(TXT) View Source
       
       # 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                               
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Purpose         | Location |   Purpose   | Location |
          |------------------------+----------+-------------+----------|
          | 15-pin analog video    |   CN1    | VGA feature |   CN2    |
          | port                   |          | connector   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                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    |
          +------------------------------------------------------------+