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Path: utzoo!mnetor!seismo!rutgers!ames!pioneer!lamaster
From: lamaster@pioneer.arpa (Hugh LaMaster)
Newsgroups: comp.sys.m68k
Subject: Re: move sr/move ccr: crock
Message-ID: <204@ames.UUCP>
Date: Fri, 23-Jan-87 12:08:20 EST
Article-I.D.: ames.204
Posted: Fri Jan 23 12:08:20 1987
Date-Received: Sat, 24-Jan-87 00:26:04 EST
References: <809@imagen.UUCP> <5158@mimsy.UUCP>
Sender: usenet@ames.UUCP
Reply-To: lamaster@ames-pioneer.arpa(Hugh LaMaster)
Organization: NASA Ames Research Center, Moffett Field, Calif.
Lines: 27
Keywords: virtualizable, virtual machine, hypervisor

In article <5158@mimsy.UUCP> mark@markshome.UUCP (mark weiser) writes:
>In article <809@imagen.UUCP> geof@imagen.UUCP (Geoffrey Cooper) writes:
>>In the 68010 and 68020 move from
>>SR is a privileged instruction.
>>This appears to be a crock.
>>My question is why the lords of 68000-land did this?  
>
>Actually, in my opinion, not doing it this way is a crock.  A similar
>instruction on the 80386 is NOT privileged, and that means the 80386
>cannot be fully virtualized, and that means that no one can be sure of

Is there a commercially available hypervisor for the 68010 and 68020?
I assume that Motorola has one for internal use, but I haven't heard
of anything available for user systems.  It is a great idea, though.




   Hugh LaMaster, m/s 233-9,   UUCP:  {seismo,hplabs}!nike!pioneer!lamaster 
   NASA Ames Research Center   ARPA:  lamaster@ames-pioneer.arpa
   Moffett Field, CA 94035     ARPA:  lamaster%pioneer@ames.arpa
   Phone:  (415)694-6117       ARPA:  lamaster@ames.arc.nasa.gov

"He understood the difference between results and excuses."

("Any opinions expressed herein are solely the responsibility of the
author and do not represent the opinions of NASA or the U.S. Government")