Instructions
Press the "On" key in the lower left corner of the calculator.
Press the "PRGM" button in the middle of the third row to open the program editor. The screen will now show all programs or games currently installed on the TI-83.
Press the right arrow in the upper right corner twice to reach the "New" menu.
Press the "1" key or the Enter key to create a new program.
Use the keyboard letters to designate the name of your new game, then press "Enter."
Write the new game code on the blank screen. Press the "Enter" key to advance to the next line of code.
Quit the program editor when you are finished with the game code by pressing the yellow "2nd" button and then the "Mode" button.