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:
Oct. 24, 1989
Filed:
Apr. 06, 1988
Applicant:
Inventor:
William D Mensch, Jr, Mesa, AZ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ; G06F / ;
U.S. Cl.
CPC ...
364200 ; 3642328 ; 3642611 ; 3642323 ; 3642548 ; 3642549 ;
Abstract
A sixteen bit microprocessor includes an emulation bit that is loaded into an instruction register with 8 bit op codes. If the emulation bit is a '1', the 16 bit microprocessor operates internally as a 6502 type eight bit microprocessor, thereby emulating a 6502 microprocessor. If the emulation bit is set to a '0', the 16 bit microprocessor executes an instruction set of which the 6502 instruction set is a subset to effectuate internal 16 bit operation.