
JPN CORPORATION

MB386SX


Processor         80386SX
Processor Speed   16/20/25MHz
Chip Set          VLSI
Max. Onboard DRAM 4MB
Cache             None
BIOS              AMI
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       80387SX


[Image]

                              CONNECTIONS

  Purpose                  Location      Purpose           Location

  Speaker                    JP20        Turbo switch        JP52

  Power LED & keylock        JP30        Turbo LED           JP56

  Reset switch               JP51

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     Pipeline mode enabled                    JP10           closed

      Pipeline mode disabled                   JP10            open

     BIOS type select 27256                   JP23            open

                                               JP24           closed

      BIOS type select 27128                   JP23            open

                                               JP24            open

      BIOS type select 27512                   JP23           closed

                                               JP24           closed

     Parity check enabled                     JP25           closed

      Parity check disabled                    JP25            open

     Monitor type select color                JP31           closed

      Monitor type select monochrome           JP31            open

     Power good signal detect from            JP55          pins 1 & 2
      board                                                   closed

      Power good signal detect from            JP55          pins 2 & 3
      power supply                                            closed

     CMOS memory normal operation             JP58          pins 1 & 2
                                                              closed

      CMOS memory clear                        JP58          pins 3 & 4
                                                              closed

     Factory configured - do not alter        JP59             N/A

                            DRAM CONFIGURATION

  Size      Bank 0     Parity    Bank 1      Parity    Bank 2     Bank 3
                       (P-0)                 (P-1)

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

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

  1.5MB       (4)       (2)        (4)        (2)        (2)       NONE
            44256      41256      44256      41256     256K x
                                                         9

   2MB        (4)       (2)        (4)        (2)        (2)     (2) 256K
            44256      41256      44256      41256     256K x      x 9
                                                         9

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

   3MB        (4)       (2)        (4)        (2)      (2) 1M      NONE
            44256      41256      44256      41256      x 9

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

