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       # WESTERN DIGITAL CORPORATION
       
          WD1003V-SM1, WD1003V-SM2
       
          Chipset       Western Digital                                  
          Data Bus      16-bit ISA                                       
          Card Size     Full height, three-quarters length               
          Hard Drives   Two ST506/412(MFM) devices                       
          Supported     
          Floppy Drives Two 360KB, 720KB, 1.2MB, or 1.44MB drives        
          Supported     (WD1003V-SM2 only)                               
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Function       | Label |      Function       | Label |
          |----------------------+-------+---------------------+-------|
          | 34-pin cable         |  J1   | 34-pin control      |  J5   |
          | connector - floppy   |       | cable connector -   |       |
          | drive                |       | hard drive          |       |
          |----------------------+-------+---------------------+-------|
          | 20-pin data cable    |  J3   | 4-pin drive active  |  J6   |
          | connector - drive 2  |       | LED                 |       |
          |----------------------+-------+---------------------+-------|
          | 20-pin data cable    |  J4   |                     |       |
          | connector - drive 1  |       |                     |       |
          |------------------------------------------------------------|
          |      Note:J1 is not present on WD1003V-SM1 cards.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                 Setting                 | Label | Position |
          |-----------------------------------------+-------+----------|
          | » | Hard drives in latched mode         | W1/A  |   Open   |
          |---+-------------------------------------+-------+----------|
          |   | Hard drives in non-latched mode     | W1/A  |  Closed  |
          |---+-------------------------------------+-------+----------|
          | » | Factory configured - do not alter   | W1/B  |   Open   |
          |---+-------------------------------------+-------+----------|
          | » | Hard drive caching enabled          | W1/C  |   Open   |
          |---+-------------------------------------+-------+----------|
          |   | Hard drive caching disabled         | W1/C  |  Closed  |
          |---+-------------------------------------+-------+----------|
          | » | Factory configured - do not alter   |  W2   |   Open   |
          |---+-------------------------------------+-------+----------|
          | » | Hard drive interface uses primary   |  W3   |   Open   |
          |   | I/O address                         |       |          |
          |---+-------------------------------------+-------+----------|
          |   | Hard drive interface uses secondary |  W3   |  Closed  |
          |   | I/O address                         |       |          |
          |---+-------------------------------------+-------+----------|
          | » | Floppy drive interface uses primary |  W4   |   Open   |
          |   | I/O address                         |       |          |
          |---+-------------------------------------+-------+----------|
          |   | Floppy drive interface uses         |  W4   |  Closed  |
          |   | secondary I/O address               |       |          |
          |---+-------------------------------------+-------+----------|
          | » | Single speed floppy drives attached |  W5   |   Open   |
          |   | to card                             |       |          |
          |---+-------------------------------------+-------+----------|
          |   | Dual speed floppy drives attached   |  W5   |  Closed  |
          |   | to card                             |       |          |
          |---+-------------------------------------+-------+----------|
          | » | Signal ground not connected to      |  W6   |   Open   |
          |   | chassis ground                      |       |          |
          |---+-------------------------------------+-------+----------|
          |   | Signal ground connected to chassis  |  W6   |  Closed  |
          |   | ground                              |       |          |
          +------------------------------------------------------------+