* [Qemu-devel] Targetting a specific processor type
@ 2005-07-24 18:51 Mike Swanson
2005-07-24 19:23 ` Fabrice Bellard
0 siblings, 1 reply; 2+ messages in thread
From: Mike Swanson @ 2005-07-24 18:51 UTC (permalink / raw)
To: qemu-devel
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?
--
Mike
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Qemu-devel] Targetting a specific processor type
2005-07-24 18:51 [Qemu-devel] Targetting a specific processor type Mike Swanson
@ 2005-07-24 19:23 ` Fabrice Bellard
0 siblings, 0 replies; 2+ messages in thread
From: Fabrice Bellard @ 2005-07-24 19:23 UTC (permalink / raw)
To: Mike Swanson, qemu-devel
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
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