Syslinux - Jul 2006 - does PXE have a BIOS device addr?

I noticed in isolinux that I could use -1 to specify the last boot device,
which is my PXE here (I've got it setup to get called after nothing else
works). I'm wondering, is there a standard address reference for PXE?
Like, floppies are usually addressed as 0x00 and first HD is usually
addressed as 0x80, is there a standard for PXE?

It'd be great to have a reliable "boot from PXE" option and that
seems
like the way to go...

Thanks

-- 
Eric A. Hall                                        http://www.ehsco.com/
Internet Core Protocols          http://www.oreilly.com/catalog/coreprot/

Eric A. Hall wrote:
> I noticed in isolinux that I could use -1 to specify the last boot device,
> which is my PXE here (I've got it setup to get called after nothing
else
> works). I'm wondering, is there a standard address reference for PXE?
> Like, floppies are usually addressed as 0x00 and first HD is usually
> addressed as 0x80, is there a standard for PXE?
No, it doesn't work that way.  The PXE stack can't be initialized if it 
wasn't booted from.
> It'd be great to have a reliable "boot from PXE" option and
that seems
> like the way to go...
You can use Etherboot/gPXE together with ethersel.c32 to create a boot 
from PXE option, however.

	-hpa