Columbia Kermit/kermit.zip/newsgroups/misc.19961006-19970104/[e-mail] _Tue Dec 3 14:17:53 1996.msg

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From: [e-mail] (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Problems with 132 columns under Windows 3.1
Date: 3 Dec 1996 19:17:03 GMT
Organization: Columbia University
Lines: 171
Message-ID: <581ubf$9sv$[e-mail]>
References: <01bbe145$f49acf80$286ca4cd@jljones>
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In article <01bbe145$f49acf80$286ca4cd@jljones>,
John L. Jones <[e-mail]> wrote:
: We have a problem running Kermit 3.14 under Windows 3.x and being able to
: view 132 columns on a VMS box.  We can view 80 or 132 columns when Kermit
: runs on DOS, but when we get into Windows everything falls apart.
:
: Please let me know if anyone has any ideas on this.  The command that we
: enter under VMS to get the 132 columns is SET TERM/WIDTH=132 or SET
: TERM/WIDTH=80
:
Everything we know on this topic is written down in the file KERMIT.UPD
that is in your MS-DOS Kermit directory.  I reproduce it here for your
convenience:

(16) WIDE SCREENS AND HORIZONTAL SCROLLING

Kermit changes between 80 and 132 column mode at host request (CSI ? 3 h / l)
or when you give an explicit SET TERMINAL WIDTH { 80, 132 } command.  Until
version 3.13, 132-column screens were possible only on PCs with video adapters
that have a 132-column text mode.  Now MS-DOS Kermit also includes support for
DEC VT 132-column mode and Data General compressed text on EGA and VGA video
adapters that do not have a 132-column text mode, by entering graphics mode
and writing the characters dot by dot. 128 columns are displayed rather than
132 due to the PC's screen geometry but you can use MS-DOS Kermit's horizontal
scrolling feature to see the rightmost 4 columns.  Wide screens are handled
according to the following commands:

SET TERMINAL VIDEO-CHANGE {ENABLED, DISABLED, DOS-ONLY}
  Enable or disable the video screen from switching between 80 and 132
  columns.  By default, this is enabled in DOS only (DOS-ONLY).  Video-mode
  switching can wreak havoc on some (but not all) PCs when done in a Microsoft
  Windows window and so by default video-mode switching is disabled in
  Windows.  Use ENABLED to enable it AT YOUR OWN RISK.  If it works, Windows
  will probably force Kermit into a fullscreen session.  If it doesn't work,
  then disable it again and use horizontal scrolling instead, or run Kermit
  under plain DOS or in a fullscreen DOS window under Windows.  v3.14.

SET TERMINAL COMPRESSED-TEXT {GRAPHICS, TEXT}
  Tells whether Kermit should use text (fast) or graphics (slow) mode for
  compressed text (wide screens).  By default, it will use whichever method
  it thinks is appropriate to your video adapter.  Graphics is allowed
  on EGA, VGA or higher video systems.  v3.13.

Text mode will not actually display compressed text unless your video adapter
supports this function, but Kermit's virtual screen is adjusted to
the terminal-emulation width.  For example, if your screen shows 80 characters
per line, but your terminal width is 132, then wrapping occurs at column 132
(perhaps off the screen) rather than column 80, and Kermit reports its screen
width as 132 (e.g. in response to a report-request escape sequence).

Of course, for 132-column operation, it is always better if your video adapter
supports 132 columns directly -- the video board does all the work, which is
much faster than writing screen dots in software!  This works if Kermit knows
which kind of video adapter you have (Kermit determines this from a hopefully
unique "signature" in the video BIOS, provided it has not been hidden from
Kermit by Windows or your memory manager, see KERMIT.BWR).  Here is a list of
such boards:

  ATI EGA and VGA Wonder
  AST, Dell, and other boards based on Western Digital VGA boards
  AT&T / Olivetti
  Everex Viewpoint EV-659, FVGA-673, EV-678, Micro Enhancer Deluxe
  IBM SVGA (= Tseng ET4000, e.g. on PS/ValuePoint)
  IBM XGA
  Paradise AutoSwitch EGA Mono
  Paradise Professional
  Paradise VGA Plus 16 (ROM BIOS 003056-xxx firmware)
  Paradise VGA Plus (ROM BIOS 003056-xxx firmware)
  Paradise VGA Professional (ROM BIOS 003056-xxx firmware)
  Paradise VGA1024
  STB VGA/EM (Tseng TVGA)
  STB VGA/EM Plus (Tseng 4000), VGA/EM-16, VGA/EM-16 Plus
  Tseng Labs EVA board with 132-column kit installed
  Tseng Labs UltraPAK mono/Hercules with 132 column modes
  Tseng Labs ET4000 SVGA
  VESA-compatible video BIOS
  Video 7 Vega Deluxe with 132X25.COM driver installed and Video 7 VGA

If you have an adapter capable of 132-column operation, but Kermit does not
know how to activate it, set up your COLS132.BAT and COLS80.BAT files to do
the switching, as described in "Using MS-DOS Kermit".

