Date: Mon, 05 Aug 1996 21:20:01 -0700 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@HeadCandy.com> To: Khetan Gajjar <khetan@iafrica.com> Cc: A JOSEPH KOSHY <koshy@india.hp.com.HeadCandy.com>, freebsd-current@freebsd.org Subject: Re: Patch to recognize AMD 5x86 cpus Message-ID: <199608060420.VAA15503@MindBender.HeadCandy.com> In-Reply-To: Your message of Sat, 05 Aug 96 22:35:08 %2B0200. <Pine.BSI.3.95.960805223353.269P-100000@chain.iafrica.com>
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>On Mon, 5 Aug 1996, A JOSEPH KOSHY wrote:
>
>>Enclosed is a patch to recognize and print the kind of AMD 5x86 cpu
>>on-board at boot time. This is per AMD's application note on CPU
>>recognition.
>
>Is anyone working on Cyrix-patches/changes ?
>
>I know they won't compile with I586_CPU in the kernel, because they don't
>implement the full Pentium instruction set.
I assume you mean with *only* I586_CPU in the kernel.
And, it shouldn't (at least for the AMD), because the AMD 5x86 is in
reality just a souped-up 486.
I haven't looked closely enough at the Cyrix 5x86 to see if it has any
programmable enhancements above a 486. I know it's still for a 486
socket, and in spirit, it's more a 486 than a Pentium.
Furthermore, the Cyrix 6x86 is just a souped-up Pentium, in spite of
what their marketing department wants to call it. If there is only an
I686_CPU target in the kernel, I would expect that not to run on a
Cyrix 6x86.
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Michael L. VanLoon michaelv@HeadCandy.com
--< Free your mind and your machine -- NetBSD free un*x >--
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