Texas Instruments TI-89 Guide Book

Appendix A: Functions and Instructions 409
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 409 of 132
Name of the function or instruction.
Key or menu for entering the name.
You can also type the name.
Syntax line shows the order and the type of
arguments that you supply. Be sure to separate
multiple arguments with a comma (
,
).
Appendix A:
Functions and Instructions
Quick-Find Locator ................................................................................ 410
Alphabetical Listing of Operations ...................................................... 414
This appendix describes the syntax and the action of each
TI
-
89 / TI-92 Plus
function and
instruction.
Circle
CATALOG
Circle
x
,
y
,
r
[
,
drawMode
]
Draws a circle with its center at window
coordinates (
x
,
y
) and with a radius of
r
.
x
,
y
, and
r
must be real values.
If
drawMode
= 1, draws the circle (default).
If
drawMode
= 0, turns off the circle.
If
drawMode
= -1, inverts pixels along the
circle.
Note
: Regraphing erases all drawn items.
In a ZoomSqr viewing window:
ZoomSqr:Circle 1,2,3
¸
A
Arguments are shown in italics .
Arguments in [ ] brackets are
optional. Do not type the brackets.
Example
Explanation of the function or
instruction.

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA