Path: utzoo!attcan!uunet!tektronix!percival!parsely!agora!billsey
From: billsey@agora.UUCP (Bill Seymour)
Newsgroups: comp.sys.amiga
Subject: Re: CMI 68000 2x
Message-ID: <1176@agora.UUCP>
Date: 30 Sep 88 14:27:48 GMT
References: <wXCdIny00Vsf00YG0P@andrew.cmu.edu:
Distribution: na
Organization: Advanced Solutions, Hillsboro, OR
Lines: 48

From article <wXCdIny00Vsf00YG0P@andrew.cmu.edu:, by mp1u+@andrew.cmu.edu (Michael Portuesi):
:: *Excerpts from ext.nn.comp.sys.amiga: 31-Aug-88 Re: CMI 68000 2x William*
:: *Coldwell@perciva (3966)*
: 
::  The speed is pretty comparable to a 68020 with 16 bit memory, and with
::  all of the people who have flooded us with orders, Thanks!
: 
: 
: Could you post some benchmarks to validate this claim?  The CMI board sounds
: interesting, but I wouldn't consider buying it without having heard hard facts
: instead of objective opinions, especially from people who stand to benefit from
: its sale.
: 
	Needless to say, Bill is being a little optimistic here. In several
cases, the Processor Accelerator gives speedups in the range of 35% while
a 68020 board running at 14Mhz gives about 50%. I'm sure that's the type of
comparison he ment. My personal experience is that it almost all cases, the
68020 board (I've only tested the Hurricane) runs somewhere between our speed
and twice our speed. You get better results for the '020 if it's coupled
with an '881 and much better results if you have 32 bit memory. The point is
that the 68020 board runs around $800 while ours is only $200. This makes
the PA a viable option for people who want more speed without spending so
much money.
	PRetty much all the benchmarks I have are targeted more at showing
off math chips than by showing off processor speeds. Larry Gutkowski has
written some 68881 supports routines for use with the Absoft FORTRAN compiler
and I have results from these. (The benchmarks and results are posted in
seperate files on PLink for those who have access, or know someone who has
access, to PLink.) There is an article coming out in Amiga World RSN with
some benchmark times included. And I've seen some articles published in user
group newsletters where benchmark time have been included. Unfortunately I
don't have any of them here at home. I would be happy to run benchmarks for
people, but I had to send the Hurricane back, so I'll only be able to give
results for the PA, 68010 and standard machines...

:                                 --M
: 
: Michael Portuesi / Information Technology Center / Carnegie Mellon University
: ARPA/UUCP: mp1u+@andrew.cmu.edu                     BITNET: rainwalker@drycas
: 
: "my friends say she's a dumb blonde, but they don't know she dyes her hair"
			Bill

-- 
     -Bill Seymour             ...tektronix!reed!percival!agora!billsey
                               ...tektronix!sequent!blowpig!billsey
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