Bill E
Mar 24
Major upgrade to the audio system
I've reworked the enhanced audio code, spent time determining tuning params, added documentation.
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Major upgrade to the audio system
I've reworked the enhanced audio code, spent time determining tuning params, added documentation.
Mar 24
Bill E
Mar 23
More Type 62 printer questions
The -1C Handbook refers to 'printer status bits', but doesn't say how you check them. The
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More Type 62 printer questions
The -1C Handbook refers to 'printer status bits', but doesn't say how you check them. The
Mar 23
Bill E
,
Clem Cole
5
Mar 22
Type 64 line printer added
Type 62 and 64 now working, and they have vfbs. :) Bill
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Type 64 line printer added
Type 62 and 64 now working, and they have vfbs. :) Bill
Mar 22
Bill E
, …
Norbert Landsteiner
6
Mar 20
Strange dpy 3000 instruction in snowflake
See also the discussion / walk-trough of the code here: https://www.masswerk.at/nowgobang/2019/
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Strange dpy 3000 instruction in snowflake
See also the discussion / walk-trough of the code here: https://www.masswerk.at/nowgobang/2019/
Mar 20
Bill E
,
Angelo Papenhoff/aap
3
Mar 19
Just patting myself on the back...
Thanks, you probably won't like some of the internals. As we talked about, it really doesn't
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Just patting myself on the back...
Thanks, you probably won't like some of the internals. As we talked about, it really doesn't
Mar 19
Angelo Papenhoff/aap
, …
Milo Velimirović
19
Mar 16
Scope simulation
I worked for a VAR briefly in the late '70s who sold mostly 11/34 and 11/34A systems running
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Scope simulation
I worked for a VAR briefly in the late '70s who sold mostly 11/34 and 11/34A systems running
Mar 16
R Clark
,
Matthias Barthel
4
Mar 14
Mounting a tape question
You know I wish there was a command like "pdp1 ptr" that read the sense switches to load a
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Mounting a tape question
You know I wish there was a command like "pdp1 ptr" that read the sense switches to load a
Mar 14
Bill E
, …
Unibus
17
Mar 13
Updates, philosopy, etc.
Hi, The exact response of the P7 phosphor is available and I'd started to document. Most response
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Updates, philosopy, etc.
Hi, The exact response of the P7 phosphor is available and I'd started to document. Most response
Mar 13
Angelo Papenhoff/aap
, …
sunnyboy010101
7
Mar 13
a PiDP...... 5?!?
<sigh> I'm doing it wrong (apparently). I tried running the BLINKY8.txt and then the
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a PiDP...... 5?!?
<sigh> I'm doing it wrong (apparently). I tried running the BLINKY8.txt and then the
Mar 13
Unibus
, …
Bill E
4
Mar 12
ARPANET Implementation
Hi, In my case it is a housing subdivision that has consumed all my time. Thought I might have found
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ARPANET Implementation
Hi, In my case it is a housing subdivision that has consumed all my time. Thought I might have found
Mar 12
Bill E
, …
Angelo Papenhoff/aap
4
Mar 11
Has anyone seen this problem?
i also noticed this occasionally...maybe i should take a look... On Wednesday, March 11, 2026 at 10:
unread,
Has anyone seen this problem?
i also noticed this occasionally...maybe i should take a look... On Wednesday, March 11, 2026 at 10:
Mar 11