
BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1420/1425/1433PB

MB-1420/1425/1433PV

Processor        80486SX/80487SX/80486DX/80486DX2
Processor Speed  20/25/33/50(internal)/50/66(internal)MHz
Chip Set         Unidentified
Max. Onboard DRAM32MB
Cache            None
BIOS             AMI
Dimensions       254mm x 218mm
I/O Options      None
NPU Options      4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J1       Turbo switch                JP6

  Speaker                     J2       External battery            JP8

  Turbo LED                   J3       Reset switch                SW1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color               JP5             Closed

      Monitor type select monochrome          JP5              Open

     CMOS memory normal operation            JP7           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP7           pins 1 & 2
                                                              closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

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

      4MB         (4) 1M x 9         NONE

      5MB         (4) 1M x 9     (4) 256K x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

                          CPU TYPE CONFIGURATION

       Type                JP9               JP10              JP11

      80486SX             Open            pins 2 & 3           Open
                                            closed

      80487SX           pins 2 & 3        pins 1 & 2          Closed
                         closed             closed

      80486DX           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed

     80486DX2           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed

                        KEYBOARD BIOS CONFIGURATION

     Type           JP1            JP2            JP3            JP4

    8042 (23       Closed          Open          Open            Open
     pins)

    8042 (24        Open          Closed         Open            Open
     pins)

    8042 (27        Open           Open         Closed           Open
     pins)

    8042 (30        Open           Open          Open           Closed
     pins)

