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

   FEAT-5031

   Processor         80486SX/80487SX/80486DX/80486DX2             
   Processor Speed   16/20/25/33/50(internal)/50MHz               
   Chip Set          Symphony                                     
   Max. Onboard DRAM 32MB                                         
   Cache             64/256KB                                     
   BIOS              AMI/DTK                                      
   Dimensions        330mm x 218mm                                
   I/O Options       None                                         
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/C-D/33226-1.png>
   

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

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |   | Turbo enabled                    |   J2   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | Turbo disabled                   |   J2   | Pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Turbo controlled by keyboard     |   J2   | Pins 2 & 3 |
   |   | CTRL, ALT, -                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Cache wait state select 0 wait   |   J9   |   Closed   |
   |   | states                           |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Cache wait state select 1 wait   |   J9   |    Open    |
   |   | state                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select monochrome   |  J13   | Pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select color        |  J13   | Pins 2 & 3 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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     |
   |------------------+--------------------+--------------------|
   |       5MB        |     (4) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       17MB       |    (4) 256K x 9    |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |        TAG         |
   |------------------+--------------------+--------------------|
   |       64KB       |     (8) 8K x 8     |     (1) 8K x 8     |
   |------------------+--------------------+--------------------|
   |      256KB       |    (8) 32K x 8     |    (1) 32K x 8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |       J6        |       J7        |       J8       |
   |-------+-----------------+-----------------+----------------|
   | 64KB  |   Pins 1 & 2    |   Pins 1 & 2    |   Pins 1 & 2   |
   |       |     closed      |     closed      |     closed     |
   |-------+-----------------+-----------------+----------------|
   | 256KB |   Pins 2 & 3    |   Pins 2 & 3    |   Pins 2 & 3   |
   |       |     closed      |     closed      |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |     Type     |    J10     |        J11        |    J12     |
   |--------------+------------+-------------------+------------|
   |   80486SX    |    Open    | Pins 2 & 3 closed |    Open    |
   |--------------+------------+-------------------+------------|
   |   80487SX    |    N/A     |        N/A        |    N/A     |
   |--------------+------------+-------------------+------------|
   |   80486DX    |   Closed   | Pins 1 & 2 closed |   Closed   |
   |--------------+------------+-------------------+------------|
   |   80486DX2   |   Closed   | Pins 1 & 2 closed |   Closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Speed   |  J14   |  J15   |  J16   |    J17     |  J18   |
   |-----------+--------+--------+--------+------------+--------|
   |   16MHz   | Closed |  Open  |  Open  | Pins 1 & 2 |  Open  |
   |           |        |        |        |   closed   |        |
   |-----------+--------+--------+--------+------------+--------|
   |   20MHz   | Closed |  Open  |  Open  | Pins 1 & 2 |  Open  |
   |           |        |        |        |   closed   |        |
   |-----------+--------+--------+--------+------------+--------|
   |   25MHz   | Closed |  Open  |  Open  | Pins 1 & 2 |  Open  |
   |           |        |        |        |   closed   |        |
   |-----------+--------+--------+--------+------------+--------|
   |   33MHz   | Closed |  Open  |  Open  | Pins 1 & 2 |  Open  |
   |           |        |        |        |   closed   |        |
   |-----------+--------+--------+--------+------------+--------|
   |  50iMHz   | Closed |  Open  |  Open  | Pins 1 & 2 | Closed |
   |           |        |        |        |   closed   |        |
   |-----------+--------+--------+--------+------------+--------|
   | 50MHz (A) | Closed | Closed | Closed | Pins 2 & 3 | Closed |
   |           |        |        |        |   closed   |        |
   |-----------+--------+--------+--------+------------+--------|
   | 50MHz (B) |  Open  | Closed |  Open  | Pins 2 & 3 | Closed |
   |           |        |        |        |   closed   |        |
   |------------------------------------------------------------|
   | Note: (A) 20ns cache installed. (B) 15ns cache installed.  |
   +------------------------------------------------------------+