The printer’s high- order control codes from 128 to 155 mirror their low-order counterparts (O-27). In some cases it is necessary or more convenient to use the high-order codes instead of the low-order ones. For example, if your system will not send a 9 for a horizontal tab, use 137 instead. For ready reference, both sets are listed here:

Low HighHighSymbol

Function

Dec

Dec

Hex

0

128

80

N U L

Terminates horizontal and vertical

 

 

 

 

tab setting ESCape sequence

7

135

87

BEL

Sounds beeper

8

136

88

BS

Backspace

9

137

89

H T

Horizontal tab

10

138

8A

LF

Line feed

11

139

8B

VT

Vertical tab

12

140

8C

FF

Form feed

13

141

8D

CR

Carriage return

14

142

8E

SO

Shift out; turns expanded mode

15

 

 

 

O N

143

8F

SI

Shift in; turns compressed mode

18

 

92

 

O N

146

DC2

Device control 2; turns compres-

 

 

 

 

sed mode OFF

20

148

93

DC4

Device control 4; turns expanded

 

 

 

 

mode set by ASCII 14 OFF

24

152

97

C A N

Cancels all text in print buffer

25

153

98

EM

Used with ESCape code to enable/

 

 

 

 

disable cut-sheet feeder

27

155

9B

ESC

ESCape code

Note: The high-order control codes cannot be used if the special graphics characters are activated.

B-11