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From: davet@oakhill.UUCP (Dave Trissel)
Newsgroups: net.micro.68k
Subject: Re: 68020 Performance, 68881 info from Dtack Grounded
Message-ID: <262@oakhill.UUCP>
Date: Mon, 10-Dec-84 05:17:40 EST
Article-I.D.: oakhill.262
Posted: Mon Dec 10 05:17:40 1984
Date-Received: Wed, 12-Dec-84 03:29:42 EST
References: 
Reply-To: davet@oakhill.UUCP (Dave Trissel)
Organization: Motorola Inc. Austin, Tx
Lines: 33
Summary: 

We have run several benchmarks now on an MC68020 plugged into an MC68010
socket.  This means the MC68020 was running at the very same clock speed
as the MC68010 (12.5 Mhz) and with the very same memory speeds (I think
it was a one wait state memory for the '010.)  The results have been
about the same on all benchmarks run so far -- almost exactly double the
speed (1/2 the time) and one-half the total number of bus cycles for
the '020. Remember also that the '020 was running on only a 16-bit bus.

Note that the benchmarks are the standard Pascal and C set with only
the EDN quicksort and Berkley Puzzle being of significant length.  This
implies that the MC68020 on-chip cache probably made up the bulk of
the improvement.  It would be interesting to run UNIX System V (or any
other OS for that matter) and see what results come up. (We are'nt
planning that but several of our customers already have.)

Concerning the MC68881, I believe samples are scheduled to go out this week.
Due to the dedication and heroic efforts of our '881 people it appears that
first silicon wafers are yeilding 95 to 98 percent bug-free parts.  Sounds
impossible, I admit, but soon you should have verification right here on
the net as customers check out the parts for themselves.  My understanding
is that many early parts are running at 16 Megahertz. (I wish somebody on
the '881 project would post here as they have a right to brag about thier
accomplishment.)

I am posting the MC68881 times in another message here for general use and
information. I would also request anyone having any information on the
Net (including Richard Mateosian of National) for equivalent transcendental
times for the National NS32081 to please post them to me.  We have not been
able to determine any transcendental times for that chip since it does not
have any on-board support for them.

Motorola Semiconductor                    Dave Trissel
Austin, Texas          {ctvax|gatech|seismo|ihnp4}|ut-sally|oakhill|davet