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Date:      Mon, 30 Aug 1999 14:44:23 +0100
From:      Michael Searle <searle@longacre.demon.co.uk>
To:        Michael Kenneth Henry <mhenry@black.ug.cs.usyd.edu.au>, freebsd-hardware@freebsd.org
Subject:   Re: AMD K6-2 350
Message-ID:  <19990830144423.01574@longacre.demon.co.uk>
In-Reply-To: <19990830102409.E8017152BB@hub.freebsd.org>; from Michael Kenneth Henry on Mon, Aug 30, 1999 at 08:22:32PM %2B1000
References:  <19990830102409.E8017152BB@hub.freebsd.org>

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On Mon, Aug 30, 1999 at 08:22:32PM +1000, Michael Kenneth Henry wrote:
> Hi all,
> 
> 	I just "upgraded" from a Cyrix M2 PR-233 to an AMD K6-2 350.
> 
> However, I'm just wondering if this was an upgrade or a downgrade: the
> Cyrix was a 6x86-class chip, whereas the AMD is a 5x86!
> 
> CPU: Cyrix 6x86MX (187.50-MHz 686-class CPU)
>   Origin = "CyrixInstead"  Id = 0x600  Stepping=0  DIR=0x0652
>   Features=0x80a135<FPU,DE,TSC,MSR,CX8,PGE,CMOV,MMX>
> 
> CPU: AMD-K6(tm) 3D processor (360.00-MHz 586-class CPU)
>   Origin = "AuthenticAMD"  Id = 0x58c  Stepping = 12
>   Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX>
>   AMD Features=0x80000800<SYSCALL,3DNow!>
> 
> Can anyone explain this to me?
> 

The K6-2 doesn't support all the features of a Pentium Pro, so code
for this processor won't always run on it. It doesn't affect the speed
(IIRC there was one fairly fast processor that detected as a 386!)

-- 
searle@longacre.demon.co.uk



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