Table A-3. Control Codes

Function

Symbol

Decimal

Description

 

 

Value

 

Backspace

BS

8

Move one column left unless at left margin, in

 

 

 

which case no action is taken.

Horizontal Tab

HT

9

Move to the next horizontal tab stop. The tab

 

 

 

stops are at the left margin, and every eight

 

 

 

columns to the right of the left margin.

Line Feed

LF

10

Move to the next print line while maintaining

 

 

 

current column position.

Form Feed

FF

12

Move to the first line at top of the next page while

 

 

 

maintaining current column position.

Carriage Return

CR

13

Move to the left margin on the current print line.

Shift Out

SO

14

Select characters that follow from the current

 

 

 

secondary font until receipt of a Shift In.

Shift In

SI

15

Select characters that follow from the current

 

 

 

primary font until receipt of a Shift Out.

Escape

EC

27

Indicates the beginning of a special control

 

 

 

sequence (escape sequence).

Space

SP

32

Move one column to the right unless already at

 

 

 

the right margin, in which case no action is taken.

 

 

 

 

Printer Commands A-23