Browse Prior Art Database

3270 Non-Programmable Workstation Common User Access Data Stream

IP.com Disclosure Number: IPCOM000099608D
Original Publication Date: 1990-Feb-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Arose, C: AUTHOR [+6]

Abstract

System Application Architecture (SAA) prescribes a set of rules for user interaction with a workstation. Standard keyboard actions by the user results in standard front-of-screen presentations that are common to all application programs. This is termed Common User Access (CUA). Two types of devices are provided for by SAA, Programmable Workstations (PWSs) and Non-Programmable Workstations (NWSs). With the latter class, a display control unit performs work on behalf of non-programmable devices.

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3270 Non-Programmable Workstation Common User Access Data Stream

       System Application Architecture (SAA) prescribes a set of
rules for user interaction with a workstation.  Standard keyboard
actions by the user results in standard front-of-screen presentations
that are common to all application programs.  This is termed Common
User Access (CUA).  Two types of devices are provided for by SAA,
Programmable Workstations (PWSs) and Non-Programmable Workstations
(NWSs).  With the latter class, a display control unit performs work
on behalf of non-programmable devices.

      A set of commands, orders and data from the host application
program to the NWS device is used to correctly present the desired
information on the display screen. Conversely, the user actions via
the keyboard must be conveyed to both the display screen and the host
application program.

      Fig. 1 is an overview of the interaction process between a CUA
device and the host application.  After creation of the CUA
partition, the host may send a CUA Picture Structured Field which
contains the CUA panel definition.  The host may then send a CUA
Control Structured Field to set the cursor position.  Once the user
has interacted with the panel and caused an inbound transmission, a
CUA Data Structured Field is used to send the necessary selections
and data back to the host.

      The following set of commands is used to control the process:
Begin/End Controls:           CUA C...