Date: Fri, 07 Dec 2001 02:53:34 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: Ian Dowse <iedowse@maths.tcd.ie> Cc: John Baldwin <jhb@FreeBSD.org>, Dmitry Konyshev <daemon@agava.com>, freebsd-hackers@FreeBSD.org Subject: Re: switching to real mode Message-ID: <3C109FAE.4D316E83@mindspring.com> References: <200112061934.aa63585@salmon.maths.tcd.ie>
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Ian Dowse wrote:
[ ... booting another OS that is either real mode or requires the
use of a real mode bootstrap, at FreeBSD shutdown ... ]
> Yeah, I attempted something like this a few years ago without much
> success. I've just updated the code to compile on -stable, and it
> seems to half-work in that it appears to successfully switch to
> real mode and clear the screen using the video BIOS, but then it
> just hangs. That's pretty close to what I remember it doing
> originally, although I think it might have worked before the VM86
> stuff was enabled by default in FreeBSD. Getting this sort of code
> to work reliably is almost impossible... Source is at
Anyone have any code that shuts Windows down to real mode and
boots FreeBSD instead?
That type of code would be *much* more interesting...
-- Terry
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