Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utcs!wagner
From: wagner@utcs.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: VT100 V2.3 Possible Bug and Possible Fix
Message-ID: <1986Dec9.102147.14725@utcs.uucp>
Date: Tue, 9-Dec-86 10:21:47 EST
Article-I.D.: utcs.1986Dec9.102147.14725
Posted: Tue Dec  9 10:21:47 1986
Date-Received: Tue, 9-Dec-86 10:32:07 EST
References: <3711@vax4.tc.fluke.COM>
Reply-To: wagner@utcs.UUCP (Michael Wagner)
Organization: University of Toronto Computing Services, general purpose UNIX
Lines: 29
Keywords: Wecker VT100
Checksum: 31425


David Whitlock writes that the arrow keys don't seem to do the right things
in the VT100 program.  I reported something similar a while ago, as a bug
report.  I guess Dave Wecker didn't see it.  I got back a bunch of mail from
other people, and the net result is...

Dave's program is wrong.  However, it only shows for some programs.  Moreover,
it isn't clear what is right.

There are really two modes on a VT100.  There is keypad application mode, and
another one (whose name escapes me at present).  Keypad application mode is
the mode that makes the keypad on the right present different codes than
similarly marked keys in the body of the keyboard.  If your application runs
in keyboard application mode, Dave Wecker's VT100 incorrectly switches the
cursor key sequences.  The fix that Dave Whitlock gave will correct this
(if that's all your application does).  This makes the VT100 program capable
of talking to Series/1s running Yale/Ascii, for instance.

However, this other mode (whose name escaped) is supposed to effect the
cursor keys.  I suspect that IBM 7171s use this mode.  I hardcoded and
recompiled with both sequences, and neither would make the 7171 happy.
I wish someone would pull out a VT100 manual and set us all straight here.
It seems we're still confused.

Disclaimer:  I'm still running VT100 V2.2.  Dave Whitlock's comments make me
	     think that the problem is still not solved in 2.3.  Sorry to have
wasted everyone's time if the problem is indeed solved.

Michael Wagner (wagner@utcs)