David A Parks

US Patent:

6356983, Mar 12, 2002

Filed:

Jul 25, 2000

Appl. No.:

09/624788

Inventors:

David Parks - Colorado Springs CO

Assignee:

SRC Computers, Inc. - Colorado Springs CO

International Classification:

G06F 1200

US Classification:

711145

Abstract:

A cache coherency directory for a shared memory multiprocessor computer system. A data structure is associated with each cacheable memory location, the data structure comprising locations for storing state values indicating an exclusive state, a shared state, an uncached state, a busy state, a busy uncached state, a locked state, and a pending state. The busy state and pending state cooperate to reserve a cache line for future use by a processor while the cache line is currently being used by one or more other processors.

US Patent:

6594736, Jul 15, 2003

Filed:

Aug 15, 2000

Appl. No.:

09/638365

Inventors:

David Parks - Colorado Springs CO

Assignee:

SRC Computers, Inc. - Colorado Springs CO

International Classification:

G06F 1200

US Classification:

711151, 711153, 711154, 711170, 709217, 710200

Abstract:

A method and apparatus including a plurality of data processing units. A plurality of memory banks having a shared address space are coupled to the processors by a crossbar coupling to enable reading and writing data between the processors and memory banks. A unidirectional network couples the memory banks and the processors to enable cache coherency messages to be transmitted from the memory to the processors. A plurality of semaphore registers are implemented within the shared address space of the memory banks wherein the semaphore registers are accessible by the processors through the crossbar coupling.

US Patent:

44205252, Dec 13, 1983

Filed:

Feb 11, 1982

Appl. No.:

6/347999

Inventors:

David M. Parks - Great Neck NY

International Classification:

B32B 300
B29C 900

US Classification:

428156

Abstract:

Novel thin flexible decorative colored cementitious veneers of about 5 to 60 mils in thickness, useful in wall coverings, floor coverings and on ceilings; and methods of producing said thin decorative cementitious veneers wherein printing, embossing and casting are performed simultaneously. The basic method comprises the steps of placing a wet cloth on a mold engraved with a design followed by placing a plastic cement mix on said wet cloth to simultaneously form a casting and a temporary cloth mold which is the exact copy of the original mold, immediately removing the plastic cement casting together with the temporary cloth mold from the original engraved mold before it sets, thereby making the original mold immediately available for the next casting, removing the temporary cloth mold from said plastic cement casting before it sets, and air curing said casting while being stored.