BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1420C-CH/1433C-CH

Processor         80486SX/80486DX
Processor Speed   20/33MHz
Chip Set          C & T
Max. Onboard DRAM 32MB
Cache             64/128KB
BIOS              AMI
Dimensions        327mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     J1       Turbo LED                   J4

  Power LED & keylock         J2       Turbo switch                J5

  Reset switch                J3       External battery            J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             W4            pins 2 & 3
                                                              closed

      CMOS memory clear                        W4            pins 1 & 2
                                                              closed

  »   Monitor type select color                W5             Closed

      Monitor type select monochrome           W5              Open

              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

      5MB         (4) 1M x 9     (4) 256K x 9

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

      17MB        (4) 256K x 9    (4) 4M x 9

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

      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 (U21)        TAG (U22)

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

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

  Note:Bank 0 = U8, U10, U12, & U14. With 16MB or more of DRAM, 128KB of
  cache must be installed.

        CACHE JUMPER CONFIGURATION

        Size                  W1

        64KB          pins 2 & 3 closed

        128KB         pins 1 & 2 closed

         CPU TYPE CONFIGURATION

     Type          W2            W3

  80486SX-20      Open         Closed

  80487SX-20     Closed         Open

  80486DX-33      Open          Open

                         POWER GOOD CONFIGURATION

          Type                      W6                       W7

    Signal detect from      pins 1 & 2 closed        pins 1 & 2 closed
      power supply

    Signal detect from      pins 2 & 3 closed        pins 2 & 3 closed
          board