Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!apple!apple.com!blob
From: blob@apple.com (Brian Bechtel)
Newsgroups: comp.sys.mac.programmer
Subject: Re: DDPWrite Problem found
Message-ID: <2673@internal.Apple.COM>
Date: 6 Jul 89 22:04:32 GMT
Sender: usenet@Apple.COM
Organization: Apple Computer, Inc.
Lines: 13
References:<5920@hubcap.clemson.edu> <7869@hoptoad.uucp> <14249@dartvax.Dartmouth.EDU>

In article <14249@dartvax.Dartmouth.EDU> earleh@eleazar.dartmouth.edu 
(Earle R. Horton) writes:
>      There is, however, a fairly simple test for Handle nihilism.  Run
> your code on a 68000 machine, stuff something odd in the longword at
> location zero, and wait for System Error 2.  If your code runs on more
> advanced processors only, put something there which will generate a
> Bus Error.  Technote 7 suggests the value 'NIL!' will work for both.

Mr. Bus Error, available on the Phil & Dave's Excellent CD, sets up a VBL 
task that repeatedly sets the long at location 0 to an odd value.  That 
way, even if you're trashing 0, when you jump to zero you'll catch it.

--Brian Bechtel     blob@apple.com     "My opinion, not Apple's"