16_WD90C26.pdf part of Western Digital 16 WD90C26 16_WD90C26.pdf, Western Digital _dataBooks 1992_SystemLogic_Imaging_Storage 16

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WD90C26

TABLE OF CONTENTS
Section Title Page
1.0 INTRODUCTION 16-1
1.1 Scope 16-1
1.2 Features 16-1
1.3 General Description 16-1

2.0 ARCHITECTURE 16-3
2.1 System Interface Logic 16-3
2.2 CRT Controller 16-3
2.3 Video Sequencer 16-3
2.4 Video Graphics Controller 16-3
2.5 Video Attribute Controller 16-3
2.6 RAMDAC 16-4
2.7 FLAT-PANEL ADAPTER 16-4
2.7.1 Color to Gray Scale Conversion 16-4
2.7.2 Gray Scale Mapping 16-4
2.7.3 Gray Shade Dithering 16-4
2.7.4 Color STN Dithering 16-4
2.7.5 Color TFT Panel Dithering Circuitry 16-4
2.7.6 Direct 12-Bit TFT Panel Support 16-4
2.7.7 Row Buffering 16-4
2.7.8 Frame Buffering 16-4
2.7.9 Panel Format Conversion 16-5
2.8 Display Memory Interface 16-5
2.9 Power-down Control 16-5

3.0 INTERFACES 16-7
3.1 Introduction 16-7
3.2 System Interface 16-7
3.2.1 ISA Bus Interface 16-7
3.3 Micro Channel Interface 16-9
3.4 BIOS Support Interface 16-9
3.5 Video Memory Interface 16-9
3.5.1 2 DRAM Implementation