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Method to Manage Multi-Processor Usage of Shared System Display Devices

IP.com Disclosure Number: IPCOM000039056D
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Krishnamurty, R Mothersole, TL [+details]

Abstract

A method is described to control availability of a single display device to multiple independent, asynchronous processors residing on a single workstation. With the installation of a Coprocessor Option onto a workstation, two independent, asynchronous processors are introduced into a single system environment. Since they run under unrelated operating systems, the problem is coordinating control to a common display device without interfering with each other's screen updates. An interprocessor communication system to coordinate asynchronous screen updates, while maintaining the integrity of both systems, is described. Applications running on the Primary Processor (PI) are assigned virtual terminals in the Virtual Resource Manager (VRM).