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Chapter 2: TI-83 Plus Specific Information 71

TI-83 Plus Developer Guide Third Release May 28, 2002

Displaying Text

The display is made up of 64 rows of 96 pixels. The TI-83 Plus has two sets of routines

that display text. The difference between the two sets of routines is how the text position

in the display is specified. The following are two distinct mappings of the display, home

screen and pen display.

• Home Screen Display Mapping

This mapping corresponds to the positioning of text that the home screen context

uses. The display is mapped out to eight rows of 16 characters.

Fig. 2.9: Home Screen Display Mapping

• Two bytes of RAM are used to position text written:

• (curRow) = row coordinate (0 – 7)

• (curCol) = column coordinate (0 – 15d)

• Font

• 5 (width) x 7 (height) (pixels) large characters

• Text formatting

• Reverse video:

Display all text written in reverse video:

textInverse, (IY + textFlags); default = 0

• Auto scroll:

If the bottom of the screen is reached:

appAutoScroll, (IY + appFlags); default = 0

Texas Instruments TI-83-Plus User Manual

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