Printronix P6000L, User'S Reference Manual

Page: 110 / 234

Programming 6-10
Bit Image Mode, Quadruple Density
P-SERIES SERIAL MATRIX
ASCII Code : N/A ESC Z
Hex Code : N/A 1B 5A
Purpose : Selects Quadruple Density Bit Image graphics.
Expression : CHR$(27);
”
Z
”
;CHR$(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 : In Quadruple Density, the data that follows n1 and n2 is paired, and the resulĆ
tant data is treated as in Bit Image mode, Double Density. The values of n1
and n2 must be properly defined as described in the Bit Image section of the
Graphics chapter. The maximum number of data per line is 3168 in the Data
Processing and High Speed print modes, and 4752 in the Correspondence
print mode.
The printed density in this mode is 120 dpi horizontal and 72 dpi vertical when
selected from the Data Processing print mode, 180 dpi horizontal and 96 dpi
vertical when selected from the Correspondence print mode, or 120 dpi horiĆ
zontal and 48 dpi vertical when selected from the High Speed print mode.
Example : The following example produces quadruple density graphics of the pattern
shown in the Bit Image section of the Graphics chapter. This is the same exĆ
ample as in the Single Density Bit Image Mode example, except the amount
of data must be quadrupled for quadruple density (the data is used 160 times
rather than 40).
NOTE: Depending on the host computer system, it may be necessary to include a width
statement within the BASIC program.