Control Characters - IBM 3164 ASCII Manual

Control characters
The following section describes the function of the control characters.
Ctrl ASCII Control Character
+
Characters Meaning Displayed Description
Keys
2
NUL Null Ignored (see Enable/Disable
Write Null commands)
A SOH Start of Header
S
Ignored
H
B STX Start of Text S Enters transparent mode
X (DLE sequence)
C
ETX
End of Text E Exits transparent mode (D LE
X Sequence) or works as a line
turnaround (LTA)
D EOT End of E Works as an LTA or
Transmission T mandatory disconnect
(DLE Sequence)
E
ENQ Enquiry
E
Ignored
Q
F ACK Acknowledge A Acknowledges good LRC
K
G BEL Bell B Causes the audible alarm to sound
L
H BS Backspace B Causes the cursor to move left one
S
position
I HT Horizontal Tab H Causes the cursor to move to
T the next tab stop position
J LF Line Feed
L
Causes the cursor to move to the next
F lower line
K VT Vertical Tab
V
Causes the cursor to move to the
T
the lower line
L FF Form Feed F Causes the erase input function to
F be performed if SCROLL is off
and moves the cursor to the next
lower line if SCROLL is on
M CR Carriage Return
C
Causes the cursor to move to the
R
first character position of the current
line or the next lower line.
or works as L T A.
N SO Shift Out
S
Specifies the character set (U.S.
0 ASCII, special graphics, and
the alternate character)
0 SI Shift In
S
to be shifted in and out of the GO and
I
G1 spaces. In the data transmission of
G1, the characters will be sandwiched
between SO and SI.
5-11