5.4. Graphics; Esc I; Graphics - Page 336

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.