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Date:      Wed, 16 Feb 2000 17:04:25 -0800
From:      Mike Smith <msmith@freebsd.org>
To:        John Baldwin <jhb@FreeBSD.org>
Cc:        Mike Smith <msmith@FreeBSD.org>, freebsd-current@FreeBSD.org, Gerald Abshez <gerald@manhattanprojects.com>, "David E. Cross" <crossd@cs.rpi.edu>
Subject:   Re: Thinkpad won't boot ISO image 
Message-ID:  <200002170104.RAA02112@mass.cdrom.com>
In-Reply-To: Your message of "Wed, 16 Feb 2000 18:46:11 EST." <200002162346.SAA22380@server.baldwin.cx> 

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> 
> On 16-Feb-00 Mike Smith wrote:
> >> This is a problem with the thinkpad BIOS that I have not had the time to be
> >> able to track down.  It would *appear* to be that the BIOS does not do 
> >> int 13 handling on boot cdroms, and the boot/loader makes much use of that 
> >> for loading the kernel and drivers.
> > 
> > The problem with the Thinkpad BIOS is where it puts the emulated floppy 
> > image's disk number - it's not in the 'normal' place, and I don't exactly 
> > know how to deal with it cleanly.  If someone were to lend me a thinkpad 
> > or look at this it would be easy to fix.
> 
> Err, which place?  The emulated device is always BIOS drive 0x00, aka the
> first floppy drive when you are emulating a floppy.

It's not, which is the "Thinkpad CDROM boot problem".  The one report I 
recall put it on 0x87, but I don't have any concrete evidence to suggest 
that it's always there either.

-- 
\\ Give a man a fish, and you feed him for a day. \\  Mike Smith
\\ Tell him he should learn how to fish himself,  \\  msmith@freebsd.org
\\ and he'll hate you for a lifetime.             \\  msmith@cdrom.com




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