On the TI-89 Titanium graphing calculator, keeping the device “awake” can be accomplished by writing a simple program that runs an infinite loop. Here’s how you can create such a program:
- Access the Program Editor: Turn on your TI-89 Titanium and press the
APPSbutton. Select the ‘Program Editor’ and then ‘New’.
- Name Your Program: When prompted, enter a name for your new program using the keypad and press
- Write the Program: Enter the following code to create an infinite loop:
While 1begins an infinite loop because the condition (1) always evaluates to true.
EndWhilemarks the end of the loop. The absence of any operation within the loop ensures the calculator does little to no processing, thereby keeping it awake without draining the battery excessively quickly.
- Save the Program: Press the
2NDbutton followed by the
ESC) to exit the editor and save your program.
- Run the Program: Press
APPS, go to ‘Var-Link’, find your program in the list, and press
ENTERto run it.
The TI-89 Titanium will now run the program indefinitely, preventing it from automatically shutting off. To stop the program and allow the calculator to turn off as normal, simply press the
ON button to interrupt the program.
Running a program like this continuously will consume more battery power than usual, so it’s a good idea to have the calculator plugged in if possible, or be prepared to replace the batteries more frequently. As with any device, allowing the automatic shutdown feature to function normally during periods of inactivity is generally the best practice for conserving battery life.