Re: A86: Re: LCD stuff
[Prev][Next][Index][Thread]
Re: A86: Re: LCD stuff
Excellent... it's all falling into place :)
When exactly does the OS set this checksum? Whenever you press [ON]?
I've noticed that sometimes that prevents the memory from being
erased...
Clem wrote:
> 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 ;-)
--
Aaron Curtis <acurti1@umbc.edu>
http://www.gl.umbc.edu/~acurti1
References: