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Date:      Sat, 16 Dec 1995 16:07:17 +1030 (CST)
From:      Michael Smith <msmith@atrad.adelaide.edu.au>
To:        gurney_j@efn.org
Cc:        d_burr@ix.netcom.com, alan@trickler.uu.silcom.com, questions@freebsd.org
Subject:   Re: Upgrade - CPU, clock?
Message-ID:  <199512160537.QAA29822@genesis.atrad.adelaide.edu.au>
In-Reply-To: <Pine.NEB.3.91.951214201815.7087P-100000@nike.efn.org> from "John-Mark Gurney" at Dec 14, 95 08:25:36 pm

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John-Mark Gurney stands accused of saying:
> right now I'm running a i486dx33 at 40mhz... and running 70ns ram at 0w/s 
> if I remeber right... I believe I had to turn of FAST page mode dram 
> though...  but I do have a question... I can get a Cyrix (yes I know.. 
> they suck) 80dx2...  could I run the chip at 80mhz (my motherboard 
> supports it) but not double it?  would there be problems with my IDE 

You don't understand.  You run a DX2/80 at 40MHz, and it doubles internally.

> vlbus controller? would my isa bus break?  from what I have heard about 

It would look like a DX/40 to your motherboard.  You would most likely
have to set the >33MHz VLB jumper, which would then run your VLB at 20MHz.

> the motherboard doing to slow down of the chip on doubled and tripled 
> chips that the cpu is actually rated at the fast mhz but I don't have the 
> technical background to know... thanks for the help...

This is garbled, but basically bogus.

> John-Mark

-- 
]] Mike Smith, Software Engineer        msmith@atrad.adelaide.edu.au    [[
]] Genesis Software                     genesis@atrad.adelaide.edu.au   [[
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