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:
Feb. 20, 1990
Filed:
Jan. 27, 1988
Neal S Reynolds, Schaumburg, IL (US);
Robert Woodbury, Carpentersville, IL (US);
Robert J Rzadzki, Crystal Lake, IL (US);
Sun Electric Corp., Crystal Lake, IL (US);
Abstract
A technique for determining and resetting one or more flags in a digital word in memory in which the flags comprise added bits in known locations different from any of the magnitude bits in the word. A sign bit is included and a flag is set by making its bit value differ from that of the sign bit. A digital word from the memory is AND'd with a bit mask to check the flag bit location. A parity routine is run to determine whether the flag bit is set, and if so, the memory location of the word and the type of flag is recorded. The word with the flag bit set is XOR'd with another bit mask to reset the flag bit so that the word may be returned to its memory location with the flag reset.