Path: utzoo!utgpu!attcan!uunet!lll-winken!lll-tis!ames!oliveb!amiga!boing!dale
From: dale@boing.UUCP (Dale Luck)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Is 14.32MHz too fast for my expansion RAM?
Message-ID: <349@boing.UUCP>
Date: 26 Aug 88 07:51:45 GMT
References: <3127@sdsu.UUCP> <4572@cbmvax.UUCP>
Reply-To: dale@boing.UUCP (Dale Luck)
Distribution: comp.sys.amiga.tech
Organization: Boing, Milpitas, Ca.
Lines: 29

In article <4572@cbmvax.UUCP> daveh@cbmvax.UUCP (Dave Haynie) writes:
>in article <3127@sdsu.UUCP>, larryr@sdsu.UUCP (Larry Riedel) says:
>
>> I am thinking about getting that 14MHz 68000 thing from CMI, but I am
>> wondering if the extra clock speed will be wasted.
>
>All of the Amiga speedup boards run the Expansion Bus memory at it's
>normal speed.  They do speed the system up, but they only run faster
>in the following cases:
>
>	- Internal CPU operation
>-- 
>Dave Haynie  "The 32 Bit Guy"     Commodore-Amiga  "The Crew That Never Rests"

Floating point routines will benefit from this. In terms of cpu cycles,
these routines have the highest fraction of cpu cycles/memory access.

In V1.3 ieee libraries this is even more apparent. The 68000 spends more
time in the Mul and Div routines relative to the rest of the code then
the older V1.2 code.

For example a 68010 running at same speed will improve Mul/Div by up to
5% from just having a little smarter Mul and Div microcode.


-- 
Dale Luck     Boing, Inc. {cbmvax|oliveb|pyramid}|!amiga!boing!dale
Although I do contract work for Amiga-LosGatos, my opinions probably
don't represent those of Commodore or its management or its engineers,
but I think the world would be a better place if they did.