Browse Prior Art Database

Contention Display Stations for a Multi-Terminal System

IP.com Disclosure Number: IPCOM000041684D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Beneski, RT: AUTHOR [+4]

Abstract

This article describes a concept for more efficiently using a central processor shared by multiple display stations by classifying the display stations based on usage. Display stations are classified as either Reserved or Contention during system definition. Reserved display stations have a reserved operating slot with the central processor and are always available for use when powered on. Contention stations are not available for use when powered on but must request the right to operate from the central processor. If the maximum allowable display stations are not already active, a requesting contention station is allowed to function normally. If the maximum number of display stations are already active, the requesting station has to wait for active contention stations to sign-off from the central processor.

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Contention Display Stations for a Multi-Terminal System

This article describes a concept for more efficiently using a central processor shared by multiple display stations by classifying the display stations based on usage. Display stations are classified as either Reserved or Contention during system definition. Reserved display stations have a reserved operating slot with the central processor and are always available for use when powered on. Contention stations are not available for use when powered on but must request the right to operate from the central processor. If the maximum allowable display stations are not already active, a requesting contention station is allowed to function normally. If the maximum number of display stations are already active, the requesting station has to wait for active contention stations to sign-off from the central processor. The effectiveness of contention stations is greatly enhanced by having the central processor monitor the activity on contention display stations and automatically sign off those which are inactive. This allows other contention stations which may be waiting to become active sooner. Users determine which display stations are to be monitored and how long they are to be allowed to be inactive before they are timed out. Each individual station can have its own period of acceptable inactivity specified. When a display station is timed out, the operator who was signed on will be signed off and any documents or...