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:
Mar. 01, 1994
Filed:
Apr. 27, 1992
Dean Drako, Cupertino, CA (US);
Steven Roskowski, Sunnyvale, CA (US);
Apple Computer, Inc., Cupertino, CA (US);
Abstract
A direct memory access controller including apparatus for storing an address to which information is to be written or from which information is to be read, apparatus for storing data related to the address, apparatus for storing a value indicative of a width of a block of data to be transferred, apparatus for storing a value indicative of a total amount of information to be transferred, apparatus for storing a value indicating a number of addresses to be bypassed during a transfer, apparatus for incrementing the address while decrementing the value indicative of the width of the block and the value indicative of the total amount of information to be transferred until the width of the block has been crossed, and apparatus for changing the address by the value indicating a number of addresses to be bypassed during a transfer when the width of the block has been crossed, and apparatus for resetting the value indicative of a width of a block of data to be transferred to the original value when the width of the block has been crossed.