Bootloader

This is a small BIOS bootloader project for x86.

The boot process is split into parts:

• boot.asm is stage 1, the very first boot sector
• boot/stage2.asm is stage 2, which does more setup and loads the kernel
• kernel/main.c is the freestanding kernel code that runs after the bootloader

Build and write to USB

Run:

.\build.ps1 image

This creates build/disk.img, which is the full bootable image.

Write build/disk.img to the USB with Rufus. If Rufus asks, choose raw or DD image mode.

By default, build.ps1 looks for MSYS2 in %LOCALAPPDATA%\msys64. If your MSYS2 installation is somewhere else, set the MSYS2_ROOT environment variable before running the script.

Example:

$env:MSYS2_ROOT = "C:\msys64"
.\build.ps1 image