
BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1425/1433/1440/1450UHT VER. 3 & ABOVE

Processor  CX486M6/80486SX/CX486M7/UMC486/80486DX/80486DX2/80486DX4/ Pentium
           Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       128MB
Onboard
DRAM
Cache      128/256/512/1024KB
BIOS       Award
Dimensions 330mm x 218mm
I/O        32-bit VESA local bus slots (2), 32-bit PCI slots (3)
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose               Location       Purpose               Location

  External battery         JP8         Turbo switch       JP15 (pins 14 -
                                                                15)

  Speaker             JP15 (pins 1 -   +5v ground         JP15 (pins 17 -
                           4)                                   18)

  Power LED &         JP15 (pins 5 -   32-bit PCI slots      PC1 - PC3
  keylock                  9)

  Turbo LED          JP15 (pins 10 -   32-bit VESA           SL1 & SL2
                           11)         local bus slots

  Reset switch       JP15 (pins 12 -
                           13)

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     CMOS memory normal operation             JP8             Open

      CMOS memory clear                        JP8           pins 3 & 4
                                                              closed

      Battery type select external             JP8            Closed

     Power good signal detect from            JP10          pins 1 & 2
      power supply                                            closed

      Power good signal detect from            JP10          pins 2 & 3
      board                                                   closed

     Password select normal                   JP16            Open

      Password select clear                    JP16           Closed

     Factory configured - do not alter        JP23            Open

     Factory configured - do not alter        JP24            Open

     Factory configured - do not alter        JP25            Open

     Factory configured - do not alter        JP30            Open

     Factory configured - do not alter        JP31            Open

     Factory configured - do not alter        JP32            Open

     Hardware management select normal        JP40            Open
      operation

      Hardware management select trigger       JP40           Closed
      for SMM mode

     Cyrix CPU clock speed select 2x          JP43            Open

      Cyrix CPU clock speed select 1x          JP43           Closed

     CPU type select all                      JP60            Open

      CPU type select AMD 80486DX2-66/80       JP60           Closed
      only

  Note: The location of JP60 is unidentified.

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       2MB         (4) 512K x 9         NONE            NONE

       2MB             NONE        (1) 512K x 36        NONE

       2MB             NONE             NONE        (1) 512K x 36

       4MB          (4) 1M x 9          NONE            NONE

       4MB             NONE        (1) 512K x 36    (1) 512K x 36

       4MB             NONE         (1) 1M x 36         NONE

       4MB             NONE             NONE            NONE

       6MB          (4) 1M x 9      (1) 512 x 36        NONE

       6MB          (4) 1M x 9          NONE        (1) 512 x 36

       8MB          (4) 1M x 9     (1) 512K x 36    (1) 512K x 36

       8MB          (4) 1M x 9      (1) 1M x 36         NONE

       8MB          (4) 1M x 9          NONE         (1) 1M x 36

       8MB             NONE         (1) 1M x 36      (1) 1M x 36

       8MB             NONE         (1) 2M x 36         NONE

       8MB             NONE             NONE         (1) 2M x 36

      16MB          (4) 4M x 9          NONE            NONE

      16MB             NONE         (1) 2M x 36      (1) 2M x 36

      16MB             NONE         (1) 4M x 36         NONE

      16MB             NONE             NONE         (1) 4M x 36

      24MB          (4) 4M x 9      (1) 1M x 36      (1) 1M x 36

                DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1        Bank 2

     24MB        (4) 4M x 9    (1) 2M x 36       NONE

     24MB        (4) 4M x 9        NONE       (1) 2M x 36

     32MB        (4) 4M x 9    (1) 2M x 36    (1) 2M x 36

     32MB        (4) 4M x 9    (1) 4M x 36       NONE

     32MB        (4) 4M x 9        NONE       (1) 4M x 36

     32MB        (4) 8M x 9        NONE          NONE

     32MB           NONE       (1) 4M x 36    (1) 4M x 36

     32MB           NONE       (1) 8M x 36       NONE

     32MB           NONE           NONE       (1) 8M x 36

     64MB       (4) 16M x 9        NONE          NONE

     64MB           NONE       (1) 8M x 36    (1) 8M x 36

     128MB      (4) 16M x 9    (1) 8M x 36    (1) 8M x 36

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

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

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

     512KB        (4) 64K x 8     (4) 64K x 8    (1) 32K x 8

      1MB        (4) 128K x 8    (4) 128K x 8    (1) 64K x 8

                        CACHE JUMPER CONFIGURATION

     Size           JP22            JP34          JP35           JP36

    128KB           1 & 2           Open          1 & 2         2 & 3

    256KB       1 & 2, 3 & 4        Open          2 & 3         1 & 2

    512KB      1 & 2, 3 & 4, 5      3 & 4         2 & 3         1 & 2
                     & 6

     1MB       1 & 2, 3 & 4, 5    1 & 2, 3 &      2 & 3         1 & 2
                 & 6, 7 & 8           4

  Note: Pins designated should be in the closed position.

