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

   MBVLSI-168 (V.2)

   Processor              80286                                   
   Processor Speed        8/12MHz                                 
   Chip Set               Unidentified                            
   Video Chip Set         None                                    
   Maximum Onboard Memory 4MB                                     
   Maximum Video Memory   None                                    
   Cache                  None                                    
   BIOS                   Unidentified                            
   Dimensions             330mm x 218mm                           
   I/O Options            None                                    
   NPU Options            80287                                   

<gopher://bitreich.org/I/th99/m/C-D/33605-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Reset switch      |   JP1    | Turbo switch     |   JP4    |
   |-------------------+----------+------------------+----------|
   | Power LED &       |   JP2    | Turbo LED        |   JP5    |
   | keylock           |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |   JP3    | External battery |   JP17   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  JP6  | Pins 1 & 2 |
   |   | (100ns memory)                    |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Wait state select 0 wait states   | JP10  |   Closed   |
   |---+-----------------------------------+-------+------------|
   |   | Wait state select 1 wait state    | JP10  |    Open    |
   |---+-----------------------------------+-------+------------|
   |   | BIOS type select 27256            | JP11  |   Closed   |
   |---+-----------------------------------+-------+------------|
   |   | BIOS type select 27128            | JP11  |    Open    |
   |---+-----------------------------------+-------+------------|
   |   | Monitor type select color         | JP12  |   Closed   |
   |---+-----------------------------------+-------+------------|
   |   | Monitor type select monochrome    | JP12  |    Open    |
   |---+-----------------------------------+-------+------------|
   |>> | Power good signal detect from     | JP16  | Pins 1 & 2 |
   |   | board                             |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Power good signal detect from     | JP16  | Pins 2 & 3 |
   |   | power supply                      |       |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    DRAM CONFIGURATION 1                    |
   |------------------------------------------------------------|
   |  Size  |  Bank 0A   |  Parity 0  |  Bank 0B   |  Parity 1  |
   |--------+------------+------------+------------+------------|
   | 512KB  | (4) 44256  | (2) 41256  |    None    |    None    |
   |--------+------------+------------+------------+------------|
   |  1MB   | (4) 44256  | (2) 41256  | (4) 44256  | (2) 41256  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                DRAM JUMPER CONFIGURATION 1                 |
   |------------------------------------------------------------|
   |     Size     |      JP7      |     JP8      |     JP9      |
   |--------------+---------------+--------------+--------------|
   |    512KB     |    Closed     |    Closed    |    Closed    |
   |--------------+---------------+--------------+--------------|
   |     1MB      |    Closed     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    DRAM CONFIGURATION 2                    |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |  Parity 0  |   Bank 1   |  Parity 1  |
   |-------+-------------+------------+------------+------------|
   | 512KB | (16) 41256  | (2) 41256  |    None    |    None    |
   |-------+-------------+------------+------------+------------|
   | 640KB | (16) 41256  | (2) 41256  | (16) 4164  |  (2) 4164  |
   |-------+-------------+------------+------------+------------|
   |  1MB  | (16) 41256  | (2) 41256  | (16) 41256 | (2) 41256  |
   |-------+-------------+------------+------------+------------|
   |  2MB  | (16) 411000 | (2) 411000 |    None    |    None    |
   |-------+-------------+------------+------------+------------|
   |  4MB  | (16) 411000 | (2) 411000 |    (16)    | (2) 411000 |
   |       |             |            |   411000   |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                DRAM JUMPER CONFIGURATION 2                 |
   |------------------------------------------------------------|
   |     Size     |      JP7      |     JP8      |     JP9      |
   |--------------+---------------+--------------+--------------|
   |    512KB     |    Closed     |    Closed    |    Closed    |
   |--------------+---------------+--------------+--------------|
   |    640KB     |    Closed     |    Closed    |     Open     |
   |--------------+---------------+--------------+--------------|
   |     1MB      |    Closed     |     Open     |    Closed    |
   |--------------+---------------+--------------+--------------|
   |     2MB      |    Closed     |     Open     |     Open     |
   |--------------+---------------+--------------+--------------|
   |     4MB      |     Open      |    Closed    |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    DRAM CONFIGURATION 3                    |
   |------------------------------------------------------------|
   |       Size       |       Bank 2       |       Bank 3       |
   |------------------+--------------------+--------------------|
   |      512KB       |    (2) 256K x 9    |        None        |
   |------------------+--------------------+--------------------|
   |       1MB        |    (2) 256K x 9    |    (2) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       2MB        |     (2) 1M x 9     |        None        |
   |------------------+--------------------+--------------------|
   |       4MB        |     (2) 1M x 9     |     (2) 1M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                DRAM JUMPER CONFIGURATION 3                 |
   |------------------------------------------------------------|
   |     Size     |      JP7      |     JP8      |     JP9      |
   |--------------+---------------+--------------+--------------|
   |    512KB     |    Closed     |    Closed    |    Closed    |
   |--------------+---------------+--------------+--------------|
   |     1MB      |    Closed     |     Open     |    Closed    |
   |--------------+---------------+--------------+--------------|
   |     2MB      |    Closed     |     Open     |     Open     |
   |--------------+---------------+--------------+--------------|
   |     4MB      |     Open      |    Closed    |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                KEYBOARD BIOS PIN SELECTION                 |
   |------------------------------------------------------------|
   |  Setting   |   JP13    |   JP14    |   JP15    |   JP18    |
   |------------+-----------+-----------+-----------+-----------|
   |   Pin 23   |   Open    |  Closed   |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |   Pin 27   |   Open    |   Open    |  Closed   |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |   Pin 30   |  Closed   |   Open    |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |   Pin 32   |   Open    |   Open    |   Open    |  Closed   |
   +------------------------------------------------------------+