Path: utzoo!utgpu!watserv1!maytag!xenitec!zswamp!root
From: root@zswamp.fidonet.org (Geoffrey Welsh)
Newsgroups: comp.sys.cbm
Subject: Re: Super Snap Shot Cart Detection??
Message-ID: <1921.270374BB@zswamp.fidonet.org>
Date: Fri, 28 Sep 90 11:05:21 EDT
Organization: Izot's Swamp BBS - Kitchener, Ontario

 > From: treesh@darwin.helios.nd.edu
 > Message-ID: <449@news.nd.edu>
 >
 > I have heard rumors of really killer copy protection routines thaat use
 > the video chip as a sync rigistar.  If a program is Snapshotted and then
 > loaded, the video chip's timming will be off from the programs internal
 > time keeping routines, and thus the copy is detected.  I have never seen
 > code that could really pull this off, but I have heard about it being done.
 
   Snapshot is wonderful for taking pictures of running code. If, on the other 
hand, the code first sets up something critical to the operation of the rest 
of the program and then erases itself, the snapshot will not result in a 
working, free-standing copy. This doesn't mean you *can't* break it, only that 
it doesn't become trivial.
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