[MSDN Library June 1998] Validating Instructions in SvgaHwIoPortXxx (19.6903706050048%)
MSDN Library Visual Studio 6.0 > DDK Documentation > Microsoft Windows NT 4.0 DDK > Graphics Drivers > Design Guide > Part 2: Display and Video Miniport Drivers > Chapter 7 Video Miniport Drivers > VGA-Compatible Miniport's SvgaHwIoPortXxx