1-8 Operating the TI-80
The arrow keys near the upper right of the keyboard control the movement of
the cursor. In normal entry, a keystroke types over the character or characters
at the position of the cursor. The 4 and y / keys delete or insert
characters.
Key(s) Action(s)
9 or 6Moves the cursor within an expression. These keys repeat
when you hold them down.
7 or 8Moves the cursor between lines within an expression. These
keys repeat when you hold them down.
¦On the top line of an expression on the Home screen, 7
moves the cursor to the beginning of the expression.
¦On the bottom line of an expression on the Home screen,
8 moves the cursor to the end of the expression.
2 6Moves the cursor to the beginning of an expression.
2 9Moves the cursor to the end of an expression.
¸Evaluates an expression or executes an instruction.
M¦On a line with text on the Home screen, clears (blanks) the
current line.
¦On a blank line on the Home screen, clears everything on
the Home screen.
¦In an editor, clears (blanks) the expression or value where
the cursor is located; it does not store a zero.
4Deletes the character at the cursor. This key repeats.
y /Lets you insert characters at the underline cursor. To end
insertion, press y / or a cursor key.
yNext key press is a 2nd operation (the gold-colored label
printed to the left above a key). The cursor changes to . To
cancel 2nd, press y again.
?Next key press is an ALPHA character (the light gray
character to the right above a key). The cursor changes to A.
To cancel ALPHA, press ? or a cursor key.
y <Sets ALPHA-LOCK; each subsequent key press results in an
ALPHA character. The cursor changes to . To cancel
ALPHA-LOCK, press ?.
@Allows you to enter an X in FUNC mode or a T in PARAM
mode without pressing ? first.
The Edit Keys