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Multiprocessor Configuration Switch Control

IP.com Disclosure Number: IPCOM000044158D
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05

Publishing Venue

IBM

Related People

Authors:
Schaber, MO Stranko, TA [+details]

Abstract

In a multiprocessor (MP) system assembled from uniprocessors or dyadic processors, it is necessary to establish a control point which determines the configuration to be established for automatic power-on. Usually this configuration is controlled at one place, such as a control panel, which may or may not have to be tested every time the system is initialized. The drawing shows logic for controlling MP mode from more than one source providing flexibility for the total reconfiguration of a processor system. A processor controller uses the output of a single switch to stipulate isolation or to allow the processor controller microcode to configure the system to multiprocessor mode under the control of a single service processor.