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       # LEADING TECHNOLOGY
       
          6500SX
       
          Processor    80386SX (exact location unknown)                  
          Processor    16/20/25MHz                                       
          Speed        
          Chip Set     SIS                                               
          Max. Onboard 4MB                                               
          DRAM         
          Cache        None                                              
          BIOS         AMI                                               
          Dimensions   254mm x 220mm                                     
          I/O Options  Floppy drive interface, IDE interface, Game port, 
                       parallel port, serial ports (2)                   
          NPU Options  80387SX                                           
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | Parallel port     |   CN1    | IDE interface    |   J10    |
          |-------------------+----------+------------------+----------|
          | Joystick port     |   CN2    | Floppy drive     |   J12    |
          |                   |          | interface        |          |
          |-------------------+----------+------------------+----------|
          | Serial port 2     |   CN3    | Speaker          |   J15    |
          |-------------------+----------+------------------+----------|
          | Serial port 1     |   CN4    | IDE interface    |   J32    |
          |                   |          | LED              |          |
          |-------------------+----------+------------------+----------|
          | Front panel       |    J4    | Riser Card       |    S1    |
          | connector         |          |                  |          |
          |-------------------+----------+------------------+----------|
          | External battery  |    J9    |                  |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |           Function            | Jumper/Switch |  Position  |
          |-------------------------------+---------------+------------|
          | » | Joystick port enabled     |      J17      |   Closed   |
          |---+---------------------------+---------------+------------|
          |   | Joystick port disabled    |      J17      |    Open    |
          |---+---------------------------+---------------+------------|
          | » | Floppy drive interface    |      J28      |    Open    |
          |   | enabled                   |               |            |
          |---+---------------------------+---------------+------------|
          |   | Floppy drive interface    |      J28      |   Closed   |
          |   | disabled                  |               |            |
          |---+---------------------------+---------------+------------|
          | » | IDE interface enabled     |      J29      |   Closed   |
          |---+---------------------------+---------------+------------|
          |   | IDE interface disabled    |      J29      |    Open    |
          |---+---------------------------+---------------+------------|
          | » | Parity enabled            |      J33      |   Closed   |
          |---+---------------------------+---------------+------------|
          |   | Parity disabled           |      J33      |    Open    |
          |---+---------------------------+---------------+------------|
          | » | NPU disabled              |      J40      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | NPU enabled               |      J40      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |     SW2/5     |    Off     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |     SW2/6     |     On     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |     SW2/7     |    Off     |
          |   | not alter                 |               |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
          |------------+---------------+---------------+---------------|
          |    1MB     |   (8) 44256   |     NONE      |     NONE      |
          |------------+---------------+---------------+---------------|
          |   1.5MB    |   (8) 44256   | (2) 256K x 9  |     NONE      |
          |------------+---------------+---------------+---------------|
          |    2MB     |   (8) 44256   | (2) 256K x 9  | (2) 256K x 9  |
          |------------+---------------+---------------+---------------|
          |    2MB     |     NONE      |  (2) 1M x 9   |     NONE      |
          |------------+---------------+---------------+---------------|
          |    4MB     |     NONE      |  (2) 1M x 9   |  (2) 1M x 9   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM SWITCH CONFIGURATION                  |
          |------------------------------------------------------------|
          | Size  | SW2/1 | SW2/2 | SW2/3 |SW2/4 |SW2/8 |SW2/9 |SW2/10 |
          |-------+-------+-------+-------+------+------+------+-------|
          |  1MB  |  On   |  On   |  On   |  On  |  On  |  On  |  Off  |
          |-------+-------+-------+-------+------+------+------+-------|
          | 1.5MB |  On   |  On   |  On   |  On  |  On  | Off  |  On   |
          |-------+-------+-------+-------+------+------+------+-------|
          |  2MB  |  On   |  On   |  On   |  On  |  On  | Off  |  Off  |
          |-------+-------+-------+-------+------+------+------+-------|
          |  2MB  |  On   |  Off  |  Off  |  On  |  On  |  On  |  On   |
          |-------+-------+-------+-------+------+------+------+-------|
          |  4MB  |  On   |  Off  |  Off  | Off  |  On  |  On  |  Off  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SERIAL PORT CONFIGURATION                  |
          |------------------------------------------------------------|
          |  Port 1 (CN4)  |  Port 2   |  J20  |  J22  |  J25  |  J26  |
          |                |   (CN2)   |       |       |       |       |
          |----------------+-----------+-------+-------+-------+-------|
          | »    |  COM1   |   COM2    | 2 & 3 | 1 & 2 | Open  | Open  |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM1   |   COM3    | 2 & 3 | Open  | 1 & 2 | Open  |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM1   |   COM4    | 2 & 3 | Open  | Open  | 1 & 2 |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM2   |   COM1    | 1 & 2 | 2 & 3 | Open  | Open  |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM2   |   COM3    | Open  | 2 & 3 | 1 & 2 | Open  |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM2   |   COM4    | Open  | 2 & 3 | Open  | 1 & 2 |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM3   |   COM1    | 1 & 2 | Open  | 2 & 3 | Open  |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM3   |   COM2    | Open  | 1 & 2 | 2 & 3 | Open  |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM3   |   COM4    | Open  | Open  | 2 & 3 | 1 & 2 |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM4   |   COM1    | 2 & 3 | Open  | Open  | 1 & 2 |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM4   |   COM2    | Open  | 1 & 2 | Open  | 2 & 3 |
          |------+---------+-----------+-------+-------+-------+-------|
          |      |  COM4   |   COM3    | Open  | Open  | 1 & 2 | 2 & 3 |
          |------------------------------------------------------------|
          | Note:Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               SERIAL PORT IRQ CONFIGURATION                |
          |------------------------------------------------------------|
          |   Port 1   | Port 2 (CN2) |        J18        |    J19     |
          |   (CN1)    |              |                   |            |
          |------------+--------------+-------------------+------------|
          | »  | IRQ4  |     IRQ3     | pins 2 & 3 closed | pins 1 & 2 |
          |    |       |              |                   |   closed   |
          |----+-------+--------------+-------------------+------------|
          |    | IRQ3  |     IRQ4     | pins 1 & 2 closed | pins 2 & 3 |
          |    |       |              |                   |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                PARALLEL PORT CONFIGURATION                 |
          |------------------------------------------------------------|
          |    LPT    |  IRQ   |        J16        |        J21        |
          |-----------+--------+-------------------+-------------------|
          | » |   1   |   7    | pins 2 & 3 closed | pins 2 & 3 closed |
          |---+-------+--------+-------------------+-------------------|
          |   |   1   |   5    | pins 2 & 3 closed | pins 1 & 2 closed |
          |---+-------+--------+-------------------+-------------------|
          |   |   2   |   7    | pins 1 & 2 closed | pins 2 & 3 closed |
          |---+-------+--------+-------------------+-------------------|
          |   |   2   |   5    | pins 1 & 2 closed | pins 1 & 2 closed |
          +------------------------------------------------------------+