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. 02, 1978
Filed:
Oct. 04, 1976
Thomas F Joyce, Burlington, MA (US);
Michel M Raguin, Medford, MA (US);
Honeywell Information Systems Inc., Waltham, MA (US);
Abstract
A method and an apparatus for improving the speed of executing instructions and reducing the microprogram memory requirements in a conventional digital computer system by eliminating a ROM address register for addressing microwords. The method or apparatus incorporates the use of a predetermined bit position in the microinstruction word which is set to a binary one when the microword is the last microword of an executing microprogram. The apparatus is responsive to the electronic representation of the binary one signal to cause the microinstruction execution sequence to branch to a predetermined location in the microprogram memory for execution of the following microinstruction; thus eliminating one ROM address register and at least one step in returning to a common address for starting the execution of another microprogram.