Graphics, Double DensityDouble Speed
173
Graphics, Double Density Double Speed
ASCII Code ESC Y
n1 n2
Hex Code 1B 59
n1 n2
Dec Code 27 89
n1 n2
Purpose Selects double density, double speed bit-image g raphics of 120
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.
NOTE: The DATA can be expressed in a 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 8, “Graphics.”
Comment This mode prints double density with no adjacent dots. It is
similar to ESC L, except that if the graphics data contain
horizontallyadjacent dots, the data may print incorrectly. This
feature is widely used to move the print head precisely, by
printing blank dot columns.
Example The following example produces a double density, double speed
graphic image of the pattern used in the standard density
example. The amount of data must be doubled for double
density (the data are used 54 times rather than 27).