Connectivity 711
Stopping the Program
Because the
Chat program sets up an infinite loop on both devices, press ´ (on both
devices) to break the program. If you press N to acknowledge the error message, the
program stops on the Program I/O screen. Press ‡ or N to return to the Home
screen.
Upgrading the Operating System (OS)
You can upgrade the OS on your TI-89 Titanium using your computer. You can also
transfer the OS from one unit to another identical model (for example, from a TI-89
Titanium to a TI-89 Titanium or from a Voyage™ 200 to a Voyage™ 200).
Installing OS software resets all device memory to the original factory settings. This
means that all user-defined variables (in both RAM and the user data archive), functions,
programs, lists, and folders (except the Main folder) will be deleted. It is possible that
Flash applications could also be deleted. You should use TI Connect software to back up
your data to your computer before installing a new OS on your calculator.
See the important information concerning batteries before performing an OS upgrade.
Important Operating System Download Information
New batteries should be installed before beginning an OS download.
When in OS download mode, the Automatic Power Down™ (APD™) feature does not
function. If you leave your device in download mode for an extended time before you
actually start the downloading process, your batteries may become depleted. You will
then need to replace the depleted batteries with new batteries before downloading.
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