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From: prc@erbe.se (Robert Claeson)
Newsgroups: comp.mail.elm
Subject: Re: Arrow key bug in elm 2.2 PL14.
Message-ID: <1030@maxim.erbe.se>
Date: 30 Nov 89 11:57:10 GMT
References: <1271@kuling.UUCP> <1989Nov28.152904.8745@DSI.COM>
Organization: ERBE DATA AB, Jarfalla, Sweden
Lines: 20

In article <1989Nov28.152904.8745@DSI.COM>, syd@DSI.COM (Syd Weinstein) writes:

> >The command parsing in elm.c seems to presuppose that arrow key commands
> >always start with ESC (\033).  This is not true.  A vt220 in 8 bit mode
> >uses as the CSI (Command Seqeunce Introducer) the octal \233 to mean
> >the same thing as ESC[ in 7 bit mode.

> This one is not a bug, but a limitation.  Elm was never designed to
> handle arbitary cursor keys, only VT100 and HP.

VT220's are common enough these days that it would be worth adding support
for the 8-bit control characters as well. As for me, I use a VT220 in
Multinational mode but with 7-bit controls. Too many (American) applications
tend to strip the high-most data bit (what some people mistakenly believe
is the parity bit that is part of the interface and never should be passed
on to applications by the tty driver).

-- 
          Robert Claeson      E-mail: rclaeson@erbe.se
	  ERBE DATA AB