User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
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15.4.8. Overlay Destination Color Key Registers
Used for YUV sources only. Adjustments are made before the RGB conversion.
15.4.8.1. DCLRKV—Destination Color Key Value Register
Memory Address Offset: 50h (R/W)
On-chip Reg. Mem Addr Offset: 30150h (RO; debug path)
Default Value: 00h
Access: see address offset above
Size: 32 bits
31 24 23 0
Reserved Destination Color Key Value
Bit Description
31:24 Reserved.
23:0 Destination Color Key Value. In the format of the destination (screen). This can only be used when
the screen is used as the destination (not TV). When the overlay is directed to TV output, this value
replaces pixels that have been suppressed by the source color key.