PDP-1 Manual, 2025 Edition
Getting Started
Introduction
You don't need the PiDP-1 replica. The software runs and works just fine on any Linux machine, using a virtual front panel instead of the PiDP-1 hardware. And you're very welcome to join the PiDP-1 Google Group without the actual PiDP-1…
Getting Started
Introduction
You don't need the PiDP-1 replica. The software runs and works just fine on any Linux machine, using a virtual front panel instead of the PiDP-1 hardware. And you're very welcome to join the PiDP-1 Google Group without the actual PiDP-1…
PDP-1 Manual, 2025 Edition

 
 
 
 
 
 
 Getting Started 
 
 
 Introduction 
 You don't need the PiDP-1 replica. The software runs and works just fine on any Linux machine, using a virtual front panel instead of the PiDP-1 hardware. And you're very welcome to join the PiDP-1 Google Group without the actual PiDP-1 hardware by the way - our goal is to revive the PDP-1, not necessarily to sell kits.
 Thank you for keeping computer history alive!
 Digital Equipment Corporation introduced their first Programmed Data Processor, the PDP-1, in 1959.
n24usa.com
October 5, 2025 at 10:33 AM
PDP-1 Manual, 2025 Edition
Getting Started
Introduction
You don't need the PiDP-1 replica. The software runs and works just fine on any Linux machine, using a virtual front panel instead of the PiDP-1 hardware. And you're very welcome to join the PiDP-1 Google Group without the actual PiDP-1…
Getting Started
Introduction
You don't need the PiDP-1 replica. The software runs and works just fine on any Linux machine, using a virtual front panel instead of the PiDP-1 hardware. And you're very welcome to join the PiDP-1 Google Group without the actual PiDP-1…
Very much looking forward to building the new PiDP-1 Rack kit that’s just arrived 😍 @oscar-ceds.bsky.social
September 2, 2025 at 11:40 AM
Very much looking forward to building the new PiDP-1 Rack kit that’s just arrived 😍 @oscar-ceds.bsky.social
A new book about the PiDP-10, and what you can do with it. www.qsl.net/zl3dw/PiDP-1...
August 24, 2025 at 3:53 AM
A new book about the PiDP-10, and what you can do with it. www.qsl.net/zl3dw/PiDP-1...
Wow! Wait a minute!
A replica of PiDP-1 and a recreation of Arpanet
Awesome, right ?
A replica of PiDP-1 and a recreation of Arpanet
Awesome, right ?
Newsletter, July 2025
Obsolescence Guaranteed newsletter for June 2025
obsolescence.dev
August 20, 2025 at 10:26 AM
Wow! Wait a minute!
A replica of PiDP-1 and a recreation of Arpanet
Awesome, right ?
A replica of PiDP-1 and a recreation of Arpanet
Awesome, right ?
my website, walking through the Spacewar! code. 😀)
Now, there's a "PiDP-1" coming up and I may be inclined to do a PDP-1 programming course on my blog. Let's see…
PS: The PiDP-1 project:
obsolescence.dev/pdp1.html
Now, there's a "PiDP-1" coming up and I may be inclined to do a PDP-1 programming course on my blog. Let's see…
PS: The PiDP-1 project:
obsolescence.dev/pdp1.html
July 31, 2025 at 12:33 AM
my website, walking through the Spacewar! code. 😀)
Now, there's a "PiDP-1" coming up and I may be inclined to do a PDP-1 programming course on my blog. Let's see…
PS: The PiDP-1 project:
obsolescence.dev/pdp1.html
Now, there's a "PiDP-1" coming up and I may be inclined to do a PDP-1 programming course on my blog. Let's see…
PS: The PiDP-1 project:
obsolescence.dev/pdp1.html
In anticipation of the upcoming PiDP-1, I revisited my "Ironic Computer Space Simulator" (ICSS), a "Computer Space" simulator for the DEC PDP-1, written in 2016.
Sense switch options now default to recommended settings and the score display options have been reworked.
www.masswerk.at/icss
Sense switch options now default to recommended settings and the score display options have been reworked.
www.masswerk.at/icss
Ironic Computer Space Simulator for the DEC PDP-1.
Emulation of the early 1960s PDP-1 running a simulation of Computer Space, the first arcade video game. The program for the PDP-1 has been written in 2016 as part of Retrochallenge 2016/10.
