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:
Jun. 26, 2001
Filed:
Oct. 21, 1998
Nicholas J. N. Murphy, Guildford, GB;
3Dlabs Inc., Ltd., Hamilton, BM;
Abstract
A system and method for improving the efficiency of DMA transfers. In particular, a “continue” command is provided for DMA block transfers. In practice, this command allows the system to begin a DMA transfer before the entire size of the transfer block is known and to continue the transfer, avoiding an additional setup time, by simply instructing the DMAC to continue sending data in the same manner. Transfer continuation is accomplished by resetting the DMA transfer count register to a new value without ever stopping the transfer. Each time the transfer count runs down, the system resets it to a higher value and continues the transfer rather than initializing a second transfer.