Subject: repeat/missing lines in index

From: [email-masked] (Brian Skowron)
Date: 8 Jan 1996 07:11:34 GMT

> I get repeat/missing lines in the Pine program. When I first open MAIL
> usually as I scroll up the index duplicate lines appear until I scroll
> down again--then the extras disappear. Also, in the index the top line of
> the first page is repeated as the top line of the second page.
> As I choose O OTHER COMMANDS the sets of commands are repeated at bottom
> of screen again...
>
> The Ctrl-L (REPAINT SCREEN) command has ne effect on this. Neither does
> reconfiguring my Practical Peripherals 14.4 MacClass modem. I have been
> asking my provider support about this for over a year now. We tried some
> UNIX commands at login that improved it somewhat but the basic problem
> remains.
>It is NOT a terminal emulation problem. I'm set to VT100....
 
> I use a Mac Centris 610 24/340 and ZTerm 0.9.
>
> Mr. Gray (Terry Gray <[email-masked]>) suggested the following:

"check the number of lines and columns on both ends
(Zterm and Unix).  If they are both 24x80, try setting the ZTerm terminal
window size to 25 or more rows."

I don't understand this.

Brian

---

From: Sven Guckes <[email-masked]>
Date: 8 Jan 1996 10:23:19 GMT

[email-masked] (Brian Skowron) writes:
>"check the number of lines and columns on both ends (Zterm and Unix).
>If they are both 24x80, try setting the ZTerm terminal window size to
>25 or more rows."
>I don't understand this.

Let me present you a model od terminals which hopefully explains this:

A terminal is a "window" which can only show characters in a grid
given by columns and lines.
The window used on your machine as displayed by your terminal program (T)
must "match" the window as given by the host you connect to (H).
If the number of lines and columns do not match then you will see garbish.

Example:  Assume that T uses lines=25 and columns=80, but H has been set to
lines=24 and columns=80.  When T receives another line to print in lines 25
it will overwrite line 25.  On H however there is no line 25, so it will
move to line 1 and overwrite that one.

There are lots more problems as terminals use different codes like "jump to
position" and "clear line" etc.

Therefore you must make sure that ther terminals "match".
To see which terminal is used on a UNIX machine use the command "stty"
(set teletype).

Welcome to the world of great ideas and incompatibilities!  :-)

Sven

---

From: Jim Esten <[email-masked]>
Date: Mon, 8 Jan 1996 08:05:53 -0600 (CST)

....you're looking at a known bug in the terminal emulation in Zterm .9.  
In your terminal setup, there is a dialog box which lets you set the 
lines.  It's been a while since I've seen a Mac of any flavor, but I 
recall that it defaults to 25 lines and you must reset it to 24.

....better yet, get a newer Zterm.  .9 went away more than a year ago!

   __| \ \  /   __|   _ \   _ \     Jim Esten [email-masked]
 \__ \  \  /  \__ \  (   |  __/  
\____/   _|  \____/ \___/  _|       "In the beginning was the word,
 _____________________________       and the word was ..... adjust"

    ....also at [email-masked]
    ....find me on the web at    http://www.stritch.edu/sysop/home.html