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| From: | Fabrice Bellard |
| Subject: | Re: [Qemu-devel] Targetting a specific processor type |
| Date: | Sun, 24 Jul 2005 21:23:54 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20040913 |
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.
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