Browse Prior Art Database

Non-Bypass Protected Entry Field

IP.com Disclosure Number: IPCOM000102353D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 88K

Publishing Venue

IBM

Related People

Eagen, ST: AUTHOR [+2]

Abstract

In a computer system with work station controllers (WSCs) that control the attachment of non-programmable terminals (NPTs), the work station controller processes cursor movement keystrokes. Described is how a NPT data stream and the work station controller can be enhanced to provide efficient cursor movement between output items on a display panel. An entry field type is defined which allows a subset of field exit keystrokes (field advance and field backspace) to move the cursor to the entry field, even though the entry field is protected (i.e., keyboard data entry is prohibited).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Non-Bypass Protected Entry Field

       In a computer system with work station controllers (WSCs)
that control the attachment of non-programmable terminals (NPTs), the
work station controller processes cursor movement keystrokes.
Described is how a NPT data stream and the work station controller
can be enhanced to provide efficient cursor movement between output
items on a display panel.  An entry field type is defined which
allows a subset of field exit keystrokes (field advance and field
backspace) to move the cursor to the entry field, even though the
entry field is protected (i.e., keyboard data entry is prohibited).

      In a computer system with WSCs that control the attachment of
NPTs, the WSC processes cursor movement keystrokes.  The WSC supports
efficient cursor movement between input-capable entry fields with the
use of field exit keys.  However, a more efficient method of cursor
movement between output items is desirable.  Output areas may contain
cursor-sensitive items, for example, cursor-sensitive help and
selection field choices.  The only keys typically available for
cursor movement within output areas are the arrow keys (cursor up,
down, right, or left) which simply move the cursor one position at a
time.  This article describes how the NPT data stream and the WSC can
be enhanced to provide efficient cursor movement between output items
on a display panel.  An entry field type is defined which allows a
subset of field exit keystrokes (field advance and field backspace)
to move the cursor to the entry field, even though the entry field is
protected (i.e., keyboard data entry is prohibited).

      The figure illustrates the flow of display panel data between
an application program and a NPT.  The host display data manager
builds a physical data stream representation of a display panel and
passes it to the WSC for presentation. The WSC controls the physical
attachment of multiple NPT devices.  Each NPT consists of a keyboard
and display monitor and has limited processing capability.

      Entry fields are defined in the NPT data stream by...