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. 06, 2001
Filed:
Aug. 07, 1998
Applicant:
Inventors:
Steven E. Olson, San Jose, CA (US);
Jhy-Ping Shaw, San Jose, CA (US);
Assignee:
Oak Technology, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/300 ;
U.S. Cl.
CPC ...
G06F 1/300 ;
Abstract
A method and apparatus for dynamic chaining of DMA operations that includes a count to keep track of control blocks associated with such operations when appended to a current chain of control blocks. The count is checked by a DMA controller upon completing the data-transfer operation associated with each block or each control-block chain depending on the use of a wait bit. Memory used to hold control blocks may be preallocated with anticipated control blocks associated in a predefined linked list to avoid the need for subsequently updating existing control blocks when new blocks are appended to a chain.