Lars Brinkhoff
@larsbrinkhoff.bsky.social
Messages from an alternative universe where the PDP-10 is alive and well.
October 31, 2025 at 7:19 AM
This book has an important message!
October 15, 2025 at 7:42 AM
This book has an important message!
The LINC had sixels before they were cool.
October 13, 2025 at 7:21 AM
The LINC had sixels before they were cool.
Spacewar on the LINC was early and small.
October 6, 2025 at 8:48 AM
Spacewar on the LINC was early and small.
#MIT AI memo 239 "HAKMEM" now comes with the original files from PDP-10 backup tapes.
dspace.mit.edu/handle/1721....
dspace.mit.edu/handle/1721....
HAKMEM
dspace.mit.edu
September 4, 2025 at 6:12 AM
#MIT AI memo 239 "HAKMEM" now comes with the original files from PDP-10 backup tapes.
dspace.mit.edu/handle/1721....
dspace.mit.edu/handle/1721....
Code for EINE, the first Emacs clone, has appeared.
github.com/MITDDC/eine-...
github.com/MITDDC/eine-...
GitHub - MITDDC/eine-1975-1981: Source code and related files for the text editor EINE from 1975-1981
Source code and related files for the text editor EINE from 1975-1981 - MITDDC/eine-1975-1981
github.com
August 30, 2025 at 7:12 AM
Code for EINE, the first Emacs clone, has appeared.
github.com/MITDDC/eine-...
github.com/MITDDC/eine-...
A list of 39 timesharing systems that are available now for running on emulators. timereshared.com/os-list/
Which time-sharing operating systems can be run via emulation today? · Time Reshared
timereshared.com
August 24, 2025 at 1:05 PM
A list of 39 timesharing systems that are available now for running on emulators. timereshared.com/os-list/
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...
A game for the PDP-5. Help me type it. svn.so-much-stuff.com/svn/trunk/pd...
svn.so-much-stuff.com
June 27, 2025 at 7:29 PM
A game for the PDP-5. Help me type it. svn.so-much-stuff.com/svn/trunk/pd...
Hundreds of DECtapes being processed. icm.museum/blog/?p=241
Archiving DECtapes – INTERIM COMPUTER MUSEUM
icm.museum
June 27, 2025 at 5:25 PM
Hundreds of DECtapes being processed. icm.museum/blog/?p=241
Original CompuServe computer room, 1969. DEC PDP-10 (KA), MA-10 memory cabinets (16K 36 bit words each), RD-10 drum (for swapping), RP02 disk drives, oodles of DECtapes for offline customer storage.
x.com/hkb73/status...
x.com/hkb73/status...
June 27, 2025 at 10:34 AM
Original CompuServe computer room, 1969. DEC PDP-10 (KA), MA-10 memory cabinets (16K 36 bit words each), RD-10 drum (for swapping), RP02 disk drives, oodles of DECtapes for offline customer storage.
x.com/hkb73/status...
x.com/hkb73/status...
The Freeway Crossing game was written by Michael Irrgang in 1971, for the IMLAC PDS-1 computer. He made it for Earl Hunt, who was going to use it to measure reaction times in a psychology study. The game play is similar to the arcade game "Frogger" from 1981.
June 27, 2025 at 6:56 AM
The Freeway Crossing game was written by Michael Irrgang in 1971, for the IMLAC PDS-1 computer. He made it for Earl Hunt, who was going to use it to measure reaction times in a psychology study. The game play is similar to the arcade game "Frogger" from 1981.
Reposted by Lars Brinkhoff
After fighting with QEMU, I finally managed to compile the sources of UniPress Emacs 2.20.
It's really cool to see it working, but I can't type yet due to the keyboard issue that breaks nearly all the NeWS applications.
It's really cool to see it working, but I can't type yet due to the keyboard issue that breaks nearly all the NeWS applications.
June 8, 2025 at 5:41 PM
After fighting with QEMU, I finally managed to compile the sources of UniPress Emacs 2.20.
It's really cool to see it working, but I can't type yet due to the keyboard issue that breaks nearly all the NeWS applications.
It's really cool to see it working, but I can't type yet due to the keyboard issue that breaks nearly all the NeWS applications.
Reposted by Lars Brinkhoff
(hat tip @larsbrinkhoff.bsky.social )
Someone ported TOPS-20 Rogue to FreePascal.
www.youtube.com/watch?v=6yK7...
Someone ported TOPS-20 Rogue to FreePascal.
www.youtube.com/watch?v=6yK7...
