Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

DWord

Bits

Description

 

 

 

0

31:29

Client : 03h – Rendering Engine

 

 

 

 

28:24

3DStateMWNP (Non-pipelined) : 1Dh

 

 

 

 

23:16

Opcode : 80h

 

 

 

 

15:0

DWORD_LENGTH : 3

 

 

 

1

31

Drawing/Scissor Rectangle clipping Enable (for validation purpose only). This bit

 

 

should be set to enable in normal mode.

 

 

0 = Enable

 

 

1 = Disable

 

 

 

 

30:28

Reserved: 00h

 

 

 

 

27:26

X Bias: A 2-bit value of x bias for dithering compensation

 

 

 

 

25:24

Y Bias: A 2-bit value of y bias for dithering compensation

 

 

 

 

23:0

Reserved: 00h

 

 

 

2

31:16

Clipped DR Ymin: Y coordinate of upper left corner of drawing rectangle after being

 

 

clipped to screen boundary. Only the lower 10 bits in U10 format is used by hardware.

 

 

This value is a pixel-aligned, unsigned integer, and reference to the upper-left corner

 

 

of the 2D buffer defined in the dest buffer info packet.

 

 

 

 

15:0

Clipped DR Xmin: X coordinate of upper left corner rectangle after being clipped to

 

 

screen boundary. Only the lower 11 bits in U11 format is used by hardware. This

 

 

value is a pixel-aligned, unsigned integer, and reference to the upper-left corner of the

 

 

2D buffer defined in the dest buffer info packet.

 

 

 

3

31:16

Clipped DR Ymax: Y coordinate of lower right corner rectangle after being clipped to

 

 

screen boundary. Only the lower 10 bits in U10 format is used by hardware. This

 

 

value is a pixel-aligned, unsigned integer, and reference to the upper-left corner of the

 

 

2D buffer defined in the dest buffer info packet.

 

 

 

 

15:0

Clipped DR Xmax: X coordinate of lower right corner rectangle after being clipped to

 

 

screen boundary. Only the lower 11 bits in U11 format is used by hardware. This

 

 

value is a pixel-aligned, unsigned integer, and reference to the upper-left corner of the

 

 

2D buffer defined in the dest buffer info packet.

 

 

 

4

31:27

Reserved

 

 

 

 

26:16

DR origin Y: Origin of the Y coordinate of the drawing rectangle before being clipped

 

 

to screen boundary. The value is S10 in 2’s complement format. This value is a pixel-

 

 

aligned, and reference to the upper-left corner of the 2D buffer defined in the dest

 

 

buffer packet.

 

 

 

 

15:12

Reserved

 

 

 

 

11:0

DR origin X: Origin of the X coordinate of the drawing rectangle before being clipped

 

 

to screen boundary. The value is S11 in 2’s complement format. This value is a pixel-

 

 

aligned, and reference to the upper-left corner of the 2D buffer defined in the dest

 

 

buffer packet.

 

 

 

244

Page 244
Image 244
Intel 815 manual 3DStateMWNP Non-pipelined 1Dh, Opcode 80h