Displaying Text; Fig. 2.9: Home Screen Display Mapping - Texas Instruments TI-83 Plus Manual

Chapter 2: TI-83 Plus Specific Information

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.
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:
Auto scroll:
If the bottom of the screen is reached:
TI-83 Plus Developer Guide

Fig. 2.9: Home Screen Display Mapping

textInverse, (IY + textFlags); default = 0
appAutoScroll, (IY + appFlags); default = 0
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Third Release May 28, 2002