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. 03, 1985
Filed:
Jan. 05, 1984
Lloyd I Dickman, Sudbury, MA (US);
William D Strecker, Harvard, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A central processor for use in a data processing system that is adapted for processing sequences of characters. Information identifying a string of characters to be examined, including the memory location for the first character in the sequence and the total number of characters in the sequence, is placed in working registers of the central processor. Other working registers in the central processor receive information corresponding to a predetermined characteristic, which may be a specific character or information identifying another character string. One of several character string instructions then can be processed. In response to a typical character string instructuion, the central processor retrieves each character from the memory and compares it with the predetermined characteristic. Processing continues until either the predetermined characteristic is detected or all the characters in the character string are examined. During processing, the central processor controls an arithmetic-logic condition code during each comparison. When the processing terminates, the condition code indicates whether the character string contained the predetermined characteristic.