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:
Oct. 27, 1998
Filed:
Mar. 21, 1996
Michael J Bowes, Cupertino, CA (US);
Brian A Childers, Santa Clara, CA (US);
Apple Computer, Inc., Cupertino, CA (US);
Abstract
A direct memory access (DMA) controller is connected to the CPU bus of a computer system through a bus interface and is also connected to an I/O bus, which is coupled to one or more I/O controllers. Multiple channels, each corresponding to a particular I/O controller, are contained within the DMA controller. The DMA controller controls DMA transfers between the I/O controllers and the main memory of the system and allows multiple transfers to occur concurrently. The DMA controller controls transfers in part through a first arbiter which arbitrates requests for access to the CPU bus coming from the DMA channels and a second arbiter which arbitrates requests for access to the I/O bus coming from the DMA channels and the CPU.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile