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:
Jun. 12, 1990
Filed:
Jun. 10, 1988
Tsuyoshi Mori, Ayase, JP;
Seishi Okada, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A microcode reading control system in an information processing system wherein a machine instruction is divided into microcode instructions as a plurality of steps, each step is further divided into a plurality of stages, and the stages of the microcode instructions are processed in parallel with advanced retrieval control, a first aspect of which provides duplexed control storages storing the microcode instructions read in at a first step of the machine instruction, one of the control storages being read only at the first step of a branch target machine instruction of a branch machine instruction, and a second aspect of which provides a first control storage storing microcode instructions to control the first steps of the machine instructions and a second control storage storing microcode instruction to control the second steps and thereafter of the machine instructions, the first control storage reading the stored microcode instruction at the second stage of the first step of the machine instruction, and the second control storage reading at the first stage of the second step and thereafter of the machine instructions. Thus, in a processing of the branch machine instruction, the control can be accelerated.