Texas Instruments TI-99/4A User Reference Guide

General Information
FCTN - (LEFT)
Pressing the left-arrow key (backspace) moves
the cursor to the left. The cursor does not erase
or change the characters on the screen as it
passes over them
FCTN - (RIGHT)
Pressing the right-arrow key (forwardspace)
moves the cursor to the right. As the cursor
passes over the characters printed on the
screen, it does not alter them in any way.
FCTN t (UP)
FCTN l (DOWN)
These keys have variuus functiuns according to
the specific application where they are used.
See the TI BASIC section in this book and the
appropriate software manuals for a complete
explanation of their use.
FCTN 1 (DEL)
The D.Lete key is used to delete a letter.
number. or other character from the lines you
type,
FCTN 2 (INS)
The INSert key is used to insert a letter,
number. or other character into the lines you
type.
PCTN., (ERASE)
Pressing the ERASE key before pressing .NT.R
erases the line you are presently typing,
FCTN 4 (CLEAR)
This key is normally used to clear from the
screen any information you have typed (before
pressing ENTER). It also has additional functions
in
TI BASIC. See "Special Keys" in the BASIC
Reference Section of this book for details of its
use in TI BASIC.
Other keys have special functions in software
applications. Some of these are:
FCTN 5 (8I!GIN)
FCTN 8 (PROC'D)
FCTN 7 (A.ID)
FCTN 8 (REDO)
FCTN 9
(BACK)
1·6
SPECIAL CONTROL KEYS
The TI computer also has control characters
which are used primarily for
telecommunications.
For a list of the standard
ASCII control character3 included in your
computer. see "Control Key Codes" in the
Appendix. To enter a control character. hold
down the CTRL key and press the appropriate
letter or number key.
Keyboard Overlay
A two-level strip overlay is included with your
computer. You can use this overlay to help you
more easily identify certain keys that are used in
combination with the FCTN and CTRL keys.
The top level of functions, identified by the red
dot. are called control keys. To access these
keys. hold down the CTRL key. marked with a
red dot. while pressing the appropriate number
or alphabet key. The second level of functions,
identified by the light
gray dot. are accessed by
holding
down the FCTN key, also marked with a
light
gray dot. while pressmg the appropnate
number or Jetter key.
MATH OR OPERATION KEYS
The Math keys (or operation keys) are the keys
used to
instruct the computer to add. subtract,
multiply. diVIde, and raise a number to a power,
The symbols for addition, subtraction. and
~qll:ll~ :lr~ th~ 1l~1I:l1 on~~ you·rf'. familiar with.
but the multiplication and division symbols may
be new to you.
+ Addition
Subtraction
~~- Multiplication
I Divisiun
Equals
Thf'. "car~t" key ( 1\ ) is also IlSf'.d for
mathematical operations:
SHIFT t ...
This symbol tells the cornputcr to pcrfmm
exponentiation (raising a number to a power).
Since 5' cannot be easily printed on your
~C1 CClI, thc CUlIIlJutCI illlelVl cLS 5 f\ 3 to mean
that three is an exponent.
User's Reference Guide

Texas Instruments TI-99/4A Specifications

General

Brand	Texas Instruments
Model	TI-99/4A
Category	Desktop
Language	English