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Method and apparatus for extending BIOS control of screen display beyond operating system boot process

  • US 6,477,642 B1
  • Filed: 06/18/1999
  • Issued: 11/05/2002
  • Est. Priority Date: 06/18/1999
  • Status: Expired due to Term
First Claim
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1. A method of controlling a video controller, comprising:

  • configuring a video controller to write data to an unused area of a video memory;

    configuring the video controller to display the data in the unused area of video memory on a display screen;

    a configuring the video controller so that additional data is written to a second area in video memory;

    starting an operating system;

    intercepting an access to the video controller; and

    determining if said operating system is attempting to set said video controller to a runtime video mode by interrogating one or more parameters of said access, and if so, configuring the video controller to display the additional data written in the second area of video memory.

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