(TXT) View Source
       
       # JPN CORPORATION
       
          AT 286
       
                                                                         
          Processor             80286                                    
          Processor Speed       12/16/25MHz                              
          Chip Set              ACT                                      
          Max. Onboard DRAM     4MB                                      
          Cache                 None                                     
          BIOS                  AMI                                      
          Dimensions            305mm x 222mm                            
          I/O Options           None                                     
          NPU Options           80287                                    
                                                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |      Purpose      | Location |     Purpose      | Location |
          |-------------------+----------+------------------+----------|
          | Turbo LED         |   JP2    | External battery |   JP11   |
          |-------------------+----------+------------------+----------|
          | Power LED &       |   JP7    | Speaker          |   JP14   |
          | keylock           |          |                  |          |
          |-------------------+----------+------------------+----------|
          | Reset switch      |   JP10   | Turbo switch     |   JP19   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE JUMPERS                  |
          |------------------------------------------------------------|
          |           Function            | Jumper/Switch |  Position  |
          |-------------------------------+---------------+------------|
          | » | BIOS type select 27128    |      JP6      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | BIOS type select 27256    |      JP6      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Monitor type select color |      JP9      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Monitor type select       |      JP9      | pins 1 & 2 |
          |   | monochrome                |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Battery select internal   |     JP12      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Battery select external   |     JP12      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Power good signal detect  |     JP13      | pins 1 & 2 |
          |   | from power supply         |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Power good signal detect  |     JP13      | pins 2 & 3 |
          |   | from board                |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Bus speed select 8Mhz     |     JP17      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Bus speed select 6Mhz     |     JP17      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Parity check enabled      |     JP20      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Parity check disabled     |     JP20      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | DRAM speed select 1 wait  |     SW1/4     |     On     |
          |   | state                     |               |            |
          |---+---------------------------+---------------+------------|
          |   | DRAM speed select 0 wait  |     SW1/4     |    Off     |
          |   | states                    |               |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  | Bank 0 |  Parity  | Bank 1 | Parity | Bank  | Bank |
          |       |        |  (P-0)   |        | (P-1)  |   2   |  3   |
          |-------+--------+----------+--------+--------+-------+------|
          | 512KB |  (4)   |   (2)    |  NONE  |  NONE  | NONE  | NONE |
          |       | 44256  |  41256   |        |        |       |      |
          |-------+--------+----------+--------+--------+-------+------|
          | 512KB |  NONE  |   NONE   |  NONE  |  NONE  |  (2)  | NONE |
          |       |        |          |        |        | 256K  |      |
          |       |        |          |        |        |  x 9  |      |
          |-------+--------+----------+--------+--------+-------+------|
          | 640KB |  (4)   |   (2)    |  (4)   |  (2)   | NONE  | NONE |
          |       | 44256  |  41256   |  4464  |  4164  |       |      |
          |-------+--------+----------+--------+--------+-------+------|
          | 640KB |  NONE  |   NONE   |  (4)   |  (2)   |  (2)  | NONE |
          |       |        |          |  4464  |  4164  | 256K  |      |
          |       |        |          |        |        |  x 9  |      |
          |-------+--------+----------+--------+--------+-------+------|
          |  1MB  |  (4)   |   (2)    |  (4)   |  (2)   | NONE  | NONE |
          |       | 44256  |  41256   | 44256  | 41256  |       |      |
          |-------+--------+----------+--------+--------+-------+------|
          |  1MB  |  (4)   |   (2)    |  NONE  |  NONE  | NONE  | (2)  |
          |       | 44256  |  41256   |        |        |       | 256K |
          |       |        |          |        |        |       | x 9  |
          |-------+--------+----------+--------+--------+-------+------|
          |  1MB  |  NONE  |   NONE   |  NONE  |  NONE  |  (2)  | (2)  |
          |       |        |          |        |        | 256K  | 256K |
          |       |        |          |        |        |  x 9  | x 9  |
          |-------+--------+----------+--------+--------+-------+------|
          |  2MB  |  NONE  |   NONE   |  NONE  |  NONE  |  (2)  | NONE |
          |       |        |          |        |        | 1M x  |      |
          |       |        |          |        |        |   9   |      |
          |-------+--------+----------+--------+--------+-------+------|
          |  4MB  |  NONE  |   NONE   |  NONE  |  NONE  |  (2)  | (2)  |
          |       |        |          |        |        | 1M x  | 1M x |
          |       |        |          |        |        |   9   |  9   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM SWITCH CONFIGURATION                  |
          |------------------------------------------------------------|
          |     Size      |    SW1/1     |    SW1/2     |    SW1/3     |
          |---------------+--------------+--------------+--------------|
          |     512KB     |      On      |      On      |      On      |
          |---------------+--------------+--------------+--------------|
          |     640KB     |      On      |     Off      |     Off      |
          |---------------+--------------+--------------+--------------|
          |      1MB      |      On      |     Off      |      On      |
          |---------------+--------------+--------------+--------------|
          |      2MB      |     Off      |      On      |      On      |
          |---------------+--------------+--------------+--------------|
          |      4MB      |     Off      |     Off      |      On      |
          +------------------------------------------------------------+