Texas Instruments TI-89 Developer's Guide

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Chapter 4: User Interface Overview
TI
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89 / TI
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92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
Attribute Background Foreground
A_NORMAL Unchanged ON
A_REPLACE OFF ON
A_REVERSE ON OFF
A_SHADED OFF Every other pixel on.
A_XOR Unchanged XOR’d with destination.
Table 4.1: Available Character Attributes
Reverse mode is usually used to denote highlighted or selected items, such as in
Figure 4.7.
Figure 4.7: Example Using the A_REVERSE Attribute
Shading is used to denote unselectable items. It is often used in menus, as
shown in Figure 4.8.
Figure 4.8: Example Using the A_SHADED Attribute

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA