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Overlay control circuit and method

  • US 20060044328A1
  • Filed: 08/26/2004
  • Published: 03/02/2006
  • Est. Priority Date: 08/26/2004
  • Status: Abandoned Application
First Claim
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1. A graphics controller for providing main image data and overlay image data to a display device, comprising:

  • a memory for storing the main image data and the overlay image data;

    an indicating circuit for producing an indicating signal that, in an active state, indicates that a particular location in the display device is to be represented by the overlay image data; and

    an overlay control circuit for fetching the main image data from said memory and being adapted to respond to a transition in said indicating signal to said active state by halting said fetching.

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