Intel 815 manual 15.4.11. OV0CMD-Overlay Command Register

Models: 815

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Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

15.4.11. OV0CMD—Overlay Command Register

Memory Address Offset:

68h (R/W)

On-chip Reg. Mem Addr Offset:

30168h (RO; debug path)

Default Value:

00h

Access:

see address offset above

Size:

32 bits

This register provides the data the overlay engine needs to begin work. A write to this register sets an internal bit (readable by the status) that will cause all the register values that were written to be internally latched and become active on the next VBLANK event.

31

30

 

28

27

 

 

 

25

24

Sel. Top

Vertical Chrom Filter

 

Vertical Luminance Filter

Horiz

OV

 

 

 

 

 

 

 

 

Chrom

(Rsvd)

 

 

 

 

 

 

 

 

Filter

 

 

 

 

 

 

 

 

 

[24:22]

 

 

 

 

 

 

 

 

 

 

23

22

21

 

 

19

18

 

17

16

Horiz. Chrom Filter

Horizontal Luminance Filter

 

 

Mirroring

Y Adj

(cont)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

14

13

 

 

 

 

10

9

8

4:2:2: Byte Order

 

Source Format

 

 

 

Flip TV-

Flip Qual

 

 

 

 

 

 

 

 

Out Field

[8:7]

 

 

 

 

 

 

 

 

Sel.

 

 

 

 

 

 

 

 

 

 

 

7

6

5

4

3

 

2

 

1

0

Flip Qual

Vert. Initial

Disp Flip

Ignore Buf

Reserved

 

Buffer and Field

Overlay

(Cont)

Phase Sel.

Type

and Field

 

 

 

 

 

Enable

 

 

 

 

 

 

 

 

 

 

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Page 294
Image 294
Intel 815 manual 15.4.11. OV0CMD-Overlay Command Register