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. 05, 1990
Filed:
Mar. 13, 1987
Jonathan Fitch, Cupertino, CA (US);
Ronald Hochsprung, Saragota, CA (US);
Apple Computer, Inc., Cupertino, CA (US);
Abstract
A personal computer system includes a main circuit board having a central processing unit and expansion slots each of which is adapted to receive a printed circuit board card. The main circuit board further includes memory, a 32-bit address bus with control signals associated therewith, and input/output circuitry. The slot is coupled to the 32-bit address bus, which is substantially a NUBUS bus, and the slot includes distinct identification line means which provide the slot with an identification number (distinct number) in the computer system. The computer system reserves 256-megabytes of memory space ranging from location $X000 0000 to location $XFFF FFFF for memory on a card in a slot having a distinct number equal to $X.