MSL OS

A desktop operating system written in mIRC script (mSL), running on the standalone msl-runtime.

Everything is drawn in one picture window by a small window manager: draggable app windows, a taskbar, a Start menu, desktop icons and context menus. Notepad, the file picker, Settings and Run are real mSL dialogs.

Apps

• File Explorer – browse the virtual C:\ disk
• Notepad and Paint – saved to the same virtual disk
• Web Browser – fetches real http:// pages, plus a built-in msl://home
• Terminal – telnet / raw TCP / TLS client with ANSI colour

Running

Get mslrt from msl-runtime, then:

mslrt msl-os.mrc

Or, from inside the runtime, type /mo to boot (or focus the desktop) and /mo.quit to shut down and save.

Terminal demo

terminal-demo.mrc is a tiny ANSI telnet server for trying the Terminal. Run it in a second mslrt:

mslrt terminal-demo.mrc

then in the MSL OS Terminal: telnet 127.0.0.1 2323.

Dev tools

• tools/check-msl.ps1 – brace/paren balance and alias definition checks
• tools/api.ps1 – send lines to a running mslrt control API
• tools/termtest.ps1 – end-to-end Terminal test with a screenshot
• tools/crop.ps1 – crop/zoom a screenshot region

License

MIT, see LICENSE.