(TXT) View Source
       
       # FRONTIER INDUSTRIAL, INC.
       
          VLSI 82C486
       
          Processor             80486SX/80486DX                          
          Processor Speed       16/20/25/33MHz                           
          Chip Set              VLSI                                     
          Max. Onboard DRAM     32MB                                     
          Cache                 None                                     
          BIOS                  Award                                    
          Dimensions            220mm x 220mm                            
          I/O Options           None                                     
          NPU Options           4167                                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | External battery |    J3    | Turbo LED         |    J6    |
          |------------------+----------+-------------------+----------|
          | Speaker          |    J4    | Power LED &       |    J7    |
          |                  |          | keylock           |          |
          |------------------+----------+-------------------+----------|
          | Turbo switch     |    J5    | Reset switch      |   JP1    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |             Function             | Jumper |    Position    |
          |----------------------------------+--------+----------------|
          | » | CMOS memory normal operation |  JP2   |   pins 3 & 4   |
          |   |                              |        |     closed     |
          |---+------------------------------+--------+----------------|
          |   | CMOS memory clear            |  JP2   |   pins 1 & 2   |
          |   |                              |        |     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     |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |    Type    |  OSC1  |     JP3      |    JP4    |    JP5    |
          |            | (MHz)  |              |           |           |
          |------------+--------+--------------+-----------+-----------|
          | 80486SX-16 | 33MHz  |  pins 2 & 3  | pins 1 &  |   Open    |
          |            |        |    closed    | 2 closed  |           |
          |------------+--------+--------------+-----------+-----------|
          | 80486SX-20 | 40MHz  |  pins 2 & 3  | pins 1 &  |   Open    |
          |            |        |    closed    | 2 closed  |           |
          |------------+--------+--------------+-----------+-----------|
          | 80486SX-25 | 50MHz  |  pins 2 & 3  | pins 1 &  |   Open    |
          |            |        |    closed    | 2 closed  |           |
          |------------+--------+--------------+-----------+-----------|
          | 80486DX-25 | 50MHz  |  pins 1 & 2  | pins 2 &  | pins 1 &  |
          |            |        |    closed    | 3 closed  | 2 closed  |
          |------------+--------+--------------+-----------+-----------|
          | 80486DX-33 | 66MHz  |  pins 1 & 2  | pins 2 &  | pins 1 &  |
          |            |        |    closed    | 3 closed  | 2 closed  |
          +------------------------------------------------------------+