Messages in this thread | | | Date | Mon, 07 Nov 2005 08:51:13 -0800 | From | Zachary Amsden <> | Subject | Re: 2.6.14: CR4 not needed to be inspected on the 486 anymore? |
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Maciej W. Rozycki wrote:
>On Mon, 7 Nov 2005, Zachary Amsden wrote: > > > >>While this is at least no worse in the nested fault case than earlier >>kernels, I really wish I had one of those weird 486s so I could test the >>faulting mechanism. It seems the trap handling code has gotten quite >> >> > > What's so weird about 486s? Besides, for testing it doesn't have to be >one -- you will get away with a 386, too. I have neither anymore, but >there are people around still using them. > >
Because I hold in my hand "i486 Microprocessor Programmer's Reference Manual, c 1990", and it has no mention whatsoever of CR4, and all documentation I had until Friday had either no mention of CR4, or something to the effect of "new on Pentium, the CR4 register ..." So I've had to re-adjust my definition of 486, which was weird.
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