Intel 815 manual 183

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

DWord	Bit	Description
1 = BR13	31	Solid Pattern Select: (1 = solid pattern; 0 = no solid pattern)
	30	Reserved. Must be Zero
	29	Mono Source Transparency Mode: (1 = transparency enabled;
		0 = use background)
	28	Mono Pattern Transparency Mode: (1 = transparency enabled;
		0 = use background)
	27	Reserved. Must be Zero
	26	Must Be One (‘1’).
	25:24	Color Depth:
		00 = 8 bit color
		01 = 16 bit color
		10 = 24 bit color
		11 = reserved
	23:16	Raster Operation:
	15:00	Destination Pitch (signed): (13:00 are implemented in Intel® 810 chipset)
2 = BR14	31:16	Destination Height (in scan lines): (28:16 are implemented in Intel® 810 chipset)
	15:00	Destination Width (in bytes): (12:00 are implemented in Intel® 810 chipset)
3 = BR09	31:00	Destination Address: Address of the first byte to be written
		(25:00 are implemented in Intel® 810 chipset)
	31:16	Reserved. Must be Zero
4 = BR11	15:00	Number of Monochrome Source Quadwords - 1: (1 to 64k Quadwords = 64 to
		4M bits)
5 = BR12	31:00	Source Address: (25:00 are implemented in Intel® 810 chipset)
	31:24	Reserved. Must be Zero
6 = BR18	23:00	Source Background Color:
	31:24	Reserved. Must be Zero
7 = BR19	23:00	Source Foreground Color:
	31:24	Reserved. Must be Zero
8 = BR16	23:00	Pattern Background Color:
	31:24	Reserved. Must be Zero
9 = BR17	23:00	Pattern Foreground Color:
A =BR20	31:00	Pattern Data 0: (least significant DW)
B =BR21	31:00	Pattern Data 1: (most significant DW)

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