HP LineJet Printers - PCL-II/LinePrinter Plus Technical Reference Manual, 171249-001PX

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Chapter 5 Configuring the Epson FX-1050 Emulation with Control Codes
Graphics, Quadruple Density
ASCII Code ESC Z n1 n2
Hex Code 1B 5A n1 n2
Dec Code 27 90 n1 n2
Purpose Selects Quadruple Density Bit Image graphics of 240 dpi
horizontally and 72 dpi vertically.
where (
n1 + 256 n2 ) defines the number of data bytes to follow.
DATA = ASCII characters for the dot pattern bytes.
n1 = (Number of DATA bytes) - 256( n2 )
(remainder of division of number of DATA bytes by 256,
sometimes referred to as MOD 256)
n2 = (Number of DATA bytes) / 256 (quotient of division)
Discussion This mode is similar to ESC L, except that four dot columns are
printed in the space normally taken by two columns. You can
change graphics density with the ESC ? command.
Example The following example produces quadruple density graphics of
the pattern used in the standard density example. The amount of
data must be quadrupled for quadruple density (the data are
used 108 times rather than 27).
Half Speed Mode, On/Off
ASCII Code ESC s n
Hex Code 1B 73 n
Dec Code 27 115 n
Purpose Reduces printer speed 50%
where
n = 1 or 49 (hex 00 or 30) turns half speed mode off
n = 0 or 48 (hex 01 or 31) turns half speed mode on
†Discussion This is simulated in your printer by unidirectional printing.
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
nonprintable characters are required.
“DATA” consist of 8-bit dot columns, with the MSB at the top,
and “1” bits producing dots. For more information, refer to
Chapter 6.