www.masswerk.at
June 2, 2025 at 6:22 AM
In anticipation of the upcoming PiDP-1, I revisited my "Ironic Computer Space Simulator" (ICSS), a "Computer Space" simulator for the DEC PDP-1, written in 2016.
Sense switch options now default to recommended settings and the score display options have been reworked.
www.masswerk.at/icss
Sense switch options now default to recommended settings and the score display options have been reworked.
www.masswerk.at/icss
With the PiDP-1 coming soon, should I start a PDP-1 assembler course, i.e., a related series of blog posts?
Is there any interest?
Is there any interest?
April 11, 2025 at 12:17 PM
With the PiDP-1 coming soon, should I start a PDP-1 assembler course, i.e., a related series of blog posts?
Is there any interest?
Is there any interest?
PiDP-1, or the rebirth of an old machine
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
https://news.ycombinator.com/item?id=43595326
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
https://news.ycombinator.com/item?id=43595326
Finished the first test batch of 5 machines | Details | Hackaday.io
<p>In other words, we increased the number of PDP-1s ever produced by 10% in two days :-)</p><figure><img data-src="https://cdn.hackaday.io/images/6350471743876089180.jpeg" class="lazy"></figure><p>Lots of polishing up still two do. We're hiding from the world for two weeks to get it all done. Probably <i>almost</i> all done. <i>Mostly done.</i></p>
hackaday.io
April 8, 2025 at 12:30 PM
April 8, 2025 at 2:19 AM
April 8, 2025 at 2:16 AM
April 8, 2025 at 2:14 AM
April 8, 2025 at 1:35 AM
PiDP-1, or the rebirth of an old machine
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
[comments] [63 points]
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
[comments] [63 points]
April 8, 2025 at 12:03 AM
PiDP-1, or the rebirth of an old machine
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
[comments] [63 points]
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
[comments] [63 points]
📰 PiDP-1, or the rebirth of an old machine
💬 PiDP-1 sparks nostalgia and excitement; comments reveal a blend of enthusiasm and longing for classic tech! 😄
https://news.ycombinator.com/item?id=43595326
💬 PiDP-1 sparks nostalgia and excitement; comments reveal a blend of enthusiasm and longing for classic tech! 😄
https://news.ycombinator.com/item?id=43595326
April 7, 2025 at 8:15 PM
📰 PiDP-1, or the rebirth of an old machine
💬 PiDP-1 sparks nostalgia and excitement; comments reveal a blend of enthusiasm and longing for classic tech! 😄
https://news.ycombinator.com/item?id=43595326
💬 PiDP-1 sparks nostalgia and excitement; comments reveal a blend of enthusiasm and longing for classic tech! 😄
https://news.ycombinator.com/item?id=43595326
PiDP-1, or the rebirth of an old machine
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
April 7, 2025 at 8:00 PM
PiDP-1, or the rebirth of an old machine
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
PiDP-1, or the rebirth of an old machine Discussion
Finished the first test batch of 5 machines | Details | Hackaday.io
<p>In other words, we increased the number of PDP-1s ever produced by 10% in two days :-)</p><figure><img data-src="https://cdn.hackaday.io/images/6350471743876089180.jpeg" class="lazy"></figure><p>Lots of polishing up still two do. We're hiding from the world for two weeks to get it all done. Probably <i>almost</i> all done. <i>Mostly done.</i></p>
hackaday.io
April 7, 2025 at 7:40 PM
PiDP-1, or the rebirth of an old machine Discussion
PiDP-1, or the rebirth of an old machine
L: https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
C: https://news.ycombinator.com/item?id=43595326
posted on 2025.04.05 at 14:06:09 (c=0, p=7)
L: https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
C: https://news.ycombinator.com/item?id=43595326
posted on 2025.04.05 at 14:06:09 (c=0, p=7)
April 7, 2025 at 7:20 PM
PiDP-1, or the rebirth of an old machine
