> I want an installboot-style bootfile (like /usr/mdec/biosboot.sym) to be
> able to support cd(4) and cd9660 filesystem.
>
> For example, I have old CD drives that aren't bootable, so I want to be
> able to use a floppy that can support something like: "boot cd0a:netbsd".
>
> Has anyone done that before?
>
> Or any suggestions for hacking the sys/arch/i386/stand/biosboot code to
> support booting from cd device with iso9660 filesystem?
>

AFAIK biosboot reads blocks using BIOS calls, and BIOS does not present
CDROM's as int 10 device when you are not booting from it