DTK COMPUTER, INC.
==================

   PTM-1630

   Processor         80286 (exact location unknown)               
   Processor Speed   16MHz                                        
   Chip Set          Unidentified                                 
   Max. Onboard DRAM 1MB                                          
   Cache             None                                         
   BIOS              DTK                                          
   Dimensions        330mm x 218mm                                
   I/O Options       Local memory slot                            
   NPU Options       80287                                        

<gopher://bitreich.org/I/th99/m/C-D/33078-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Local memory slot |   CN1    | Turbo LED        |    J5    |
   |-------------------+----------+------------------+----------|
   | Reset switch      |    J1    | Power LED &      |    J6    |
   |                   |          | keylock          |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |    J2    | Turbo switch     |   W11    |
   |-------------------+----------+------------------+----------|
   | External battery  |    J3    |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |   | Local memory wait state select 0 |   W3   |   Closed   |
   |   | wait states                      |        |            |
   |---+----------------------------------+--------+------------|
   |   | Local memory wait state select 1 |   W3   |    Open    |
   |   | wait state                       |        |            |
   |---+----------------------------------+--------+------------|
   |   | BIOS wait state select 2 wait    |   W4   |    Open    |
   |   | states                           |        |            |
   |---+----------------------------------+--------+------------|
   |   | BIOS wait state select 1 wait    |   W4   |   Closed   |
   |   | state                            |        |            |
   |---+----------------------------------+--------+------------|
   |   | BIOS type select 27128           |   W8   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | BIOS type select 27256           |   W8   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Battery type select internal     |   W9   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | Battery type select external     |   W9   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  W10   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select color        |  W10   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size  |   Bank 0   |   Bank 1   |   Bank 2   |   Bank 3   |
   |--------+------------+------------+------------+------------|
   | 512KB  | (9) 41256  | (9) 41256  |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   | 640KB  | (9) 41256  | (9) 41256  |  (9) 4164  |  (9) 4164  |
   |--------+------------+------------+------------+------------|
   |  1MB   | (9) 41256  | (9) 41256  | (9) 41256  | (9) 41256  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |       Size        |         W6         |        W7         |
   |-------------------+--------------------+-------------------|
   |       512KB       |       Closed       |      Closed       |
   |-------------------+--------------------+-------------------|
   |       640KB       |       Closed       |       Open        |
   |-------------------+--------------------+-------------------|
   |        1MB        |        Open        |      Closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  DRAM SPEED CONFIGURATION                  |
   |------------------------------------------------------------|
   | DRAM speed |   Speed    |                W5                |
   |------------+------------+----------------------------------|
   |   120ns    | 16MHz/0 ws |               Open               |
   |------------+------------+----------------------------------|
   |   100ns    | 12MHz/0 ws | pins 1 & 2, 3 & 4, 5 & 6 closed  |
   |------------+------------+----------------------------------|
   |    80ns    | 16MHz/1 ws | pins 1 & 2, 3 & 4, 5 & 6, 7 & 8  |
   |            |            |              closed              |
   |------------+------------+----------------------------------|
   |    60ns    | 12MHz/1 ws | pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, |
   |            |            |          9 & 10 closed           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  NPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |      Speed       |         W1         |         W2         |
   |------------------+--------------------+--------------------|
   |       6MHz       | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |       8MHz       | pins 1 & 2 closed  | pins 3 & 4 closed  |
   |------------------+--------------------+--------------------|
   |      10MHz       | pins 2 & 3 closed  | pins 5 & 6 closed  |
   +------------------------------------------------------------+