UNIDENTIFIED

404 386SX

Processor              80386SX
Processor Speed        16/20/25MHz
Chip Set               ALI
Video Chip Set         None
Maximum Onboard Memory 8MB
Maximum Video Memory   None
Cache                  None
BIOS                   AMI
Dimensions             254mm x 218mm
I/O Options            None
NPU Options            80387SX

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  External battery          J1         Power LED &               J20
                                       keylock

  Reset switch             J18         Turbo LED             J21 pins 1 &
                                                                  2

  Speaker                  J19         Turbo switch          J21 pins 4 &
                                                                  5

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Fast A20 gate signal from chip           J4           Pins 1 & 2
      set                                                     closed

      Fast A20 gate signal from                J4           Pins 2 & 3
      keyboard controller                                     closed

      Monitor type select color               JP1           Pins 2 & 3
                                                              closed

      Monitor type select monochrome          JP1           Pins 1 & 2
                                                              closed

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

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

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

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

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

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

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

      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

                     CPU SPEED SELECTION

        Speed                 J3                   J5

        16MHz          Pins 1 & 2 closed   Pins 1 & 2 closed

        20MHz          Pins 1 & 2 closed   Pins 2 & 3 closed

        25MHz          Pins 2 & 3 closed   Pins 2 & 3 closed