IBM 4400 Bit Image Mode, Quadruple Density

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Chapter 5Configuring the Proprinter III XL Emulation with Control Codes
Bit Image Mode, 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.
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 format with the appropriate decimal
valuesof the ASCII characters suppliedespecially in cases where the
dot patterns of nonprintable characters are required.
Comment For detailed information, see the Bit Image section in Chapter 8,
“Graphics.”
The printed density in this mode is 120 dpi horizontal and 72 dpi
vertical if selected when the Letter Gothic (DP) print mode is
active.
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).