Path: utzoo!utgpu!news-server.csri.toronto.edu!eecg.toronto.edu!leblanc
Newsgroups: comp.sys.cbm
From: leblanc@eecg.toronto.edu (Marcel LeBlanc)
Subject: Re: Super Snap Shot Cart Detection??
Message-ID: <1990Sep25.215914.5907@jarvis.csri.toronto.edu>
References: <418@news.nd.edu> <1990Sep15.171530.12692@xenitec.on.ca> <	<436@news.nd.edu>> <438@news.nd.edu> <+VJ%*-+@rpi.edu> <1990Sep24.162347.24968@jarvis.csri.toronto.edu> <449@news.nd.edu>
Date: 26 Sep 90 01:59:14 GMT
Lines: 20

treesh@darwin.helios.nd.edu writes:
...
>I have been able to write code that 'confuses' the snapshot cart even in 
>invisable mode.  What happens is that when you press the buttom, instead of 
>freezing the software, its crashes the computer.  This is kinda nice for a 
>cheep protections aginst SuperSnapShot, but doing a full computer reset
>recovers from the crash, with SuperSnapShot enabled, AND your ram is still
>intact, so it really did not acomplish much at all.

Check the version number of your Super Snapshot cartridge (type ">TV" in
BASIC).  The version you have (from 5.0 to 5.20) has a silly little bug that
would cause SS to lock up when interrupting a few programs.  This was
corrected as of V5.21 (V3 and V4 were fine!).  Subsequent versions (V5.22 is
the latest) should be able to interrupt ANY programs (there are still a few
times that it won't be able to resume from the interrupt, but if you are
careful, you won't have any problems).

Marcel A. LeBlanc  --  Electrical Eng. Computer Group, Univ. of Toronto
-----------------------------------------------------------------------
leblanc@eecg.toronto.edu		else: uunet!utcsri!eecg!leblanc