Path: utzoo!utgpu!watmath!att!drutx!druwy!dlm
From: dlm@druwy.ATT.COM (Dan Moore)
Newsgroups: comp.sys.atari.st
Subject: Re: Turboboost with GCR
Message-ID: <4399@druwy.ATT.COM>
Date: 19 Oct 89 14:51:33 GMT
References: <761@utacs.UTA.FI>
Organization: AT&T, Denver, CO
Lines: 20

in article <761@utacs.UTA.FI>, jackin@utacs.UTA.FI (Markku M{enp{{) says:
> Has anybody succeeded in using Spectre GCR with faster 
> processors (16Mhz) ? I would like to get my MEGA faster and
> especially would like to see Spectre GCR roaming in 16 Mhz.

	The Spectre GCR works with all of the currently available 16
Mhz processor upgrades.  Just don't expect it to run twice as fast,
most of the upgrades only offer about a 5% performance increase.  The
upgrades are really limited by the low performance of the memory in the
ST (low compared to a 16 Mhz CPU).  As far as I know only one of the
upgrades supplies a large performance boost since it has 32K of cache
memory, that allows the CPU to run at 16 Mhz with no wait states most
of the time.  With the cache the performance increase can be as large
as 100%, the average boost is about 50%.


				Dan Moore
				AT&T Bell Labs
				Denver
				dlm@druwy.ATT.COM