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Article #39010

Re: SIMM's: more questions

#39010
From: Ace Swerling
Date: Thu, 09 Mar 1989 16:25
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In article <gY5TMty00WBVQ34II4@andrew.cmu.edu> wb1j+@andrew.cmu.edu (William M. Bumgarner) writes:
>What speed SIMM's will be required w/future versions of the OS?  If I buy
>SIMM's now, will they work in System 9.x on the IIhcx or IIcx?

From what I've read on the subject, chips faster than 100ns are very expensive
to produce because manufacturers can't get reliable, consistant results from a
large enough percentage of batches.  This isn't likely to change in the future.
So, Apple is writing some special code, of which I don't know the technical
details, so that the computers can run at faster speeds (33-50 MHz) without
excessive wait states for memory (more than 2).  Unfortunately, as I said, I
don't remember how they did it, but I would guess that 100 or 120ns chips should
do it for the next couple of years at least.

-Ace
I'm not employed by the University, so don't yell at them id I'm wrong.  Also,
I just remember reading this stuff, so don't yell at me too much.
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Message-ID: <41ec3568.10342@fir.engin.umich.edu>
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!caen.engin.umich.edu!swerling
References: <gY5TMty00WBVQ34II4@andrew.cmu.edu>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!caen.engin.umich.edu!swerling
From: swerling@caen.engin.umich.edu (Ace Swerling)
Newsgroups: comp.sys.mac
Subject: Re: SIMM's: more questions
Message-ID: <41ec3568.10342@fir.engin.umich.edu>
Date: 9 Mar 89 16:25:00 GMT
References: <gY5TMty00WBVQ34II4@andrew.cmu.edu>
Reply-To: swerling@caen.engin.umich.edu (Ace Swerling)
Organization: University of Michigan Engineering
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