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On Line Graphic Representation of Detectable Failures

IP.com Disclosure Number: IPCOM000076842D
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Beard, JN: AUTHOR [+3]

Abstract

In systems in which groups or clusters of keyboards and display panels are under the control of a subsystem, or terminal control unit, it is desirable to be able to service the terminal equipment in an "on-line" environment. There can occur some types of keyboard errors or failures which will present invalid characters to the terminal control unit, but which are not to be represented on the displays by one of the normal graphic symbols utilized by the display. In order for the terminal control unit to provide for the analysis of intermittent and solid keyboard failures, the keyboard bit representation is placed upon the screen in a selected code form, for example, a representation in the hexadecimal system.

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On Line Graphic Representation of Detectable Failures

In systems in which groups or clusters of keyboards and display panels are under the control of a subsystem, or terminal control unit, it is desirable to be able to service the terminal equipment in an "on-line" environment. There can occur some types of keyboard errors or failures which will present invalid characters to the terminal control unit, but which are not to be represented on the displays by one of the normal graphic symbols utilized by the display. In order for the terminal control unit to provide for the analysis of intermittent and solid keyboard failures, the keyboard bit representation is placed upon the screen in a selected code form, for example, a representation in the hexadecimal system. Also, detectable failures in the terminal control unit can be indicated on one or more selected displays in suitable coded form.

Such character representation can be in operation continuously and does not interfere with normal display/operator communication. Accordingly, the capability of the operators to record or communicate the situation to maintenance and repair personnel is enhanced. This feature can be implemented either by suitable microprogramming within the terminal control unit, or by hardware in the terminal control unit.

The drawing shows a combined display and keyboard unit 3, in which a normal display of graphic symbols is shown at 5, while a special symbol such as shown at 7, will indicate, v...