Texas Instruments Titanium TI-89 User Manual

Programming 631
Drawing a Point or Pixel
Drawing a Point or PixelDrawing a Point or Pixel
Drawing a Point or Pixel
Drawing Lines and Circles
Drawing Lines and CirclesDrawing Lines and Circles
Drawing Lines and Circles
Command Description
PtChg or
PxlChg
Toggles (inverts) a pixel at the specified coordinates.
PtChg, which uses point coordinates, affects the pixel
closest to the specified point. If the pixel is off, it is turned
on. If the pixel is on, it is turned off.
PtOff or
PxlOff
Turns off (erases) a pixel at the specified coordinates.
PtOff, which uses point coordinates, affects the pixel
closest to the specified point.
PtOn or
PxlOn
Turns on (displays) a pixel at the specified coordinates.
PtOn, which uses point coordinates, affects the pixel
closest to the specified point.
PtTest or
PxlTest
Returns true or false to indicate if the specified coordinate
is on or off, respectively.
PtText or
PxlText
Displays a character string at the specified coordinates.
Command Description
Circle or
PxlCrcl
Draws, erases, or inverts a circle with a specified center
and radius.
DrawSlp Draws a line with a specified slope through a specified
point.
Line or
PxlLine
Draws, erases, or inverts a line between two sets of
coordinates.

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)