The TI-89 sported all of the power of a TI-92 Plus, but in a traditional handheld design. Along with the TI-92 Plus and Voyage 200 it was one of TI's most sophisticated calculators, with such features as 3D graphing, upgradable flash ROM, built-in assembly language programming, and a generous amount of user-available memory. The TI-89 Titanium has since replaced this model.

» TI Connect for the TI-89
» TI-Graph Link for the TI-89
» Guide Books from Texas Instruments
» TI-89 Manual
» Graphing Calculator Comparison
» TI Online Store

» TI Connect
The TI Connect is the latest link cable produced by TI. It has a higher data transfer rate than the TI-Graph Link cable. It's a USB cable and lets you transfer data files (such as programs) between your calculator and your computer.

» TI-Graph Link
The TI-Graph Link is the older link cable produced by TI. It does not have as high of data transfer rate, but it does work wih almost all calculators. It connects to your serial port and like TI Connect is widely used to transfer data files (such as programs) between your calculator and your computer.

From time to time, TI will update the internal code of their calculators to work around bugs, optimize functions, and even add features. This results in several versions of each calculator in the marketplace. You can check the ROM version of your TI-89 using the following key sequence and reading the number on your screen:

Known ROM versions:

• 1.00 (27 July 1998)
• 1.05 (2 June 1999)
• 2.03 (8 Decenmber 1999)
• 2.04
• 2.05
• 2.06
• 2.07
• 2.08
• 2.09 (27 March 2003)

» IR Link
The IR Link allows you to control infrared devices from your calculator or communicate with other calculators (to play games or chat) over a wireless connection.

» Link Cables
Link cables let you transfer data files (such as programs) between your calculator and your computer.

» Power Extension Page
The Power Extension instructions will show you how to use AA (instead of AAA) batteries without making any modifications to your calculator.

» TI-89 Turbo Page
These modifications to your TI-89 can overclock the calculator to 3-4 times its original speed.

BASIC programming on the TI-89 is compatible with that of the TI-92 and TI-92 Plus.

» Tutorials at TI-Freakware
» TI-Basic Developer

Assembly language programming capability is built into the TI-89. Assembly programs written for the TI-92 and TI-92 Plus must be modified to support the TI-89.

For software development, we recommend GCC4TI.

Several emulators are available to let you simulate TI calculators on your computer. To locate available emulators and learn how to download a ROM image from your calculator, see our Emulators page.