Intel 815 manual Instruction Target Opcode 10h, Dword Length 07h, Color Depth, Raster Operation

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

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12.2.2.SETUP_MONO_PATTERN_SL_BLT

This setup instruction supplies common setup information including clipping coordinates used exclusively with the following instruction:

•SCANLINE_BLT (SLB) - 1 scan line of monochrome pattern and destination are the only operands allowed.

Clipping addresses and coordinates are inclusive. (The BLT Engine performs a trivial reject for this BLT before performing any accesses. If any pixels are included within the clipping rectangle, then it performs every access, but deasserts the byte enables for the pixels that are clipped.) These are the only instructions that require state. There are 4 dedicated registers to contain the state for this instruction. The 3 double word registers are: DW1 (Control), DW5 (Background color), and DW6 (Foreground color). The ClipRect registers do not need to be saved since they are never used by the interrupt ring buffer.

Only a positive destination pitch is allowed.

DWord	Bit	Description
0 = BR00	31:29	Client : 02h – 2D Processor
	28:22	Instruction Target (Opcode) : 10h
	21:05	Reserved. Must be Zero
	04:00	Dword Length : 07h
1 = BR01	31	Solid Pattern Select: (1 = solid pattern; 0 = no solid pattern) - (SLB & Pixel only)
	30:29	Reserved. Must be Zero
	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 (positive): (13:00 are implemented in Intel® 810 chipset)
2 = BR02	31:00	ClipRect Y1 Address (Top): (25:00 are implemented inIntel® 810 chipset)
3 = BR03	31:00	ClipRect Y2 Address (Bottom): (25:00 are implemented in Intel® 810 chipset)
4 = BR04	31:16	ClipRect X2 coordinate (Right): (27:16 = 12 bits are implemented in the Intel® 815
		chipset)
	15:00	ClipRect X1 Coordinate (Left): (11:00 = 12 bits are implemented in the Intel® 815
		chipset)
5	31:24	Reserved. Must be Zero
5 = BR05	23:00	Setup Background Color: All
6	31:24	Reserved. Must be Zero
6 = BR06	23:00	Setup Foreground Color: (SLB & TB only)
7 = BR20	31:00	DW0 (least significant) for a Monochrome Pattern:
8 = BR21	31:00	DW1 (most significant) for a Monochrome Pattern:

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