Xref: utzoo comp.sys.mac.system:7361 comp.sys.mac.apps:6818 comp.sys.mac.misc:13129
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!apple!ntg!dplatt
From: dplatt@ntg.com (Dave Platt)
Newsgroups: comp.sys.mac.system,comp.sys.mac.apps,comp.sys.mac.misc
Subject: Re: Problem in Sys 7.0 with DiskTop 4.01
Message-ID: <1113@goblin.ntg.com>
Date: 13 Jun 91 18:36:51 GMT
References: <1991Jun8.061828.18230@serval.net.wsu.edu>
Followup-To: comp.sys.mac.system
Organization: New Technologies Group, Inc.  Palo Alto CA
Lines: 21

In article <1991Jun8.061828.18230@serval.net.wsu.edu> jeffp@yoda.eecs.wsu.edu (Jeff Parke - Vet med staff) writes:

>On System 7.0 Disktop bombs everytime with an illegal instruction with I try
>to unmount a floppy disk.  Unmounts of hard disk volumes work fine.
>
>Anyone seen this and/or know how to fix?

There is apparently a bug in the UnmountVol() trap code in System 7.  It
causes crashes when a desk accessory unmounts a floppy.  All other cases
work correctly, it seems.

I learned about this problem from Jeff Shulman, the author of
VirusDetective.  He's had to install code in the beta versions of
VirusDetective to keep it from unmounting floppies under System 7.  As
of the last I heard from him (last week) he has been unable to work
around the crash in any more elegant way... the trap simply will not
work properly.
-- 
Dave Platt                                                VOICE: (415) 813-8917
              Domain: dplatt@ntg.com      UUCP: ...apple!ntg!dplatt
 USNAIL: New Technologies Group Inc. 2468 Embarcardero Way, Palo Alto CA 94303