Atari 800 - Page 263

Atari Printers 261
can appear as either control-H or CHR$(8). The number of
spaces can appear as a CHR$ function or as a print character or
control code. For example,
LPRINT
CHR$(8);CHR$(100)
would backspace by 100 dots.
If nn (number of dot spaces) is specified as a print character or
control code , that character code's ASCII decimal equivalent
will be used as the number of dots to be backspaced. This
number can be from 0 to 127 inclusive.
If d (with an ASCII decimal equivalent of 100) was substituted for
CHR$(100) in our previous example,
LPRINT CHR$(8);"d"
the result would still be backspacing of 100 dots.
In the standard character set, each character is considered to be
10 dot spaces wide. In the condensed character set, each
character is considered to be 9 dot spaces wide. Therefore, BS 10
would backspace one character in the standard character set,
and
BS 9 would backspace one character in the condensed
character set.
In the proportionally spaced character set, the number of dot
spaces per character varies from 6 to 18. The number of dot
spaces for the width of the 96 ASCII print characters is given in
Table 8-2.
The
dot spacing control characters as listed in Table 8-1 can be
used to add
or delete dot spaces between words and/or
characters. If dot spaces are added, the line will be extended. By
replacing the current number of dot spaces between words
and/
or characters with a lesser number, the line will be
condensed.
Dot spacing can be useful in printing characters in a bold
typeface.