Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

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.

 

 

 

 

 

 

 

288

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Intel 815 manual Overlay Destination Color Key Registers, DCLRKV-Destination Color Key Value Register