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Maintenance Console to Monitor or Maintain more than one CPU

IP.com Disclosure Number: IPCOM000086509D
Original Publication Date: 1976-Sep-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Axelsen, EE: AUTHOR [+4]

Abstract

The space problem and the high costs involved when using one console per CPU in a multiprocessor (MP) environment can be eased by modifying the console to monitor or maintain both a basic CPU and an attached auxiliary processor (AU). Implementation requires a switching device which can switch the entire console from one CPU to another. This switching device can take the form of a toggle switch, called the select switch. The select switch is a two-position switch, one position being labeled CPU, the other AU. The select switch controls which processor is being displayed on the CRT or microfiche viewer. It also directs the signals from most of the maintenance pushbuttons to the selected processor.

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Maintenance Console to Monitor or Maintain more than one CPU

The space problem and the high costs involved when using one console per CPU in a multiprocessor (MP) environment can be eased by modifying the console to monitor or maintain both a basic CPU and an attached auxiliary processor (AU). Implementation requires a switching device which can switch the entire console from one CPU to another. This switching device can take the form of a toggle switch, called the select switch. The select switch is a two- position switch, one position being labeled CPU, the other AU. The select switch controls which processor is being displayed on the CRT or microfiche viewer. It also directs the signals from most of the maintenance pushbuttons to the selected processor. Those pushbuttons which must be broadcast in an MP environment, such as System Reset, and those pushbuttons which must be broadcast because of this technique, such as Stop, Start and Impl, are unaffected by the select switch. The maintenance toggle switches are also unaffected by the select switch and are broadcast to both processors.

By intelligent use of this technique, one console can be made to appear as two consoles to the system and most maintenance operations which can be performed on a system with one console per CPU can be duplicated by the console that has been modified.

This will facilitate program control of the console. Instead of the toggle switch mentioned above, a maintenance-control word bit co...