L: https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
C: https://news.ycombinator.com/item?id=43595326
posted on 2025.04.05 at 14:06:09 (c=0, p=7)
L: https://hackaday.io/project/202541-replica-of-the-pdp-1-pidp-1/log/239666-finished-the-first-test-batch-of-5-machines
C: https://news.ycombinator.com/item?id=43595326
posted on 2025.04.05 at 14:06:09 (c=0, p=7)
Agreed on the Type 30. It's kind of part and parcel of the PDP-1 experience. (It's also a stepping stone towards a Type 340. And hey, a PiDP-6. Geez, it never ends.)
March 8, 2025 at 9:00 AM
Agreed on the Type 30. It's kind of part and parcel of the PDP-1 experience. (It's also a stepping stone towards a Type 340. And hey, a PiDP-6. Geez, it never ends.)
Progress on the new #PiDP-1 (logically, the new PDP-1 replica) is sufficient to open a Hackaday project page for it: hackaday.io/project/2025...
One more month, is the idea, and then it is done! Angelo and I will be doing a two-week sprint that should tie up all the loose ends in April.
One more month, is the idea, and then it is done! Angelo and I will be doing a two-week sprint that should tie up all the loose ends in April.
Replica of the PDP-1: PiDP-1
The DEC PDP-1 was, in many ways, at the root of modern computing: interactive - with keyboard and graphics display. It spawned spacewar, the very first computer video game; teco, the first text editor...
hackaday.io
March 8, 2025 at 3:13 AM
Progress on the new #PiDP-1 (logically, the new PDP-1 replica) is sufficient to open a Hackaday project page for it: hackaday.io/project/2025...
One more month, is the idea, and then it is done! Angelo and I will be doing a two-week sprint that should tie up all the loose ends in April.
One more month, is the idea, and then it is done! Angelo and I will be doing a two-week sprint that should tie up all the loose ends in April.
For its latest trick, the Minitel 1 can now act as an interface for playing music on the PiDP-8/i (which is really a Raspberry Pi in disguise).
This is what the kids describe as "neat".
#minitel #minitel1 #pdp8 #pidp8i #raspberrypi #retrocomputing #RM #kpop
This is what the kids describe as "neat".
#minitel #minitel1 #pdp8 #pidp8i #raspberrypi #retrocomputing #RM #kpop
March 2, 2025 at 3:20 PM
For its latest trick, the Minitel 1 can now act as an interface for playing music on the PiDP-8/i (which is really a Raspberry Pi in disguise).
This is what the kids describe as "neat".
#minitel #minitel1 #pdp8 #pidp8i #raspberrypi #retrocomputing #RM #kpop
This is what the kids describe as "neat".
#minitel #minitel1 #pdp8 #pidp8i #raspberrypi #retrocomputing #RM #kpop
@raw-musicvideos.bsky.social
CLIMATE CHANGE:
What is gonna go down.
Part 1~Panick
Shadows of Power~Part 2
Why: Corporatists vs Labor
-19th & 20th Century.
Part 3~Resolution
best case scenario with Harris/ Democratic Congress.
That hope is gone and fading fast...
www.youtube.com/watch?v=PIdp...
CLIMATE CHANGE:
What is gonna go down.
Part 1~Panick
Shadows of Power~Part 2
Why: Corporatists vs Labor
-19th & 20th Century.
Part 3~Resolution
best case scenario with Harris/ Democratic Congress.
That hope is gone and fading fast...
www.youtube.com/watch?v=PIdp...
~A Trilogy of... Premise~ 2024 *ATMOS
YouTube video by WEITHIN
www.youtube.com
February 2, 2025 at 11:47 PM
@raw-musicvideos.bsky.social
CLIMATE CHANGE:
What is gonna go down.
Part 1~Panick
Shadows of Power~Part 2
Why: Corporatists vs Labor
-19th & 20th Century.
Part 3~Resolution
best case scenario with Harris/ Democratic Congress.
That hope is gone and fading fast...
www.youtube.com/watch?v=PIdp...
CLIMATE CHANGE:
What is gonna go down.
Part 1~Panick
Shadows of Power~Part 2
Why: Corporatists vs Labor
-19th & 20th Century.
Part 3~Resolution
best case scenario with Harris/ Democratic Congress.
That hope is gone and fading fast...
www.youtube.com/watch?v=PIdp...
VCF-CH 2025 in Zürich 18-19.01
January 21, 2025 at 12:40 PM
VCF-CH 2025 in Zürich 18-19.01