
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

