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10/10/03
CHAPTER 7 IBM PROPRINTER - 18
• If bits 1 and 2 of n
4
are 01 the least significant bit of each data byte is replicated in rows 9 to 12 of the
grid.
• If bits 1 and 2 of n
4
are 10 the bits 1 to 4 of each data byte are replicated in rows 9 to 12 of the grid.
• Bits 5 to 7 of n
5
specify the number of columns left blank to the left of the defined character in
proportional spacing mode. Up to seven columns can be skipped.
• Bits 1 to 4 of n
5
specify the width in columns of the defined character in proportional spacing mode.
Up to fifteen columns can be used to define the character.
• Downloaded characters are selected using the Esc I command and then printed by sending the
appropriate character codes.
5.4. Graphics
Set single-density image mode
EscKn
1
n
2
<image data> (27)(75)n1n2<image data> <1Bh><4Bh>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 a horizontal resolution of 60 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 K n1 n2 ***";CHR$(10);
30 FOR i=1 TO 5
40 '* STANDARD DENSITY BIT IMAGE MODE *
50 LPRINT CHR$(27);"K";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 15 >
Set double-density image mode
EscLn
1
n
2
<image data> (27)(76)n1n2<image data> <1Bh><4Ch>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
1
+n
2
bytes of data, each byte representing a single vertical column of
4/30".
• Images are printed left to right.