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• CyberDOS 0.2 – DOS-like shell and BASIC for the Cyberdeck Micro

  Michal • 09/26/2026 at 04:40 • 0 comments

  Cyberdeck Micro now runs CyberDOS 0.2, my own small DOS-like system with a custom CyberBASIC interpreter.

  The main goal was to stop compiling every application directly into the ESP32-S3 firmware. CyberDOS stays in flash, while applications are stored as ordinary .BAS files on the SD card and can be loaded or launched when needed.

  Version 0.2 already supports text, graphics, files, UART, Wi-Fi scanning and system functions. I also rewrote the original Cyberdeck applications as BASIC programs and added a completely new one: a simple Snake game, without changing the firmware at all.

  I also compared the BASIC Mandelbrot program with the original native C++ version. CyberBASIC is much slower, as expected, but the flexibility of adding and editing programs directly on the Cyberdeck is worth it for this project.

  Full article, photos and details: https://www.michaluvbrloh.cz/2026/09/15/cyberdos-0-2/

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