Intel 815 manual 12.3.18. BR17-Pattern Expansion Foreground Color, Reserved. Must be Zero 230

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

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12.3.17. BR16—Pattern Expansion Background & Solid Pattern Color

Memory Offset Address:				40040h
Default:				None
Attributes:				RO; DWord accessible
31		24	23	0
		Reserved. MBZ		Pattern Expansion Background Color Bits [23:0]
	Bit			Descriptions
31:24		Reserved. Must be Zero.
23:0		Pattern Expansion Background Color Bits [23:0]. These bits provide the one, two, three, or four
		bytes worth of color data that select the background color to be used in the color expansion of
		monochrome pattern data during BLT operations.

Whether one, two, three, or four bytes worth of color data is needed depends upon the color depth to which the BLT Engine has been set. For a color depth of 24bpp, 16bpp and 8bpp, bits [23:0], [15:0] and [7:0], respectively, are used.

12.3.18. BR17—Pattern Expansion Foreground Color

Memory Offset Address:				40044h
Default:				None
Attributes:				RO; DWord accessible
31		24	23	0
	Reserved. Must be Zero			Pattern Expansion Foreground Color Bits [23:0]
	Bit			Descriptions
31:24		Reserved. Must be Zero.
23:0		Pattern Expansion Foreground Color Bits [23:0]. These bits provide the one, two, three, or four bytes
		worth of color data that select the foreground color to be used in the color expansion of monochrome
		pattern data during BLT operations.

Whether one, two, or three, or bytes worth of color data is needed depends upon the color depth to which the BLT Engine has been set. For a color depth of 24bpp, 16bpp and 8bpp, bits [23:0], [15:0] and [7:0], respectively, are used.

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