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Article #6610Re: _Debugger trap failure
From: pri=8 Ephraim Vishniac x76659 ms...
Date: Mon, 28 Jul 1986 12:44
Date: Mon, 28 Jul 1986 12:44
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> I was just reading the MacsBug version 5.1 documentation that came > in Supplement Volume I, Issue 3 (the March/June 1986 supplement). I noticed > on one of the pages that they don't want anyone using Line-1111 traps anymore > to break into a debugger.... > Fine, I thought. I am always ready to follow the Apple Guidelines. I'll > just change this "dc.w $ff00" statement to the approved "_Debugger" trap. > Assemble; link. Run. > Boom. A bomb box (with a debugger installed!) ID=12. The old dsCoreErr. > Unimplemented trap. My debugger was virtually helpless. Reboot. > > You see, Apple doesn't really have an $a9ff (_debugger) trap. They fake > it in the debugger. I think it only works with the new 5.* series MacsBugs. I've been using _Debugger for about 1.5 years, since I started using MDS version 0.5. I have never had the problem described here. The Mac always obediently drops into Macsbug (even pre-historic versions) with an indication "USERBRK" in that cute, brain-damaged font it uses.
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!husc6!harvard!panda!genrad!decvax!wanginst!wang!ephraim From: ephraim@wang.UUCP (pri=8 Ephraim Vishniac x76659 ms1459) Newsgroups: net.micro.mac Subject: Re: _Debugger trap failure Message-ID: <846@wang.UUCP> Date: Mon, 28-Jul-86 08:44:09 EDT Article-I.D.: wang.846 Posted: Mon Jul 28 08:44:09 1986 Date-Received: Wed, 30-Jul-86 00:57:03 EDT References: <5401@ut-sally.UUCP> Organization: Wang Labs, Lowell MA Lines: 17