UNIDENTIFIED

WD90C31 LOCAL BUS ACCELERATOR

Category                    Video
Video Types Supported       XVGA
Video Processor             WD90C31
Highest Resolution          1280 X 1024
Supported
Data Bus Type               VESA local bus
Memory Type                 DRAM
Maximum Onboard Memory      1024KB

[Image]

                                CONNECTIONS

       Purpose          Location            Purpose            Location

  15-pin analog            J1         VGA feature connector       J2
  video port

                           DELAY CYCLE SELECTION

            Delay                      JP1                    JP2

         1 clock cycle          Pins 1 & 2 closed            Open
        (486/Pentium)

     2 clock cycles (386)       Pins 2 & 3 closed           Closed

  800 X 600 REFRESH RATE SELECTION

  Refresh      SW1/1        SW1/2

   56.5Hz       Off          Off

   72.1Hz        On          Off

   60.5Hz       Off          On

   56.5Hz        On          On

                   1024 X 768 REFRESH RATE SELECTION

     Refresh            Mode              SW1/3            SW1/4

      86.7Hz         Interlaced            Off              Off

      70.2Hz       Non-Interlaced          On               Off

      60.2Hz       Non-Interlaced          Off               On

      72.3Hz       Non-Interlaced          On                On

  HORIZONTAL REFRESH RATE SELECTION

      Refresh             SW1/5

     31.5 KHz              Off

      40 KHz               On