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For example, to print underlined italics at 12 CPI, assign n the value 193 (128 + 64 +
1).
Each time you send the ESC ! command, it sets or cancels the values for all nine of the
features it controls (the eight features listed in the table, plus 10 CPI). This means that
if you have requested 12 CPI underlined italics, and then want to add emphasized
printing to these features, you must add 8 (the value for emphasized print) to 193 and
send the command as: ESC ! 201. Just sending ESC ! 8 would turn off all the other
features as it turned on emphasized print.
Example
To see the range of print styles you can produce with ESC ! n, run the following short
BASIC program, which prints a sample of each possible combination. (Since the
program prints all 256 combinations, it will take a few minutes and about 12 pages for
the entire sample to print.)
10 FOR I = 0 TO 255
20 LPRINT:LPRINT
30 LPRINT CHR$(27);"!";CHR$(I);"ESC !";I;"selects this combination."
40 NEXT I
IBM
This command allows you to select print quality and character spacing for either
resident/font card or downloadable (DLL) fonts. Substitute a value for n from the table
on the next page.
3 – 12
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