
       			       Free software BY
			     Northern Telecom Inc.

     This  software  is  furnished for free and may be used and  copied as
     desired. This software or  any  other copies  thereof may be provided
     or  otherwise  made  available  to any other person.  No title to and
     ownership of  the  software  is  hereby transferred or allowed. 

     The information in this software is subject to change  without notice
     and should not be construed as a commitment by NORTHERN TELECOM INC.

     NORTHERN TELECOM assumes no responsibility for the use or reliability  
     of this software on any equipment whatsoever.

	Northern Telecom Inc.
	Network Support Systems Division
	54 Regional Drive
	Concord, New Hampshire 03301
	(603) 224-6511 X2529

	Program:	VTL
	Author:		Robin Miller
	Date:		Fall 1985


     Description:

	This program is used to list file(s) on a VT100 family  terminal.
     The  file(s)  are  displayed  one screen at a time for easy viewing.
     Various commands can be entered to change listing parameters  or  to
     position  to a particular portion of the file.  Many of the commands
     are the same as the Digital editor EDT.   Commands  can  be  entered
     either by using keys on the VT100 keypad, or by entering commands to
     the prompt at the bottom of the screen.  Some of the major  features
     of the program are outlined below:

       o  CTRL/C detection for aborting searches, etc.
       o  Delete the file being displayed.
       o  Display a ruler along the top of the file.
       o  Display the next file or next the directory.
       o  Display record numbers along the left margin.
       o  Display the file header of file being displayed.
       o  Print the file being displayed.
       o  Search (forward only) for a specified string.
       o  Shift the display window left or right.
       o  Split screen mode to display two files.
       o  Teco compatible see-all mode.
       o  Write portions of the file being displayed.

     The maximum record size that can be  displayed  is  512  characters.
     All  commands  have a repetition count of one.  Relative and indexed
     files are not supported.

     The  special  wildcard  characters "* and %" can be used with VTL on
     RSX-11M using FCS for I/O instead of RMS. Previously these were only
     valid  on VMS since a native image was being called to lookup files.
     The  Digital  files  ASCR50.MAC and PARSFN.MAC were modifed to allow
     this  type of wildcard lookup.  Unfortunatly, since they are Digital
     source  files I can't submit them to the SIG Tape.  I hope to submit
     an article on this to the RSX News Letter in the near future.  These
     modified  modules  are  in  the  object library (VTL.OLB) and can be
     extracted  an  used with other programs.  Refer to module VTLOPE for
     further information on using these (must save the file name block).

     [ File "VTL.DOC" contains full documentation for this program. ]

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     Fall 1985 DECUS Submission.

     This version of VTL has several bug fixes and will now sense the AVO
     setting of the terminal characteristics. Previously, either the /AVO
     qualifier had to be specified, or a taskbuild option changed to let
     VTL know the terminal was equiped with the Advanced Video Option.
