Printronix P9000 Series, User'S Reference Manual

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Programming 6-10
Bit Image Mode, Double Density
ASCII Hex Decimal
P-Series N/A N/A N/A
Serial ESC L 1B 4C 27 76
Purpose Selects Double Density Bit Image graphics.
Expression CHR$(27);
”
L
”
;CHR$(n1);CHR$(n2);
”
DATA
”
where n1 + 256 n2 define the number of data bytes to follow.
DATA = ASCII characters for the dot pattern bytes.
NOTE: The DATA can be expressed in a CHR$(DATA) format with the appropriate
decimal values of the ASCII characters supplied especially in cases where the dot patĆ
terns of nonprintable characters are required.
Comment Double Density printing may reduce print speed to half. For detailed inforĆ
mation, refer to the Bit Image section in the Graphics chapter.
Example The following example produces Double Density Bit Image graphics of the
pattern used in the Single Density Bit Image Mode example. Note that the
amount of data must be doubled for double density (the data is used 54 times
rather than 27).
NOTE: Depending on the host computer system, it may be necessary to include a width
statement within the BASIC program.