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

   PEM-2561D (S)

   Processor    80386DX                                           
   Processor    25MHz                                             
   Speed        
   Chip Set     DTK/SIS                                           
   Max. Onboard 16MB                                              
   DRAM         
   Cache        None                                              
   BIOS         DTK                                               
   Dimensions   330mm x 218mm                                     
   I/O Options  Parallel port, serial ports (2), floppy drive     
                interface, IDE interface                          
   NPU Options  80387/3167                                        

<gopher://bitreich.org/I/th99/m/C-D/30368-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Power LED &       |    J1    | Floppy drive     |    J7    |
   | keylock           |          | interface        |          |
   |-------------------+----------+------------------+----------|
   | IDE interface LED |    J2    | Serial port 1    |    J9    |
   |-------------------+----------+------------------+----------|
   | Turbo LED         |    J4    | Serial port 2    |    J8    |
   |-------------------+----------+------------------+----------|
   | Reset switch      |    J5    | Parallel port    |   J10    |
   |-------------------+----------+------------------+----------|
   | IDE interface     |    J6    | Riser card       |   RC1    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            | Jumper/Switch |  Position  |
   |-------------------------------+---------------+------------|
   |>> | CPU speed select fast     |      J3       |    Open    |
   |---+---------------------------+---------------+------------|
   |   | CPU speed select slow     |      J3       | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | CPU speed switchable from |      J3       | pins 2 & 3 |
   |   | keyboard                  |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Bus speed select fast     |     SW1/7     |    Off     |
   |---+---------------------------+---------------+------------|
   |   | Bus speed select slow     |     SW1/7     |     On     |
   |---+---------------------------+---------------+------------|
   |>> | DRAM page                 |     SW1/8     |     On     |
   |   | mode/page-interleave      |               |            |
   |   | select auto               |               |            |
   |---+---------------------------+---------------+------------|
   |   | DRAM page                 |     SW1/8     |    Off     |
   |   | mode/page-interleave mode |               |            |
   |   | select page               |               |            |
   |---+---------------------------+---------------+------------|
   |>> | Parallel port interrupt   |      W1       | pins 1 & 2 |
   |   | select IRQ7               |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Parallel port interrupt   |      W1       | pins 2 & 3 |
   |   | select IRQ5               |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | NPU disabled              |      W2       | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | NPU enabled               |      W2       | pins 2 & 3 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Serial port 1 interrupt   |      W3       | pins 2 & 3 |
   |   | select IRQ4               |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Serial port 1 interrupt   |      W3       | pins 1 & 2 |
   |   | select IRQ3               |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Serial port 2 interrupt   |      W4       | pins 1 & 2 |
   |   | select IRQ3               |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Serial port 2 interrupt   |      W4       | pins 2 & 3 |
   |   | select IRQ4               |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Floppy drive interface    |      W5       |   Closed   |
   |   | enabled                   |               |            |
   |---+---------------------------+---------------+------------|
   |   | Floppy drive interface    |      W5       |    Open    |
   |   | disabled                  |               |            |
   |---+---------------------------+---------------+------------|
   |>> | IDE interface disabled    |      W12      |    Open    |
   |---+---------------------------+---------------+------------|
   |   | IDE interface enabled     |      W12      |   Closed   |
   |---+---------------------------+---------------+------------|
   |>> | Monitor type select       |      W13      | pins 1 & 2 |
   |   | monochrome                |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select color |      W13      | pins 2 & 3 |
   |   |                           |               |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
   |------+-------------+-------------+------------+------------|
   | 1MB  | (1) 256K x  |    NONE     |    NONE    |    NONE    |
   |      |     36      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 2MB  | (1) 256K x  | (1) 256K x  |    NONE    |    NONE    |
   |      |     36      |     36      |            |            |
   |------+-------------+-------------+------------+------------|
   | 3MB  | (1) 256K x  | (1) 256K x  | (1) 256K x |    NONE    |
   |      |     36      |     36      |     36     |            |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (1) 256K x  | (1) 256K x  | (1) 256K x | (1) 256K x |
   |      |     36      |     36      |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (1) 1M x 36 |    NONE     |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 5MB  | (1) 1M x 36 | (1) 256K x  |    NONE    |    NONE    |
   |      |             |     36      |            |            |
   |------+-------------+-------------+------------+------------|
   | 6MB  | (1) 256K x  | (1) 256K x  |  (1) 1M x  |    NONE    |
   |      |     36      |     36      |     36     |            |
   |------+-------------+-------------+------------+------------|
