The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 1993
Filed:
Jun. 01, 1990
Applicant:
Inventor:
Yukio Kato, Sunto, JP;
Assignee:
Omron Tateisi Electronics, Co., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
395800 ; 364D / ; 3649439 ;
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.