
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

