Lockin OS

A tiny 16-bit real-mode OS that boots from a floppy image and provides a simple command shell.

This is intentionally simple. MInimal filesystems, just a boot sector loader and a small kernel loaded from the first track.

Requirements

• Windows PowerShell
• NASM (assembler) in PATH: https://www.nasm.us/
• Optional: QEMU in PATH to run the image: https://www.qemu.org/

Build

1. Open PowerShell in the project root (c:\Users\a\Desktop\Lockin).
2. Run:

powershell -ExecutionPolicy Bypass -File .\build\build.ps1

This produces build/lockinos.img (1.44MB floppy image).

Run (QEMU)

qemu-system-i386 -fda .\build\lockinos.img