   | 7MB  | (1) 256K x  | (1) 256K x  |  (1) 1M x  | (1) 256K x |
   |      |     36      |     36      |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 8MB  | (1) 1M x 36 | (1) 1M x 36 |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 9MB  | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x |    NONE    |
   |      |             |             |     36     |            |
   |------+-------------+-------------+------------+------------|
   | 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 12MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |    NONE    |
   |      |             |             |     36     |            |
   |------+-------------+-------------+------------+------------|
   | 13MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  | (1) 256K x |
   |      |             |             |     36     |     36     |
   |------+-------------+-------------+------------+------------|
   | 16MB | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |  (1) 1M x  |
   |      |             |             |     36     |     36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM SWITCH CONFIGURATION                  |
   |------------------------------------------------------------|
   |   Size    |   SW1/1    |   SW1/2   |   SW1/3   |   SW1/4   |
   |-----------+------------+-----------+-----------+-----------|
   |    1MB    |    Off     |    On     |    On     |    On     |
   |-----------+------------+-----------+-----------+-----------|
   |    2MB    |     On     |    Off    |    On     |    On     |
   |-----------+------------+-----------+-----------+-----------|
   |    3MB    |    Off     |    Off    |    On     |    On     |
   |-----------+------------+-----------+-----------+-----------|
   |    4MB    |     On     |    On     |    Off    |    On     |
   |-----------+------------+-----------+-----------+-----------|
   |    4MB    |    Off     |    Off    |    Off    |    Off    |
   |-----------+------------+-----------+-----------+-----------|
   |    5MB    |    Off     |    On     |    Off    |    On     |
   |-----------+------------+-----------+-----------+-----------|
   |    6MB    |     On     |    Off    |    Off    |    On     |
   |-----------+------------+-----------+-----------+-----------|
   |    7MB    |    Off     |    Off    |    Off    |    On     |
   |-----------+------------+-----------+-----------+-----------|
   |    8MB    |     On     |    On     |    On     |    Off    |
   |-----------+------------+-----------+-----------+-----------|
   |    9MB    |    Off     |    On     |    On     |    Off    |
   |-----------+------------+-----------+-----------+-----------|
   |   10MB    |     On     |    Off    |    On     |    Off    |
   |-----------+------------+-----------+-----------+-----------|
   |   12MB    |     On     |    On     |    Off    |    Off    |
   |-----------+------------+-----------+-----------+-----------|
   |   13MB    |    Off     |    On     |    Off    |    Off    |
   |-----------+------------+-----------+-----------+-----------|
   |   16MB    |     On     |    On     |    On     |    On     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               DRAM WAIT STATE CONFIGURATION                |
   |------------------------------------------------------------|
   |  Wait state   |  Read state   |    SW1/5     |    SW1/6    |
   |---------------+---------------+--------------+-------------|
   |       1       |       2       |      On      |     Off     |
   |---------------+---------------+--------------+-------------|
   |       1       |       3       |     Off      |     On      |
   |---------------+---------------+--------------+-------------|
   |       2       |       3       |      On      |     On      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                PARALLEL PORT CONFIGURATION                 |
   |------------------------------------------------------------|
   |      Setting       |        W6         |        W7         |
   |--------------------+-------------------+-------------------|
   |        LPT1        |      Closed       |      Closed       |
   |--------------------+-------------------+-------------------|
   |        LPT2        |       Open        |       Open        |
   |--------------------+-------------------+-------------------|
   |      Disabled      |       Open        |      Closed       |
   |--------------------+-------------------+-------------------|
   |      Disabled      |      Closed       |       Open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 1 CONFIGURATION                 |
   |------------------------------------------------------------|
   |      Setting       |        W6         |        W7         |
   |--------------------+-------------------+-------------------|
   |        COM1        |      Closed       |      Closed       |
   |--------------------+-------------------+-------------------|
   |        COM3        |       Open        |       Open        |
   |--------------------+-------------------+-------------------|
   |      Disabled      |       Open        |      Closed       |
   |--------------------+-------------------+-------------------|
   |      Disabled      |      Closed       |       Open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 2 CONFIGURATION                 |
   |------------------------------------------------------------|
   |      Setting       |        W6         |        W7         |
   |--------------------+-------------------+-------------------|
   |        COM2        |      Closed       |      Closed       |
   |--------------------+-------------------+-------------------|
   |        COM4        |       Open        |       Open        |
   |--------------------+-------------------+-------------------|
   |      Disabled      |       Open        |      Closed       |
   |--------------------+-------------------+-------------------|
   |      Disabled      |      Closed       |       Open        |
   +------------------------------------------------------------+