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1992-08-25
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Telnet Enhancer version 1.0 (c) 1992 Mikael Wahlgren
Purpose
=======
The purpose of this program is to enhance the operation of the Telnet
daemon included with the IBM TCP/IP package for OS/2, in the following
ways:
* It speeds up remote operation of many applications, working in a
way that doesn't suit the Telnet daemon.
* It gives you access to many keystroke combinations, normally not
available with remote operation.
* It gives you access to DOS-boxes in OS/2 2.0.
* It gives you access to multiple OS/2 or DOS sessions via the
task switcher.
* It gives you a chat mode.
This version of the software is only briefly tested, and there are
still plenty of optimization to be done. But I have decided to
release an early version, because there certainly seems to be some
need for it. Any suggestions on how to improve the software are
welcome.
History
=======
The TN_ENH product is a side effect of another product from me, called
OS2You. OS2You is a package for remote control of an OS/2 machine via
asynchronous lines (Dial up modems or cable) or via Named Pipes in a
LAN.
The TN_ENH product is basically the exact same program as OS2You, but
excludes some files that are not needed for the operation of TN_ENH,
and instead includes some files necessary for TN_ENH to operate. The
TN_ENH package is also pre-configured to ease setup.
There is a more extensive documentation included with the OS2You package,
which you may find useful.
Installation
============
Copy the distributed files into a subdirectory that is PATHed and DPATHed.
If you get the package in a archived format (.ZIP or .ZOO) you should
extract the files first.
If you plan to use the DOS box access feature, you should add the line
"KBFILTER" to the AUTOEXEC.BAT file, or in any other way ensure that the
program KBFILTER.COM is loaded in the DOS-box when accessing it from
Telnet (it is possible to first access the DOS-box and load KBFILTER
manually, by entering the command via Telnet).
You start the Telnet Enhancer by issuing the command "TN_ENH". If
you add the option "-e" (TN_ENH -e), the ESC-key will NOT be a
command key, but rather emulate an ESC keypress. Instead you will
have to use the KEYPAD ENTER as your command key (see below about
the command key).
There are some parameters in the program that can be changed, by using
the SETUP program (PM-program). You should consult the documentation
included with the OS2YOU package, for more information about these
parameters.
Parameters you may find interesting to change in the SETUP program are:
You can alter the User configuration for "TN_ENH" to prevent task
switching capability.
The best performance is reported to be when accessing the Telnet daemon
with ANSI emulation.
You can fine tune the below parameters to improve screen update response.
"Screen update delay" - This parameter specified how often the remote
display will be updated. Between each screen
update, Os2You waits for some time, before it
updates the screen again. This delay is typically
set to 100 ms, but could be lowered to enhance the
response time, or higher to minimize the overhead
caused by Os2You.
"Cursor update delay" - When accessing sessions via the task switcher, the
cursor position updates must be done in a special
way, that cause screen flicker on the Os2You host
machine. This parameter specifies how often the
cursor position will be updated on the remote screen.
If set to 0 (zero) cursor position updates will be
disabled. This parameter does not affect cursor
updates for sessions started by Os2You.
"Execution priority" - This parameter specifies which priority the screen
update procedure should have. The higher the priority
the more power the program has to fulfill its task.
But if the priority is set too high, other programs
don't get any power to execute at all (including the
one you will execute remote). This parameter is
usually set to NORMAL/5.
Operation
=========
You start the program simply by entering the command "TN_ENH".
All keystrokes work as normal, except for the COMMAND KEY. Normally
the ESC key is assigned as the command key, but if you add the "-e"
option, you will have to use the KEYPAD ENTER instead, as this will
make the ESC key emulate a real ESC keypress. If you press the COMMAND
KEY once, and wait for 2 seconds, a help menu will appear,
with a choice of different commands and advanced keystrokes. If you know
which command to use directly, you can press the COMMAND KEY followed by the
command character directly, and you won't see the help menu.
To terminate the TN_ENH program, you type EXIT on the command line.
You will now return to the usual Telnet daemon.
It is possible to switch between different FULL SCREEN TEXT SESSSIONS
(DOS or OS/2). By pressing ESC followed by TAB, you will get a
Task List. However note that if you use the Task List to access another
session, you will prevent any other user on the machine (both users
in other Telnet sessions and users operating via the physical console).
You can prevent access to the Task List, by altering the user profile
for user "TN_ENH", changing the "Allow Task Switch" flag. You will
use the SETUP program for this.
Licensing
=========
This program is released as Shareware. If you find it useful or if you
use it on regular basis, you MUST register this software by paying
the registration fee.
If you register, you will receive a diskette with the newest version
available, and the latest beta version. You will also get a registration
file, that takes away the initial "delay" screen.
For more details on registration, see the included ORDER.DOC file.
Mikael Wahlgren
d9mikael@dtek.chalmers.se