Expand description
C0 set of 7-bit control characters (from ANSI X3.4-1977).
Constantsยง
- ACK
- Acknowledge, usually sent by terminal in response to ETX
- BEL
- Bell, triggers the bell, buzzer, or beeper on the terminal
- BS
- Backspace, can be used to define overstruck characters
- CAN
- Cancel (makes VT100 abort current escape sequence if any)
- CR
- Carriage Return, move to first character of current line
- DC2
- Device Control 2, causes ASR-33 to activate paper-tape reader
- DC4
- Device Control 4, causes ASR-33 to deactivate paper-tape reader
- DEL
- Delete, should be ignored by terminal
- DLE
- Data Link Escape, interpret next control character specially
- EM
- End of Medium
- ENQ
- Enquiry, causes terminal to send ANSWER-BACK ID
- EOT
- End of Transmission
- ESC
- Prefix to an escape sequence
- ETB
- End of Transmission block
- ETX
- End of Text, causes some terminal to respond with ACK or NAK
- FF
- Form Feed, move to next form or page
- FS
- File Separator
- GS
- Group Separator
- HT
- Horizontal Tabulation, move to next predetermined position
- LF
- Linefeed, move to same position on next line (see also NL)
- NAK
- Negative Acknowledge, used sometimes with ETX and ACK
- NUL
- Null filler, terminal should ignore this character
- RS
- Record Separator (sent by VT132 in block-transfer mode)
- SI
- Shift In, switch to G0 (normal half of character set)
- SO
- Shift Out, switch to G1 (other half of character set)
- SOH
- Start of Header
- STX
- Start of Text, implied end of header
- SUB
- Substitute (VT100 uses this to display parity errors)
- SYN
- Synchronous Idle, used to maintain timing in Sync communication
- US
- Unit Separator
- VT
- Vertical Tabulation, move to next predetermined line
- XOFF
- (DC2) Terminal must pause and refrain from transmitting
- XON
- (DC1) Terminal is allowed to resume transmitting