SILICON STAR INTERNATIONAL, INC.
================================

   486SX-AR4

   Processor             80486SX/80487SX/80486DX                  
   Processor Speed       20/25/33MHz                              
   Chip Set              Acer                                     
   Max. Onboard DRAM     32MB                                     
   Cache                 None                                     
   BIOS                  AMI                                      
   Dimensions            230mm x 220mm                            
   I/O Options           None                                     
   NPU Options           None                                     

<gopher://bitreich.org/I/th99/m/A-B/31031-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose          | Location  |
   |------------------+----------+------------------+-----------|
   | External battery |    J4    | Turbo LED        | J21 pins  |
   |                  |          |                  |   1 & 2   |
   |------------------+----------+------------------+-----------|
   | Reset switch     |   J19    | Turbo switch     | J21 pins  |
   |                  |          |                  |   4 & 5   |
   |------------------+----------+------------------+-----------|
   | Speaker          |   J20    | Power LED &      |    J22    |
   |                  |          | keylock          |           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Jumper |  Position   |
   |-------------------------------------+--------+-------------|
   |>> | Monitor type select color       |  JP1   | pins 2 & 3  |
   |   |                                 |        |   closed    |
   |---+---------------------------------+--------+-------------|
   |   | Monitor type select monochrome  |  JP1   | pins 1 & 2  |
   |   |                                 |        |   closed    |
   |---+---------------------------------+--------+-------------|
   |>> | Real time clock select MC146818 |  JP2   |    Open     |
   |---+---------------------------------+--------+-------------|
   |   | Real time clock select DS1287   |  JP2   |   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        |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |       Type       |        JP4         |        JP5         |
   |------------------+--------------------+--------------------|
   |     80486SX      | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |     80487SX      |        Open        | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |     80486DX      | pins 2 & 3 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                I/O BUS SPEED CONFIGURATION                 |
   |------------------------------------------------------------|
   |      Speed       |        JP3         |        JP6         |
   |------------------+--------------------+--------------------|
   |      CLK2/5      | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      CLK2/6      | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      CLK2/8      | pins 1 & 2 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+