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From: lkoop@pnet01.cts.com (Lamonte Koop)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Speed Upgrade
Message-ID: <7437@crash.cts.com>
Date: 6 Feb 91 08:16:02 GMT
Sender: root@crash.cts.com
Organization: People-Net [pnet01], El Cajon CA
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bartonr@eecs.cs.pdx.edu (bartonr) writes:
>In article <1991Feb3.222342.29920@bradley.bradley.edu> hitch@buhub.bradley.edu (Douglas Hanna) writes:
>> What I was wondering: is it possible to buy a faster 68K processor
>> (around 16MHz or so) and replacing the stock (~7MHz) processor
>
>  Yes, this should be a simple drop-in replacement.

Whoa!  Not quite so fast.  Sure, you can drop a 68000 rated at, say 12-16MHz 
into the CPU socket, but that will not speed anything up.  The chip will only
run as fast as the input clock, which you do state below (in a fashion).  I
belive what was originally wanted was an answer to speeding up the system in
such a fashion.

>
>> Is there a problem with this?
>
>  The 16 MHz 68000 may have a minimum required clock frequency of 8 MHz or so,
>meaning it may not operate reliably at the 7.16 MHz frequency you will be
>running it at.

Besides that, dropping in a 16MHz rated 68000 into the system is a waste of
money if you simply clock it at 7.15MHz (system clock norm).  As many here
have seen posts about, upping the speed of the 68000 through a faster clock
rate has been attempted in many forms with the "14MHz Hack"...such methods
have occasionally met with success...and many times not.


                             LaMonte Koop
 Internet: lkoop@pnet01.cts.com         ARPA: crash!pnet01!lkoop@nosc.mil
           UUCP: {hplabs!hp-sdd ucsd nosc}!crash!pnet01!lkoop
    When informed he exibited a reaction similar to pure Na with H2O.
                     Put simply, the man blew up.