Atari 400

80 User's Handbook to the Atari 400 / 800 Computers
In this example, E E represents pressing the Escape key twice, and
t represents pressing Escape Ctrl--.
The various escape sequences are given in Table 4-1.
Table 4-1. Escape Sequences
ASCII
Echoed
Keyboard Entry Code
Character
String Character
ESC/ESC 27
~
Escape Code
ESc/CTRL-- 28
II]
Cursor Up
ESC/CTRL-=
29 [!]
Cursor Down
ESC / CTRL-*
30
~
Cursor Right
ESC/CTRL-+
31
~
Cursor Left
ESC / CTRL-<
1 25
~
Clear Screen
ESC/SHIFT-<
1 25
~
Clear Screen
ESC/BACK S
126
~
Cursor left, replace with
blank space
ESC/TAB
127
~
Cursor right to ne xt
tab stop
ESc/SHIFT-BACK S
156
0
Delete Line
ESC/SHIFT-> 157
U
Insert Line
ESC/CTRL-TAB
158
C
Clear Tab Stop
ESC /S HIFT-TAB
159
=
Set Tab Stop
ESC/CTRL-2
253
13
Sound Built-in Speaker
ESC/CTRL-BACK S
254
D
Delete Character
ESC / CTRL-> 255
D
In se rt Character
Graphics Characters in Strings
The Atari has 29 graphic characters. These are output by using
the Control key in combination with a nother key. Table 4-2
contains a
list of the graphics characters.
The graphics characters can be includ ed in a string with a PRINT
statement to output graphics to the sc ree n. For example, the
following program,