Atari 400 - Page 297

Appendix C. 295
Appendix C. Atari ASCII Code Set
In this appendix, the 256 characters in the standard character set
of graphics mode 0 are listed along with the Atari ASCII codes for
each character. The keystrokes used to produce the characters
are also listed
along with the associated standard ASCII character
(if any).
Remember , in graphics modes other than graphics
mode 0, an entirely different character may be output.
Some of the Atari ASCII codes produce control characters.
When control characters are output using a PRINT statement,
nothing is actually displayed on the screen. When control
characters are output with a PRI NT statement, a control process
of some kind will be executed or the cursor will be moved.
Control characters can be included in PRINT statements by
supplying
the CHR$ function with the Atari ASCII code of the
control character. Control characters can also be output by using
an escape sequence enclosed within quotation marks.
To
produce an escape sequence, first press the Escape key, and
then press the keys which will produce the desired control
character. For example, if the Escape key is pressed prior to
pressing the Control key and the = key, the Atari ASC code 29 for
cursor down is produced .
When an escape sequence is used with a control character, the
control process does not actually take place during keyboard
entry. However, the control character does appear on the
screen. When the PRINT statement containing the escape
sequence and control character is executed,the control process
will take place.
For example,
if the following statement was entered,
READY ,......---- ESC \ CTRL-+
PRINT "NNNl..A" pressed here