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From: "Petr Holub" <hopet@ics.muni.cz>
To: "Kostik Belousov" <kostikbel@gmail.com>
Date: Mon, 8 Oct 2007 23:11:23 +0200
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Cc: current@freebsd.org
Subject: RE: panic on boot
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> The patch exists that modifies BTX to reflect interrupts and requests into
> the real mode, see
> http://people.freebsd.org/~kib/realbtx/
> http://people.freebsd.org/~kib/realbtx/realbtx.2.patch
> 
> You would need to either somehow inplant supplied loader into your CD
> image, or rebuild the whole installation CD with patch applied. Again,
> I cannot guarantee that the patch is relevant for your problem.

Despite you couldn't guarantee it, it really helped and it boots now.
I've used the binary loader available from ~kib site and just replaced
it on the original ISO: mdcondifig -> mount ->
tar cf - | (cd elswhere && tar xvpf -) -> replace the loader -> mkisomages.sh

Thanks a lot,
Petr