7 comments

  • eslaught 2 hours ago
    Post is new but the original PDF is from 2025:

    Previous discussion: https://news.ycombinator.com/item?id=42959775

    • nialv7 1 hour ago
      seems like an account reposting stuff to get attention to advertise his AI stuff.
  • mapt 25 minutes ago
    What reasonably competent PDF-reader applications are not competent enough be Turing-complete?
  • matthewsinclair 3 days ago
    • RegW 12 minutes ago
      > Note: This PDF only works in Chromium-based browsers.

      I thought that PDF was some sort of open standard.

    • ge96 41 minutes ago
      Is there a writeup somewhere on how it works?

      Is it turing complete, runs actual linux binary through wasm or something

      edit: went to tweet RISC-V emulator in PDF

  • robinsonb5 3 days ago
    Just like Doom-in-a-PDF, this is in equal measure incredibly impressive and utterly horrifying that it's possible.
    • anthk 27 minutes ago
      PostSscript files came from the same company in the 80's -Adobe- and with GhostScript and zmachine.ps you can play Zork I-III, Calypso, Tristam Island and the rest of propietary Infocom text adventures on it with ease.

      What zmachine.ps does is to emulate the ZMachine VM in PostScript and display the output to stdout/console.

      And if it werent for the PS stack limitations for sure you could emulate Linux under Risc-V.

      Heck, you can emulate old RISC Linux' syscalls (enough to run static binaries) in Perl without ever calling to C bindings, not even once.

  • karel-3d 49 minutes ago
    This is a low effort blogspam. (Twitterspam?)
    • indigodaddy 25 minutes ago
      It's also all over LinkedIn. It's all just kind of super dumb imo. One of the worst offenders of note was this security person's ad-riddled regurgitation of it that they promoted on LinkedIn:

      https://hackingpassion.com/linux-inside-pdf/

      When I protested about their shitty website shoving ads down my throat, the answer was - I'm paraphrasing of course, but something along the lines of - of course I need ads! I have to cover the cost of my shitty WordPress site (and what are you even thinking to question that!!?? You outta ur mind or somethin?)

      I felt like I was indeed stuck with her in 2010 after that...

  • RajT88 1 hour ago
    butwhy.gif
    • layer8 1 hour ago
      People keep being amazed that Turing-complete mechanisms can run any program. ;)
    • tombert 1 hour ago
      Why climb Mount Everest? Because it's there.
  • cyanydeez 1 hour ago
    Can we use it as an AI sandbox!