
BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1425AEA-V, MB-1433AEA-V, MB-1440AEA-V, MB-1450AEA-V

Processor        80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         Advanced
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       254mm x 218mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  External battery          JP8       Turbo switch               JP15E

  Speaker                  JP15A      5V ground connector        JP15F

  Power LED & keylock      JP15B      32-bit VESA Local bus        S1
                                      slot

  Turbo LED                JP15C      32-bit VESA Local bus        S2
                                      slot

  Reset switch             JP15D

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not alter        J01              N/A

     Factory configured - do not alter        JP4           pins 2 & 3
                                                              closed

      7 Bit TAG RAM installed                  JP6           pins 1 & 2
                                                              closed

      8 Bit TAG RAM installed                  JP6           pins 2 & 3
                                                              closed

      Dallas Real time clock 1287             JP11            Closed
      installed

      Battery & Real time clock 146818        JP11             Open
      installed

     Monitor type select color               JP14           pins 2 & 3
                                                              closed

      Monitor type select monochrome          JP14           pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP16           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP16           pins 1 & 2
                                                              closed

     CPU PQFP installed                      JP22           pins 1 & 2
                                                              closed

      CPU PGA installed                       JP22           pins 2 & 3
                                                              closed

     VESA bus clock asynchronous mode        JP26           pins 1 & 2
                                                              closed

      VESA bus clock synchronous mode         JP26           pins 2 & 3
                                                              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) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

      20MB        (4) 1M x 9      (4) 4M x 9

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

                            CACHE CONFIGURATION

     Size        Max Cachable      Bank 0        Bank 1          TAG

     64KB             8MB        (4) 8K x 8    (4) 8K x 8     (1) 8K x 8

     128KB           16MB        (4) 32K x 8      NONE        (1) 8K x 8

     256KB           32MB        (4) 32K x 8   (4) 32K x 8    (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

         Size                    JP12                      JP19

         64KB                    Open                pins 1 & 2 closed

         128KB            pins 1 & 2 and 3 & 4       pins 2 & 3 closed
                                closed

         256KB                  Closed               pins 1 & 2 closed

                    CPU TYPE CONFIGURATION

        Type                 JP13                 JP20

       80486SX               Open          pins 1 & 2 closed

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

       80486DX         pins 2 & 3 closed   pins 2 & 3 closed

      ODP486SX         pins 1 & 2 closed   pins 2 & 3 closed

      80486DX2         pins 2 & 3 closed   pins 2 & 3 closed

                          CPU SPEED CONFIGURATION

    Speed           JP5            JP10          JP23            JP24

    25MHz        pins 2 & 3        Open          Open            Open
                  closed

    33MHz        pins 2 & 3        Open         Closed           Open
                  closed

    40MHz        pins 1 & 2       Closed         Open           Closed
                  closed

   50i MHz       pins 2 & 3        Open          Open            Open
                  closed

    50MHz        pins 1 & 2       Closed         Open            Open
                  closed

   66i MHz       pins 2 & 3        Open         Closed           Open
                  closed

      VESA WAIT STATE CONFIGURATION

     Wait states             J02

    0 wait states     pins 1 & 2 closed

    1 wait state      pins 2 & 3 closed

