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.