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I
<ESC>71
DISABLE PRINTING OF CODES
(decimal 128-159)
This command disables printing of all High-Order Control
Code equivalents of the Low-Order Control Codes (deci-
mal 7-15, 17-20, 24, and 27). All other control codes in
this range will print.
K.6
Mode Strings
If
you have user-defined all 256 available spaces in RAM
for special symbols, you may wish to easily access the
standard characters in ROM so that you can switch back
and forth. To do this, define each character set (ROM and
RAM) as a character string and use them in your program
to switch access.
L
Double-High, Double-Wide
Letters
Use two 9 x 11 matrices to define an extra wide character.
However, you should be careful to define the first half in
Proportional (Emphasized Mode) in order to take care of
the column with no printed dots. Seven-bit system users
should refer to "Core Characters" below.
The same technique with line spacing adjustments can
be used to define double-high or double-wide/double-high
characters. A little experimentation can produce some
very interesting results. The logical ASCII numbers to
use for defining an extra large letter would be the ASCII
equivalent of the Upper and Lowercase Roman and the
Upper and Lowercase Italic of that character (T and t and
T and t).
L.t
Core Characters
Defining large letters can very quickly use up all available
Appendix E
E-43
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