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From: rfischer@Neon.Stanford.EDU (Raymond C. Fischer)
Newsgroups: comp.sys.mac.hardware
Subject: Re: 16Mhz Mac Classic?
Message-ID: <1990Dec13.203818.16858@Neon.Stanford.EDU>
Date: 13 Dec 90 20:38:18 GMT
References: <1990Dec10.031031.24801@ux1.cso.uiuc.edu>
Organization: Computer Science Department, Stanford University
Lines: 18

In article <1990Dec10.031031.24801@ux1.cso.uiuc.edu> walk@mrcnext.cso.uiuc.edu (Todd Walk) writes:
>Does anyone know how tough it would be to make a Mac Classic run at 16Mhz
>with a 16Mhz 68000?  I know that this chip is used in the portable and 
>in several printers.  (Sounds like a good future Apple upgrade [expensive]
>deal to me.)

Very tough.  You'd be better off buying an accelerator.

In order to handle a 16MHz processor, you'd need to change the 68000
(to start), then the crystals that provide the clocking for the CPU,
then any support chips that won't run at the higher rate, then maybe
the memory chips, video circuitry, etc.  In short, you'd end up with
a new computer.  Since a Classic is basically just an SE on a smaller
PC board, you can see why Apple didn't make the Classic a 16MHz machine:
not having to redesign the system doubtless made it cheaper.

Ray Fischer
rfischer@cs.stanford.edu