Re: A86: Re: LCD stuff


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Re: A86: Re: LCD stuff




what's the difference between setting this to be the checksum, $a55a, and
$0000?

-josh

On Fri, 19 Nov 1999 18:54:41 +0300 "Clem" <darkclem@wanadoo.fr> writes:
>
>> As near as I can tell, if the cpu hits $0000, the calc's going to be 
>reset.
>> Somehow, when the lithium battery is in there, that doesn't happen.  
>But
>> why?
>
>I know !!! :)  I use a trick in the (upcoming) ZAC memory recovery 
>system...
>When the cpu hits $0000, the TI-OS will test a checksum to determine
>whether the calc has been turned off correctly, or crashed...
>This checksum is located at _onCheckSum, and it's the 16 bit sum of 
>the
>whole ram page 2... if you set this checksum correctly and your 
>program
>crashes, when you remove one battery, put it back in and turn the calc 
>on,
>it should work as if it was turned off correctly ;-)
>
>---
>Clem Vasseur <darkclem@wanadoo.fr>
>Icarus Productions <http://icarus.ticalc.org>
>
>
>

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