Esc I; Graphics ; Set single-density image mode - Page 311

2001/10/02 

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.