Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP 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