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:
Apr. 06, 1999
Filed:
Dec. 30, 1996
Applicant:
Inventors:
J Glen Rockford, Wading River, NY (US);
Jeffrey C Dunnihoo, Austin, TX (US);
Richard E Wahler, Lake Ronkonkoma, NY (US);
Assignee:
Standard Microsystems Corp., Hauppauge, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395652 ; 395830 ;
Abstract
An interface that allows the host CPU and the keyboard controller in a PC to share a common BIOS ROM includes a logic circuit that receives a set of input signals and produces a set of signals that emulates a jump instruction op-code that causes the host CPU to vector to a specified address location in the system memory map normally reserved for the system ROM BIOS code, whenever both the host CPU and keyboard controller are contending for access to the BIOS ROM.