
MICROMEDIA TECHNOLOGIES, INC.

486-S

Processor         80486SX/80486DX/80486DX2
Processor Speed   20/25/33/50(internal)MHz
Chip Set          SIS
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        230mm x 218mm
I/O Options       None
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         CN1      Turbo LED                   CN4

  Speaker                     CN2      Reset switch                CN5

  Turbo switch                CN3      External battery            CN6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation            JP10          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP10          pins 2 & 3
                                                              closed

     Monitor type select color               JP13            Closed

      Monitor type select monochrome          JP13             Open

     Power good signal detect from           JP17          pins 1 & 2
      board                                                   closed

      Power good signal detect from           JP17          pins 2 & 3
      power supply                                            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

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

      16MB        (4) 4M x 9         NONE

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

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

                        CACHE JUMPER CONFIGURATION

  Size     JP1    JP2    JP3    JP4     JP5    JP6    JP7    JP8     JP9

  32KB     1 &    1 &     1 &    1 &    1 &    1 &     1 &    1 &   1 & 2
            2      2      2      2       2      2      2      2

  64KB     1 &    1 &     2 &    2 &    1 &    1 &     1 &    2 &   2 & 3
            2      2      3      3       2      2      2      3

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

  256KB    2 &    2 &     2 &    2 &    2 &    2 &     2 &    2 &   2 & 3
            3      3      3      3       3      3      3      3

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type              JP14              JP15               JP16

      80486SX            Open            pins 2 & 3         pins 2 & 3
                                          closed             closed

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

      80486DX           Closed           pins 1 & 2         pins 1 & 2
                                          closed             closed

