
WESTERN DIGITAL CORPORATION

WD90C33

Card Type                    Video card
Video Chip Set               Western Digital
Maximum Video Memory         2MB DRAM
Video Types Supported        VGA
Highest Resolution Supported 1280 x 1024
Data Bus                     32-bit VESA Local Bus

[Image]

                                CONNECTIONS

          Function            Label            Function             Label

  15-pin analog video port    CN1     Feature connector             CN2

                        USER CONFIGURABLE SETTINGS

                   Function                      Label       Position

     80486 CPU                                  JP11        Pins 2&3

      80386 CPU                                  JP11        Pins 1&2

     Date or code status - disconnected         JP12        Pins 1&2
      from the VL bus

      Data or code status - connected to the     JP12        Pins 2&3
      VL bus

     VESA local bus                             JP45         Closed

      ISA bus                                    JP45          Open

     Configuration option                       JP46         Closed

     Local bus timing is 2 clocks               JP47         Closed

      Local bus timing is 4 clocks               JP47          Open

     Refresh setting - 60Hz in mode 3, 12,      JP48         Closed
      5E, 5F

      Refresh setting - 72Hz in mode 3, 12,      JP48          Open
      5E, 5F

       RESOLUTION AND REFRESH SETTINGS - 800 X 600, 16 OR 256 COLOR

                  Function                        JP41           JP42

     Vert: 56Hz, non-interlaced; Horiz:          Open           Open
      35.3-KHz

      Vert: 72Hz, non-interlaced; Horiz:         Closed          Open
      48.2+KHz

      Vert: 60Hz, non-interlaced; Horiz:          Open          Closed
      38.0+KHz

      Vert: 56Hz, non-interlaced; Horiz:         Closed         Closed
      35.3-KHz

               RESOLUTION AND REFRESH SETTINGS - 1024 X 768

                  Function                        JP43           JP44

     Vert: 86.7Hz, interlaced; Horiz:            Open           Open
      35.4+KHz

      Vert: 70Hz, non-interlaced; Horiz:         Closed          Open
      56.6-KHz

      Vert: 60Hz, non-interlaced; Horiz:          Open          Closed
      48.5-KHz

      Vert: 72Hz, non-interlaced; Horiz:         Closed         Closed
      59.7-KHz

    VIDEO MEMORY CONFIGURATION (DRAM)

  Size        Bank 0           Bank 1

   1MB    (8) 128KB x 8         None

   2MB    (8) 128KB x 8    (8) 128KB x 8

