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From: dltaylor@cns.SanDiego.NCR.COM (Dan Taylor)
Newsgroups: comp.sys.amiga.emulations
Subject: Re: : Transformer - IBeM for 68000s RSN !
Message-ID: <924@cns.SanDiego.NCR.COM>
Date: 29 Apr 91 22:50:34 GMT
References: <Yc6=yR600WB7MKL1tS@andrew.cmu.edu> <1991Apr29.103748.520@csc.canterbury.ac.nz> <15380@life.ai.mit.edu>
Organization: NCR Corp. SE-San Diego
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In <15380@life.ai.mit.edu> psteffn@pogo.gnu.ai.mit.edu (Paul Steffen) writes:


>Wouldn't it be possible to do some exception handling so that you could
>emulate the extra '20/'30 opcodes on a '00?

It's possible, but REALLY slow.  You HAVE to disable interrupts while you
do it, too.  This prevents register contents from changing while you
emulate supposedly "indivisible" opcodes.

Not, all in all, a thing you'd want to do, if you can get the '020, in
the first place.