From: Fabrice Bellard <fabrice@bellard.org>
To: Mike Swanson <mikeonthecomputer@gmail.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Targetting a specific processor type
Date: Sun, 24 Jul 2005 21:23:54 +0200 [thread overview]
Message-ID: <42E3EACA.5070803@bellard.org> (raw)
In-Reply-To: <79bf9848050724115119319857@mail.gmail.com>
Mike Swanson wrote:
> I have a need currently to emulate specifically an 80486 processor,
> nothing lower or higher than that.
>
> Is it possible to configure QEMU in any way to simply emulate a 486,
> or compile it like that?
It is currently not possible, but adding it would be possible: the first
step is to modify the cpu init in target-i386/helper2.c to disable
most of the cpuid bits. The second step is to modify
target-i386/translate.c to test every cpuid bit (it is not done for all
instructions: I did it mostly for MMX/SSE).
Fabrice.
prev parent reply other threads:[~2005-07-24 19:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-24 18:51 [Qemu-devel] Targetting a specific processor type Mike Swanson
2005-07-24 19:23 ` Fabrice Bellard [this message]
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