
BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB 1433/1450AEA-P

Processor        80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  20/25/33/50(internal)/50/66(internal)MHz
Chip Set         VLSI
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       230mm x 218mm
I/O Options      None
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     J1       Turbo switch                J5

  Power LED & keylock         J2       5v DC ground                J6

  Turbo LED                   J3       External battery            JP8

  Reset switch                J4

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

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

     Tag RAM size select 7- bit              JP6           pins 1 & 2
                                                              closed

      Tag RAM size select 8- bit              JP6           pins 2 & 3
                                                              closed

     Battery type select RTC 146818          JP11             Open

      Battery type select Dallas 1287         JP11            Closed

     Monitor type select monochrome          JP14          pins 1 & 2
                                                              closed

      Monitor type select color               JP14          pins 2 & 3
                                                              closed

     CMOS memory normal operation            JP16          pins 2 & 3
                                                              closed

      CMOS memory clear                       JP16          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) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

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

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

                    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      (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, 3 & 4        pins 2 & 3 closed
                                 closed

         256KB           pins 1 & 2, 3 & 4, 5 &      pins 1 & 2 closed
                                6 closed

                    CPU TYPE CONFIGURATION

        Type                 JP13                 JP20

       80486SX               Open          pins 1 & 2 closed

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

     80486DX/DX2       pins 2 & 3 closed   pins 2 & 3 closed

      Overdrive        pins 1 & 2 closed   pins 2 & 3 closed

                        CPU SPEED CONFIGURATION

         Speed                    JP5                    JP10

       80486DX-50          pins 1 & 2 closed            Closed

  All other CPU speeds     pins 2 & 3 closed             Open

