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

Bit Image Mode, Double Density (Normal Speed)
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Bit Image Mode, Double Density (Normal Speed)
ASCII Code ESC Y n1 n2
Hex Code 1B 59 n1 n2
Dec Code 27 89 n1 n2
Purpose Selects double density bit image graphics at single density
speed.
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 code prints specified data as bit image graphics at double
horizontal density, 120 dots per inch horizontally and 72 dots per
inch vertically. By ignoring adjacent dots, the print speed is not
reduced from the normal density speed. For more information,
see “Bit Image Graphics” on page 201.
Example The following example produces a Double Density Normal
Speed Bit Image graphics for the same pattern as in the Normal
(Single) Density example. Note that the amount of data must be
doubled for double density (the data is used 54 times rather than
27).