Texas Instruments TITANIUM TI-89 - Manual (Page 728)

Connectivity 728
You can use optional parameters with the SendCalc or GetCalc command to specify
either the USB port or I/O port. (See Appendix A for details.) If you do not include these
parameters, the TI-89 Titanium communicates through the USB port.
The “Chat” Program The “Chat” Program The “Chat” Program The “Chat” Program
The following program uses GetCalc and SendCalc . The program sets up two loops that
let the linked devices take turns sending and receiving/displaying a variable named msg .
InputStr lets each user enter a message in the msg variable.