Texas Instruments Titanium TI-89 User Manual

Operating the Calculator 147
APD does not occur if a calculation or program is in progress, unless the program is
paused. If a program is running, but waiting for a key press, APD will occur after several
minutes of inactivity.
Setting the Display Contrast
Setting the Display ContrastSetting the Display Contrast
Setting the Display Contrast
The brightness and contrast of the display depend on room lighting, battery freshness,
viewing angle, and the adjustment of the display contrast. The contrast setting is
retained in memory when the graphing calculator is turned off.
Adjusting the Display Contrast
Adjusting the Display ContrastAdjusting the Display Contrast
Adjusting the Display Contrast
You can adjust the display contrast to suit your viewing angle and lighting conditions.
Contrast keys
If you press and hold 8 | or 8 « too long, the display may go completely black or
blank. To make finer adjustments, hold 8 and then tap | or «.
To: Press and hold both:
Decrease (lighten) the contrast
8 and |
Increase (darken) the contrast
8 and «
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Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)