VT100.net: Digital VT102 User Guide

Table 5-2 Control Characters Recognized by VT102
Character | Mnemonic | Octal Code | Function
--- | --- | --- | ---
Null | NUL | 000 | Ignored when received (not stored in input buffer) and used as a fill character.
End of text | ETX | 003 | Can be selected as a half-duplex turnaround character.
End of transmission | EOT | 004 | Can be selected as a disconnect character or half-duplex turnaround character. When used as a turnaround character, the disconnect character is DLE-EOT.
Enquire | ENQ | 005 | Transmits answerback message.
Bell | BEL | 007 | Generates bell tone.
Backspace | BS | 010 | Moves cursor to the left one character position; if cursor is at left margin, no action occurs.
Horizontal tab | HT | 011 | Moves cursor to next tab stop, or to right margin if there are no more tab stops.
Linefeed | LF | 012 | Causes a linefeed or a new line operation. (See Linefeed/New Line). Also causes printing if auto print operation is selected.
Vertical tab | VT | 013 | Processed as LF.
Form feed | FF | 014 | Processed as LF. FF can also be selected as a half-duplex turnaround character.
Carriage return | CR | 015 | Moves cursor to left margin on current line. CR can also be selected as a half-duplex turnaround character.
Shift out | SO | 016 | Selects G1 character set designated by a select character set sequence.
Shift in | SI | 017 | Selects G0 character set designated by a select character set sequence.
Device control 1 | DC1 | 021 | Processed as XON. DC1 causes terminal to continue transmitting characters.
Device control 3 | DC3 | 023 | Processed as XOFF. DC3 causes terminal to stop transmitting all characters except XOFF and XON. DC3 can also be selected as a half-duplex turnaround character.
Cancel | CAN | 030 | If received during an escape or control sequence, cancels the sequence and displays substitution character ().
Substitute | SUB | 032 | Processed as CAN.
Escape | ESC | 033 | Processed as a sequence introducer.