System for detecting the malfunction of a CPU including a watchd

Details System for detecting the malfunction of a CPU including a watchd System for detecting the malfunction of a CPU including a watchd

1992-07-17

1995-03-14

Nguyen, Hoa T.

Excavating

371 681, 371 61, 371 62, G06F 1100, G06F 1132

Patent

active

053983327

ABSTRACT:
A system for detecting the malfunction of a CPU (Central Processing Unit) is disclosed. A watchdog timer applies an interrupt signal to the CPU on detecting the malfunction of the CPU. In response to the interrupt signal, the CPU executes interrupt processing to increment the number of times that the CPU has malfunctioned stored in a nonvolatile memory. As the number of times stored in the nonvolatile memory reaches a predetermined value, the CPU displays an alarm message on a display.

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IBM Technical Disclosure Bulletin, vol. 24, No. 7B, Dec. 1981, Quinlan, W. P., Clock Monitor Reset Circuit.

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