UNIDENTIFIED

NKC-486P

Processor         80486SX/80487SX/80486DX
Processor Speed   16/20/33/50MHz
Chip Set          OPTI
Max. Onboard DRAM 64MB
Cache             64/128/256/512KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            JP1       Turbo switch              JP16

  Power LED & keylock         JP9       Turbo LED                 JP17

  Reset switch                JP12      Speaker                   JP18

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Battery type select internal            JP1           pins 2 & 3
                                                              closed

      Battery type select external            JP1             Closed

  »   CMOS memory normal operation            JP2           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP2           pins 2 & 3
                                                              closed

  »   Monitor type select color               JP3             Closed

      Monitor type select monochrome          JP3              Open

  »   I/O bus speed select ATCLK/4            JP10            Closed

      I/O bus speed select ATCLK/6            JP10             Open

  »   CPU speed select OSC                    JP11          pins 1 & 2
                                                              closed

      CPU speed select OSC/2                  JP11          pins 2 & 3
                                                              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

     6MB        (4) 256K x 9   (4) 256K x 9    (4) 1M x 9        NONE

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

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

     10MB       (4) 256K x 9   (4) 256K x 9    (4) 1M x 9     (4) 1M x 9

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

     13MB       (4) 256K x 9    (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     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

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

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

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

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

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

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

     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

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

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

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

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

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

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

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

                     DRAM CONFIGURATION (CON’T)

    Size         Bank 0       Bank 1        Bank 2        Bank 3

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

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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (8) 8K x 8        NONE       (1) 8K x 8

     128KB       (8) 8K x 8     (8) 8K x 8    (1) 8K x 8

     256KB      (8) 32K x 8        NONE       (1) 32K x 8

     512KB      (8) 32K x 8    (8) 32K x 8    (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

   Size          JP4         JP5          JP6         JP7         JP8

   64KB       pins 2 & 3     Open        Open        Open         Open
               closed

   128KB      pins 2 & 3    Closed      Closed       Open         Open
               closed

   256KB      pins 2 & 3    Closed      Closed      Closed        Open
               closed

   512KB      pins 1 & 2    Closed      Closed      Closed       Closed
               closed

                          CPU TYPE CONFIGURATION

       Type               JP13              JP14               JP15

      80486SX             Open            pins 1 & 2           Open
                                           closed

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

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