Intel 815 manual Colorblt, Instruction Target Opcode 40h, Dword Length 03h, Solid Pattern Color

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

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12.2.7.COLOR_BLT

COLOR_BLT is the simplest BLT operation. It performs a color fill to the destination (with a possible ROP). The only operand is the destination operand, which is written dependent on the raster operation. The solid pattern color is stored in the pattern background register.

•This instruction is optimized to run at the maximum memory write bandwidth.

•Only a positive destination pitch is allowed.

•The typical Raster operation code = F0 which performs a copy of the pattern background register to the destination.

DWord	Bit	Description
0 = BR00	31:29	Client : 02h – 2D Processor
	28:22	Instruction Target (Opcode) : 40h
	21:05	Reserved. Must be Zero
	04:00	Dword Length : 03h
1 = BR13	31	Solid pattern select: (1 = solid pattern). Must be 1.
	30:27	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 (positive): (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)
4 = BR16	31:24	Reserved. Must be Zero
	23:00	Solid Pattern Color:

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