UNIDENTIFIED

386SX-25

Processor         80386SX
Processor Speed   25MHz
Chip Set          Unidentified
Max. Onboard DRAM 16MB
Cache             None
BIOS              Unidentified
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            JP17      Turbo switch              JP24

  Speaker                     JP21      Turbo LED                 JP25

  Power LED & keylock         JP22      Reset switch              JP26

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP16             Open

      CMOS memory clear                       JP16            Closed

  »   Monitor type select color               JP18            Closed

      Monitor type select monochrome          JP18             Open

  »   Floppy drive current select             JP19            Closed
      (24mA)

      Floppy drive current select             JP19             Open
      (12mA)

  »   Pipeline mode enabled                   JP20            Closed

      Pipeline mode disabled                  JP20             Open

  »   NPU disabled                            JP23           pins 2 & 3
                                                              closed

      NPU enabled                             JP23           pins 1 & 2
                                                              closed

                            DRAM CONFIGURATION

  Size     Bank 0       P-0       Bank 1       P-1       Bank 2   Bank 3

  512KB      (4)         (2)       NONE        NONE      NONE      NONE
            44256      41256

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

   1MB       (4)         (2)        (4)         (2)      NONE      NONE
            44256      41256       44256      41256

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

   2MB       (4)         (2)       NONE        NONE      NONE      NONE
           441000      411000

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

   4MB       (4)         (2)        (4)         (2)      NONE      NONE
           441000      411000     441000      411000

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

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

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