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. 01, 1990
Filed:
Aug. 07, 1989
Applicant:
Inventors:
Yuan-Chang Lo, San Jose, CA (US);
Dennis L Moeller, Delray Beach, FL (US);
John J Szarek, Boca Raton, FL (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364900 ; 3649439 ;
Abstract
A microcomputer system has a first, low order address, memory soldered to the planar printed circuit board and can accept further memory pluggable into a socket on the board. At power on self test, the memories are tested, and, if an error is detected in the first memory, this memory is disabled by directing the lowest order memory addresses to the second memory and reducing the highest order addresses by the number of locations in the first memory.