Texas Instruments TI-99/4A - Page 26

Special Keys
FCTN 1 (DEL) - The Delete key is used to delete characters from
the program line- To delete characters, position the cursor (using
FCTN - or FCTN - ) over the character you wish to delete, then
press the Delete key. When yuu press the Delete key, the character
under the cur~~or is deleted and all characten; of the program line to
the right of the cursor are moved one position to the left. The
cursor does not move. A blank space is used to fill the position at
the right end of the program line left by the shifting of the chal-acters.
FCTN 4 (CLEAR) - The Clear or Break key has two functions,
depending on when you use it.
• When this key is pressed while a program is running, a
breakpoint will be taken at the next program line to be
executed.
This key allows you to temporarily stop a program
while it is running. Note that you must continue to hold the Break
key until the program stops running When you stop running a
program using the Break key, the message "BREAKPOINT AT
line-number" is displayed. The prog;ram line designated by the
line-number has not been performed. You can start the program
running again where you stopped by entering the CONTINU E
command .
• When the
Clear key is pressed while typing in a program line. the
line scrolls up on
the SCreen and is not entered. This key has
additional functions in Edit Mode and in N umber Mode.
FCYN 3 (ERASE) - The Erase key erases the entire program
line which you are typing. The line is 110t entered. This key
works differently in Edit Mode and N umber Mode.
SPACE BAR The Space Bar moves the cursor one positiun to the
right each time it is pressed_ If you move the cursor over a
character using the Space Bar, that character is replaced by the
space character.
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User's Reference Guide