Chapter 2: TI-83 Plus Specific Information 93
TI-83 Plus Developer Guide Third Release May 28, 2002
Link Port
Communications to and from the TI-83 Plus calculator is possible through the I/O port
using the unit-to-unit cable (included with the unit) or the graphic link cable (available as
an option).
Applications can use the link port for transferring data on two different levels.
• Using system routines that send/receive TI-83 Plus variables using the systems link
protocol. There are three system routines that are used:
AppGetCalc
Retrieves a variable from a TI-83 Plus or TI-83 calculator.
AppGetCbl
Retrieves a variable from a Calculator Based Laboratory (CBL)
or Calculator Based Ranger (CBR) device.
SendVarCmd
Sends a variable to a CBL or CBR device.
The AppGetCalc and AppGetCbl routines will automatically replace existing
variable data if the variable received does exist already.
No error handler is needed to be placed around calls to these routines. If any error
occurs, a flag is returned to indicate that the link operation failed. Nothing more
specific about the error is known.
See the System Routine Documentation for more details.
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