
FIRST INTERNATIONAL COMPUTER, INC.

80386SX-20/25 SC/SI

Processor         80386SX
Processor Speed   20/25MHz
Chip Set          Symphony
Max. Onboard DRAM 32MB
Cache             16/32/64/128KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Turbo switch               JP30      Speaker                    JP33

  Turbo LED                  JP31      Power LED & keylock        JP34

  Reset switch               JP32

                        USER CONFIGURABLE SETTINGS

                  Function                      Jumper        Position

     Monitor type select monochrome/EGA          JP2           Open

      Monitor type select color                   JP2          Closed

  Note:JP21 is also used to set cache size, therefore its setting will
  vary when cache is enabled.

                            DRAM CONFIGURATION

   Size         Bank 0         Bank 1          Bank 2          Bank 3

   512KB     (2) 256K x 9       NONE            NONE            NONE

    1MB      (2) 256K x 9    (2) 256K x 9       NONE            NONE

   1.5MB     (2) 256K x 9    (2) 256K x 9    (2) 256K x 9       NONE

    2MB      (2) 256K x 9    (2) 256K x 9    (2) 256K x 9   (2) 256K x 9

    2MB       (2) 1M x 9        NONE            NONE            NONE

   2.5MB     (2) 256K x 9    (2) 1M x 9         NONE            NONE

    3MB      (2) 256K x 9    (2) 256K x 9    (2) 1M x 9         NONE

    4MB       (2) 1M x 9     (2) 1M x 9         NONE            NONE

    5MB      (2) 256K x 9    (2) 256K x 9    (2) 1M x 9      (2) 1M x 9

    6MB       (2) 1M x 9     (2) 1M x 9      (2) 1M x 9         NONE

    8MB       (2) 1M x 9     (2) 1M x 9      (2) 1M x 9      (2) 1M x 9

    8MB       (2) 4M x 9        NONE            NONE            NONE

    9MB      (2) 256K x 9    (2) 256K x 9    (2) 4M x 9         NONE

   10MB       (2) 1M x 9     (2) 4M x 9         NONE            NONE

   12MB       (2) 1M x 9     (2) 1M x 9      (2) 4M x 9         NONE

   16MB       (2) 4M x 9     (2) 4M x 9         NONE            NONE

   18MB       (2) 1M x 9     (2) 4M x 9      (2) 4M x 9         NONE

   20MB       (2) 1M x 9     (2) 1M x 9      (2) 4M x 9      (2) 4M x 9

   24MB       (2) 4M x 9     (2) 4M x 9      (2) 4M x 9         NONE

   26MB       (2) 1M x 9     (2) 4M x 9      (2) 4M x 9      (2) 4M x 9

   32MB       (2) 4M x 9     (2) 4M x 9      (2) 4M x 9      (2) 4M x 9

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     16KB        (2) 8K x 8        NONE       (1) 8K x 8

     32KB        (2) 8K x 8     (2) 8K x 8    (1) 8K x 8

     64KB       (2) 32K x 8        NONE       (1) 32K x 8

     128KB      (2) 32K x 8    (2) 32K x 8    (1) 32K x 8

                           CACHE JUMPER CONFIGURATION

  Size    JP3  JP10   JP16   JP17   JP18   JP19   JP20   JP21   JP27     JP29

  16KB    1 &   1 &    1 &   Open    1 &   1 &    1 &    1 &    Open    Closed
          2     2      2             2      2      2      2

  32KB    1 &   1 &    1 &    1 &    2 &   2 &    2 &    2 &    Closed   Open
          2     2      2      2      3      3      3      3

  64KB    2 &   2 &    1 &   Open    2 &   1 &    1 &    1 &    Open    Closed
          3     3      2             3      2      2      2

  128KB   2 &   2 &    2 &    2 &    2 &   2 &    2 &    2 &    Closed   Open
          3     3      3      3      3      3      3      3

  Note:Pins designated should be in the closed position.

                     CACHE JUMPER CONFIGURATION

  Setting       JP4        JP5         JP6         JP7        JP8

  Enabled      1 & 2      1 & 2       Open        Open       Open

  Disabled     2 & 3      2 & 3      Closed      Closed     Closed

  Note:Pins designated should be in the closed position.

                    CACHE JUMPER CONFIGURATION (CONT)

  Setting      JP9        JP11      JP12      JP13      JP14       JP15

  Enabled      Open       Open      Open      1 & 2     Open       Open

  Disabled    Closed     Closed    Closed     Open     Closed     Closed

  Note:Pins designated should be in the closed position.

                    CACHE JUMPER CONFIGURATION (CONT)

  Setting      JP22      JP23     JP24       JP25       JP26       JP28

  Enabled      Open      Open    Closed      Open       Open       Open

  Disabled    Closed     Open     Open      Closed     Closed     Closed

