Chapter 21: Memory And Variable Management - Texas Instruments TI-89 Manual Book

Chapter 21:
Memory and Variable Management
21
Note: Remember that
variables can contain
expressions, lists, functions,
programs, graph figures,
etc.
Note: You can also use
to transfer
VAR-LINK
variables between two
linked TI-89s, a TI-92, or a
TI-92 Plus. Refer to
Chapter 22.
Preview of Memory and Variable Management ................................. 350
Checking and Resetting Memory ......................................................... 353
Displaying the VAR-LINK Screen ......................................................... 355
Manipulating Variables and Folders with VAR-LINK ........................ 357
Pasting a Variable Name to an Application ........................................ 359
Archiving and Unarchiving a Variable................................................. 360
If a Garbage Collection Message Is Displayed ................................... 362
Memory Error When Accessing an Archived Variable...................... 364
This chapter describes how to manage variables stored in the
memory.
TI-89 / TI-92 Plus's
The screen
VAR-LINK
displays a list of defined
variables and folders. For
information about folders,
refer to Chapter 5.
You can also store variables in the
archive, a protected area of memory separate from RAM (random
access memory).
TI-89 /
TI-92 Plus
RAM
Archiving variables can be very useful (page 360). However, if
you do not need the benefits of the user data archive, you do not
need to use it.

Chapter 21: Memory and Variable Management

The screen
MEMORY
shows how the memory is
currently being used.
TI-89 / TI-92 Plus's
You can
archive and
User Data
Archive
unarchive
a variable.
user data
349