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       # 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             
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        | Label |     Function      | Label |
          |------------------------+-------+-------------------+-------|
          | 15-pin analog video    |  CN1  | Feature connector |  CN2  |
          | port                   |       |                   |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 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  | JP12  | Pins 2&3 |
          |   | the 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,   | JP48  |  Closed  |
          |   | 12, 5E, 5F                          |       |          |
          |---+-------------------------------------+-------+----------|
          |   | Refresh setting - 72Hz in mode 3,   | JP48  |   Open   |
          |   | 12, 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     |
          +------------------------------------------------------------+