Atari 800

260 User's Handbook to the Atari 400/ 800 Comp uters
Standard, Condensed, and Proportionally Spaced Character Sets
The default character set used on the Atari 825 is the standard
character set--where
10 characters per inch are output. By
sending the condensed character control code, the co ndensed
character set
will be active. In the condensed character set, 16.7
characters per inch are output. Th e character width is the
uniform for all characters within either the standard (10 dot
spaces per character) or the condensed (9 dot spaces per
character) character
set.
In the proportionally spaced character set, characters are
assigned different widths. For example, an I would be assigned a
more narrow width than a W. However, all digits are assigned
uniform widths. Digits will be printed at 12 .5 characters per inch.
Approximately 14 non-digit characters are output per inch in the
proportionally spaced character set.
Condensed and proportionally spaced characters can be mixed
in the same output line. However, characters printed with the
standard character set cannot be mixed on the same line
with
condensed or proportionally spaced characters.
The
maximum line length on the Atari 825 printer is 8 inches.
Therefore, a
full line of standard characters would contain 80
characters. A full line of condensed characters would contain
132 cha racters.
The
ESC SO Code causes characters to be printed by the Atari 825
as extended or double width characters. The ESC SI code will end
extended character
printing. Extended character printing also
will end when a carriage return code is encountered .
If double wide characters are being output, 40 standard
character set
double wide characters would fill a line. 66
condensed double wide characters would fill a line.
Backspace & 1-6 Dot Spaces
The Backspace character code consists of the code BS followed
by the number of dot spaces (nn) to be backspaced. The BScode