Re: [PATCH 1/10] Cr4 is valid on some 486s

[Maciej W. Rozycki]

On Fri, 11 Nov 2005, H. Peter Anvin wrote:

> I think the 486's that have CR4 are the same that have CPUID, and thus can be
> tested for by the presence of the ID flag.

 That's correct; for our purposes a 486 that would implement CR4 but not 
CPUID would not be interesting anyway, as we don't use CR4 elsewhere but 
for features discovered through CPUID.  And I don't think there's ever 
been an implementation that had CPUID but no CR4.

  Maciej
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