One has to wonder about this file.... I'm assuming it just hasn't
been touched very much...

1) Why reset the disk drives iff we're booting from
a floppy?

2) Why override the drive number for the floppy with:
        # XXX Override the drive number.
        movb    $0x00, %dl

3) Why, when we read from floppy, do we do this:
        movl    $0x0001, %ecx   # cyl 0, sector 1
Since the sectors are one-based, doesn't this reread the first stage
for no good reason?
   Oh, nevermind, I just noticed the two stages are amalgamated.