1A Processor: Maintenance Software

Abstract

Comprehensive maintenance software is required to meet the system reliability objective of less than an average of 2 minutes per year of outage from all causes. The function and interrelationship of the four basic maintenance programs (fault recognition and recovery, diagnosis, trouble location, and error analysis) are detailed here. Results of extensive laboratory testing and early field experience indicate that the maintenance objectives will be achieved despite the size and complexity of the 1A Processor.

1A Processor: Control, Administrative, and Utility Software

“…The clients include: (i) maintenance programs that perform actions deferred from interrupt-level maintenance actions, 1 to run to completion. When the common control software receives con trol, it activates client programs in sequence (giving each a "segment" of time) until it has exhausted all the real time allocated to it or until no client requires a time segment.…”

“…The off-line facilities are designed to be used for the isolation of difficult hardware and software problems that cannot be solved by normal maintenance facilities. 1 The following functions are provided for the off-line configuration:…”