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Date:      Tue, 16 Oct 2001 21:34:59 -0700 (PDT)
From:      John Baldwin <jhb@FreeBSD.org>
To:        Thomas Dixon <thomas@vbc.net>
Cc:        hackers@FreeBSD.org
Subject:   RE: Problems with booting of CD-ROM (fwd)
Message-ID:  <XFMail.011016213459.jhb@FreeBSD.org>
In-Reply-To: <Pine.BSF.4.10.10110171606030.394-100000@brunel.uk1.vbc.net>

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On 17-Oct-01 Thomas Dixon wrote:
> 
> 
> On Tue, 16 Oct 2001, John Baldwin wrote:
> 
>> 
>> On 16-Oct-01 Thomas Dixon wrote:
>> > I'm trying to make a bootable CD using the cdboot program that come with
>> > freeBSD in /sys/i386/boot/cdboot.  The computer I'm trying to do this on
>> > definately boots other CDs as it has booted several other CDs.  However
>> > using a CD I've made using mkisofs and cdboot it gives the error;
>> >  
>> >       Your BIOS int 0x13 extensions seem to be disabled.
>> >       It's impossible to boot a CD-ROM without them.
>> >       (BIOS int 0x13 fn 0x4b01 yielded error 1)
>> >  
>> > I'm using an Asus P5A motherboard, there appears to be no way to enable
>> > the int 0x13 extensions in the BIOS and there is nothing in the manual
>> > that refers to these.
>> > 
>> > Any ideas why this error is coming up or how to fix it?
>> 
>> Don't use cdboot or cdldr, they don't qutie work yet. :(
>> 
>> Instead, make a floppy image and use that to boot.
>> 
> I've tried this and I couldn't figure out the syntax for loader.rc to load
> the file system from the cd-rom, any ideas?

You don't really load the filesystem from the CD-ROM as the loader can't read a
CD-ROM right now.  Instead you use a memory filesystem on the floppy image and
use that to boostrap yourself so you can mount the CD.

> - Tom

-- 

John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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