
PEAKTRON COMPUTER, INC.

PA386SX-SMT-16/20/25

PA286-SMT-12/16/20/25

Processor         80286/80386SX
Processor Speed   12/16/20/25MHz
Chip Set          Peaktron
Max. Onboard DRAM 16MB
Cache             None
BIOS              AMI
Dimensions        248mm x 218mm
I/O Options       None
NPU Options       80287/80387

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                 Location

  Reset switch              J1         Speaker                    J4

  Turbo switch              J2         Power LED & Keylock        J5

  Turbo LED                 J3         External battery          JP1

  Note:Motherboard is supplied with either an 80386SX & 80387SX socket or
  an 80286 & 80287 socket.

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     Monitor type select                     J7                open
      monochrome

      Monitor type select color               J7               closed

     NPU mode select synchronous            J11             pins 2 & 3
      with OSC1                                                closed

      NPU mode select synchronous            J11             pins 1 & 2
      with oscillator at U49                                   closed

      Bus speed select ATCLK/2              SW1/1               Off

      Bus speed select ATCLK/3              SW1/1                On

     Parity check enabled                  SW1/2                On

      Parity check disabled                 SW1/2               Off

     Shadow ram disabled                   SW1/4                On

      Shadow ram enabled                    SW1/4               Off

  Note:Socket at U49 may not be available on all boards.

  If 8 bit SIMM/SIPPs are used, SW1/switch 2 must be open, otherwise it
  must be closed.

                            DRAM CONFIGURATION

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

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

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

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

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

  1.5MB      (4)         (4)       (2)      NONE      NONE        NONE
            44256      44256      256K x
                                    9

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

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

   3MB       (4)         (4)      (2) 1M    NONE      NONE        NONE
            44256      44256       x 9

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

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

   5MB       (4)         (4)      (2) 1M   (2) 1M     NONE        NONE
            44256      44256       x 9      x 9

   6MB       (4)         (4)      (2) 1M    NONE      NONE        NONE
           441000      441000      x 9

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

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

               DRAM JUMPER/SWITCH CONFIGURATION

  Size      J8       J9     SW1/5    SW1/6    SW1/7    SW1/8

  512KB    2 & 3   1 & 2     Off       On      Off      Off

  512KB    1 & 2   2 & 3     Off       On      Off      Off

   1MB     2 & 3   1 & 2     Off       On      Off      On

   1MB     1 & 2   2 & 3     Off       On      Off      On

  1.5MB    2 & 3   1 & 2     Off      Off       On      Off

   2MB     2 & 3   1 & 2      On      Off      Off      Off

   2MB     1 & 2   2 & 3      On      Off      Off      Off

   3MB     2 & 3   1 & 2     Off       On       On      On

   4MB     2 & 3   1 & 2      On      Off      Off      On

   4MB     1 & 2   2 & 3      On      Off      Off      On

   5MB     2 & 3   1 & 2     Off       On       On      On

   6MB     2 & 3   1 & 2      On      Off       On      Off

   8MB     1 & 2   2 & 3      On       On      Off      Off

  16MB     1 & 2   2 & 3      On       On      Off      On

  Note:Pins designated should be in the closed position.

                      BIOS CONFIGURATION

        Size                 J10                  J12

        27256          pins 1 & 2 closed          Open

        27512          pins 2 & 3 closed         Closed

