Fig. 2.10: Pen Display Mapping - Texas Instruments TI-83 Plus Manual

Chapter 2: TI-83 Plus Specific Information
Pen Display Mapping
This mapping is based on individual pixel locations. It is used mainly in the graph
context for displaying text on a graph, but is also used in the statistics edit context to
display list elements. The display is mapped out to 64 rows of 96 pixels.
0
1
2
.
.
.
62
63
Two bytes of RAM are used to position text written:
–
(penCol) = column coordinate (0 – 95d)
(penRow) = row coordinate (0 – 63d)
The pen location specified represents the upper left most pixel of the character
being displayed.
Fonts
–
5 (width) x 7 (height) (pixels) large characters.
6/7 pixel high by variable-width small characters.
Application defined custom characters.
Text formatting
–
Reverse video:
Display all text written in reverse video:
Write to Graph backup buffer:
The output can be directed to either the display, or the graph backup buffer,
plotSScreen
TI-83 Plus Developer Guide
0 1 2 3

Fig. 2.10: Pen Display Mapping

textInverse, (IY + textFlags); default = 0
.
textWrite, (IY + sGrFlags) = 1 to write to buffer; default = 0
penCol
...
4 5
90
...
...
...
.
.
.
...
...
91 92 93 94
Third Release May 28, 2002
73
95