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:
Mar. 14, 1989
Filed:
Oct. 15, 1986
Robert M Maier, San Jose, CA (US);
Allan J Zmyslowski, Sunnyvale, CA (US);
Carolee N Schober, Cupertino, CA (US);
Amdahl Corporation, Sunnyvale, CA (US);
Abstract
The present invention provides for use in a data processor a method for mapping a respective machine language instruction stored by cache storage unit to a respective microprogrammed algorithm stored in control storage unit means, wherein the respective machine language instruction includes an opcode field with a prescribed value and at least one nonopcode field with one of a plurality of values, the method, comprising the steps of in the course of one data processor clock cycle, providing the respective machine language instruction to a decoder for converting the prescribed opcode field and the at least one nonopcode field of the respective machine language instruction into a respective combination of decoded signals which corresponds to the prescribed opcode field value and that at least one nonopcode field value of the respective machine language instruction; and providing the respective combination of decoded signals to combinational logic for converting the respective combination of decode signals into a respective address signal which points to a microprogrammed algorithm stored by the control storage unit means.