4 programming, 1 introduction, 2 control commands – AMT Datasouth 41AY89AR777 User Manual
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4 PROGRAMMING
4.1 INTRODUCTION
This section describes printer graphics and the control codes and escape
sequences that are used to control the printer through the communications
interface.
4.2 CONTROL COMMANDS
Various features of the printer may be controlled using ASCII standard control
commands, (see Table 4.1). These features may be controlled through the user
program or the user may control these same features in real time from the
terminal. For example, to command a line feed in a BASIC program the user
would enter CHR$(10), where 10 is the decimal value for the ASCII character
LF (Line Feed). To command a line feed in real time from the terminal, the user
would enter CRTL J.
The characters shown in the control character column are what the user will see
printed when the printer is in display mode.
Table 4.1 Control Commands
Control
Code
Description
Control
Character
Decimal
Value
CTRLG
Beil
4
7
CRTLH
Back Space
%
8
CRTLI
Horizontal Tab
^1-
9
CRTLJ
Line Feed
V
10
CRTLK
Vertical Tab
V
T
11
CRTLL
Form Feed
1-
12
CRTLM
Carriage Return
'
k
13
CRTLN
Shift-out of normal print
to double wide
%
14
CRTLO
Shift-in to normal print
15
CRTLQ
X-on
'^1
17
CRTLS
X-off
IX
19
4-1