(TXT) View Source
       
       # PEAKTRON COMPUTER, INC.
       
          486DX-25/33, 486SX-20
       
          Processor             80486SX/80486DX                          
          Processor Speed       20/25/33MHz                              
          Chip Set              Peaktron                                 
          Max. Onboard DRAM     32MB                                     
          Cache                 None                                     
          BIOS                  AMI                                      
          Dimensions            330mm x 218mm                            
          I/O Options           None                                     
          NPU Options           None                                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose        | Location | Purpose             | Location |
          |----------------+----------+---------------------+----------|
          | Reset switch   |    J1    | Speaker             |    J4    |
          |----------------+----------+---------------------+----------|
          | Turbo switch   |    J2    | Power LED & Keylock |    J5    |
          |----------------+----------+---------------------+----------|
          | Turbo LED      |    J3    | External battery    |   JP4    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |           Function            | Jumper/Switch |  Position  |
          |-------------------------------+---------------+------------|
          | » | Parity check enabled      |      J6       |   Closed   |
          |---+---------------------------+---------------+------------|
          |   | Parity check disabled     |      J6       |    Open    |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |      J8       |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Monitor type select       |      J10      |    Open    |
          |   | monochrome                |               |            |
          |---+---------------------------+---------------+------------|
          |   | Monitor type select color |      J10      |   Closed   |
          |---+---------------------------+---------------+------------|
          | » | CPU speed select          |      JP1      | pins 1 & 2 |
          |   | switchable at turbo       |               |   closed   |
          |   | switch                    |               |            |
          |---+---------------------------+---------------+------------|
          |   | CPU speed select forced   |      JP1      | pins 2 & 3 |
          |   | fast                      |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | CPU speed select forced   |      JP1      |    Open    |
          |   | slow                      |               |            |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |      JP5      |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | 20/25MHz CPU using 70ns   |      JP6      |    Open    |
          |   | DRAM or33MHz CPU using    |               |            |
          |   | 60ns                      |               |            |
          |---+---------------------------+---------------+------------|
          |   | 20/25MHz CPU using 60ns   |      JP6      |   Closed   |
          |   | DRAM                      |               |            |
          |---+---------------------------+---------------+------------|
          | » | Shadow BIOS disabled      |     SW1/5     |   Closed   |
          |---+---------------------------+---------------+------------|
          |   | Shadow BIOS enabled       |     SW1/5     |    Open    |
          |---+---------------------------+---------------+------------|
          | » | Bus speed select ATCLK/3  |     SW1/6     |    Open    |
          |---+---------------------------+---------------+------------|
          |   | Bus speed select ATCLK/4  |     SW1/6     |   Closed   |
          |------------------------------------------------------------|
          | Note:Location of JP6 is unverified. If using 8 bit SIMMs,  |
          | J6 must be open.                                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       1MB        |    (4) 256K x 9    |        NONE        |
          |------------------+--------------------+--------------------|
          |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       4MB        |     (4) 1M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          | Size |    SW1/1    |    SW1/2    |   SW1/3    |   SW1/4    |
          |------+-------------+-------------+------------+------------|
          | 1MB  |   Closed    |    Open     |    Open    |   Closed   |
          |------+-------------+-------------+------------+------------|
          | 2MB  |    Open     |    Open     |    Open    |   Closed   |
          |------+-------------+-------------+------------+------------|
          | 4MB  |   Closed    |   Closed    |    Open    |    Open    |
          |------+-------------+-------------+------------+------------|
          | 5MB  |    Open     |   Closed    |    Open    |   Closed   |
          |------+-------------+-------------+------------+------------|
          | 8MB  |    Open     |   Closed    |    Open    |    Open    |
          |------+-------------+-------------+------------+------------|
          | 16MB |   Closed    |    Open     |    Open    |    Open    |
          |------+-------------+-------------+------------+------------|
          | 20MB |    Open     |    Open     |   Closed   |    Open    |
          |------+-------------+-------------+------------+------------|
          | 32MB |    Open     |    Open     |    Open    |    Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |  Type   |           JP2            |          JP3          |
          |---------+--------------------------+-----------------------|
          | 80486SX |    pins 2 & 3 closed     |         Open          |
          |---------+--------------------------+-----------------------|
          | 80486DX |    pins 1 & 2 closed     |        Closed         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     BIOS CONFIGURATION                     |
          |------------------------------------------------------------|
          |  Type   |          J7           |            J9            |
          |---------+-----------------------+--------------------------|
          |  27256  |         Open          |    pins 1 & 2 closed     |
          |---------+-----------------------+--------------------------|
          |  27512  |        Closed         |    pins 2 & 3 closed     |
          +------------------------------------------------------------+