Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rutgers!njin!princeton!bombay!miyazaki
From: miyazaki@bombay.NoSubdomain.NoDomain (Takeshi Miyazaki)
Newsgroups: comp.sys.mac.programmer
Subject: Re: System 7.0/Supervisor Mode ?
Message-ID: <9470@idunno.Princeton.EDU>
Date: 12 May 91 20:21:45 GMT
References: <1991May10.175654.812@eng.umd.edu> <13455@goofy.Apple.COM> <9432@idunno.Princeton.EDU>
Sender: news@idunno.Princeton.EDU
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In article <9432@idunno.Princeton.EDU> bskendig@phoenix.Princeton.EDU (Brian 
Kendig) writes:

>Why do programs run in user mode under VM only?

I don't remember exactly, but I heard that 68000 (not 68020, 68030) has a
serious error in specfication (something like you can't access user data
from supervisor mode) so programmer must use only supervisor mode for
implementation.

Correct me if I am wrong.

Takeshi Miyazaki
miyazaki@ee.princeton.edu
Dept of E.E. computer engineering course.