On Wed, Jul 13, 2005 at 08:41:57PM +0100, David Laight wrote:
> On Wed, Jul 13, 2005 at 04:07:30PM +0900, Bang Jun-Young wrote:
> > > 
> > > A few words about my application, since I'm not sure it is supported
> > > by cdboot today.  I have some unattended wireless routers whose BIOS is
> > > too dumb or broken to boot from CD-ROM.  I would like to put the cdboot
> > > primary bootloader onto a floppy disk; the secondary bootloader, kernel,
> > > and ISO9660 root will go onto the CD-ROM.  There might be a bootable
> > > hard drive---or a CompactFlash card, at any rate.  Is this something
> > > that cdboot will support?
> > 
> > Not possible with the current secondary bootloader. It also makes use of
> > the BIOS functions for CD-ROM support.
> 
> On i386 doing PIO based ATA(PI) commands direct to a drive might be
> possible from some of the boot code - I wouldn't like to have to
> squeeze it into the the mbr or pbr code though!
> 
> One issue is identifying the ioaddress of the cdrom device...

And this is not guaranteed to work with SATA drives.

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--