James S Lindeman

US Patent:

60030178, Dec 14, 1999

Filed:

May 30, 1997

Appl. No.:

8/866427

Inventors:

Anton B. Rang - Hudson WI
Kin C. Doe - Union City CA
Gordon A. Minami - San Jose CA
Daniel Olin Skeen - Morgan Hill CA
Tonghan Tee - Milpitas CA
James Lindeman - Fremont CA
Peter Cheung - Milpitas CA

Assignee:

Adaptec, Inc. - Milpitas CA

International Classification:

H04L 1200

US Classification:

705 35

Abstract:

A PCI to SCSI host adapter circuit is provided for use with different types of host platforms. The host adapter includes logic and controller circuits, and a memory having multiple drivers and a bank switching instruction set stored therein. During initialization, the first driver is loaded into the host's memory if the host's processor is of a compatible type. Otherwise, the bank switching instruction set is loaded into the host's memory and interpreted by the host's processor. During interpretation, the bank switching instruction set causes the host's processor to signal the logic circuit to request that the controller circuit re-map another driver to the location of the first driver in the memory. After this bank switching has occurred, the selected driver is loaded into the host's memory, provided of course that the host's processor is of a compatible type. This process may be repeated until the appropriate code type is found or the host processor is not supported.

US Patent:

61050946, Aug 15, 2000

Filed:

Jan 26, 1998

Appl. No.:

9/013498

Inventors:

James R. Lindeman - Fremont CA

Assignee:

Adaptec, Inc. - Milpitas CA

International Classification:

G06F 1314

US Classification:

710107

Abstract:

A computer system incorporating an apparatus for allocating exclusive shared resource requests includes a shared resource, a first type device coupled to the shared resource and a second type device coupled to the shared resource. The computer system also includes an arbitrator unit coupled to the shared resource capable of granting the second type device exclusive access to the shared resource by preventing the first type device from being granted exclusive access to the shared resource. The arbitrator unit prevents the first type device from being granted exclusive access to the shared resource for at least a duration of time after the second type device has completed an associated second type shared resource transaction.