                    CPU TYPE CONFIGURATION

        Type                 JP19                 JP20

         AMD           pins 2 & 3 closed   pins 1 & 2 closed

        Cyrix          pins 1 & 2 closed   pins 2 & 3 closed

        Intel          pins 1 & 2 closed   pins 1 & 2 closed

                          CPU TYPE CONFIGURATION

       Type          JP37        JP38       JP39       JP41       JP42

     CX486M6        1 & 2, 3   1 & 2, 3    3 & 4      2 & 3       2 & 3
                      & 4        & 4

      AM486          Open       2 & 3      1 & 2      1 & 2       Open

     80486SX         Open       2 & 3      1 & 2       Open       Open

     CX486M7        1 & 2, 3   1 & 2, 3    3 & 4      2 & 3       2 & 3
                      & 4        & 4

      UMC486         Open       2 & 3      1 & 2      1 & 2       Open

     SL80486        1 & 2, 3   1 & 2, 3    3 & 4      2 & 3       2 & 3
                      & 4        & 4

     80486DX         Open      1 & 2, 3    1 & 2      2 & 3       Open
                                 & 4

     80486DX2        Open      1 & 2, 3    1 & 2      2 & 3       Open
                                 & 4

     80486DX4       2 & 3, 4   1 & 2, 3    3 & 4      2 & 3      1 & 2, 3
                      & 5        & 4                               & 4

      Pentium       2 & 3, 4   1 & 2, 3   3 & 4, 5    2 & 3       1 & 2
    Overdrive         & 5        & 4        & 6

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

      Type            JP44          JP45          JP46           JP47

     CX486M6       pins 2 & 3     pins 1 & 2    pins 1 & 2    pins 1 & 2
                     closed        closed        closed         closed

      AM486           Open        pins 2 & 3    pins 3 & 4       Open
                                   closed        closed

     80486SX          Open          Open          Open           Open

     CX486M7       pins 2 & 3     pins 1 & 2    pins 1 & 2    pins 1 & 2
                     closed        closed        closed         closed

     UMC486           Open        pins 2 & 3    pins 3 & 4       Open
                                   closed        closed

     SL80486          Open        pins 1 & 2      Open           Open
                                   closed

     80486DX          Open          Open          Open           Open

    80486DX2          Open          Open          Open           Open

    80486DX4       pins 3 & 4     pins 1 & 2      Open           Open
                     closed        closed

     Pentium       pins 1 & 2     pins 1 & 2    pins 2 & 3    pins 2 & 3
    Overdrive        closed        closed        closed         closed

                       CPU SPEED CONFIGURATION

               Speed                              JP33

               25MHz                       pins 1 & 2 closed

               33MHz                pins 1 & 2, 3 & 4, 5 & 6 closed

               40MHz                    pins 1 & 2, 3 & 4 closed

              50iMHz                       pins 1 & 2 closed

               50MHz                       pins 5 & 6 closed

              66iMHz                pins 1 & 2, 3 & 4, 5 & 6 closed

              75iMHz                       pins 1 & 2 closed

              100iMHz               pins 1 & 2, 3 & 4, 5 & 6 closed

         CPU CLOCK CONFIGURATION

        Speed                JP48

         2x           pins 2 & 3 closed

        2.5x          pins 1 & 2 closed

         3x                  Open

                         CPU VOLTAGE CONFIGURATION

   Voltage        JP29         JP49        JP50       JP51        JP52

    3.3v          Open         Open        Open      Closed      Closed

     5v        pins 1 & 2,    Closed      Closed      Open        Open
               3 & 4 closed

  VESA WAIT STATE CONFIGURATION

   Wait states         JP53

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP54

   <= 33MHz        Open

   > 33MHz        Closed

