User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

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12.2.5. TEXT_BLT

All monochrome source scan lines and pixels that fall within the ClipRect Y addresses and X coordinates

are written (ignoring the raster operation) to (Destination Y Address + Destination X coordinate * bytes

per pixel). Source expansion color registers are always in the SETUP_BLT.

Note: All graphics controller BR03 fields (monochrome clipping parameters) are computed by the hardware

while performing clipping.

DWord Bit Description

0 = BR00 31:29 Client : 02h – 2D Processor

28:22 Instruction Target (Opcode) : 22h

21:17 Reserved. Must be Zero

16 Bit (0) / Byte (1) packed: Byte packing is used for the Windows* NT* driver

04:00 Dword Length : 04h

1 = BR08 31:16 Destination X2 Coordinate: (Ending - Right)

(27:16 = 12 bits are implemented in the Intel

815 chipset)

15:00 Destination X1 Coordinate: (Starting - Left) - X2 - X1 + 1 = width in pixels

(11:00 = 12 bits are implemented in the Intel

815 chipset)

2 = BR09 31:00 Destination Y1 Address: (address of the first pixel on the first scan line)

(25:00 are implemented in Intel

810 chipset)

3 = BR10 31:00 Destination Y2 Address: (address of the first pixel on the last scan line)

(25:00 are implemented in Intel

810 chipset)

4= BR11 31:16 Reserved. Must be Zero

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)