
UNIDENTIFIED

386SX-20/25

Processor         80386SX
Processor Speed   20/25MHz
Chip Set          Headland
Max. onboard DRAM 8MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            JP3       Turbo Switch              JP11

  Power LED & keylock         JP9       Speaker                   JP12

  Turbo LED                   JP10      Reset                     JP13

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                JP2            Closed

      Monitor type select monochrome           JP2             Open

                            DRAM CONFIGURATION

    Size        Bank 0        Bank 1          Bank 2           Bank 3

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

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

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

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

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

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

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

   4.5MB      (2) 1M x 9    (2) 1M x 9     (2) 256K x 9         NONE

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

                        PIPELINE MODE CONFIGURATION

      Mode        CPU Speed        JP5            JP6            JP7

    Enabled      20 or 25MHz    pins 2 & 3     pins 1 & 2     pins 2 & 3
                                  closed        closed          closed

    Disabled     20mhz only     pins 1 & 2     pins 2 & 3     pins 1 & 2
                                  closed        closed          closed

