MARS.EXE → COM (2021)(chaos.if.uj.edu.pl)
173 pointsby reconnecting7 months ago16 comments
  • skrebbel7 months ago
    The explanation is a great read. It reminds me of Unc's amazing explanation of how they did "cdak", possibly one of the best 4k demos ever made:

    https://web.archive.org/web/20150112121832/https://www.pouet...

    (for completeness, cdak pouet/download page: https://www.pouet.net/prod.php?which=55758 - youtube capture: https://www.youtube.com/watch?v=RCh3Q08HMfs)

    • 1122337 months ago
      yay, another person with a bookmark to webarchive copy of that thread. dune's (Lassi Nikko) post about the making of the music for cdak was equally metal, if a bit too short.
      • skrebbel7 months ago
        yeah so sad that the real page's images linkrotted. Hooray for archive.org!
        • a1o7 months ago
          Uhm, my guess is pouet doesn’t have a image host for those topics so they are linked from external source.
  • reconnecting7 months ago
    Description from pouet.net and how it works (1)

    The Mars demo was written by Elixir's resident graphics guru and Head of R & D Tim Clarke in 1993, whilst he was still at school. Freely distributed on the Internet, the demo soon gained legendary status for its ability to generate fractal terrain and render it real time, all with a meagre 5K. As a result Tim was headhunted to work for space agency Lunacorp in Washington for several summers whilst studying at Cambridge University.

    We recommend running this in DOS mode as it was designed to run on a 386 and may well crash Windows. Remember that this demo was designed for machines that were around in 1993! Use the mouse to move around and press any key to quit.

    (1) https://www.pouet.net/prod_nfo.php?which=4662

    • nopakos7 months ago
      One of the first emails I've sent in my life was to Tim Clarke asking how Mars did work and I was so happy he answered! I remember the graph with the stars.
      • reconnecting7 months ago
        I didn't have any access to email at this time, and Mars looked to me like people somewhere out there were playing with real-time generated 3d virtual worlds while I was stuck with Windows 3.1 forever and no one would rescue me.
    • Agingcoder7 months ago
      I remember mouse control - I didn’t expect in a dos application at the time, and it also felt like a waste of space ( I think you had to fiddle with interrupt 33 or something like that to deal with the mouse which was more complicated than basic port reading )
  • reconnecting7 months ago
    I remember when I saw MARS.EXE for the first time on my 386. That was something absolutely unimaginable for real-time graphics. Pure magic!

    It's fascinating to see that 30 years later someone is still working around its source code.

    • rwmj7 months ago
      I remember when the demo came out (I didn't even know it was called a "demo" at the time). We gathered around it running on one of the lab PCs. It was quite unbelievable that something like it could be done in such a tiny executable.
      • reconnecting7 months ago
        Yeah, I had exact the same fellings.
    • dvh7 months ago
      Have you also tried to reach the end?
    • feiss7 months ago
      same feeling
  • baal80spam7 months ago
    Beautiful.

    For comparison: In Windows 11, Notepad's size, referring to the disk space it occupies, is approximately 25.1 MB according to the Microsoft Store.

    • reconnecting7 months ago
      For comparison, the size of this HTML page + CSS is larger than MARS.EXE was.
      • dcrazy7 months ago
        That seems inevitable, given the webpage contains an assembly listing of MARS.EXE. Mnemonics are larger than machine code.
        • reconnecting7 months ago
          I meant the source of this page, including the transparent pixel image and the logo.
    • GuB-427 months ago
      How did it get that big? On my Windows 10, notepad.exe is 196 kB, I remembered it being under 100 kB, but it did get a few more features in the last years. Anyways, hard to judge considering that a good part of the original Notepad is likely to be standard Win32 components.

      Anyways, none of these "mainsteam" apps hold a candle to sizecoding productions. Just look like what comes out of Lovebyte, a demoparty where no production is above 1 kB.

      • pixl977 months ago
        Win11 notepad has multiple tabs and previous session saving, which is nice. But it also has a bunch of other crap such as copilot integration and it's logged into your Microsoft account.
        • x______________7 months ago
          For anyone interested and I don't see this advice posted anywhere enough, you can uninstall the bloated Win11 notepad version from settings -> apps and Notepad will revert back to the plain text version we all know and love (which now stands at 352kb).
          • Koffiepoeder7 months ago
            One of the lucky 10000 on this one I guess. Thanks!
        • accrual7 months ago
          Microsoft recently added both Copilot integration and rich text formatting (!) options to stock Win11 Notepad. Fortunately, they can be turned off for now.

          I do like that the rich text support allows converting to/from Markdown, but I still prefer plaintext mode.

        • GuB-427 months ago
          So Notepad quickly went from decades of not having the most basic features, like support for UNIX like endings and files larger than a few kBs, to a 25 MB monstrosity...

          As if they tried to avoid the sweet spot the best they could.

        • reconnecting7 months ago
          I thought copilot integration was sarcasm.
      • hypercube337 months ago
        I think they moved it to .net, made it a store app, dark mode and copilot ai.
    • rkagerer7 months ago
      WTF? On Windows 7 it was 189 KB
  • nickdothutton7 months ago
    Reminds me as a kid I spent all my money on a Springer Verlag book on Fractals[1] in the 1988s, and attempted to reproduce some of the forms on a z80 home computer. Very, Very, slowly.

    [1] https://link.springer.com/book/10.1007/978-1-4612-3784-6

  • amiga3867 months ago
    It's a classic demo. The question is, how does the size-reduced version perform on an 80386? (as opposed to a multi-gigahertz machine trusting DOSBox to emulate a 386)
    • fl0id7 months ago
      at the end, it says it was at least tested to compile (and presumably run) on real machines.
  • phkahler7 months ago
    I remember seeing this, reading the high level description of how it works, and doing my own implementation in school. Probably in Turbo Pascal on a 486.
  • shmerl7 months ago
    I remember poking at it in the binary editor and finding a byte that changed the color palette from red base to green and blue.
  • tetris117 months ago
    Ive looked for an online dosbox that would let me load the ASM, but weirdly found nothing.
  • londons_explore7 months ago
    Micro optimization like this to get big size or speed advantages seems to yield huge results, with the downside that it is hugely human labour intensive.

    If we could train AI to do it, it might be a revolution in software performance.

  • 7 months ago
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  • flockonus7 months ago
    Would love seeing this running on the web via WASM or similar :)
  • kragen7 months ago
    Did Mars.exe anticipate Comanche's Voxel Space 3-D rendering algorithm?
  • Andrew_nenakhov7 months ago
    MARS.EXE... Now, that's a name I've not heard in a long time. A long time.
  • HourOrTwo7 months ago
    [dead]
  • 7 months ago
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