Monitor circuit for detecting noise conditions through input out

Details Monitor circuit for detecting noise conditions through input out Monitor circuit for detecting noise conditions through input out

1990-06-01

1993-11-16

Harrell, Robert B.

Boots, shoes, and leggings

364DIG2, 3649439, G06F 1100, G06F 1130

Patent

active

052631702

ABSTRACT:
A monitor circuit is provided, which includes a data storage unit having dummy data stored therein, a buffer circuit connected to the output of the data storage unit, a coincidence circuit for comparing the data on the I/O bus connected between the buffer circuit and I/O units with the dummy data of the data storage unit, and a flag circuit for setting an abnormal flag responsive to the non-coincidence output from the coincidence circuit. During the I/O refresh of a PC, such an abnormal flag is set in response to a disturbance of the I/O bus. The I/O refresh is repeatedly performed in the event the flag is set.

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