From: v094mzgh@ubvmsb.cc.buffalo.edu (Michael Schroder)
Newsgroups: comp.os.os2.misc
Subject: Re: TE/2 vt100 emulation problem
Date: 19 Nov 92 04:17:00 GMT
Organization: University at Buffalo
News-Software: VAX/VMS VNEWS 1.41

In article <1992Nov19.005657.6042@grebyn.com>, richk@grebyn.com (Richard Krehbiel) writes...
>In article <1992Nov17.214304.6169@grebyn.com> mfraioli@grebyn.com (Marc Fraioli) writes:
> 
>>   In article <1992Nov16.014807.1726@gmuvax2.gmu.edu> kbass@gmuvax2.gmu.edu (Ken Bass) writes:
>>   >In article <9309@blue.cis.pitt.edu.UUCP> djbpitt+@pitt.edu (David J Birnbaum) writes:
>>   >>Until last week, I was running Procomm's vt100 emulation under MSDOS
>>   >>across a 2400 baud modem. This week it's TE/2's vt100 emulation under
>>   >>OS/2 across a v.32bis modem. Everything works as advertised, except for
>>   >>a serious problem with screen redraws in vi. Can anyone help?
>>   >>
>>   >>The specifics are that parts of the screen are often (but not always)
>>   >>blacked out as I move across them (either with cursor movement or when
>>   >>entering text). The area affected seems to be from the left margin to a
>>   >
>>   >I have the same problem using Telix for DOS under OS/2. I am also using
>>   >Ultrix 4.1. I dont know what the answer is.
>>   >
>>   I see the same problem with TE/2 connecting to an Ultrix 3.0 machine.
>>   It also sometimes loses my linefeeds, so I wind up typing a line over
>>   the previous line.  However, as you say, if I hit CTRL-L, everything is
>>   there.
> 
>I traced this to an incorrect interpretation of the TAB character.
>TAB was being used by emacs (and vi) to optimize cursor motion.  A
>VT100 TAB only moves the cursor, but TE/2 incorrectly blanks the
>characters which the TAB moves across.  I was told that a later
>version of COMMPAK.DLL corrects this, but I fixed it by telling unix
>"stty tab3", which says "my terminal doesn't support hardware tabs and
>could they be expanded to spaces, please?"

I've been having similar problems with vi, but the screen goes haywire when
I'm going up and down the screen, not across.  Somehow TE/2 acts like it is
interpreting the "move cursor up" command like a return, so the top of the
screen stays fixed and the bottom goes down, leaving the cursor where it was.
Not as frequently, but similarly when typing in something the return at the 
end of the line causes the cursor to go down, but not move the text below it
down.  This seems to happen  when inserting text in the middle of the screen.
However, if I have VI wordwrap for me, it usually doesn't do that.

That's why I don't buy the tab thing.  Maybe I've got a different problem.  
Note that I just re-downloaded TE/2 from Hobbes a couple days ago and it still
does this.  The backspace in TE/2.INI is also set to non-destructive...
Finally, I'm only running this on a 2400 baud modem, no compression or anything.
I also have problems (as in can't) download stuff and launch anything big like
a WinOS/2 session without TE/2 saying File Transfer Failed, and when I go back
it's always frozen.  It'll take Alt- commands, but even after hangup and redial
won't transmit any text...

Any clues?
 ______===______              Michael Schroder                ______===______
(_______________)       v094mzgh@ubvms.cc.buffalo.edu        (_______________)
 (_)  _|_|_  (_)          schroder@acsu.buffalo.edu           (_)  _|_|_  (_)
  +--<_____>--+           "Simply put, OS/2 rules!"            +--<_____>--+
Newsgroups: comp.os.os2.misc,comp.sys.ibm.pc.hardware