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         R E L E A S E   D E S C R I P T I O N

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Module id number: CSS/199
--------------------------

Module name:      FSE
-----------------------------------

Actual release:   02.01            Release date: 860813
-----------------------            --------------------

Previous release: 01.03            Release date: 850530
-----------------------            --------------------




New facilities:
---------------

  >> vs 02.01 <<

  The cursor movement keys are recognised for GT400, VT52, and ANSI
  X3.64 type terminals. These keys allow for cursor left, right, up,
  down and home movement.
  Function keys 1 to 4 are recognised for the above three terminal
  specifications. The function performed is fixed to the following:-

    PF1 - scroll display up (towards the beginning of file) by the
          current vertical scroll amount.
    PF2 - scroll display down (towards the end of file) by the current
          vertical scroll amount.
    PF3 - repeat the previous FIND command.
    PF4 - repeat the previous REPLACE command.

  The carriage return (CR) key is used to action a margin or regular
  command if entered while in the margin area or on the command line.
  The carriage return (CR) key is used to enter menu data while a
  menu is displayed.

  >> vs 01.03 <<

  Version 1.03 has been speeded up in the part, handling
  communication to the terminal.
  Now FSE supports GT400, VT100/ANSI and VT52 terminals,
  provided the LTU has been informed of the appropriate
  terminaltype.

  >> vs 01.01 <<

  Initial release


Changes:
--------

  >>  vs 02.01 <<

  The immediate command CTRL_S (display scroll command) has been changed
  to CTRL_C in order to resolve a conflict with XOFF flow control on
  the communications network.
  The immediate command CTRL_Q (quit line command) has been changed to
  CTRL_A Q in order to resolve a conflict with XON flow control on the
  communications network.
  The terminal I/O routines have been extensivly modified to improve
  the resopnse of the FSE terminal output and display refresh. See
  the comments section below for a furthur discussion of terminal
  input processing.

  Note: the reported, not corrected error in version 1.03 may be
  corrected by configuring the terminal for WRAP operation according
  to VT100 specifications.

Errors corrected:
-----------------

Reported errors, not corrected:
-------------------------------

860725 JHU

  This is not an error per se but is a problem in using the FSE on the
local area network at BALLERUP. The cursor left and cursor home cursor
keys transmit escape sequences which overlap with the network disconnect
and hold sequences. This causes a one input delay in cursor movement.
  The FSE produces the correct results, but the visual effect is
disturbing. This may be corrected in one of two manners. The LTU ports
could be operated in ANSI mode in order to change the transmitted
escape sequences, or the default disconnect and hold network sequences
could be changed.

CPECRs implemented in current release:  PR86383
--------------------------------------

Comments:
---------
860725 JHU

  The character input routines of the FSE are very slow. This is due
to the nature of the LTU driver transparent (raw) mode input processing,
which will only return one character at a time. Thus the full overhead
of an IOS call is required for every character input. The FSE input
routines are implemented to take advantage of multi-character input from
the LTU should this be made available.
  Future development of the FSE should concentrate on making more use
of terminal keyboard facilities (local terminal processing). To this
end, the LTU transparent mode should echo back input to the terminal
as is currently done for non-transparent mode, as well as forward data
to the host. This will relieve the FSE of the burden of echo back
processing, and reduce furthur the CPU and IOS load of the FSE. This
is impractical while the FSE uses specialised CTRL code sequences. «a5»
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