
BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1425/1433/1440/1450UIV (REV. 1)

Processor  CX486M6/80486SX/SL80486SX/CX486DX/AM486DX/UMC U5/80486DX/
           SL80486DX/CX486DX2/AM486DX2/80486DX2/SL80486DX2/AM486DX4/
           80486DX4/P24D/Pentium Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed      100(internal)/120(internal)MHz
Chip Set   Unidentified
Max.       64MB
Onboard
DRAM
Cache      64/128/256KB
BIOS       AMI/Award
Dimensions 254mm x 218mm
I/O        32-bit VESA local bus slots (3), floppy drive interface, green
Options    PC connector
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose              Location       Purpose                 Location

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

  Power LED &        JP15 pins 5 -    External battery          JP8
  keylock                  9

  Turbo LED          JP15 pins 10 &   Green PC LED              JP24
                          11

  Reset switch       JP15 pins 12 &   Green PC connector        JP25
                          13

  Turbo switch       JP15 pins 14 &   32-bit VESA local      SL1 - SL3
                          15          bus slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation             JP8           pins 2 & 3
                                                              closed

      CMOS memory clear                        JP8           pins 3 & 4
                                                              closed

     Factory configured - do not alter       JP31              N/A

     DS12887 normal operation                JP32             Open

      DS12887 clear                           JP32            Closed

     VESA bus slot select synchronous        JP36           pins 1 & 2
                                                              closed

      VESA bus slot select asynchronous       JP36           pins 2 & 3
                                                              closed

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB         (4) 256K x 9         NONE            NONE

       1MB             NONE        (1) 256K x 36        NONE

       1MB             NONE             NONE        (1) 256K x 36

       2MB         (4) 256K x 9    (1) 256K x 36        NONE

       2MB         (4) 256K x 9         NONE        (1) 256K x 36

       2MB             NONE        (1) 256K x 36    (1) 256K x 36

       2MB             NONE        (1) 512K x 36        NONE

       2MB             NONE             NONE        (1) 512K x 36

       3MB         (4) 256K x 9    (1) 256K x 36    (1) 256K x 36

       3MB         (4) 256K x 9         NONE        (1) 512K x 36

       3MB             NONE        (1) 256K x 36    (1) 512K x 36

       3MB             NONE        (1) 512K x 36    (1) 256K x 36

       4MB         (4) 256K x 9    (1) 256K x 36    (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         (1) 1M x 36

       5MB         (4) 256K x 9     (1) 1M x 36         NONE

       5MB         (4) 256K x 9         NONE         (1) 1M x 36

       5MB          (4) 1M x 9     (1) 256K x 36        NONE

       5MB          (4) 1M x 9          NONE        (1) 256K x 36

       5MB             NONE        (1) 256K x 36     (1) 1M x 36

       5MB             NONE         (1) 1M x 36     (1) 256K x 36

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

       6MB             NONE         (1) 1M x 36     (1) 512K x 36

       6MB             NONE        (1) 512K x 36     (1) 1M x 36

       7MB         (4) 256K x 9     (1) 1M x 36     (1) 512K x 36

       7MB          (4) 1M x 9     (1) 256K 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

