Browse Prior Art Database

Video BIOS Standard Video Default Setting

IP.com Disclosure Number: IPCOM000129136D
Publication Date: 2005-Sep-28
Document File: 2 page(s) / 59K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that allows the video BIOS (vBIOS) to revert back to a default VGA timing configuration setting when a hot key is activated. Benefits include a solution that introduces minimal code into the current vBIOS, and uses the current vBIOS video BIOS table (VBT) architecture.

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Video BIOS Standard Video Default Setting

Disclosed is a method that allows the video BIOS (vBIOS) to revert back to a default VGA timing configuration setting when a hot key is activated. Benefits include a solution that introduces minimal code into the current vBIOS, and uses the current vBIOS video BIOS table (VBT) architecture.

Background

Currently, vBIOS allows a real mode display output during system Power On Self Test (POST), and before entering the Operating System (OS) that displays output through the graphic driver. For some custom displays (e.g. edid-less display, added encoders, wide screen display), the video BIOS must be configured accordingly. However, without the proper configuration setting for the vBIOS, there is a possibility that it will not display any output on the appropriate display. Therefore, the user will not see any POST message output on the screen and the real mode keyboard inputs will not be seen, causing the possibility of system not be able to boot to the Operating System stage. For integrated graphics chipsets with only one VGA plane, enabling dual display poses a problem where both displays might not have any output. In this case, the system developer must re-flash the firmware hub with a newly configured vBIOS, then re-run the process until the appropriate display timing is met. Also, once a customer replaces any displays (with a different type of display) there is a possibility the timing will not work and nothing will be displayed.

General Description

The disclosed method allows the vBIOS to revert back to a default VGA timing configuration s...