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:
Jan. 04, 1994
Filed:
Jan. 15, 1992
Applicant:
Inventor:
Akira Takayama, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395425 ; 395275 ; 364D / ; 3642402 ; 3642423 ; 364 2492 ;
Abstract
Communication-control equipment having data-processor, primary storage for storing process data of the data-processor, secondary storage for storing DMA data as well as the process data, and DMA bus for transferring only the DMA data communicated between the secondary storage and a transmission or receiving buffer. The data-processor can communicate with the primary storage during DMA data transfer, because the DMA data are transferred through the DMA bus and so the address bus and data bus connecting data-processor and the primary storage are available during the DMA transfer.