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:
May. 27, 1997
Filed:
Jan. 06, 1995
Philip G Emma, Danbury, CT (US);
Joshua W Knight, III, Mohegan Lake, NY (US);
Thomas R Puzak, Ridgefield, CT (US);
James R Robinson, Essex Junction, VT (US);
A James Van Norstrand, Jr, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer processing system includes a first memory that stores instructions belonging to a first instruction set architecture and a second memory that stores instructions belonging to a second instruction set architecture. An instruction buffer is coupled to the first and second memories, for storing instructions that are executed by a processor unit. The system operates in one of two modes. In a first mode, instructions are fetched from the first memory into the instruction buffer according to data stored in a first branch history table. In the second mode, instructions are fetched from the second memory into the instruction buffer according to data stored in a second branch history table. The first instruction set architecture may be system level instructions and the second instruction set architecture may be millicode instructions that, for example, define a complex system level instruction and/or emulate a third instruction set architecture.