Search code examples
documentationassemblybootloadermbr

Where to find the source code for a PC MBR Bootloader?

Preferably well comment and with some associated docmentation and a Makefile.

Just for clearity, that's the less than 512 bytes (512 bytes - partition table) of machine code that gets loaded by the Bios and is responsible for chaining to the secondary bootloader in your boot partition.

Edit: Both David's and bdonlan's answers look promising. The minimal Dos link goes to a Debian source package for the MBR, but the commented Windows 2000/XP MBR looks like it has more detailed comments.

Solution

  • Here's someone's commented disassembly of the Windows 2000/XP MBR: http://mirror.href.com/thestarman/asm/mbr/Win2kmbr.htm