AMERICAN DIGICOM CORPORATION

DIGIS-486NL

Processor         80486SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/50/66(internal)
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit VESA local bus slots (2)
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  External battery            J6        Turbo switch              JJ23

  Power LED & keylock         J20       Speaker                   J24

  Reset switch                J22       32-bit VESA Local bus      S1
                                        slot

  Turbo LED                   J23       32-bit VESA Local bus      S2
                                        slot

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   CMOS memory normal operation           J1              pins 2 & 3
                                                               closed

      CMOS memory clear                      J1              pins 1 & 2
                                                               closed

  »   Monitor type select color              J3                Closed

      Monitor type select                    J3                 Open
      monochrome

      CPU type select PGA                    J29               Closed

      CPU type select PQFP                   J29                Open

              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

      5MB         (4) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

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

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

                          CPU TYPE CONFIGURATION

       Type                J11               J12               J13

      80486SX           pins 1 & 2          Open            pins 2 & 3
                         closed                               closed

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

     80486DX2           pins 2 & 3         Closed           pins 1 & 2
                         closed                               closed

                          CPU SPEED CONFIGURATION

  Speed       Wait        J15        J16      J17       J25        J28
             states

  25MHz        0        Closed      Open     pins 1     Open       Open
                                              & 2

  33MHz        0         Open      Closed    pins 1     Open       Open
                                              & 2

  50i Mhz      0        Closed      Open     pins 1     Open       Open
                                              & 2

  50MHz        1        Closed      Open     pins 2    Closed     Closed
                                              & 3

  66i MHz      0         Open      Closed    pins 1     Open       Open
                                              & 2

                            CACHE CONFIGURATION

    Size      Max Cachable   Bank 0     Bank 1     TAG (U25)   TAG (U26)

    64KB          8MB         (4) 8K    (4) 8K       NONE      (1) 8K x 8
                               x 8       x 8

   128KB         16MB        (4) 32K     NONE        NONE      (1) 8K x 8
                               x 8

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

                        CACHE JUMPER CONFIGURATION

    Size           J8             J9             J10             J14

    64KB       pins 2 & 3        Open         pins 1 & 2        Open
                 closed                         closed

   128KB       pins 1 & 2       Closed        pins 2 & 3       Closed
                 closed                         closed

   256KB       pins 2 & 3       Closed        pins 1 & 2       Closed
                 closed                         closed