
BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1425/33/40/50 UIV

Processor  80486SX/CX486M6/CX486M7/AMD486DXL/80486DX/80486DX2/80486DX4/
           P24D/Pentium Overdrive
Processor  25/33/40/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       64MB
Onboard
DRAM
Cache      64/128/256KB
BIOS       AMI/Award
Dimensions 254mm x 220mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  External battery          JP8       Turbo switch               JP15E

  Speaker                  JP15A      +5vDC                      JP15F

  Power LED & keylock      JP15B      Green PC LED                JP24

  Turbo LED                JP15C      Green PC connector          JP25

  Reset switch             JP15D      32-bit VESA local bus    SL1 - SL3
                                      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             JP31             Open
      alter

     Factory configured - do not             JP32             Open
      alter

                        DRAM CONFIGURATION

      Size           Bank 0/2         Bank 1/3         Bank 2

       1MB             NONE             NONE        (4) 256K x 9

       1MB        (1) 256K x 36         NONE            NONE

       1MB             NONE        (1) 256K x 36        NONE

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

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

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

       2MB        (1) 512K x 36         NONE            NONE

       2MB             NONE        (1) 512K x 36        NONE

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

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

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

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

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

       4MB             NONE             NONE         (4) 1M x 9

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

       4MB         (1) 1M x 36          NONE            NONE

       4MB             NONE         (1) 1M x 36         NONE

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

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

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

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

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

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

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

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

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

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

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

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

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

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

       8MB         (1) 2M x 36          NONE            NONE

       8MB             NONE         (1) 2M x 36         NONE

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

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

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

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

                    DRAM CONFIGURATION (CONT)

      Size           Bank 0/2         Bank 1/3         Bank 2

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

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

      16MB         (1) 1M x 36      (1) 2M x 36      (4) 1M x 9

      16MB         (1) 2M x 36      (1) 1M x 36      (4) 1M x 9

      16MB             NONE             NONE         (4) 4M x 9

      16MB         (1) 4M x 36          NONE            NONE

      16MB             NONE         (1) 4M x 36         NONE

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

      32MB         (1) 8M x 36          NONE            NONE

      32MB             NONE         (1) 8M x 36         NONE

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

                    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

       UMC486              2 & 3             2 & 3             2 & 3

       CX486M6        1 & 2, 3 & 4, 5   1 & 2, 3 & 4, 5        2 & 3
                            & 6               & 6

       80486SX             Open              2 & 3             2 & 3

       CX486M7        1 & 2, 3 & 4, 5   1 & 2, 3 & 4, 5    1 & 2, 3 & 4
                            & 6               & 6

      AMD486DXL            2 & 3             2 & 3         1 & 2, 3 & 4

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

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

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

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

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

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

       Type            JP17          JP18         JP19          JP35

      UMC486           3 & 4        1 & 2         Open         Closed

      CX486M6          Open       2 & 3, 4 &   2 & 3, 4 &       Open
                                      5            5

      80486SX          Open          Open         Open         Closed

      CX486M7          1 & 2      2 & 3, 4 &     2 & 3          Open
                                      5

     AMD486DXL       1 & 2, 3 &     1 & 2         Open         Closed
                         4

      80486DX          1 & 2         Open         Open         Closed

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

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

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

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

  Note: Pins designated should be in the closed position.

          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

  100iMHz    Closed     Closed    Closed

                         CPU VOLTAGE CONFIGURATION

     Voltage             JP14               JP16               JP27

   3.45v (DX4)         pins 1 & 2        pins 1 & 2         pins 1 & 2
                        closed             closed             closed

       5.0v            pins 2 & 3        pins 2 & 3         pins 2 & 3
                        closed             closed             closed

  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

