Home / Software

Photo of cryptocurrency, drone, robot
Image: via wiki.xxiivv.com
Software

Varvara OS M/PC Released with Postfix Notation Interface

WireByte Staff · July 7, 2026

Varvara's M/PC operating system has been released, featuring a unique postfix notation interface and file management capabilities. The system is designed to manage files without a file browser and can be used without a keyboard. M/PC is available for Varvara devices, with the option to start it as a BIOS rom.

Key points

  • M/PC is a concatenative operating system for Varvara devices, inspired by Openfirmware.
  • The system uses postfix notation, allowing users to input commands without a file browser.
  • M/PC can be used without a keyboard, with navigation and launching of roms possible through a single prompt interface.
  • The operating system can be started as a BIOS rom, allowing users to boot into M/PC by pressing F4.
  • M/PC will draw an ICN file named 'wallpaperWWxHH.icn' on boot, where WW and HH are the screen's width and height in hexadecimal.

Varvara's M/PC operating system has been released, offering a unique postfix notation interface for file management. Unlike traditional operating systems, M/PC does not require a file browser, allowing users to input commands directly.

The system is designed to be used without a keyboard, with navigation and launching of roms possible through a single prompt interface. This approach provides a streamlined experience, eliminating the need for a file browser.

M/PC can be started as a BIOS rom, allowing users to boot into the operating system by pressing F4. On boot, the system will attempt to draw an ICN file named 'wallpaperWWxHH.icn', where WW and HH are the screen's width and height in hexadecimal.

The release of M/PC marks an interesting development in the world of operating systems, offering a new approach to file management and user interface design.

Sources

WireByte Staff — Editorial Team

The WireByte editorial team synthesises technology news from multiple primary sources, verifies the facts, and links every source. Articles are produced with AI assistance and reviewed under our editorial policy.