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

   PEM-2531D

   Processor           80386DX                                    
   Processor Speed     25MHz                                      
   Chip Set            DTK                                        
   Max. Onboard DRAM   16MB (8MB on external memory card)         
   Cache               None                                       
   BIOS                DTK                                        
   Dimensions          333mm x 222mm                              
   I/O Options         32-bit external memory card slot (PEI-307) 
   NPU Options         80387/3167                                 

<gopher://bitreich.org/I/th99/m/C-D/30357-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose     | Location | Purpose                | Location |
   |-------------+----------+------------------------+----------|
   | Power LED & |    J1    | Turbo switch           |    J4    |
   | keylock     |          |                        |          |
   |-------------+----------+------------------------+----------|
   | Speaker     |    J2    | Reset switch           |    J5    |
   |-------------+----------+------------------------+----------|
   | Turbo LED   |    J3    | 32-bit external memory |    S1    |
   |             |          | card                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            | Jumper/Switch |  Position  |
   |-------------------------------+---------------+------------|
   |>> | CPU speed select fast     |      J4       |    Open    |
   |---+---------------------------+---------------+------------|
   |   | CPU speed select slow     |      J4       | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | CPU speed select          |      J4       | pins 2 & 3 |
   |   | switchable from keyboard  |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | NPU disabled              |      W1       | pins 2 & 3 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | NPU enabled               |      W1       | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Monitor type select       |      W2       | pins 1 & 2 |
   |   | monochrome                |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select color |      W2       | pins 2 & 3 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Bus speed select CPU/2    |     SW1/7     |    Off     |
   |---+---------------------------+---------------+------------|
   |   | Bus speed select CPU/4    |     SW1/7     |     On     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       1MB        |    (4) 256K x 9    |        NONE        |
   |------------------+--------------------+--------------------|
   |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM SWITCH CONFIGURATION                  |
   |------------------------------------------------------------|
   |  Size   |  SW1/1   |  SW1/2  |  SW1/3  |  SW1/4  |  SW1/8  |
   |---------+----------+---------+---------+---------+---------|
   |   1MB   |   Off    |   On    |   On    |   On    |   Off   |
   |---------+----------+---------+---------+---------+---------|
   |   2MB   |    On    |   Off   |   On    |   On    |   On    |
   |---------+----------+---------+---------+---------+---------|
   |   4MB   |   Off    |   Off   |   Off   |   Off   |   Off   |
   |---------+----------+---------+---------+---------+---------|
   |   5MB   |   Off    |   On    |   Off   |   On    |   Off   |
   |---------+----------+---------+---------+---------+---------|
   |   8MB   |    On    |   On    |   On    |   Off   |   On    |
   +------------------------------------------------------------+

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