05245702 is referenced by 49 patents and cites 6 patents.

A method for allowing direct graphics access to backup storage areas in frame buffer memory used for retained windows and controlled by a graphics accelerator which includes the steps of establishing a shared memory file in system memory for the backup storage area indicating that the retained windows area initially exists in excess frame buffer memory, the shared memory file having storage to indicate the use of the shared area by a process; generating a page fault whenever access to the graphics accelerator is attempted and the state of another process is stored on the graphics accelerator; and calling a device driver in response to the page fault to switch the context stored on the graphics accelerator to that of the process attempting the access.

Title
Method and apparatus for providing shared off-screen memory
Application Number
7/726304
Publication Number
5245702
Application Date
July 5, 1991
Publication Date
September 14, 1993
Inventor
Robert Rocchetti
Cupertino
CA, US
Curtis Priem
Fremont
CA, US
Bruce McIntyre
Cupertino
CA, US
Agent
Blakely Sokoloff Taylot & Zafman
Assignee
Sun Microsystems
CA, US
IPC
G06F 15/20
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