Patents by Inventor Stewart R Sargaison

Stewart R Sargaison has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • DMA AND GRAPHICS INTERVACE EMULATION
    Publication number: 20110072171
    Abstract: An emulator schedules emulation threads for DMA emulation and other emulation functions in a time-multiplexed manner. Emulation threads are selected for execution according to a load balancing scheme. Non-DMA emulation threads are executed until their execution time period expires or they stall. DMA emulation thread execution is allowed to execute indefinitely until the DMA emulation thread stalls. The DMA emulation thread prefetches additional adjacent data in response to target computer system DMA requests. Upon receiving a target computer system DMA request, the DMA emulation thread first checks to the prefetched data to see if this data matches the request. If so, the request is fulfilled using the prefetched data. If the prefetched data does not match the target computer system DMA request, the DMA emulation thread fetches and stores the requested data and additional adjacent data for potential future use.
    Type: Application
    Filed: December 1, 2010
    Publication date: March 24, 2011
    Applicant: Sony Computer Entertainment Inc.
    Inventors: Victor O. Suba, Stewart R. Sargaison, Brian M. C. Watson
  • DMA and graphics interface emulation
    Patent number: 7870307
    Abstract: An emulator schedules emulation threads for DMA emulation and other emulation functions in a time-multiplexed manner. Emulation threads are selected for execution according to a load balancing scheme. Non-DMA emulation threads are executed until their execution time period expires or they stall. DMA emulation thread execution is allowed to execute indefinitely until the DMA emulation thread stalls. The DMA emulation thread prefetches additional adjacent data in response to target computer system DMA requests. Upon receiving a target computer system DMA request, the DMA emulation thread first checks to the prefetched data to see if this data matches the request. If so, the request is fulfilled using the prefetched data. If the prefetched data does not match the target computer system DMA request, the DMA emulation thread fetches and stores the requested data and additional adjacent data for potential future use.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: January 11, 2011
    Assignee: Sony Computer Entertainment Inc.
    Inventors: Victor O Suba, Stewart R Sargaison, Brian M. C. Watson
  • DMA and Graphics Interface Emulation
    Publication number: 20070260446
    Abstract: An emulator schedules emulation threads for DMA emulation and other emulation functions in a time-multiplexed manner. Emulation threads are selected for execution according to a load balancing scheme. Non-DMA emulation threads are executed until their execution time period expires or they stall. DMA emulation thread execution is allowed to execute indefinitely until the DMA emulation thread stalls. The DMA emulation thread prefetches additional adjacent data in response to target computer system DMA requests. Upon receiving a target computer system DMA request, the DMA emulation thread first checks to the prefetched data to see if this data matches the request. If so, the request is fulfilled using the prefetched data. If the prefetched data does not match the target computer system DMA request, the DMA emulation thread fetches and stores the requested data and additional adjacent data for potential future use.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 8, 2007
    Applicant: Sony Computer Entertainment Inc.
    Inventors: Victor O. Suba, Stewart R. Sargaison, Brian M.C. Watson