
UNIDENTIFIED

386-25 BOARD

Processor         80386SX
Processor Speed   25MHz
Chip Set          OPTI
Max. Onboard DRAM 16MB (8MB on external memory card)
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card
NPU Options       80387SX/3167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Power LED & keylock        J17       Turbo switch               J21

  Speaker                    J18       Turbo LED                  J22

  Reset switch               J19       32-bit external            SL1
                                       memory card

  External battery           J20

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Battery type select internal            J20              Open

      Battery type select external            J20             Closed

     Monitor type select monochrome          JP3           pins 2 & 3
                                                              closed

      Monitor type select color/EGA           JP3           pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP5           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP5           pins 2 & 3
                                                              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 x 9      NONE           NONE

     3MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9      NONE

     4MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9  (4) 256K x 9

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

     5MB        (4) 256K x 9   (4) 1M x 9        NONE           NONE

     5MB        (4) 1M x 9     (4) 256K x 9      NONE           NONE

     6MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9        NONE

     6MB        (4) 256K x 9   (4) 1M x 9     (4) 256K x 9      NONE

     6MB        (4) 1M x 9     (4) 256K x 9   (4) 256K x 9      NONE

     7MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9    (4) 256K x 9

     7MB        (4) 256K x 9   (4) 1M x 9     (4) 256K x 9  (4) 256K x 9

     7MB        (4) 1M x 9     (4) 256K x 9   (4) 256K x 9  (4) 256K x 9

     8MB        (4) 1M x 9     (4) 1M x 9        NONE           NONE

     9MB        (4) 256K x 9   (4) 1M x 9     (4) 1M x 9        NONE

     9MB        (4) 1M x 9     (4) 1M x 9     (4) 256K x 9      NONE

     9MB        (4) 1M x 9     (4) 256K x 9   (4) 1M x 9        NONE

     10MB       (4) 256K x 9   (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

     10MB       (4) 256K x 9   (4) 1M x 9     (4) 1M x 9    (4) 256K x 9

     10MB       (4) 1M x 9     (4) 1M x 9     (4) 256K x 9  (4) 256K x 9

     10MB       (4) 1M x 9     (4) 256K x 9   (4) 1M x 9    (4) 256K x 9

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

     13MB       (4) 256K x 9   (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     13MB       (4) 1M x 9     (4) 1M x 9     (4) 256K x 9   (4) 1M x 9

     13MB       (4) 1M x 9     (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

     16MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

  Note: Banks 2 & 3 are located on the external memory card.

          MISCELLANEOUS TECHNICAL NOTE

  Note: The location of pin 1 is unidentified.

