UNIDENTIFIED

WD90C30

Category                     Video
Video Types Supported        XVGA
Video Processor              Western Digital 90
Highest Resolution Supported 1024 x 768
Data Bus Type                16-bit ISA
Memory Type                  DRAM
Maximum Onboard Memory       1MB

[Image]

                                CONNECTIONS

       Purpose          Location            Purpose            Location

  15-pin analog            CN1        VGA feature connector       CN2
  video port

       DISPLAY MEMORY CONFIGURATION

       Memory                JP1

         1MB          Pins 1 & 2 closed

        512KB         Pins 2 & 3 closed

                       ZERO WAIT STATE CONFIGURATION

                Setting                                 JP2

  »                Enabled                       Pins 2 & 3 closed

                  Disabled                       Pins 1 & 2 closed

         MONITOR VERTICAL RETRACE TIMING CONFIGURATION (800 X 600)

          Setting                   SW1/1                   SW1/2

  »           56Hz                   Off                     Off

              60Hz                   Off                     On

              72Hz                    On                     Off

  Note: 72Hz requires 1MB of DRAM memory.

     MONITOR VERTICAL RETRACE TIMING CONFIGURATION (1024 X 768)

        Setting                SW1/3                  SW1/4

      Interlaced                Off                    Off

  60Hz non-interlaced           Off                     On

  70Hz non-interlaced            On                    Off

  Note: 70Hz requires 1MB of DRAM memory.

                     VERTICAL SCAN RATE CONFIGURATION

                  Rate                                 SW1/5

  »                31.5KHz                              Off

                    40KHz                               On

                         VGA MONITOR CONFIGURATION

                Setting                          SW1/6 (Optional)

  »                Color                               Off

                 Monochrome                             On

  Note: SW1/6 location is unidentified and may be present on other
  revisions of this board.

              DRAM CONFIGURATION

     Memory         Bank 0          Bank 1

     512KB        (4) 256K x 4       None

      1MB         (4) 256K x 4   (4) 256K x 4