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

   PLM-2531P/3331P/5031P

   Processor         80486SX/80487SX/ODP80486SX/80486DX/80486DX2  
   Processor Speed   25/33/40/50(internal)/50/66(internal)MHz     
   Chip Set          OPTI                                         
   Max. Onboard DRAM 128MB                                        
   Cache             64/128/256KB                                 
   BIOS              AMI/DTK                                      
   Dimensions        330mm x 218mm                                
   I/O Options       None                                         
   NPU Options       4167                                         

<gopher://bitreich.org/I/th99/m/C-D/32155-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Reset switch   |    J1    | Speaker             |    J4    |
   |----------------+----------+---------------------+----------|
   | Turbo switch   |    J2    | Power LED & keylock |    J5    |
   |----------------+----------+---------------------+----------|
   | Turbo LED      |    J3    | External battery    |   J12    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper  | Position  |
   |--------------------------------------+---------+-----------|
   |>> | Turbo switch enabled             |   J2    |  Closed   |
   |---+----------------------------------+---------+-----------|
   |   | turbo switch disabled            |   J2    |   Open    |
   |---+----------------------------------+---------+-----------|
   |>> | Monitor type select monochrome   |   J11   |   Open    |
   |---+----------------------------------+---------+-----------|
   |   | Monitor type select color        |   J11   |  Closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (4) 16M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |      128MB       |    (4) 16M x 9     |    (4) 16M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  | Bank 0 | Bank  |  TAG   | Dirty  |  TAG   |  TAG   |
   |       |        |   1   | (U30)  | (U31)  | (U32)  | (U33)  |
   |-------+--------+-------+--------+--------+--------+--------|
   | 64KB  | (4) 8K |  (4)  | (1) 8K | (1) 8K | (1) 8K |  NONE  |
   |       |  x 8   | 8K x  |  x 1   |  x 1   |  x 8   |        |
   |       |        |   8   |        |        |        |        |
   |-------+--------+-------+--------+--------+--------+--------|
   | 128KB |  (4)   | NONE  | (1) 8K | (1) 8K | (1) 8K |  NONE  |
   |       | 32K x  |       |  x 1   |  x 1   |  x 8   |        |
   |       |   8    |       |        |        |        |        |
   |-------+--------+-------+--------+--------+--------+--------|
   | 256KB |  (4)   |  (4)  | (1) 8K | (1) 8K |  NONE  |  (1)   |
   |       | 32K x  | 32K x |  x 1   |  x 1   |        | 32K x  |
   |       |   8    |   8   |        |        |        |   8    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size    |                      J10                       |
   |-----------+------------------------------------------------|
   |   64KB    |               pins 9 & 10 closed               |
   |-----------+------------------------------------------------|
   |   128KB   |       pins 1 & 2, 5 & 6, 11 & 12 closed        |
   |-----------+------------------------------------------------|
   |   256KB   | pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |           Type           |               J9                |
   |--------------------------+---------------------------------|
   |         80486SX          |       pins 9 & 10 closed        |
   |--------------------------+---------------------------------|
   |         80487SX          | pins 3 & 4, 5 & 6, 7 & 8 closed |
   |--------------------------+---------------------------------|
   |        ODP80486SX        | pins 3 & 4, 5 & 6, 7 & 8 closed |
   |--------------------------+---------------------------------|
   |       80486DX/DX2        | pins 1 & 2, 3 & 4, 5 & 6 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |    Speed    |        J6         |     J7      |     J8     |
   |-------------+-------------------+-------------+------------|
   |    25MHz    | pins 2 & 3 closed |    Open     |   Closed   |
   |-------------+-------------------+-------------+------------|
   |    33MHz    | pins 1 & 2 closed |   Closed    |    Open    |
   |-------------+-------------------+-------------+------------|
   |    40MHz    | pins 2 & 3 closed |    Open     |   Closed   |
   |-------------+-------------------+-------------+------------|
   |   50iMHz    | pins 2 & 3 closed |    Open     |   Closed   |
   |-------------+-------------------+-------------+------------|
   |    50MHz    | pins 2 & 3 closed |    Open     |   Closed   |
   |-------------+-------------------+-------------+------------|
   |   66iMHz    | pins 1 & 2 closed |   Closed    |    Open    |
   +------------------------------------------------------------+