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:
Sep. 15, 1992
Filed:
Aug. 31, 1989
Applicant:
Inventor:
Jerry L Ballard, Aledo, TX (US);
Assignee:
Tandy Corporation, Fort Worth, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ; G11C / ;
U.S. Cl.
CPC ...
395425 ; 365222 ; 36523008 ;
Abstract
A system for refreshing dynamic random access memory that does not request the bus from the CPU prior to performing a refresh operation. The system initiates a refresh operation when the end of a CPU bus cycle is signalled and stores status and address data if the CPU initiates a new CPU bus cycle prior to the completion of the refresh operation.