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:
Dec. 27, 1994
Filed:
Jul. 31, 1991
James M Stager, Cupertino, CA (US);
Hsueh-Shun Hsu, San Jose, CA (US);
Toyo Corporation, Tokyo, JP;
Abstract
A variable value monitoring system and method acquires and displays data information words having addresses within a certain range. In one mode of operation, data information words having addresses within a predetermined range are selected and stored in a shadow RAM and only changes in that data are presented to a viewer. The viewer can select the display format for a panel of data contained within the predetermined range of addresses. A FIFO memory temporarily stores the variable values of selected data information words. A flag memory stores flag bits at internal addresses corresponding to each address in a predetermined block of external addresses. Status bit are provided for each data word addressed by the predetermined block of addresses and means are provided for logically comparing the flag bits with corresponding status bits and for storing a data information word in the FIFO if the logical comparison is true. Display and permanent storage of the FIFO information are provided using a personal computer system.