Printronix P6000L, Руководство пользователя

Страница: 109 / 234

6-9 Programming
Bit Image Mode, Double Density Double Speed
P-SERIES SERIAL MATRIX
ASCII Code : N/A ESC Y
Hex Code : N/A 1B 59
Purpose : Prints graphics at twice the speed of Double Density (same speed as Single
Density) by ignoring adjacent dots.
Expression : CHR$(27);
”
Y
”
;CHR$(n1);CHR$(n2);
”
DATA
”
where : n1 + 256 n2 define the number of data bytes to follow.
DATA = ASCII characters for the dot pattern bytes.
NOTE: The DATA can be expressed in a CHR$(DATA) format with the appropriate
decimal values of the ASCII characters supplied especially in cases where the dot patĆ
terns of nonprintable characters are required.
Comment : For detailed information, refer to the Bit Image section in the Graphics chapĆ
ter.
Example : The following example produces Double Density Double Speed Bit Image
graphics of the pattern used in the Single Density Bit Image Mode example.
Note that the amount of data must be doubled for double density (the data is
used 80 times rather than 40).
NOTE: Depending on the host computer system, it may be necessary to include a width
statement within the BASIC program.