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: <1990Sep24.162347.24968@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>
Date: 24 Sep 90 20:23:47 GMT
Lines: 20

kudla@pawl.rpi.edu (Robert J. Kudla) writes:
...
>As a result, so far as I know, there's also no way to activate a
>disabled cartridge without using the hardware.  Such is life.... if
>you're writing code to take advantage of the cartridge, presumably the
>user would leave it enabled.  I've had programs that wouldn't work
>when my FC was plugged in and "totally invisible", as in even its
>freeze button wouldn't work, though, so maybe it's trashing a few
>bytes of the cartridge area or something....

As you've noticed, FC is never totally invisible.  Even when the software
disables itself, the ROM is still visible at $DE00-DFFF.  Most of the time,
this really doesn't make a difference, so your software won't be upset.  But
then, there's the occasional program that attempts to protect itself against
FC and other carts by writing to $DExx or $DFxx.  FC must be removed with
these programs.

Marcel A. LeBlanc  --  Electrical Eng. Computer Group, Univ. of Toronto
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