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       # WESTERN DIGITAL CORPORATION
       
          WD1003S-WA4
       
          +------------------------------------------------------------+
          +------------------------------------------------------------+
       
          Data bus: 16-bit, ISA
       
          Size: Full-length, half-height card
       
          Hard drives supported:  Two ST506/412 MFM drives
       
          Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB
          drives
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |                   Function                   |  Location   |
          |----------------------------------------------+-------------|
          | 34-pin control cable connector-hard drive    |     CN1     |
          |----------------------------------------------+-------------|
          | 20-pin data cable connector-drive 0          |     CN2     |
          |----------------------------------------------+-------------|
          | 20-pin data cable connector-drive 1          |     CN3     |
          |----------------------------------------------+-------------|
          | 34-pin data cable connector-floppy drive     |     CN4     |
          |----------------------------------------------+-------------|
          | 4-pin connector-drive active LED             |     CN5     |
          |----------------------------------------------+-------------|
          | DB-9 serial port 1 connector-external        |     CN6     |
          |----------------------------------------------+-------------|
          | DB-25 parallel port connector-external       |     CN7     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE JUMPERS                  |
          |------------------------------------------------------------|
          |            Function            |   Location   |  Setting   |
          |--------------------------------+--------------+------------|
          | » | Floppy drive port address  |     JP1      | pins 3 & 4 |
          |   | is 3F0-3F7h                |              |   closed   |
          |---+----------------------------+--------------+------------|
          |   | Floppy drive disabled      |     JP1      | pins 2 & 3 |
          |   |                            |              |   closed   |
          |---+----------------------------+--------------+------------|
          |   | Floppy drive port address  |     JP1      | pins 1 & 2 |
          |   | is 370-377h                |              |   closed   |
          |---+----------------------------+--------------+------------|
          | » | Hard drive port address is |     JP2      | pins 2 & 3 |
          |   | 1F0-1F7h                   |              |   closed   |
          |---+----------------------------+--------------+------------|
          |   | Hard drive port address is |     JP2      | pins 2 & 3 |
          |   | 170-177h                   |              |   closed   |
          |---+----------------------------+--------------+------------|
          | » | Parallel port is set for   | JP3 and JP3A | pins 1 & 2 |
          |   | LPT1                       |              |   closed   |
          |---+----------------------------+--------------+------------|
          |   | Parallel port disabled     | JP3 and JP3A | pins 2 & 3 |
          |   |                            |              |   closed   |
          |---+----------------------------+--------------+------------|
          |   | Parallel port is set for   | JP3 and JP3A | pins 3 & 4 |
          |   | LPT2                       |              |   closed   |
          |---+----------------------------+--------------+------------|
          | » | Serial port is set for     | JP4 and JP4A | pins 1 & 2 |
          |   | COM1                       |              |   closed   |
          |---+----------------------------+--------------+------------|
          |   | Serial port is disabled    | JP4 and JP4A | pins 2 & 3 |
          |   |                            |              |   closed   |
          |---+----------------------------+--------------+------------|
          |   | Serial port is set for     | JP4 and JP4A | pins 3 & 4 |
          |   | COM2                       |              |   closed   |
          +------------------------------------------------------------+