WD90C00

WD90COO Section Title TABLE OF CONTENTS Page 1.0 Introduction ........................................................... 12-1 1.1 Features ........................................................ 12-1 1.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12-2 2.0 Architecture ........................................................... 12-4 3.0 WD90COO Interfaces .................................................... 12-6 3.1 CPU and BIOS ROM Interface ....................................... 12-6 3.2 DRAM Display Buffer Interface ....................................... 12-6 3.3 Video and RAMDAC Interface ........................................ 12-7 3.4 Clocklnterface .................................................... 12-7 3.5 WD90COO Power-Up Configuration ................................... 12-7 4.0 Pin Description ......................................................... 12-8 5.0 Absolute Maximum Ratings .............................................. 12-16 6.0 Standard Test Conditions ............................................... 12-17 7.0 DC Characteristics ..................................................... 12-18 8.0 AC Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-19 9.0 WD90COO Registers ................................................... 12-31 9.1 VGA Registers Summary .......................................... 12-31 9...