Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!ames!uhccux!waikato.ac.nz!atc
From: atc@waikato.ac.nz
Newsgroups: comp.sys.atari.st.tech
Subject: how about an upgrade to 68010
Message-ID: <1991Jan13.180628.2676@waikato.ac.nz>
Date: 13 Jan 91 05:06:28 GMT
References: <CWILLIAM.91Jan7113443@mimsy.umd.edu> <1991Jan7.232807.44220@vaxb.acs.unt.edu> <2509@sparko.gwu.edu>
Distribution: usa
Organization: University of Waikato, Hamilton, New Zealand
Lines: 42

In article <2509@sparko.gwu.edu>, kilian@seas.gwu.edu (Jens Kilian) writes:
> In Article 1068 of comp.sys.atari.st.tech, kenc@vaxb.acs.unt.edu writes:
> 
>> Chris,
>>   This is a no go, because of the way that the CPU and the MMU swap cycles. 
>> >From what I understand, the system clock ALREADY runs at 16 Mhz, but it gives
>> half to the 68000, and half to the MMU.  (I may have the wrong chip...it may be
>> the glue...)
>>   Anyway, since THAT chip, and all the support chips are not rated at anything
>> like 16 Mhz, and all the timing is sensitive, you try to double the speed of
>> the system clock, and you have an expensive paperweight.
>>   I think the speed up kits available use a caching technique, so that the new
>> chip DOES run at 16 Mhz, for it's cache, and 8Mhz for anything else.  That way,
>> you do get the speed improvement, and the system timing doesn't change.  Only
>> problem, is that that usually requires a caching chip, and another
>> daughterboard, making the cost more than $100.  
>>  
>>   If I'm wrong here, please jump in, I'd LOVE to be able to speed up my ST for
>> <$100....(grin)
> 
> The cheapest speed-up board I've seen was a project by the German magazine
> "c't" (one of the fall issues, but I can't check it now). It should be around
> $100 or cheaper, IF you're prepared to put it together yourself.
> As far as I remember, it only speeds up accesses to the ROMs and internal
> CPU operations, in RAM it runs at the normal speed (you can't speed up RAM
> accesses because the Shifter needs to access video RAM at fixed intervals).
> It has no cache, so it isn't as effective as the commercial boards, but it's
> CHEAP.
> 
> 				Jens Kilian
> --
Why not just take out the 68000 and put in a 68010, most software should run
and should run about 10% faster.
People do this to thier amigas,but they have a piece of pd software that gets
over some minor incompatability problems.
P.S. Its a very cheap upgrade too.
Not sure if this will work but it should

Andrew Chambers
Computer Consultant
University Of Waikato
New Zealand