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Path: utzoo!watmath!watnot!watrose!jafischer
From: jafischer@watrose.UUCP
Newsgroups: comp.sys.atari.st
Subject: Re: Mac Emulator (idea!)
Message-ID: <8362@watrose.UUCP>
Date: Wed, 14-Jan-87 12:01:58 EST
Article-I.D.: watrose.8362
Posted: Wed Jan 14 12:01:58 1987
Date-Received: Thu, 15-Jan-87 06:01:47 EST
References: <870@ark.cs.vu.nl> <37@marque.UUCP>
Reply-To: jafischer@watrose.UUCP (Jonathan Fischer)
Distribution: na
Organization: U. of Waterloo, Ontario
Lines: 22
Keywords: Preventing bus errors


In article <37@marque.UUCP> joeb@marque.UUCP (Joe Bronikowski) writes:
>In article <870@ark.cs.vu.nl> Patrick@ark.cs.vu.nl (Patrick van Kleef) writes:
>>
>>People tell me there is a way of preventing bus errors on the ST. This
>>type of error is generated by one line of the Glue chip, the so called
>>BERR line.
>>
>>Now what if we disconnected that line? In theory bus errors would be
>>impossible. Would it affect 'normal programs'? Will more Macintosh programs
>>run? Is there anyone who can figure this out?


The Mac has RAM in locations 0-8 that is unused by the OS (after booting),
and some Mac programs, you would think, must actually USE this RAM.  The ST
has ROM in that area (or is it just ROM in location 0?), so eliminating the
BERR would do no good.  The program would still not work.  It would be like
eliminating the sensation of pain.  You wouldn't feel that you have just
sawed off your right leg, but it would still be gone.
The above is based largely on hearsay and stuff from Magic Sac README files,
so I may be partly wrong.  Am I?
				-Jonathan Fischer