Printronix P3000 Series - Manual (Page 98)

Programming 6–12
Bit Image Mode, Quadruple Density
ASCII Hex Decimal
P–Series N/A N/A N/A
Serial ESC Z 1B 5A 27 90
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 patterns of non-
printable characters are required.
Comment Quadruple Density printing may reduce print speed to half. For detailed informa-
tion, refer to the Bit Image section in the Graphics chapter.
The printed density in this mode is 120 dpi horizontal and 72 dpi vertical when se-
lected from the Data Processing print mode or 180 dpi horizontal and 96 dpi vertical
when selected from the Correspondence print mode.
Example The following example produces quadruple density graphics of the pattern used in
the Single Density Bit Image Mode example. Note that the amount of data must be
quadrupled for quadruple density (the data is used 108 times rather than 27).
NOTE: Depending on the host computer system, it may be necessary to include a width
statement within the BASIC program.