Path: utzoo!mnetor!uunet!husc6!mit-eddie!uw-beaver!cornell!rochester!bbn!uwmcsd1!ig!agate!ucbvax!PHOBOS.CALTECH.EDU!tjp
From: tjp@PHOBOS.CALTECH.EDU (Tim Pearson)
Newsgroups: comp.os.vms
Subject: SMG$READ_KEYSTROKE
Message-ID: <880131135811.05k@Phobos.Caltech.Edu>
Date: 31 Jan 88 21:58:25 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 28

The SMG$READ_KEYSTROKE procedure (in VMS v4.4) does not recognise
control sequences generated by a VT200-series terminal set to "VT200
mode, 8-bit Controls"; it returns code 511 (unknown terminator) for
the arrow keys and keypad keys.  Does anyone know if this behavior is 
documented anywhere, or if 8-bit controls are (or will be) supported by 
a later version of VMS?

[The following trivial program demonstrates the problem; it just types 
the code returned by SMG$READ_KEYSTROKE for each key you type.]

	integer ier, id, key
	integer smg$create_virtual_keyboard
	integer smg$read_keystroke
	ier = smg$create_virtual_keyboard(id,'SYS$COMMAND')
	if (ier.ne.1) callexit(ier)
10	ier = smg$read_keystroke(id,key)
	if (ier.ne.1) callexit(ier)
	type *,key
	goto 10
	end

Tim Pearson, Astronomy Dept, Caltech, Pasadena, California 91125, USA
BITNET/EARN:               tjp@citphobo
SPAN/HEPNet/Caltech:       Phobos::TJP or 6020::TJP
Internet:                  TJP%Phobos@Hamlet.Caltech.Edu
Telephone:                 +1 818 356-4980

-------