(TXT) View Source
       
       # DTK COMPUTER, INC.
       
          TURBO 640
       
          Processor             8088-2                                   
          Processor Speed       8MHz                                     
          Chip Set              None                                     
          Max. Onboard DRAM     640K                                     
          Cache                 None                                     
          BIOS                  DTK/ERSO                                 
          Dimensions            330mm x 218mm                            
          I/O Options           None                                     
          NPU Options           8087-2                                   
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose               | Location | Purpose      | Location |
          |-----------------------+----------+--------------+----------|
          | Reset switch          |   JP1    | Turbo switch |   JP5    |
          |-----------------------+----------+--------------+----------|
          | Power LED & turbo LED |   JP2    | Keylock      |   JP8    |
          |-----------------------+----------+--------------+----------|
          | Speaker               |   JP4    |              |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |            Function             | Jumper/Switch | Position |
          |---------------------------------+---------------+----------|
          | » | Factory configured - do not | SW1/switch 1  |   Off    |
          |   | alter                       |               |          |
          |---+-----------------------------+---------------+----------|
          | » | NPU absent                  | SW1/switch 2  |   Off    |
          |---+-----------------------------+---------------+----------|
          |   | NPU present                 | SW1/switch 2  |    On    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |  Size   |   Bank 0   |   Bank 1   |   Bank 2   |  Bank 3   |
          |---------+------------+------------+------------+-----------|
          |  64KB   |  (9) 4164  |    NONE    |    NONE    |   NONE    |
          |---------+------------+------------+------------+-----------|
          |  128KB  |  (9) 4164  |  (9) 4164  |    NONE    |   NONE    |
          |---------+------------+------------+------------+-----------|
          |  192KB  |  (9) 4164  |  (9) 4164  |  (9) 4164  |   NONE    |
          |---------+------------+------------+------------+-----------|
          |  256KB  |  (9) 4164  |  (9) 4164  |  (9) 4164  | (9) 4164  |
          |---------+------------+------------+------------+-----------|
          |  256KB  | (9) 41256  |    NONE    |    NONE    |   NONE    |
          |---------+------------+------------+------------+-----------|
          |  512KB  | (9) 41256  | (9) 41256  |    NONE    |   NONE    |
          |---------+------------+------------+------------+-----------|
          |  576KB  | (9) 41256  | (9) 41256  |  (9) 4164  |   NONE    |
          |---------+------------+------------+------------+-----------|
          |  640KB  | (9) 41256  | (9) 41256  |  (9) 4164  | (9) 4164  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          |       Size       | JPA  | JPB  | JPC  | JPD  | JPE  | JPF  |
          |------------------+------+------+------+------+------+------|
          |       64KB       |Closed|Closed| Open | Open | Open |Closed|
          |------------------+------+------+------+------+------+------|
          |      128KB       |Closed|Closed| Open | Open | Open |Closed|
          |------------------+------+------+------+------+------+------|
          |      192KB       |Closed|Closed| Open | Open | Open |Closed|
          |------------------+------+------+------+------+------+------|
          |256KB (using 4164)|Closed|Closed| Open | Open | Open |Closed|
          |------------------+------+------+------+------+------+------|
          |   256KB (using   | Open | Open |Closed|Closed|Closed| Open |
          |      41256)      |      |      |      |      |      |      |
          |------------------+------+------+------+------+------+------|
          |      512KB       | Open | Open |Closed|Closed|Closed| Open |
          |------------------+------+------+------+------+------+------|
          |      576KB       | Open | Open |Closed|Closed|Closed| Open |
          |------------------+------+------+------+------+------+------|
          |      640KB       | Open | Open |Closed|Closed|Closed| Open |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |           Setting            |     JP6      |     JP7      |
          |------------------------------+--------------+--------------|
          | Switchable from turbo switch |    Closed    |     Open     |
          |------------------------------+--------------+--------------|
          |   Switchable from keyboard   |     Open     |    Closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 FLOPPY DRIVE CONFIGURATION                 |
          |------------------------------------------------------------|
          |  Drives installed  |       SW1/7       |       SW1/8       |
          |--------------------+-------------------+-------------------|
          |         1          |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |         2          |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |         3          |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |         4          |        Off        |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   MONITOR CONFIGURATION                    |
          |------------------------------------------------------------|
          |        Type        |       SW1/5       |       SW1/6       |
          |--------------------+-------------------+-------------------|
          |    EGA or none     |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |    40 x 25 CGA     |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |    80 x 25 CGA     |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |     Monochrome     |        Off        |        Off        |
          +------------------------------------------------------------+