VT100.net: Digital VT102 User Guide

Table 4-2 Control Codes Generated
Control Character	Mnemonic	Transmitted Code (Octal)	Key Pressed with CTRL	Dedicated Key
Null	NUL	000	Space Bar	-
Start of heading	SOH	001	A	-
Start of text	STX	002	B	-
End of text	ETX	003	C	-
End of transmission	EOT	004	D	-
Enquire	ENQ	005	E	-
Acknowledge	ACK	006	F	-
Bell	BEL	007	G	-
Back space	BS	010	H	BACK SPACE
Horizontal tabulation	HT	011	I	TAB
Linefeed	LF	012	J	LINE FEED
Vertical tabulation	VT	013	K	-
Form feed	FF	014	L	-
Carriage return	CR	015	M	RETURN*
Shift out	SO	016	N	-
Shift in	SI	017	O	-
Data link escape	DLE	020	P	-
Device control 1	DC1 (XON)	021	Q	-
Device control 2	DC2	022	R	-
Device control 3	DC3 (XOFF)	023	S	-
Device control 4	DC4	024	T	-
Negative acknowledge	NAK	025	U	-
Synchronous idle	SYN	026	V	-
End of transmission block	ETB	027	W	-
Cancel of previous word or character	CAN	030	X	-
End of medium	EM	031	Y	-
Substitute	SUB	032	Z	-
Escape	ESC	033	[	-
File separator	FS	034	\	-
Group separator	GS	035	]	-
Record separator	RS	036	~	-
Unit separator	US	037	?	-
Delete	DEL	177		DELETE
* The numeric keypad mode determines whether RETURN and ENTER generate the same control codes. The codes generated by RETURN are changed by two feature selections: The auto turnaround SET-UP feature when using half-duplex coded control (HDX B). The turnaround/disconnect SET-UP feature selected the turnaround character. If the turnaround character is carriage return (CR), the terminal transmits only one CR when you press RETURN. The line feed/new line feature. When this feature is on, RETURN generates two characters (CR, LF). When this feature is off, RETURN generates a CR.