The following table describes the special function keys of the VT100 and shows the transmitted sequences. It also shows the key or key sequence required to produce this function on the IBM-PC keyboard.
The VT100 has four function keys PF1 - PF4, four arrow keys, and a numeric keypad with 0-9, ”.”, ”-”, RETURN and ”,”. The numeric keypad and the arrow keys may be in standard mode or applications mode as set by the host computer.
Sequences will be sent as follows:
To Get Press Key on VT100 Key Standard Applications IBM Keypad ===================================================== NUMLOK - On Keypad: 0 0 ESC O p 0 1 1 ESC O q 1 2 2 ESC O r 2 3 3 ESC O s 3 4 4 ESC O t 4 5 5 ESC O u 5 6 6 ESC O v 6 7 7 ESC O w 7 8 8 ESC O x 8 9 9 ESC O y 9 - - ESC O m - , , ESC O l * (on PrtSc key) . . ESC O n . Return Return ESC O M + NUMLOK - Off Arrows: Up ESC [ A ESC O A Up Down ESC [ B ESC O B Down Right ESC [ C ESC O C Right Left ESC [ D ESC O D Left Up ESC [ A ESC O A Alt 9 Down ESC [ B ESC O B Alt 0 Right ESC [ C ESC O C Alt - Left ESC [ D ESC O D Alt = Note that either set of keys may be used to send VT100 arrow keys. The Alt 9,0,-, and = do not require NumLok to be off. Functions: PF1 - Gold ESC O P ESC O P F1 PF2 - Help ESC O Q ESC O Q F2 PF3 - Next ESC O R ESC O R F3 PF4 - DelBrk ESC O S ESC O S F4 ESC ESC [ This will send the Escape Key
Please note that the backspace key transmits an ascii DEL (character 127) while in VT100 emulation. To get a true ascii backspace (character 8) you must press control-backspace.