Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

Bit

 

Description

 

 

15:14

4:2:2 Byte Order. Affects the byte order for 4:2:2 data. For other data formats these bits should be set

 

to zero.

 

00 = Normal

 

01 = UV Swap

 

10 = Y Swap

 

11 = Y and UV swap

13:10

Source Format.

 

0000

= Reserved

 

0001

= Reserved

 

0010

= RGB 5:5:5

 

0011

= RGB 5:6:5

 

0100

= Reserved

 

0101

= Reserved

 

0110

= Reserved

 

0111

= Reserved

 

1000

= YUV 4:2:2

 

1001

= YUV 4:1:1

 

1010

= Reserved

 

1011

= Reserved

 

1100

= YUV 4:2:0 (MPEG-1 or 2)

 

1101

= Reserved

 

1110

= YUV 4:1:0

 

1111

= Reserved

9

Flip TV-Out Field Select. Selects which TV-Out field polarity for flips

 

0 = Between F0 and F1

 

1 = Between F1 and F0

8:7

Flip Qualification. Flip Qualification (& Display VBLANK). Flips can be caused automatically by the

 

capture port logic on the completion of a field or frame capture. This event will be synchronized either

 

with the display/overlay VBLANK event or the display/overlay VBLANK event combined with the

 

current TV field. Manual flips can occur by an update of the overlay registers due to the writing of the

 

Overlay Update Address Register when the register data specifies that the buffer/field should be

 

changed or through a command packet that specifies a register update that changes the buffer/field.

 

This can also be synchronized with the TV field.

 

Manual flip command

 

00 = Flip (standard)

 

01 = Flip & TV-Out Field #

 

Automatic flipping

 

10 = Capture Frame/field

 

11 = Capture Frame/field & TV-Out Field #

 

11 = is a Reserved encoding for Intel® 810 chipset

6

Vertical Initial Phase Select. Selects which initial vertical phase register to use. The choice is to

 

always use the same register or alternate (for field processing) between the two registers.

 

This bit will be overridden by the capture port when autoflipping.

 

0 = Use only field/buffer 0 initial vertical phase

 

1 = Use both initial vertical phase values

 

 

 

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Intel 815 manual Source Format, Manual flip command, Automatic flipping