(TXT) View Source
       
       # UNIDENTIFIED
       
          286 MAIN BOARD (DIP VERSION)
       
          Processor             80286                                    
          Processor Speed       12MHz                                    
          Chip Set              Unknown                                  
          Max. Onboard DRAM     4MB                                      
          Cache                 None                                     
          BIOS                  Award                                    
          Dimensions            330mm x 218mm                            
          I/O Options           None                                     
          NPU Options           80287                                    
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose             | Location | Purpose        | Location |
          |---------------------+----------+----------------+----------|
          | Power LED & keylock |    J1    | Turbo switch   |    J4    |
          |---------------------+----------+----------------+----------|
          | Speaker             |    J2    | Turbo LED      |    J5    |
          |---------------------+----------+----------------+----------|
          | Reset switch        |    J3    |                |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |   | Function                         | Jumper |  Position  |
          |---+----------------------------------+--------+------------|
          |   | BIOS type select 27128           |  JP1   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | BIOS type select 27256           |  JP1   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select color        |  JP2   |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select monochrome   |  JP2   |    Open    |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - DRAM access |  JP5   | pins 2 & 3 |
          |   | speed 12MHz                      |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Invalid setting                  |  JP5   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | NPU speed select ³ 8MHz          |  JP13  | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | NPU speed select £ 6MHz          |  JP13  | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Bus speed select fast            |  JP15  |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | Bus speed select slow            |  JP15  |    Open    |
          |---+----------------------------------+--------+------------|
          | » | Early address latch enabled      |  JP16  |    Open    |
          |---+----------------------------------+--------+------------|
          |   | Early address latch disabled     |  JP16  |   Closed   |
          |---+----------------------------------+--------+------------|
          | » | DRAM select 0 wait states        |  JP17  |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | DRAM select 1 wait state         |  JP17  |    Open    |
          |---+----------------------------------+--------+------------|
          | » | Parity check enabled             |  JP44  |    Open    |
          |---+----------------------------------+--------+------------|
          |   | Parity check disabled            |  JP44  |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | Notes: Location of pin 1s        |        |            |
          |   | unverified. Location of JP44     |        |            |
          |   | unverified                       |        |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  |Bank 0 |Bank |Bank 2|Bank|Bank |  P0  |  P1  | JP4  |
          |       |       |  1  |      | 3  |  4  |      |      |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          | 512KB | (16)  |NONE | NONE |NONE|NONE | (2)  | NONE |closed|
          |       | 41256 |     |      |    |     |41256 |      |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          | 512KB | NONE  | (4) | NONE |NONE|NONE | (2)  | NONE |closed|
          |       |       |44256|      |    |     |41256 |      |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          | 640KB | (16)  | (4) | NONE |NONE|NONE | (2)  | (2)  |closed|
          |       | 41256 |4464 |      |    |     |41256 | 4164 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          | 640KB | NONE  | (4) | NONE |(4) |NONE | (2)  | (2)  |closed|
          |       |       |44256|      |4464|     |41256 | 4164 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          | 640KB | (16)  |NONE | (16) |NONE|NONE | (2)  | (2)  |closed|
          |       | 41256 |     | 4164 |    |     |41256 | 4164 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          | 640KB | NONE  | (4) | (16) |NONE|NONE | (2)  | (2)  |closed|
          |       |       |44256| 4164 |    |     |41256 | 4164 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          |  1MB  | (16)  |NONE | (16) |NONE|NONE | (2)  | (2)  |closed|
          |       | 41256 |     |41256 |    |     |41256 |41256 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          |  1MB  | NONE  | (4) | NONE |NONE| (4) | (2)  | (2)  |closed|
          |       |       |44256|      |    |44256|41256 |41256 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          |  1MB  | (16)  |NONE | NONE |NONE| (4) | (2)  | (2)  |closed|
          |       | 41256 |     |      |    |44256|41256 |41256 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          |  1MB  | NONE  | (4) | (16) |NONE|NONE | (2)  | (2)  |closed|
          |       |       |44256|41256 |    |     |41256 |41256 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          |  2MB  | (16)  |NONE | NONE |NONE|NONE | (2)  | NONE | open |
          |       |411000 |     |      |    |     |411000|      |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          |2.128MB| (16)  |NONE | (16) |NONE|NONE | (2)  | (2)  | open |
          |       |411000 |     | 4164 |    |     |411000| 4164 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          | 2.5MB | (16)  |NONE | (16) |NONE|NONE | (2)  | (2)  | open |
          |       |411000 |     |41256 |    |     |411000|41256 |      |
          |-------+-------+-----+------+----+-----+------+------+------|
          |  4MB  | (16)  |NONE | (16) |NONE|NONE | (2)  | (2)  | open |
          |       |411000 |     |411000|    |     |411000|411000|      |
          +------------------------------------------------------------+