Chapter 6: DH Emulation  153

Graphics Commands

These commands are used to control the way graphics are entered or printed. They are listed in numerical order of their hexadecimal codes.

Graphics

Enters graphics printing mode which prints all available dots (uses all wires in the printhead). Any combination of dots may be printed in a graphics cell. Each graphics cell is eight dots wide by nine dots high, with nine bytes of data needed to define the cell (each byte defines the row of eight dots). The command must precede the nine bytes that define the cell. Graphics and text may be printed on the same line.

Do not use the command again to turn off this graphics mode as the printer will expect another set of bytes to define a new cell.

Hexadecimal

Decimal

ASCII

1E

30

RS

The following representation of the graphics cell shows how the cell is defined and which bits define which dots in the cell (bit 0 is the least significant bit; bit 7 is the most significant bit).

 

 

 

 

Bit Number

 

 

 

 

7

6

5

4

3

2

1

 

 

 

 

 

 

 

 

1st Byte

o

o

o

o

o

o

o

2nd Byte

o

o

o

o

o

o

o

3rd Byte

o

o

o

o

o

o

o

4th Byte

o

o

o

o

o

o

o

5th Byte

o

o

o

o

o

o

o

6th Byte

o

o

o

o

o

o

o

7th Byte

o

o

o

o

o

o

o

8th Byte

o

o

o

o

o

o

o

9th Byte

o

o

o

o

o

o

o

 

 

 

 

 

 

 

 

Each line may have up to 25 graphics cells (full-dot graphics). The print line is printed unidirectionally. Use six Vertical Tab commands (0B) or one Line Feed command (0A) between each line (8 lines/inch).

Graphics: 5 Dot

Enters or exits graphics printing mode which prints only the top five dots of the column (corresponding to the top five wires of the printhead). These top five dots correspond to the least significant five bits (bits 0-4) of the data sent to the printer as shown in the table.

Dots (Top to Bottom)

 

Bit

 

1st Dot (Top)

 

4

24

16

2nd Dot

 

3

23

8

3rd Dot

 

2

22

4

4th Dot

 

1

21

2

5th Dot (Bottom)

0

20

1

Hexadecimal

Decimal

 

ASCII

 

1B 1D

27 29

 

ESC GS

 

Use the following characters to define the graphics (least significant five bits):

Hexadecimal: 20-3F

Decimal: 32-63

ASCII: SP-?

Continued . . .

A776-PG00001 C 12/09

A776 (B780) Programming Guide

Page 164 Page 166
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Image 165
Cognitive Solutions A776, B780 manual Graphics Commands, Graphics 5 Dot, DH Emulation 153
Page 164 Page 166

B780, A776 specifications

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