John Tsiombikas
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    • Simple z80 computer followup: proper clock - Duration: 45 seconds.

      • 2 days ago
      Followup to my previous "simplest Z80 computer" video: https://www.youtube.com/watch?v=CS44XJt_gYc

      I've added a 555 timer in astable multivibrator mode to drive the clock pin of the processor, ins...
    • Simplest possible homebrew Z80 8-bit computer - Duration: 8 minutes, 25 seconds.

      • 4 days ago
      Update: here's a follow-up video with a 555 timer driving the clock: https://www.youtube.com/watch?v=kSRZ2...
      A laughably simple 8-bit computer I've constructed on a breadboard just for fun. I thin...
    • 3D desktop blobs effect - Duration: 101 seconds.

      • 2 weeks ago
      A silly graphics hack, rendering 3D metaballs with OpenGL in a shaped window, while continuously updating the window shape to match the shape of the metaballs. Source code: https://github.com/jtsio...
    • My FOSSCOMM 2015 Programming for Virtual Reality talk (in greek) - Duration: 32 minutes.

      • 2 months ago
      Video capture of (most of) my fosscomm 2015 talk: Programming for Virtual Reality. The talk was in Greek, so sorry to any of you non-greek speaking viewers, but you aren't missing much. It's just a...
    • Silly Halloween-themed OpenGL demoeffect - Duration: 4 minutes, 9 seconds.

      • 3 months ago
      Silly & boring halloween-themed OpenGL "demo"-effect for the DBF Halloween 2015 competition.
      Download links (source code and binaries for linux/windows/mac): http://nuclear.mutantstargoat.com/sw/db...
    • Zilog Z80 microprocessor chip test circuit - Duration: 81 seconds.

      • 1 year ago
      Minimal test circuit for a Z80 microprocessor chip. The data lines are pulled to ground to emulate reading a string of NOPs from memory, and the clock is pulsed manually to single step fetching and...
    • Singing Blind Guardian's The Bard's Song In the Forest (literally) - Duration: 104 seconds.

      • 1 year ago
      Let us ride to Livadia...
      ... on second thought let's not go there, it is a silly place.
    • Affine vs perspective-correct texture mapping example - Duration: 64 seconds.

      • 1 year ago
      Crappy hack, showing the notable difference between affine texture mapping, and perspective correct texture mapping.

      Based on my crappy (and unfinished) MS-DOS software rendered first person dunge...
    • 3dfx Glide retrocoding - Duration: 26 seconds.

      • 1 year ago
      3dfx glide retrocoding :) Why?
      When I was starting to get into accelerated 3D graphics programming back in 2000-2001, I used to have a 3dfx Voodoo 2 GPU (we didn't call them GPU's back then of cour...
    • Decoding PWM signal from an R/C receiver. - Duration: 114 seconds.

      • 2 years ago
      This video shows an experiment I did, to try and use R/C receiver servo PWM signals, as input to an AVR microcontroller. In this case the microcontroller just prints the input value and pulse width...
    • Absence / The Lab (demo) - Duration: 3 minutes, 32 seconds.

      • 2 years ago
      Absence was the first released demo of my old demogroup: The Lab. It came 3rd at the ReAct 2003 demo competition.

      This was the only demo I've ever written that was "windows only", using my old Dir...
    • spnavcfg2 visualization preview - Duration: 50 seconds.

      • 2 years ago
      I'm writting a new version of the spacenav[1] GUI configuration utility, which will include a real-time visualization of the device input affected by whatever options the user is tweaking interacti...
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