Path: utzoo!mnetor!uunet!husc6!bloom-beacon!athena.mit.edu!cthulhu
From: cthulhu@athena.mit.edu (Jim Reich)
Newsgroups: comp.sys.amiga
Subject: Re: Piggyback CPU boards
Message-ID: <2086@bloom-beacon.MIT.EDU>
Date: 21 Dec 87 16:13:00 GMT
References: <2118@crash.cts.com> <486@.UUCP>
Sender: daemon@bloom-beacon.MIT.EDU
Reply-To: cthulhu@athena.mit.edu (Jim Reich)
Organization: Masochistic Institute of Technology
Lines: 19
Keywords: 68010 68020 privileged instruction
Summary: Software workaround

In article <486@.UUCP> alex@.UUCP (Alex Laney) writes:
> Most games are written in assembler, (should be:-) so they
>probably break on the old status register access instruction which is
>privileged on the '010,'020, etc.

I know that most of the 68020 boards for the 1000 and 2000 fix the problem
with the privileged instructions, but if that's the problem, worry not (yet).
There is a hack.  Lurking out there somewhere in Netland and BBSland (but does
anyone out there remember where?) is a file describing a do-it-yourself 68010
upgrade.  It included a software "wedge," a small assembler program which
hunted down and intercepted the nasty instructions...  May not help with
copy protected programs, though...

					-- Jim
					   cthulhu@athena.mit.edu

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