Browse Prior Art Database

Automatic Initial Program Load Mode

IP.com Disclosure Number: IPCOM000046578D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Kelly, KF: AUTHOR

Abstract

Providing an automatic initial program load mode increases availability and reduces the need for an attended central processing unit. Certain systems have a need for software to cause a system initial program load when a software or hardware error is detected or on demand via a user command. Providing this ability increases availability, and the need for an attended computer is reduced. The specific technique employed is that, when the software system detects an error which would normally cause the system to stop, requiring manual intervention, a check is made to determine if the system is operating in the automatic initial program load mode.

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Automatic Initial Program Load Mode

Providing an automatic initial program load mode increases availability and reduces the need for an attended central processing unit. Certain systems have a need for software to cause a system initial program load when a software or hardware error is detected or on demand via a user command. Providing this ability increases availability, and the need for an attended computer is reduced. The specific technique employed is that, when the software system detects an error which would normally cause the system to stop, requiring manual intervention, a check is made to determine if the system is operating in the automatic initial program load mode. If operation is in such a mode, a command is issued to all still-active devices, the channels are hardware reset via instruction, and the chain of channel command words that are constructed implicitly by an initial program load device has this chain run against it. Control is then transferred to a bootstrap record that is read from the initial program load device.

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