DYNA MICRO, INC.
================

   MBA-486AI-33, 50

   Processor             80486SX/80487SX/80486DX                  
   Processor Speed       16/20/25/33/50MHz                        
   Chip Set              SIS                                      
   Max. Onboard DRAM     32MB                                     
   Cache                 64/128/256KB                             
   BIOS                  AMI/Award                                
   Dimensions            330mm x 218mm                            
   I/O Options           32-bit external memory card slot         
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/C-D/31045-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose               | Location | Purpose      | Location |
   |-----------------------+----------+--------------+----------|
   | External battery      |   BAT    | Reset switch |   RST    |
   |-----------------------+----------+--------------+----------|
   | 32-bit external       |   CN1    | Speaker      |   SPK    |
   | memory card           |          |              |          |
   |-----------------------+----------+--------------+----------|
   | Power LED & keylock   |   KEY    | Turbo switch |   TSW    |
   |-----------------------+----------+--------------+----------|
   | Turbo LED             |   LED    |              |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Power good signal detect from    |  JP1   | pins 1 & 2 |
   |   | power supply                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Power good signal detect from    |  JP1   | pins 2 & 3 |
   |   | board                            |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size   |    Bank 0    |  Bank 1   |  Bank 2   |  Bank 3   |
   |---------+--------------+-----------+-----------+-----------|
   |   1MB   | (4) 256K x 9 |   NONE    |   NONE    |   NONE    |
   |---------+--------------+-----------+-----------+-----------|
   |   2MB   | (4) 256K x 9 | (4) 256K  |   NONE    |   NONE    |
   |         |              |    x 9    |           |           |
   |---------+--------------+-----------+-----------+-----------|
   |   4MB   |  (4) 1M x 9  |   NONE    |   NONE    |   NONE    |
   |---------+--------------+-----------+-----------+-----------|
   |   6MB   | (4) 256K x 9 | (4) 256K  | (4) 1M x  |   NONE    |
   |         |              |    x 9    |     9     |           |
   |---------+--------------+-----------+-----------+-----------|
   |   8MB   |  (4) 1M x 9  | (4) 1M x  |   NONE    |   NONE    |
   |         |              |     9     |           |           |
   |---------+--------------+-----------+-----------+-----------|
   |  10MB   | (4) 256K x 9 | (4) 256K  | (4) 1M x  | (4) 1M x  |
   |         |              |    x 9    |     9     |     9     |
   |---------+--------------+-----------+-----------+-----------|
   |  12MB   |  (4) 1M x 9  | (4) 1M x  | (4) 1M x  |   NONE    |
   |         |              |     9     |     9     |           |
   |---------+--------------+-----------+-----------+-----------|
   |  16MB   |  (4) 1M x 9  | (4) 1M x  | (4) 1M x  | (4) 1M x  |
   |         |              |     9     |     9     |     9     |
   |---------+--------------+-----------+-----------+-----------|
   |  16MB   |  (4) 4M x 9  |   NONE    |   NONE    |   NONE    |
   |---------+--------------+-----------+-----------+-----------|
   |  18MB   | (4) 256K x 9 | (4) 256K  | (4) 4M x  |   NONE    |
   |         |              |    x 9    |     9     |           |
   |---------+--------------+-----------+-----------+-----------|
   |  20MB   |  (4) 1M x 9  | (4) 4M x  |   NONE    |   NONE    |
   |         |              |     9     |           |           |
   |---------+--------------+-----------+-----------+-----------|
   |  24MB   |  (4) 1M x 9  | (4) 1M x  | (4) 4M x  |   NONE    |
   |         |              |     9     |     9     |           |
   |---------+--------------+-----------+-----------+-----------|
   |  32MB   |  (4) 4M x 9  | (4) 4M x  |   NONE    |   NONE    |
   |         |              |     9     |           |           |
   |---------+--------------+-----------+-----------+-----------|
   |  36MB   |  (4) 1M x 9  | (4) 4M x  | (4) 4M x  |   NONE    |
   |         |              |     9     |     9     |           |
   |---------+--------------+-----------+-----------+-----------|
   |  40MB   |  (4) 1M x 9  | (4) 1M x  | (4) 4M x  | (4) 4M x  |
   |         |              |     9     |     9     |     9     |
   |---------+--------------+-----------+-----------+-----------|
   |  48MB   |  (4) 4M x 9  | (4) 4M x  | (4) 4M x  |   NONE    |
   |         |              |     9     |     9     |           |
   |---------+--------------+-----------+-----------+-----------|
   |  64MB   |  (4) 4M x 9  | (4) 4M x  | (4) 4M x  | (4) 4M x  |
   |         |              |     9     |     9     |     9     |
   |------------------------------------------------------------|
   | Note:Banks 2 and 3 are used when a 32-bit external memory  |
   | card is installed at CN1.                                  |
   +------------------------------------------------------------+

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

   +------------------------------------------------------------+
   |                CACHE RESISTOR CONFIGURATION                |
   |------------------------------------------------------------|
   |    Size    |      R1       |      R2       |      R3       |
   |------------+---------------+---------------+---------------|
   |    64KB    |   Installed   | Not installed | Not installed |
   |------------+---------------+---------------+---------------|
   |   128KB    | Not installed |   Installed   | Not installed |
   |------------+---------------+---------------+---------------|
   |   256KB    | Not installed | Not installed |   Installed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Type   | SW1/1  | SW1/2  | SW1/3  | SW1/4 | SW1/5 | SW1/6 |
   |---------+--------+--------+--------+-------+-------+-------|
   | 80486SX |  Off   |  Off   |  Off   |  Off  |  On   |  On   |
   |---------+--------+--------+--------+-------+-------+-------|
   | 80487SX |  Off   |   On   |   On   |  On   |  Off  |  On   |
   |---------+--------+--------+--------+-------+-------+-------|
   | 80486DX |   On   |   On   |   On   |  On   |  On   |  On   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |      Speed       |        JP2         |        JP3         |
   |------------------+--------------------+--------------------|
   |      16MHz       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      20MHz       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      25MHz       | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      33MHz       | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      50MHz       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+