Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!pasteur!ucbvax!VIOLET.BERKELEY.EDU!mwm
From: mwm@VIOLET.BERKELEY.EDU (Mike  Meyer, I'm in love with my car)
Newsgroups: comp.sys.m68k.pc
Subject: Re: How plug compatible is 68010?
Message-ID: <8807191848.AA12874@violet.berkeley.edu>
Date: 19 Jul 88 18:48:16 GMT
Sender: mwm@ucbvax.BERKELEY.EDU
Organization: The Internet
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Approved: info-68k@ucbvax.berkeley.edu

The two are very compatable. The only catch is that "MOVE SR,<ea>" is
a privileged instruction on the 68010, where it wasn't on the 68000.
Programs that use it on the 68010 will trap where they didn't before.

The solution is to insert a shim to catch those traps, do the move for
the user-mode program, and then return. Supposedly, there's a Moterola
app. note that describes this in detail, including code for that trap
handler. I've never seen it, but I may have a code listing somewhere.

I've done this. The speedup on my Amiga was between 4 and 5 percent. I
don't think it's worth the trouble for that. If you really want to
play VM games, then it's wortth the trouble.

	<mike