COMPUTREND SYSTEMS, INC.
========================

   CONTAQ-486

   Processor             80486SX/80487SX/80486DX                  
   Processor Speed       16/20/25/33/50MHz                        
   Chip Set              CONTAQ                                   
   Max. Onboard DRAM     32MB                                     
   Cache                 64/256KB                                 
   BIOS                  AMI                                      
   Dimensions            330mm x 218mm                            
   I/O Options           None                                     
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/C-D/30412-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose   |   Location   | Purpose           |  Location   |
   |-----------+--------------+-------------------+-------------|
   | Keylock   | J3 pins 1 &  | Turbo switch      | J3 pins 15  |
   |           |      2       |                   |    - 17     |
   |-----------+--------------+-------------------+-------------|
   | Power LED | J3 pins 3 -  | Reset switch      | J3 19 & 20  |
   |           |      5       |                   |             |
   |-----------+--------------+-------------------+-------------|
   | Speaker   | J3 pins 7 -  | Auxiliary         |     J4      |
   |           |      10      | keyboard          |             |
   |-----------+--------------+-------------------+-------------|
   | Turbo LED | J3 pins 12 & | External battery  |     JP2     |
   |           |      13      |                   |             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper  | Position  |
   |--------------------------------------+---------+-----------|
   |>> | Monitor type select color        |   JP1   |  Closed   |
   |---+----------------------------------+---------+-----------|
   |   | Monitor type select monochrome   |   JP1   |   Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       17MB       |     (4) 4M x 9     |    (4) 256K 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  |                        JP8                         |
   |-------+----------------------------------------------------|
   | 64KB  | pins 1A & 2A closed, pins 3A & 4A closed, pins 1C  |
   |       |       & 2C closed, and pins 3C & 4C closed.        |
   |-------+----------------------------------------------------|
   | 256KB | pins 1B & 2B closed, pins 3B & 4B closed, pins 1D  |
   |       |       & 2D closed, and pins 3D & 4D closed.        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Type   |                 Jumper block JP7                 |
   |---------+--------------------------------------------------|
   | 80486DX |  pins 4A & 4B closed, pins 4C & 4D closed, pins  |
   |         |     1A & 1B closed, and pins 1C & 1D closed.     |
   |---------+--------------------------------------------------|
   | 80487SX |  pins 4A & 4B closed, pins 4C & 4D closed, pins  |
   |         |     2A & 2B closed, and pins 2C & 2D closed.     |
   |---------+--------------------------------------------------|
   | 80486SX |  pins 1B & 2B closed, pins 3B & 4B closed, pins  |
   |         |     1D & 2D closed, and pins 3D & 4D closed.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   | CPU Speed  |  OSC1   |   JP3   |   JP5    |  JP6   |  JP9  |
   |------------+---------+---------+----------+--------+-------|
   |   16MHz    |  32MHz  |  2 & 3  |   Open   |  Open  | 1 & 2 |
   |------------+---------+---------+----------+--------+-------|
   |   20MHz    |  40MHz  |  1 & 2  |   Open   |  Open  | 1 & 2 |
   |------------+---------+---------+----------+--------+-------|
   |   25MHz    |  25MHz  |  1 & 2  |  Closed  |  Open  | 2 & 3 |
   |------------+---------+---------+----------+--------+-------|
   |   33MHz    |  33MHz  |  1 & 2  |   Open   | Closed | 2 & 3 |
   |------------+---------+---------+----------+--------+-------|
   |   50MHz    |  50MHz  |  1 & 2  |  Closed  | Closed | 2 & 3 |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+