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. 14, 1997
Filed:
Dec. 01, 1994
Amy L Kulik, Austin, TX (US);
Patrick Maurice Bland, Austin, TX (US);
Dennis Moeller, Boca Raton, FL (US);
William Alan Wall, Austin, TX (US);
Sagi Katz, Haifa, IL;
Suksoon Yong, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and arrangement is provided to support both fast Programmed Input/Output (PIO) and third party Direct Memory Access (DMA) data transfers between a system memory and Integrated Drive Electronics (IDE) drives. A DMA controller attached to an ISA bus supplies address, read and write signals in third party DMA data transfers. An IDE controller provides control signals to support the DMA data transfers. The IDE controller additionally provides address and control signals to support the PIO data transfers at local bus speeds. A local bus-ISA bridge is incorporated to support the system memory that resides on the local bus. An arbitration circuit arbitrates access to the ISA bus, and allows the IDE controller to seize the ISA bus for fast PIO data transfer.