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2001/10/02
CHAPTER 7 IBM PROPRINTER - 19
• Images are printed at an approximate horizontal resolution of 120 dots per inch and at an approximate
vertical resolution of 72 dots per inch.
• Each byte represents a vertical column of eight dots, the most significant bit representing the dot at
the top. Simply set a bit to 1 if you want a dot to appear in that position, and to 0 if you want white
space to appear.
10 WIDTH "LPT1:", 255
20 LPRINT "***ESC L n1 n2 ***"CHR$(10);
30 FOR I=1 TO 5
40 '*DOUBLE-DENSITY BIT IMAGE MODE *
50 LPRINT CHR$(27);"L";CHR$(160);CHR$(0);
60 FOR J=1 TO 8
70 FOR K=1 TO 20
80 N=2^J-1
90 LPRINT CHR$(N);
100 NEXT K
110 NEXT J
120 LPRINT CHR$(10);
130 NEXT I:END
< Sample 16 >
Set double-speed, double-density image mode
EscYn
1
n
2
<image data> (27)(89)n1n2<image data> <1Bh><59h>n1n2<image
data>
• This command enables you to define and print a single line raster bit image on a single text line.
• n
1
and n
2
define the number of bytes that comprise the image.
• The image consists of 256*n
2
+n
1
bytes of data, each byte representing a single vertical column of
4/30".
• Images are printed left to right.
• Images are printed at an approximate horizontal resolution of 120 dots per inch and at an approximate
vertical resolution of 72 dots per inch.
• Each byte represents a vertical column of eight dots, the most significant bit representing the dot at
the top. Simply set a bit to 1 if you want a dot to appear in that position, and to 0 if you want white
space to appear.
• This printer always prints as fast as possible, hence this command is the exact equivalent of the Esc L
command.
10 WIDTH "LPT1:", 255
20 LPRINT "*** ESC Y n1 n2 ***", CHR$(10);
30 FOR I=1 TO 5
40 '*DOUBLE-SPEED & DOUBLE-DENSITY BIT IMAGE MODE *
50 LPRINT CHR$(27);"Y";CHR$(160);CHR$(0);
60 FOR J=1 TO 8
70 FOR k=1 TO 20
80 N=2^J-1
90 LPRINT CHR$(N);
100 NEXT K
110 NEXT J
120 LPRINT CHR$(10);
130 NEXT I:END
< Sample 17 >