SYSTEM FOR COUNTERMEASURE AGAINST POWER SOURCE FAULT IN ELECTRONIC COMPUTER

摘要

PURPOSE:To preserve processing contents at the time of disconnecting a power source, to enable continuously executing the processing after the power source is restored and also to facilitate the restoration processing at the time of disconnecting the power source. CONSTITUTION:A condensed equipment 20 maintaining the operation of an electronic computer system for fixed time after a power source disconnection preliminary-announce signal 100 from a power source disconnection preliminary- announce means 10 is generated and a copying means 50 preserves the contents of a main storage device 40 in a nonvolatile memory 60 when the power source disconnection preliminary-announce signal is originated from the power source disconnection preliminary-announce means 10. The contents of the nonvolatile memory are inspected at the time of starting a system after the restoration of a power source fault and the system starting processing is continued when information is not preserved. When information is stored, the information is restored to the main storage device 40. Thus, conditions at the time of power source disconnection is reproduced concerning the state of the main storage device 40 and the processing can be continued.