Playing a Pascal Version of Rogue on the Tridora-CPU
YouTube video by Tridora-CPU
www.youtube.com
May 20, 2025 at 7:57 PM
(hat tip @larsbrinkhoff.bsky.social )
Someone ported TOPS-20 Rogue to FreePascal.
www.youtube.com/watch?v=6yK7...
Someone ported TOPS-20 Rogue to FreePascal.
www.youtube.com/watch?v=6yK7...
New addition to the Emacs collection: UniPress Emacs V2.20 from 1989.
April 18, 2025 at 4:24 PM
New addition to the Emacs collection: UniPress Emacs V2.20 from 1989.
Reposted by Lars Brinkhoff
I've spent the last few months putting this one together, it's been the most fascinating of rabbit holes. The PDP-10 may not be the best know of mainframes, but it's been hugely influential on the world of computing we have now. youtu.be/ybO6bPcRmlY
I have a PDP-10 Mainframe in my Living room
YouTube video by RetroBytes
youtu.be
March 22, 2025 at 9:43 AM
I've spent the last few months putting this one together, it's been the most fascinating of rabbit holes. The PDP-10 may not be the best know of mainframes, but it's been hugely influential on the world of computing we have now. youtu.be/ybO6bPcRmlY
Reposted by Lars Brinkhoff
March 22 marks the 60th anniversary of the introduction(*) of the Digital Equipment Corporation PDP-8, which more or less introduced the "minicomputer" as a new category of computer. It cost a mere $18,000 and fit on a desk, and while it was a small, simple computer, it became extremely popular.
March 22, 2025 at 6:10 AM
March 22 marks the 60th anniversary of the introduction(*) of the Digital Equipment Corporation PDP-8, which more or less introduced the "minicomputer" as a new category of computer. It cost a mere $18,000 and fit on a desk, and while it was a small, simple computer, it became extremely popular.
New info about the PDP-3/CASINO just dropped. cp4space.hatsya.com/2025/03/18/c...
Charles Corderman’s computer
This is an atypical post, being chiefly about the history of a rather obscure computer that was built in 1960 out of repurposed PDP parts, but it needs to be written somewhere lest it be forgotten.…
cp4space.hatsya.com
March 19, 2025 at 7:00 PM
New info about the PDP-3/CASINO just dropped. cp4space.hatsya.com/2025/03/18/c...
A piece about the PDP-1 and the Arpanet, written by @oscar-ceds.bsky.social. hackaday.io/project/2025...
The PDP-1 and Arpanet | Details | Hackaday.io
<p>We spent the last four days investigating how we can bring our PiDP-1 on Arpanet. Yes, really. Because (1) there is some major history there, and (2) there's a major new project from Lars Brin...
hackaday.io
March 18, 2025 at 9:17 AM
A piece about the PDP-1 and the Arpanet, written by @oscar-ceds.bsky.social. hackaday.io/project/2025...
Reposted by Lars Brinkhoff
PDP1
A subreddit devoted to DEC’s first computer, the PDP-1.
www.reddit.com
March 17, 2025 at 5:38 AM
Happy birthday PDP-10! #OnThisDay 58 years ago, the PDP-10 was first powered on. Whopee, it goes!
March 9, 2025 at 9:48 AM
Happy birthday PDP-10! #OnThisDay 58 years ago, the PDP-10 was first powered on. Whopee, it goes!
Reposted by Lars Brinkhoff
Joining Bluesky - with updates on Obsolescence Guaranteed and the PDP-11, PDP-10, PDP-10 replicas. The main web site: obsolescence.dev
#PiDP-11, #PiDP-10, #PiDP-8
#PiDP-11, #PiDP-10, #PiDP-8
March 8, 2025 at 3:05 AM
Joining Bluesky - with updates on Obsolescence Guaranteed and the PDP-11, PDP-10, PDP-10 replicas. The main web site: obsolescence.dev
#PiDP-11, #PiDP-10, #PiDP-8
#PiDP-11, #PiDP-10, #PiDP-8
Reposted by Lars Brinkhoff
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.
This is my blog about getting the SAIL PDP-10 back onto ARPANET. github.com/larsbrinkhof...
Notes · Issue #1 · larsbrinkhoff/sailing-on-arpanet
Rambling notes from trying to get this 1974 system up on ARPANET. It's host number 11, by the way (13 octal).
github.com
February 7, 2025 at 6:35 AM
This is my blog about getting the SAIL PDP-10 back onto ARPANET. github.com/larsbrinkhof...