| 摘要 |
A video controller that enables applications operating in a protected, multiprocessing system to update a video memory at native speeds. In this system and method, each application is assigned a separate physical address region that identifies an alias of an application's window in the video memory. The separate physical address regions provide an addressing mechanism for an application to identify a referenced set of pixels sought to be accessed. A window mapping function within the video controller that performs only those portions of a video memory access request that references pixels contained within a visible portion of an application's window as defined by priority, size and position information in a control structure.
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