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Path: utzoo!mnetor!seismo!cmcl2!philabs!micomvax!musocs!mcgill-vision!mouse
From: mouse@mcgill-vision.UUCP (der Mouse)
Newsgroups: net.periphs,net.micro,net.wanted
Subject: Re: update on **real** 19200 CRT
Message-ID: <464@mcgill-vision.UUCP>
Date: Sat, 26-Jul-86 17:29:36 EDT
Article-I.D.: mcgill-v.464
Posted: Sat Jul 26 17:29:36 1986
Date-Received: Mon, 28-Jul-86 05:03:57 EDT
References: <109@vixie.UUCP> <65@winfree.UUCP>
Organization: McGill University, Montreal
Lines: 53
Xref: mnetor net.periphs:479 net.micro:5690 net.wanted:3535

>> ...The unoffical tally shows the Wyse 50 in the lead, closely
>> followed by a Televideo 950.  The 950's keyboard removes it from
>> serious consideration,

     What's wrong with  the  950's  keyboard?   It's my second  favorite
keyboard (first is a Lisp Machine, not really comparable).

>> but I'm looking into the Wyse.

> Paul -- Stay away from the Wyse-50.  I bought about a half dozen at
> my former job, and loved them dearly (especially the keyboards!)
> until I started running Emacs on them... then I found out the hitch.
> The Wyse-50 emulates the Televideo and similar terminals, and eats a
> screen location every time it changes attribute modes on the screen.
> So, for example, an emacs mode line done in inverse video will get
> horribly trashed as time goes on... rewriting the screen with sort of
> fix it, but you LOSE a location on the screen (it shows up as a
> blank) every time you change from normal to inverse to whatever.

     This is not a problem with the terminal,  real TeleVideos (at least
the  older ones, like  the 950)  do that too.    This  is a problem with
Emacs, compunded by  the termcap entry you have.   I cannot speak  about
the 50, but I know that the 950, which works  the same way, had the same
problem here.   The  trouble is that  the Emacs  screen updater does not
recognize  the sg termcap capability, causing terminals with non-zero sg
to lose.    What  you need  is to use bright  for standout  rather  than
inverse  video  (bright  is the  only attribute  that doesn't take up  a
position).  Presumably whoever built the termcap entry  for the 950 paid
too much attention to the note in the documentation that says that "if a
terminal has multiple flavors of standout mode [...], the preferred mode
is  inverse video  by itself [...]".    For example,  the  tvi950  entry
shipped with 4.2 reads (in part)

	:se=\EG0:sg#1:so=\EG4:

which uses inverse video for standout,  and says  that changing takes  a
character  position.  This is  unusable, because too many programs don't
understand sg.  So we are running with

	:se=\E):so=\E(:

(and no sg).  This works fine.  I am typing this in Emacs on a 950, with
bright for the  modeline, and  everything is OK....   If anyone wants my
tvi950 termcap entry they are welcome to it---just send me mail.
-- 
					der Mouse

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