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       # WESTERN DIGITAL CORPORATION
       
          WD386SX-LPX
       
          Processor        80386SX                                       
          Processor Speed  16/20MHz                                      
          Chip Set         WD                                            
          Max. Onboard     32MB                                          
          DRAM             
          Cache            None                                          
          BIOS             AMI/Award                                     
          Dimensions       330mm x 218mm                                 
          I/O Options      Parallel port, serial port (2), floppy drive  
                           interface, IDE interface, VGA port, bus mouse 
                           port, IBM video interface, proprietary bus    
                           expansion slot                                
          NPU Options      80387SX                                       
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | Proprietary bus  |    J1    | Parallel port     |   J10    |
          | expansion card   |          |                   |          |
          |------------------+----------+-------------------+----------|
          | Mouse port       |    J4    | IBM video         |   J11    |
          |                  |          | interface         |          |
          |------------------+----------+-------------------+----------|
          | Reset switch     |    J6    | VGA port          |   J12    |
          |------------------+----------+-------------------+----------|
          | Floppy drive     |    J7    | IDE interface     |   J14    |
          | interface        |          |                   |          |
          |------------------+----------+-------------------+----------|
          | Serial port 2    |    J8    | Keyswitch/IDE     |   J15    |
          |                  |          | interface LED     |          |
          |------------------+----------+-------------------+----------|
          | Serial port 1    |    J9    | External speaker  |   J17    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | CMOS memory normal operation     |   W1   |    Open    |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |   W1   |   Closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |   W2   |    Open    |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |   W3   |   Closed   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Mouse interrupt enabled IRQ12    |   W4   |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | Mouse interrupt disabled IRQ12   |   W4   |    Open    |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select color        |   W5   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select monochrome   |   W5   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | VGA clock select internal        |   W6   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VGA clock select external        |   W6   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | VGA port enabled                 |   W7   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VGA port disabled                |   W7   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select multisync    |   W8   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select fixed        |   W8   | pins 1 & 2 |
          |   | frequency                        |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select AT           |   W9   | pins 2 & 3 |
          |   | compatible                       |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select PS/2         |   W9   | pins 1 & 2 |
          |   | compatible                       |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Speaker select internal          |  W10   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Speaker select external          |  W10   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | IDE interface LED enabled        |  W11   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | IDE interface LED disabled       |  W11   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
          |-------+-------------+------------+------------+------------|
          |  1MB  | (2) 256K x  | (2) 256K x |    NONE    |    NONE    |
          |       |      9      |     9      |            |            |
          |-------+-------------+------------+------------+------------|
          |  2MB  | (2) 256K x  | (2) 256K x | (2) 256K x | (2) 256K x |
          |       |      9      |     9      |     9      |     9      |
          |-------+-------------+------------+------------+------------|
          | 2.5MB | (2) 256K x  | (2) 1M x 9 |    NONE    |    NONE    |
          |       |      9      |            |            |            |
          |-------+-------------+------------+------------+------------|
          |  4MB  | (2) 1M x 9  | (2) 1M x 9 |    NONE    |    NONE    |
          |-------+-------------+------------+------------+------------|
          |  5MB  | (2) 256K x  | (2) 256K x | (2) 1M x 9 | (2) 1M x 9 |
          |       |      9      |     9      |            |            |
          |-------+-------------+------------+------------+------------|
          |  8MB  | (2) 1M x 9  | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
          +------------------------------------------------------------+