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From: phil@amdcad.UUCP (Phil Ngai)
Newsgroups: net.micro.pc
Subject: Re: PC/AT fast xtal warning
Message-ID: <8531@amdcad.UUCP>
Date: Tue, 21-Jan-86 02:46:14 EST
Article-I.D.: amdcad.8531
Posted: Tue Jan 21 02:46:14 1986
Date-Received: Wed, 22-Jan-86 04:56:56 EST
References: <604@harvard.UUCP>
Reply-To: phil@amdcad.UUCP (Phil Ngai)
Organization: AMD, Sunnyvale, California
Lines: 31
Keywords: XENIX probs

In article <604@harvard.UUCP> dyer@harvard.UUCP (Steve Dyer) writes:
>I would like to point out a problem I discovered with using a faster
>crystal in my PC/AT when I installed SCO XENIX V.
>Dropping back to 12 mhz stopped the problem.

Does this mean a computer clocked faster than it was designed for
won't always work as designed? It must be an IBM conspiracy intended
to force people to buy faster and more expensive computers.

>glitches in the 6 mhz 286's on-chip memory management hardware.  I am thinking
>about installing a new 286 chip which is rated at 10 mhz (20 mhz xtal)
>and trying the experiment again.

There are other components in the PC/AT besides the crystal which
hobbyists seem to like to change so much and the 286. For example,
there's the RAM, the EPROM, the DMA controllers, the time of day
clock, and so on, all of whose timing was presumably carefully thought
out by the engineer to work even in worst case conditions. Now you
turn the clock up.

I wonder if I took my favorite program and removed some lines of code from
it, would it run faster? It should, it has less to do.

excuse the heavy sarcasm, I had to finally let it out...
-- 
 (C) 1986 Joe Random is not a valid copyright.
 Copyright 1986 Joe Random is.

 Phil Ngai +1 408 749 5720
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