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000082_slash_dev_slas…_2000@yahoo.com_Fri Apr 1 14:12:33 2005.msg
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Path: newsmaster.cc.columbia.edu!newsfeed.nyu.edu!router1.news.adelphia.net!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!postnews.google.com!z14g2000cwz.googlegroups.com!not-for-mail
From: "Mark Sapiro" <slash_dev_slash_null_2000@yahoo.com>
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Help: MS-Kermit 3.15 and VT320 emulation
Date: 31 Mar 2005 19:42:49 -0800
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Bev A. Kupf wrote:
> I hope this question is appropriate for this group.
It is. It probably would have been answered before now by someone more
knowledgeable than I, but it seems to have not reached the news server
at Columbia for some reason (at least it isn't in the archive there).
>A piece of
> equipment in the department I work in (Beckman scintillation
> counter) was connected to a VT320 terminal, which died. The
> connection was a serial connection - 19200 bps, 8 data bits,
> no parity, 1 stop bit.
>
> A new VT320 is beyond the budget of the group that owns the
> scintillation counter, so they asked me if I can hook it up
> to an old PC. I did that by loading DOS 5.0 on an old 386,
> and using MS-Kermit 3.15 as a terminal emulator. The kermit
> initialization file contains the following commands:
>
> set port com1
> set speed 19200
> set flow none
You might want 'set flow xon/xoff' here. it might make a difference.
> set carrier off
> set term type vt320
> connect
>
> I can communicate just fine with the instrument via Kermit, and
> the data it sends back does draw on the screen.
>
> However, before new data is displayed on the screen, the screen
> isn't "blanked", rather new stuff is written on top of old stuff.
What did the real vt320 do? Did it clear the screen or scroll the
screen. What does the Kermit emulation do? Does it restore the cursor
to the top left and then 'type' over the old data or does it just
overstrike on the bottom line or on the top line?
> What parameters can I alter in Kermit so that the screen is
> redrawn properly.
It may be something simple like 'set terminal cr-display crlf', or it
may be that Kermit isn't recognizing or is misinterperting the "host"
command to clear the screen and restore the cursor. It isn't too
likely, but it may be that the lack of flow control is causing part of
the sequence to get lost.
So, what is the expected behavior of the "vt320" and what command
sequences if any are sent by the scintillation counter to accomplish
this.
Note: With K-95, you can see control characters and escape sequences
with 'set terminal debug on', but this command doesn't work in some
versions including 2.1.3 (on works like off), so you have to use alt-D
to toggle the setting. I don't recall if there's a similar function in
MS-Kermit.
> Thanks so much!
> Beverly
>
> P.S. I had the same problem when I tried Kermit95 running on
> Windows 2000 PC.
> --
> Many a smale maketh a grate -- Geoffrey Chaucer
--
Mark Sapiro msapiro at value net The highway is for gamblers,
San Francisco Bay Area, California better use your sense - B. Dylan