Date: Fri, 2 Jul 1999 23:42:48 +1200 From: "Dan Langille" <junkmale@xtra.co.nz> To: Tom Embt <tom@embt.com> Cc: freebsd-hardware@freebsd.org Subject: Re: dual CPU compatibility issues Message-ID: <19990702114513.RXJC112692.mta2-rme@wocker> In-Reply-To: <3.0.3.32.19990702002317.007170bc@mail.embt.com> References: <377c2652.750a.0@actrix.gen.nz>
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On 2 Jul 99, at 0:23, Tom Embt wrote:
> At 02:39 PM 7/2/99 nzst, you wrote:
> >I have an old DEC box which supports a dual processor setup. I've obtained a
> >Pentium 120 chip (the maximum speed supported by this box). I'm in the
> process
> >of tracking down another P120.
> >
> >How compatible does the second CPU have to be with the first? Is it enough
> >to be another Pentium 120? Do they have to be from the same batch or
> something?
>
> Not just any CPU will work!
>
> The CPU's should be the same stepping number, and preferably be type "SSS"
> CPUs (the last S is crucial). In the early-mid Pentium days, Intel had
> some difficulty manufacturing perfect chips, and thus sold some of the
> imperfect chips with certain restrictions on core voltage, timings, and
> (you got it!) SMP capability.
>
> Following a very productive (read: lucky) search on infoseek, it looks like
> you'll be wanting a SY033, SK110, or Q0776. If your board requires
> 82498/82493 or 82497/82492 compliant cache timings then the SK110 and Q0776
> may not work. The good news is that all SMP-capable 120's are of the same
> stepping number, and should interoperate (aside from the above mentioned
> cache limitation).
Ummmm, I may be out of luck. This is what's on the bottom of the chip:
A5451644AA
MALAY CS
BP80502120
SU033/VMU
>
> See the following links for more info:
I'll check those over the weekend. Thanks.
--
Dan Langille - DVL Software Limited
The FreeBSD Diary - http://www.FreeBSDDiary.org/freebsd/
NZ FreeBSD User Group - http://www.nzfug.nz.freebsd.org/
The Racing System - http://www.racingsystem.com/racingsystem.htm
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