On Mon, Jan 11, 1999 at 11:10:06PM +0100, Martin Husemann wrote:
>  0 - no emulation
>  1 - 1.2 meg floppy (boot image emulates bios drive 0x00)
>  2 - 1.44 meg floppy
>  3 - 2.88 meg floppy
>  4 - hard disk (boot image emulates bios drive 0x80)
> 
> Both 4 and 0 may be used for arbitrary sized boot images - 4 will pretend to
> boot from hard disk, 0 needs the special access methods defined by El Tority
> to access the CDROM.

The problem with 4 is, that the bios pretending that the CD-ROM drive is
in fact hard disk 0x80 will confuse the hell out of the code that
tries to match BIOS disk numbers with NetBSD devices (needed for
installation to avoid geometry problems, not yet checked in).

- Frank