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

       9MB         (4) 256K x 9     (1) 1M x 36      (1) 1M x 36

       9MB          (4) 1M x 9      (1) 1M x 36     (1) 256K x 36

       9MB          (4) 1M x 9     (1) 256K x 36     (1) 1M x 36

      10MB          (4) 1M x 9      (1) 1M x 36     (1) 512K x 36

      12MB          (4) 1M x 9      (1) 1M x 36      (1) 1M x 36

      12MB          (4) 1M x 9          NONE         (1) 2M x 36

      12MB             NONE         (1) 1M x 36      (1) 2M x 36

      12MB             NONE         (1) 2M x 36      (1) 1M x 36

      16MB          (4) 4M x 9          NONE            NONE

      16MB             NONE         (1) 4M x 36         NONE

      16MB             NONE             NONE         (1) 4M x 36

      17MB         (4) 256K x 9     (1) 4M x 36         NONE

      17MB         (4) 256K x 9         NONE         (1) 4M x 36

      17MB          (4) 4M x 9     (1) 256K x 36        NONE

      17MB          (4) 4M x 9          NONE        (1) 256K x 36

      18MB         (4) 256K x 9    (1) 256K x 36     (1) 4M x 36

      18MB         (4) 256K x 9     (1) 4M x 36     (1) 256K x 36

      19MB         (4) 256K x 9     (1) 4M x 36     (1) 512K x 36

      20MB          (4) 1M x 9      (1) 4M x 36         NONE

      20MB          (4) 1M x 9          NONE         (1) 4M x 36

      20MB          (4) 4M x 9      (1) 1M x 36         NONE

      20MB          (4) 4M x 9          NONE         (1) 1M x 36

      21MB         (4) 256K x 9     (1) 1M x 36      (1) 4M x 36

      21MB         (4) 256K x 9     (1) 4M x 36      (1) 1M x 36

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

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

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

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

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

      32MB             NONE             NONE         (1) 8M x 36

      33MB         (4) 256K x 9         NONE         (1) 8M x 36

      33MB         (4) 256K x 9     (1) 4M x 36      (1) 4M x 36

      33MB          (4) 4M x 9      (1) 4M x 36     (1) 256K x 36

      33MB          (4) 4M x 9     (1) 256K x 36     (1) 4M x 36

      34MB          (4) 4M x 9      (1) 4M x 36     (1) 512K x 36

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

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

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

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

      48MB          (4) 4M x 9      (1) 4M x 36      (1) 4M x 36

      48MB          (4) 4M x 9          NONE         (1) 8M x 36

      48MB             NONE         (1) 4M x 36      (1) 8M x 36

      48MB             NONE         (1) 8M x 36      (1) 4M x 36

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

   256KB (B)    (4) 64K x 8        NONE       (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

    Size          JP7            JP9             JP10            JP33

    64KB          Open           Open          pins 2 & 3        Open
                                                closed

    128KB         Open        pins 1 & 2       pins 1 & 2       Closed
                                closed          closed

  256KB (A)      Closed       pins 2 & 3       pins 2 & 3       Closed
                                closed          closed

  256KB (B)      Closed      pins 1 & 2, 3     pins 1 & 2       Closed
                              & 4 closed        closed

                          CPU TYPE CONFIGURATION

      Type           JP11         JP12       JP13       JP17       JP18

     CX486SX       1 & 2, 3    1 & 2, 3 &    2 & 3      Open     2 & 3, 4
                   & 4, 5 &     4, 5 & 6                           & 5
                      6

     80486SX         Open        2 & 3       2 & 3      Open       Open

    SL80486SX       1 & 2        2 & 3       2 & 3      1 & 2     5 & 6

     CX486DX       1 & 2, 3    1 & 2, 3 &    1 & 2,     1 & 2    2 & 3, 4
                   & 4, 5 &     4, 5 & 6     3 & 4                 & 5
                      6

     AM486DX         Open        2 & 3       1 & 2,     2 & 3      Open
                                             3 & 4

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

    SL80486DX      1 & 2, 4    1 & 2, 4 &    1 & 2,     1 & 2    3 & 4, 5
                     & 5           5         3 & 4                 & 6

     UMC U5S        2 & 3        2 & 3       2 & 3      3 & 4     1 & 2

    CX486DX2       1 & 2, 3    1 & 2, 3 &    1 & 2,     1 & 2    2 & 3, 4
                   & 4, 5 &     4, 5 & 6     3 & 4                 & 5
                      6

    AM486DX2         Open        2 & 3       1 & 2,     2 & 3      Open
                                             3 & 4

