Computer graphics processing and selective visual display system – Computer graphic processing system – Interface
Reexamination Certificate
2006-04-11
2006-04-11
Chauhan, Ulka J. (Department: 2671)
Computer graphics processing and selective visual display system
Computer graphic processing system
Interface
C713S320000, C713S323000, C713S324000, C713S330000, C713S340000, C710S305000, C345S531000, C345S532000, C345S533000
Reexamination Certificate
active
07027057
ABSTRACT:
An interface between an accelerated graphics port graphics controller (AGP-GC) and a core controller to prevent entry into a low power state from interfering with transfers to or from the AGP-GC that have been requested but not completed. The core controller can communicate to the AGP-GC an intent to enter a low power state, while the AGP-GC can communicate to the core controller the busy status of the AGP-GC. When the AGP-GC receives notice of an intent to enter a low power state, it can stop issuing requests to the core controller. When the core controller detects that the AGP-GC is busy, the core controller can postpone entry into the low power state until the AGP-GC completes any requests that are in progress. In an alternate use of the interface, if the AGP-GC wishes to make a request during a low power state, it can signal the core controller of this need by indicating a busy status, which can trigger the core controller to initiate an exit from the low power state.
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Cline Leslie E.
Cohen Debra T.
Cooper Barnes
Jain Satchit
Nanduri Anil V.
Chauhan Ulka J.
Intel Corporation
Singh Dalip K.
Travis John F.
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