VT8501 Apollo MVP4

Revision 1.3 February 1, 2000

-iii-

Table of Contents

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VGA Status / Enable Registers ............................................................................................................................................................. 74

VGA Sequencer Registers (SR) ............................................................................................................................................................ 75

VGA RAMDAC Registers .................................................................................................................................................................... 75

VGA Graphics Controller Registers (GR)............................................................................................................................................. 76

VGA CRT Controller Registers (CR) .................................................................................................................................................. 77

Extended Registers – Non-Indexed I/O Ports ....................................................................................................................................... 78

Extended Registers – VGA Sequencer Indexed .................................................................................................................................... 79

Extended Registers – VGA Graphics Controller Indexed ..................................................................................................................... 89

Extended Registers – VGA CRT Controller Indexed............................................................................................................................ 95

Extended Registers – CRTC Shadow.................................................................................................................................................. 109

3D Graphics Engine Registers ........................................................................................................................................... 110

Operational Concept ........................................................................................................................................................................... 110

Drawing............................................................................................................................................................................................... 111

Geometry Primitives............................................................................................................................................................................ 112

Synchronization .................................................................................................................................................................................. 115

Functional Blocks ............................................................................................................................................................................... 115

Bus Interface ....................................................................................................................................................................................... 115

Span Engine......................................................................................................................................................................... 116

Graphics Engine Core ........................................................................................................................................................ 117

Graphics Engine Organization ............................................................................................................................................................ 120

Setup Engine Registers ....................................................................................................................................................................... 121

Vertex Registers .................................................................................................................................................................................. 122

Rasterization Engine Registers............................................................................................................................................................ 123

Pixel Engine Registers ........................................................................................................................................................................ 130

Texture Engine Registers .................................................................................................................................................................... 136

Memory Interface Registers ................................................................................................................................................................ 138

Data Port Area..................................................................................................................................................................................... 138

FUNCTIONAL DESCRIPTIONS ................................................................................................................................................ 139

DFP Interface Configuration ............................................................................................................................................. 139

Power Management States................................................................................................................................................. 140

Power Management Clock Control ................................................................................................................................... 140

Power Management Registers ........................................................................................................................................... 140

ELECTRICAL SPECIFICATIONS ............................................................................................................................................. 141

MECHANICAL SPECIFICATIONS ........................................................................................................................................... 147