MAD-65

Tech demo

a demo for MAD-65 · 2nd place, Retro Systems DEMO, NRG 2026

A showcase of the console itself rather than of one game: sprites, bitmap graphics, vectors, FM and PSG sound and speech — all at once, in real time, on a one-bit screen. Each screen says what you are looking at. The demo loops and needs no input.

Author: Mateusz Matysiak. The demo code was written with Claude Code, an AI programming assistant from Anthropic, in collaboration with the author.

Video

MAD-65 tech demo

Download the MAD-65 tech demo (Windows)

ZIP archive, 3.5 MB · includes the simulator and everything needed to run · build 261017

How to run it

  1. Download the ZIP and unpack it anywhere.
  2. Run start_demo.bat. madsim opens with the demo, rotated 90° as on a monitor standing on its side.
  3. Press Esc to quit.

Simulator keys: Space or P pause, M mute, F3 CPU load view, F11 full screen, F12 rotate 90°.

No installer, no dependencies, nothing written outside the folder.