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. 02, 2003
Filed:
Mar. 23, 2000
Yasuhiro Sota, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A DMA transfer device according to the present invention allows data to be transferred from non-consecutive addresses. A logical address controller checks if logical addresses of data transferred from an input/output bus are consecutive. If they are not consecutive, the logical address controller sends an address non-consecutive interrupt to an input/output controller. The input/output controller sets a physical address, corresponding to the logical address received from the input/output bus, into a physical address controller. The physical address controller checks if a page change has occurred in the physical address and, if it detects the page change, sends a page change interrupt to the input/output controller.