Browse Prior Art Database

Method and Implementation of Keystroking to Two Systems

IP.com Disclosure Number: IPCOM000116022D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Behrens, LE: AUTHOR [+4]

Abstract

Disclosed is a modification to an existing product, the Transition Data Link (TDL), that adds the capability of sending keystrokes from an attached workstation to two host computer systems simultaneously. A TDL is a device that attaches two 5250* twinaxial protocol hosts, such as AS/400*, Advanced/36*, or System/36* together primarily for the purpose of moving data between the two systems.

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This is the abbreviated version, containing approximately 85% of the total text.

Method and Implementation of Keystroking to Two Systems

      Disclosed is a modification to an existing product, the
Transition Data Link (TDL), that adds the capability of sending
keystrokes from an attached workstation to two host computer systems
simultaneously.  A TDL is a device that attaches two 5250* twinaxial
protocol hosts, such as AS/400*, Advanced/36*, or System/36* together
primarily for the purpose of moving data between the two systems.

      The concept was to enable an operator to easily enter data and
control two host systems at the same time from a single workstation.

      The implementation of the concept was to modify the TDL
microcode to add the required function.  Additionally a capability
was added so that the sending of keystrokes to both systems could be
turned on and off with a function key switch.  The switch capability
allows the operator to run the systems independently in order to do
error recovery on either of the attached systems or resynchronize the
functions if needed.

      The sending of keystrokes to both systems was accomplished with
the following modification to the TDL microcode:
  A Boolean variable was created to indicate which mode of
   operation (normal One-Way operation or special Two-Way operation)
   is in effect.
  The Boolean is set or reset when the operator presses the proper
   Program Function key on the proper screen.  When in Two-Way mode,
   characters (2W) are displayed on the scree...