User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

250

DWord Bits Description

0 31:29 Client : 03h – Rendering Engine

28:24 3DState24 : 07h

23:13 Reserved: 0000h

12 Small Triangle Filter Enable Mask :

1 = Update ; 0 = Do Not Update

11 Small Triangle Filter Enable: If Set then Small Triangles i.e triangles which donot cover

any pixels, and are either vertical or horizontal will be filtered out. Note: This should be

enabled only in GFXPrimitive Mode when Pixelization Rule is enabled, and the “Horizontal

& Vertical Bias” values (in the Dest Buffer Packet) are both the same and programmed to

1000 or 0000.

10 Pixelization Rule Mask:

1 = Update ; 0 = Do Not Update

9 Pixelization Rule: This bit should be set in GFXPRIMITIVE MODE for following the

correct Pixelization Rules.

8 Line Strip/List Flat Shaded Vertex Select Mask: 1 = update, 0 = Do Not Update

7:6 Line Strip/List Flat Shaded Vertex Select:

0h = Vertex 0

1h = Vertex 1

2h = Reserved

3h = Reserved

5 Triangle Fan Flat Shaded Vertex Select Enable Mask: 1 = update, 0 = Do Not Update

4:3 Triangle Fan Flat Shaded Vertex Select:

0h = Vertex 0

1h = Vertex 1

2h = Vertex 2

3h = Reserved

2 Triangle Strip/List Flat Shaded Vertex Select Enable Mask:

1 = update, 0 = Do Not Update

0 1:0 Triangle Strip/List Flat Shaded Vertex Select:

0h = Vertex 0

1h = Vertex 1

2h = Vertex 2

3h = Reserved