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:
Aug. 28, 2001
Filed:
Apr. 19, 1999
Yasuyuki Yamamoto, Kanagawa, JP;
Sony Computer Entertainment, Inc., Tokyo, JP;
Abstract
A first bus,and a second bus,are connected through a bus repeater,having a buffer memory, and DMA (Direct Memory Access) controllers,are respectively connected to the buses,and,The bus repeater,can issue DMA request to the respective DMA controllers,and these DMA requests can be masked by respective CPUs,The DMA controller,carries out DMA transfer of data on the bus,between the DMA controller,and the buffer memory within the bus repeater,and the DMA controller,carries out DMA transfer between the buffer memory and the bus,The CPU,masks DMA request of the bus repeater,to directly access the buffer, thereby making it possible to check DMA function. Thus, debugging of the system for carrying out DMA transfer through buffer between different buses is easily carried out.