KOUWELL ELECTRONIC CORPORATION

KW-420B

Processor         80486DX
Processor Speed   33MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        331mm x 218mm
I/O Options       32-bit external memory card slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  External battery           J10       32-bit external             S1
                                       memory card

  Power LED & keylock        J23       Reset switch               SW1

  Speaker                    J24       Turbo switch               SW2

  Turbo LED                 JP12

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select monochrome           JP1             Open

      Monitor type select color                JP1            Closed

  »   CMOS memory normal operation             JP2           pins 2 & 3
      (internal battery)                                      closed

      CMOS memory clear                        JP2           pins 1 & 2
                                                              closed

      CMOS memory normal operation             JP2             Open
      (external battery)

  »   Bus speed select ATCLK/4                 JP3             Open

      Bus speed select ATCLK/6                 JP3            Closed

  »   Factory configured - do not alter        JP4              N/A

  »   Factory configured - do not alter        JP5              N/A

  »   Factory configured - do not alter        JP6              N/A

  »   Factory configured - do not alter        JP7              N/A

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

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

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

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

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

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

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

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

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

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

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

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

     48MB        (4) 4M x 9    (4) 4M x 9     (4) 4M x 9        NONE

     52MB        (4) 1M x 9    (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

     64MB        (4) 4M x 9    (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

  Note:Banks 2 and 3 are used when 32-bit external memory card is
  installed at S1.

                            CACHE CONFIGURATION

       Size              Bank 0           TAG (U34)      Dirty Bit (U33)

       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      JP11

   64KB     Open      Open      Open      Open

  256KB    Closed    Closed     Open     Closed