5 comments

  • kmoser 1 minute ago
    > I don't have an actual paper tape reader, so the object code is directly deposited in memory through the console.

    So, really, a Turing Machine is all you need?

  • kristopolous 8 minutes ago
    I like how the author's "modern" machine to connect to it is still 20 years old.

    With a concave trackpoint, respect.

    BTW, I nag Framework at every conference I go to that people want this shell and keyboard. It's been years. I think it's time to go through the effort to figure out how to do the production run of the case myself. Framework actually wants people to do things like this but you know, manufacturing is hard. Anyone wanna help?

  • arglebarnacle 1 hour ago
    Fascinating. We hear that the leaps in AI have been made possible by orders of magnitude increases in compute and data availability, and of course that’s substantially true—but exactly how true? It’s a nice exercise in perspective to see how much or how little modern machine learning methods would have been capable of if you brought them by time machine to the 70’s and optimized them for that environment.
  • rahen 1 hour ago
    Thanks for reposting! I'm the author of ATTN-11. Happy to answer any questions about the fixed-point arithmetic, the PDP-11 hardware, or the training process.
    • functional_dev 19 minutes ago
      Incredible work! Fitting transformer into 32KB RAM is crazy

      For those who read this project and do not know PDP-11 it could be hard to understand that working with these memory limits is difficult. Here is visual guide for PDP11 architecture - https://vectree.io/c/pdp-11-hardware-architecture

      Thanks for this amazing project!

  • AnimalMuppet 1 hour ago
    Woah. Dude has a running PDP-11/34 in 2026? Personally, I find that more impressive than the program.
    • rahen 56 minutes ago
      That thing is a Tamagochi though, it constantly needs attention, pardon the pun. I did most of the development and tuning on ll-34 for that reason.
      • budman1 1 minute ago
        I am a bit surprised, but I guess everything eventually wears out.

        In the 1980's I worked as a field engineer that supported a lot of pdp-11's. They were very reliable for the time; tape drives and disks were the #1 maintenance items. To actually have to open up the processor and change a board was not a regular activity.

        Other machines of that era, like those from Gould or Perkin/Elmer or DG gave regular practice in the art of repairing processors.

        Guess I expect them to work forever. Like a Toyota.