Intel 815 manual Instruction Target Opcode 46h, Line

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

DWord	Bit	Description
0 = BR00	31:29	Client : 02h – 2D Processor
	28:22	Instruction Target (Opcode) : 46h
	21:20	Reserved. Must be Zero
	19:17	Monochrome source data bit position of the first pixel within a byte per scan
		line.
	16:08	Reserved. Must be Zero
	07:05	Pattern Vertical Alignment: (which scan line of the 8x8 pattern to start on)
	04:00	Dword Length : 07h
1 = BR13	31:30	Reserved. Must be Zero
	29	Mono Source Transparency Mode: (1 = transparency enabled; 0 = use background)
	28	Reserved. Must be Zero
	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: (address of the first byte of the first pixel on the first scan line)
		(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:
8 = BR15	31:00	Pattern Address: (25:06 are implemented in Intel® 810 chipset)

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