For Data General DASHER terminal emulation, screen widths up to 207 are
supported for purposes of horizontal scrolling.  DG terminal emulation is in
text mode by default.  As soon as the host commands the terminal to display
compressed text, Kermit switches the entire screen to 132-column text mode if
your video adapter supports it, and otherwise switches to (slower) graphics
mode.  As in VT terminal emulation, this behavior is controlled by the SET
TERMINAL COMPRESSED-TEXT command.  Unlike VT terminals, DASHER terminals (and
MS-DOS Kermit, when in graphics mode) can display compressed and regular text
on the screen at the same time.

(16.1) WIDE SCREENS AND ROLLBACK

Normally, Kermit only keeps 80 columns in its screen-rollback memory.  If you
want to be able to roll back screens of 132 (or, for DG terminal emulation, up
to 207) columns, you must set the KERMIT environment variable WIDTH to 132 (or
the desired number) in your AUTOEXEC.BAT file, for example:

  SET KERMIT=WIDTH 132

The KERMIT environment variable must contain a WIDTH definition before you
start MS-DOS Kermit in order for it to take effect.  Wide rollback screens
need more memory than regular ones.

NOTE: The KERMIT=WIDTH value and SET TERMINAL WIDTH value are two different
things.     The former controls memory allocation in the rollback buffer, the
latter controls the actual display width (virtual or real) of your screen.

(16.2) HORIZONTAL SCROLLING

If your logical screen width is greater than the physical screen width, MS-DOS
Kermit 3.13 lets you scroll the screen horizontally by pushing keys.  The new
keyboard verbs are:

  \Klfpage    Scroll left one "page" (= 20 columns) (screen moves right)
  \Klfone     Scroll left one column
  \Krtpage    Scroll right one page (screen moves left)
  \Krtone     Scroll right one column

These verbs are unassigned by default. Here are the commands you could add to
your MSCUSTOM.INI file if you wanted to assign them to the gray (T-pad) arrow
keys on the extended (101) PC keyboard:

  SET KEY \2459 \Krtpage  ; Alt-Left arrow makes screen move left on page
  SET KEY \5491 \Krtone      ; Ctrl-Left arrow moves screen one column to left
  SET KEY \2461 \Klfpage  ; Alt-Right arrow makes screen move right one page
  SET KEY \5492 \Klfone      ; Ctrl-Right arrow moves screen one column right

When these keys are used in combination with the PageUp/Down keys, your screen
becomes a "virtual window" on your session, which you can move around in
arbitrary directions.

By analogy with SET TERMINAL ROLLBACK { ON, OFF }, which tells Kermit whether
to move a rolled-back screen automatically to the bottom when new characters
arrive from the host, the new command:

  SET TERMINAL HORIZONTAL-SCROLL { AUTOMATIC, MANUAL }

tells Kermit whether to scroll horizontally when a character arrives that
would be displayed to the left or right of the visible screen. By default,
horizontal scrolling is MANUAL during VT terminal emulation, and AUTOMATIC
during DASHER emulation.  MANUAL means you have to push keys to scroll the
screen horizontally, AUTOMATIC means that Kermit moves the screen to "catch"
incoming characters.

(End quote)  And from the KERMIT.BWR file:

(12.5) 132-COLUMN MODE

Normally, you can't use 132-column text mode in a Windows window, because
Windows takes over the graphics adapter and hides its particulars from Kermit,
but you can use it in a full screen session.  But if you want to try it in a
window anyway, tell Kermit to SET TERMINAL VIDEO-CHANGE ENABLE.  Then when a
directive is received to switch video modes, Windows might pop up a dialog box
saying that it won't let you do this in a Window session; click on OK and the
Kermit session will be switched to full-screen.

If you have a monitor with fixed horizontal frequency but a video adapter that
Kermit knows how to switch into 132 column mode, you will see only garbage on
your screen whenever Kermit switches to 132 columns.  Get a new monitor or
tell Kermit to SET TERMINAL VIDEO-CHANGE DISABLE.

On serial connections with Xon/Xoff flow control, Kermit sends Xoff and Xon
apply when commanded to change its screen size between 80 and 132 columns,
because this is often a time-consuming operation.  With RTS/CTS, Kermit turns
off RTS while the size is being changed.

See KERMIT.UPD for further information on 132-column mode.

(End quote)