Patent ID: 6040844
Filing Date: 2000-03-21
Classification: G06T

Abstract:
In a picture generating system, the combination comprising:a display;a memory subsystem for storing picture generation data, said memory subsystem having an addressable main memory and an addressable auxiliary memory, said main memory storing picture generation data, said auxiliary memory responsive to said main memory for receiving picture generation data therefrom and for temporarily storing said received picture generation data;a read/write port for accessing said main memory;a dedicated read only port for accessing said auxiliary memory;means for reading/writing certain selected portions of said picture generation data through said read/write port;means for reading other selected portions of said picture generation data through said dedicated read only port when said other selected portions of said picture generation data are present in said auxiliary memory;means for transferring said other selected portions of said picture generation data from said main memory to said auxiliary memory when said other selected portions of said picture generation data are not present in said auxiliary memory; andmeans for processing said certain selected portions of said picture generation data and said other selected portions of said picture generation data to generate picture data for forwarding to said display;wherein said reading/writing means, reading means and transferring means operate in parallel;wherein said certain selected portions of said picture generation data and said other selected portions of said picture generation data are mutually exclusive.