InfoPrint LQ-1600K, Programmer'S Reference Manual

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44
Chapter 2
Configuring The LQ-1600K Emulation With Control Codes
Graphics, Double Density, Double Speed
ASCII Code ESC Y
n1 n2 d1 d2...dk
Hex Code 1B 59 n1 n2 d1 d2...dk
Dec Code 27 89 n1 n2 d1 d2...dk
Purpose Selects double density, double speed bit-image graphics of 120
dpi horizontally and 72 dpi vertically.
Expression CHR$(27);“Y”;CHR$(
n1
);CHR$(
n2
);“
DATA
”
Where:
n1 = 0 through 255
n2 = 0 through 31
n1 + (256 x n2 ) defines the number of data bytes to follow.
d1 d2...dk = ASCII characters for the dot pattern bytes.
NOTE: d1 d2...dk (DATA ) consists of 8-bit dot columns, with the MSB at the
top and “1” bits producing dots. (0 < = d < = 255)
Comment This mode prints double density with no adjacent dots. It is
similar to ESC L, except that if the graphics data contain
horizontally adjacent 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 is used 54 times rather than 27).