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From: 6600prao@ucsbuxa.ucsb.edu (Parik Rao)
Newsgroups: comp.sys.apple2
Subject: Re: Zip Chip GSX
Message-ID: <7446@hub.ucsb.edu>
Date: 28 Nov 90 07:47:50 GMT
References: <1990Nov28.055809.5037@magnus.ircc.ohio-state.edu>
Sender: news@hub.ucsb.edu
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 Upgrading the cache is simple (get some fast ram,
plug it into the empty slots.  Just like pluggin' in
RAM on a RAMcard).  People aren't having as much
luck upgrading the processor.  The board seems to be
maxing out at 10 mhz at the moment.  This may be due
to WDC's own inability to produce reliable 12mhz or
higher chip, I don't know.  I have a TWGS running at
9 mhz and I visited someone during TGiving w/ a 8
mhz Zip Chip GSX.  Whereas I obviously could not
compare the systems directly (she has a dma scsi, a
string of 60 meg HDs, and thats about it;whereas I
have a ramfast, cdc wren, and lots of other "speed
tricks") I found the systems to be equally fast, I
would suspect the TWGS is faster at 9 mhz but the
ZGSX would catch up with a 64k cache.
 
Next up, the author of SuperPatch (John Link I
believe?) owns a TWGS and a Zip Chip GSX and claims
the TWGS is faster!  Eeek.  Things get hairy now.
Bill Heineman (aka speeddemon) has spit the Zip Chip
GS cache into a code and data cache, each 64k.  ie,
the code bank (K) has its own 64k cache, and the
data cache (B) has its own 64k cache.  This would of
course speed things up quite a bit!  I don't
remember exactly what he sped the thing up to, I
believe its 10 mhz however.  Drew of CVTech
(RamFast) has a 10 mhz Zip Chip GSX also.
 
So basically it would appear the current generations
of Zip Chip GS's top out at 10 mhz.  What does this
mean?  If you do NOT own a accellerator, run - don't
use the Finder - to any mail order and place an
order for a Zip Chip GS.  It appears to be the
superior product.  If you already own a TWGS, hang
onto it.  The differences between the two appear to
be minute at best.  If you own a 9 mhz TWGS, you
probably have the faster product.  

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| Parik Rao, Univ. of California Santa Barbara... 6600prao@ucsbuxa.ucsb.edu  |
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