Tic Tac Toe v1.0b
By Don Barnes <x96barnes3@wmich.edu>
11/18/96

About
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   This program basically draws a grid on your calculator screen
and allows you to play tic tac toe without wasting any paper. I
choose this game as my first project because, as simple as it is,
it presented many challenges for a first time asm 
programmer like myself.  This program draws lines and circles, has 
a routine which returns interger square roots, and makes use 
of a 3x3 array.

Play
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   Once you arrive at the grid screen, you see the player number in 
the upper left hand corner.  Player 1 is X and player 2 is O.  Use 
the arrow keys to move the cursor and press enter to select a space.
Players alternate until someone gets 3 of their symbols in a row
or the board is full.  The program will not detect this!  You need to
push CLEAR for a new game.  ESC exits during your game.

Comment
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The program redraws the screen each time you press a button.
This is because I could not get the pixel_off or pixel_chg
routines to work correctly. Any help would be appreciated.

Notes
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   This program is a beta.  I am not responsible for any loss of data.
I recommend you backup your calculator before using this program.
   Tic Tac Toe is public domain.  You are welcome to use any code 
in the program.

My TI calculator and Fargo web page:
http://www.geocities.com/SiliconValley/Park/1809/