Goal:

    - examine a variety of bootloaders,  but ONLY look at their 446-byte first stage

    - find one that is fairly well-used and mature

    - however, have it be able to be modified so it LOOKS ONLY FOR THE PARTITION WE SPECIFY

            - to specify a partition, we must be able to hard-code a value in it somehow

    - once it finds the partition we want to to find, it chainloads the VBR




==== GRUB Legacy ====

You can download its source from here:  http://packages.debian.org/squeeze/grub-legacy

It has several embedded variables:
    http://www.gnu.org/software/grub/manual/legacy/grub.html#Embedded-data
These are defined in 'stage1/stage1.S':
    stage1_version
    boot_drive
    force_lba
    stage2_address
    stage2_sector
    stage2_segment

Various discussions of 'stage2_sector':
    http://www.phrack.org/issues.html?issue=63&id=10
    http://thestarman.pcministry.com/asm/mbr/GRUB.htm

http://www.gnu.org/software/grub/manual/legacy/Bootstrap-tricks.html




Where does 'stage2_sector' normally get set?

    util/grub-install.in


==== Grub4DOS ====

grldr.mbr looks for a file called 'grldr'.  This name can be changed:

        http://diddy.boot-land.net/grub4dos/files/grldrmbr.htm



==== Lilo ====

Lilo's 446-byte bootloader looks for a partition with an *active* flag set.