Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

15.4.9.2.SCLRKVL—Source Color Key Value Low Register

Memory Address Offset:

 

5Ch (R/W)

On-chip Reg. Mem Addr Offset:

3015Ch (RO; debug path)

Default Value:

 

00h

Access:

 

 

see address offset above

Size:

 

 

32 bits

31

24

23

0

 

 

 

 

Reserved

 

Source Key value Low

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

Description

 

 

 

 

 

 

 

31:24

Reserved.

 

 

 

 

 

 

 

23:0

Source Key Value Low. In the format of the source specifies the low end (greater than or equal) of the

 

 

 

range of excluded source pixel data. Software sets bits that it does not want to be included within the

 

 

 

comparison to 0.

 

 

 

 

 

 

1 = Included in comparison

 

 

 

 

 

0 = Not included in comparison

 

 

 

 

 

 

 

 

 

15.4.9.3.SCLRKM—Source Color Key Mask Register

Memory Address Offset:

60h (R/W)

 

 

 

 

On-chip Reg. Mem Addr Offset:

30160h (RO; debug path)

 

 

Default Value:

00h

 

 

 

 

Access:

 

 

see address offset above

 

 

Size:

 

 

32 bits

 

 

 

 

31

30

27

26

 

 

24

 

SourceCo

 

 

Reserved

 

 

 

Source Key Mask Enables

 

nst α

 

 

 

 

 

 

 

 

Blend

 

 

 

 

 

 

 

 

Enable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

16

15

8

 

7

0

 

 

Constant α

Constant α

 

 

 

Constant α

 

 

Red<7:0>

Green <7:0>

 

 

 

Blue<7:0>

 

 

 

 

 

 

 

 

 

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Image 291
Intel 815 manual SCLRKVL-Source Color Key Value Low Register, SCLRKM-Source Color Key Mask Register