KOUWELL ELECTRONIC CORPORATION

KW-420C

Processor         80486SX/80486DX
Processor Speed   20/25/33MHz
Chip Set          OPTI
Max. Onboard DRAM 40MB
Cache             64/256KB
BIOS              AMI
Dimensions        331mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            J11       Turbo LED                 JP11

  Power LED & keylock         J20       Reset switch               SW1

  Speaker                     J21       Turbo switch               SW2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             JP1           pins 2 & 3
      (internal battery)                                      closed

      CMOS memory clear                        JP1           pins 1 & 2
                                                              closed

      CMOS memory normal operation             JP1             Open
      (external battery)

  »   Monitor type select monochrome           JP2             Open

      Monitor type select color                JP2            Closed

  »   Factory configured - do not              JP6             Open
      alter.

  »   Factory configured - do not              JP7           pins 2 & 3
      alter.                                                  closed

                            DRAM CONFIGURATION

   Size         Bank 0         Bank 1          Bank 2          Bank 3

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

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

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

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

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

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

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

   16MB       (4) 4M x 9        NONE            NONE            NONE

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

   24MB       (4) 4M x 9     (4) 1M x 9      (1) 1M x 36        NONE

   28MB       (4) 4M x 9     (4) 1M x 9      (1) 1M x 36    (1) 1M x 36

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

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

   40MB       (4) 4M x 9     (4) 4M x 9      (1) 1M x 36    (1) 1M x 36

                            CACHE CONFIGURATION

       Size              Bank 0           TAG (U34)      Dirty bit (U46)

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

       256KB          (8) 32K x 8        (1) 32K x 8       (1) 64K x 1

           CACHE JUMPER CONFIGURATION

   Size      JP8       JP9      JP10      JP12

   64KB     Open      Open      Open      Open

  256KB     Open     Closed    Closed    Closed

                          CPU TYPE CONFIGURATION

       Type               JP3               JP4                JP5

      80486SX             Open              Open            pins 2 & 3
                                                             closed

      80486DX          pins 2 & 3          Closed           pins 1 & 2
                         closed                              closed