   SLAM486DX2       1 & 2      1 & 2, 4 &    1 & 2,     1 & 2    3 & 4, 5
                                   5         3 & 4                 & 6

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

   SL80486DX2      1 & 2, 4    1 & 2, 4 &    1 & 2,     1 & 2    3 & 4, 5
                     & 5           5         3 & 4                 & 6

    CX486DX4       1 & 2, 3    1 & 2, 3 &    1 & 2,     1 & 2    2 & 3, 4
                   & 4, 5 &     4, 5 & 6     3 & 4                 & 5
                      6

    AM486DX4         Open        2 & 3       1 & 2,     2 & 3      Open
                                             3 & 4

   SLAM486DX4       1 & 2      1 & 2, 4 &    1 & 2,     1 & 2    3 & 4, 5
                                   5         3 & 4                 & 6

    80486DX4       1 & 2, 4    1 & 2, 4 &    1 & 2,     1 & 2    3 & 4, 5
                     & 5           5         3 & 4                 & 6

      P24D         1 & 2, 4    1 & 2, 4 &    1 & 2,     1 & 2    3 & 4, 5
                     & 5           5         3 & 4                 & 6

      P24T          1 & 2        1 & 2       1 & 2,     2 & 3     5 & 6
                                             3 & 4

  Note: Pins designated should be in the closed position. All jumpers may
  not be present on all revisions.

                      CPU TYPE CONFIGURATION (CONT)

      Type          JP19       JP20      JP23        JP35         JP40

     CX486SX      2 & 3, 4     Open      Open        Open         Open
                    & 5

     80486SX        Open       Open      Open       Closed        Open

    SL80486SX     1 & 2, 3     Open      Open       Closed        Open
                    & 4

     CX486DX       2 & 3       Open      Open        Open         Open

     AM486DX        Open      1 & 2      Open       Closed        Open

     80486DX        Open       Open      Open       Closed        Open

    SL80486DX     1 & 2, 3     Open      Open        Open         Open
                    & 4

     UMC U5S        Open       Open      Open       Closed        Open

    CX486DX2       2 & 3       Open      Open        Open         Open

    AM486DX2        Open      1 & 2      Open       Closed        Open

   SL AM486DX2    1 & 2, 3     Open      Open        Open        Closed
                    & 4

    80486DX2        Open       Open      Open       Closed        Open

   SL80486DX2     1 & 2, 3     Open      Open        Open         Open
                    & 4

    CX486DX4       2 & 3       Open      Open        Open         Open

    AM486DX4        Open      1 & 2      Open       Closed        Open

   SL AM486DX4    1 & 2, 3     Open      Open        Open        Closed
                    & 4

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

      P24D        1 & 2, 3     Open      Open        Open         Open
                    & 4

      P24T        1 & 2, 3     Open      Open        Open         Open
                    & 4

  Note: Pins designated should be in the closed position. All jumpers may
  not be present on all revisions.

          CPU SPEED CONFIGURATION

   Speed      JP4        JP5        JP6

   25MHz      Open       Open     Closed

   33MHz     Closed     Closed    Closed

   40MHz      Open      Closed    Closed

  50iMHz      Open       Open     Closed

   50MHz     Closed      Open      Open

  66iMHz     Closed     Closed    Closed

  75iMHz      Open       Open     Closed

  80iMHz      Open      Closed    Closed

  100iMHz    Closed     Closed    Closed

                         CPU VOLTAGE CONFIGURATION

    Voltage       JP14        JP16        JP27       JP38         JP39

  3.3v - 3.6v     1 & 2       1 & 2      1 & 2       1 & 2        Open

      4v          1 & 2       1 & 2      1 & 2       2 & 3       Closed

      5v          2 & 3       2 & 3      2 & 3       1 & 2        Open

  Note: Pins designated should be in the closed position.

  VESA WAIT STATE CONFIGURATION

   Wait states         JP22

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP21

   <= 33MHz        Open

   > 33MHz        Closed

