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Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!hc!beta!unm-la!unmvax!charon!sdowdy
From: sdowdy@charon.unm.edu (Stephen Dowdy)
Newsgroups: comp.os.vms,comp.editors
Subject: Re: VT100 confused by TPU
Message-ID: <2109@charon.unm.edu>
Date: 23 Dec 87 06:08:58 GMT
References: <2080@charon.unm.edu> <3778@blia.BLI.COM>
Reply-To: sdowdy@charon.UUCP (Stephen Dowdy)
Distribution: na
Organization: University of New Mexico, Albuquerque, NM
Lines: 36
Keywords: VMS TPU vt100 firmware confusion

In article <3778@blia.BLI.COM> ted@blia.BLI.COM (Ted Marshall) writes:
>In article <2080@charon.unm.edu>, sdowdy@charon.unm.edu (Stephen Dowdy) writes:
>> the vt100 gets extremely confused about what its
>> scrolling region is and where to put the next line of text.  This
>> problem persists even upon exiting TPU.
>
>As I recall, there was a firmware bug in at least some VT-100's. I think it
>had to do with scrolling regions under soft-scroll. I remember that it could
>be pushed far enough that the terminal did a full reset.
>I don't know if this was fixed in later versions of the VT-100 family (I assume
>so) or what models/serial-numbers had the problem. However, I do remember that
>turning off soft-scroll mode fixed it. Try that.
>
>Ted Marshall       ...!ucbvax!mtxinu!blia!ted <or> mtxinu!blia!ted@Berkeley.EDU

Thanks for the info.
I originally had a header window of 1 line at the top, and a text display
window from line 2 to the second to last line, and a prompt/message area
at the bottom.  I removed the header window from the top line
of the screen, and let the main window go from line 1 to the second to last
line and put my header info in the status line.  I would rather have had
the header window there with the application title, but i needed this to
work on all terminals that would be used.  Oh Well.  Anyway, this setup
has remedied the problem.

Exactly what are you referring to when you say "soft-scroll"?  I'm not
aware of a distinction of soft or hard or no scroll for the vt100 series.

--stephen
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