Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!samsung!cs.utexas.edu!oakhill!tomj
From: tomj@oakhill.UUCP (Tom Johnson)
Newsgroups: comp.sys.m68k
Subject: Re: Performance stats for MC68040?
Summary: MOVE16 is NOT supervisor only!
Message-ID: <2612@oakhill.UUCP>
Date: 13 Nov 89 17:08:39 GMT
References: <1989Nov5.222513.1572@sdsu.edu> <2890@jarthur.Claremont.EDU> <23948@cup.portal.com>
Reply-To: tomj@oakhill.UUCP (Tom Johnson)
Distribution: na
Organization: Motorola Inc., Austin, Texas
Lines: 23

In article <23948@cup.portal.com> mslater@cup.portal.com writes:
>>Can anyone clue me in to the differences between the MC68040 and the
>>MC68030?
>
>Moto has not yet formally introduced the 040, and has not given any performance
>data, other than to say it is more than 2x the 030 (and faster than the 486).
>
>There is only one new instruction, a memory-to-memory block move, that
>is a supervisor mode instruction.
      ^^^^^^^^^^
>
>Michael Slater, Microprocessor Report  mslater@cup.portal.com
>550 California Ave., Suite 320, Palo Alto, CA 94306  415/494-2677

Sorry Michael, but the information you have must be a little outdated...the
MOVE16 instruction is NOT a supervisor-only instruction, but rather, is
available regardless of the state of the S bit in the status register.  We
(Motorola) will be releasing more info on the 68040 soon.

Tom Johnson

Disclaimer:  These statements are my own, and don't necessarily reflect the
             position of my employer.