
NORTHGATE COMPUTER SYSTEMS, INC.

386 ELEGANCE

Processor         80386DX
Processor Speed   20/25MHz
Chip Set          OPTI
Max. Onboard DRAM 8MB
Cache             64/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card slot
NPU Options       80387/3167

[Image]

                                CONNECTIONS

  Purpose              Location      Purpose                  Location

  Turbo LED               J3         Reset switch                J6

  Power LED &             J4         32-bit external             S1
  keylock                            memory card

  Speaker                 J5         Turbo switch                W6

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Factory configured - do not alter         W1           pins 2 & 3
      (Rev. B that has jumper W10)                            closed

     Factory configured - do not alter         W1             Open
      (Rev. Bs without jumper W10)

     DRAM (8-bit) speed select 20MHz           W4           pins 2 & 3
      CPU                                                     closed

      DRAM (8-bit) speed select 25MHz           W4           pins 1 & 2
      CPU                                                     closed

     DRAM (16-bit) speed select 20MHz          W5           pins 2 & 3
      CPU                                                     closed

      DRAM (16-bit) speed select 25MHz          W5           pins 1 & 2
      CPU                                                     closed

     Monitor type select monochrome            W7           pins 1 & 2
                                                              closed

      Monitor type select color                 W7           pins 2 & 3
                                                              closed

     Factory configured - do not alter        W10              N/A
      (some Rev. Bs only)

                            DRAM CONFIGURATION

  Size     Bank 0     Bank 1    Bank 2    Bank 3      Socket      Socket
                                                       U60         U73

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

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

   3MB       (4)        (4)       (4)      NONE       PAL B       PAL B
            256K x    256K x     256K x
              9         9          9

   4MB       (4)        (4)       (4)       (4)       PAL B       PAL B
            256K x    256K x     256K x    256K x
              9         9          9         9

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

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

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

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

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

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

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

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

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

                         DRAM JUMPER CONFIGURATION

      Size              SW1                 W8                 W9

      1MB              Open             pins 2 & 3      pins 2 & 3 closed
                                          closed

      2MB              Open             pins 2 & 3      pins 2 & 3 closed
                                          closed

      3MB            pins 1 & 2         pins 2 & 3      pins 2 & 3 closed
                      closed              closed

      4MB            pins 1 & 2         pins 2 & 3      pins 2 & 3 closed
                      closed              closed

      4MB              Open             pins 2 & 3      pins 2 & 3 closed
                                          closed

      5MB         pins 3 & 4, 7 &       pins 1 & 2      pins 1 & 2 closed
                     8 closed             closed

      6MB         pins 3 & 4, 7 &       pins 1 & 2      pins 1 & 2 closed
                     8 closed             closed

      8MB              Open             pins 1 & 2      pins 1 & 2 closed
                                          closed

      9MB            pins 1 & 2         pins 1 & 2      pins 1 & 2 closed
                      closed              closed

      10MB           pins 1 & 2         pins 1 & 2      pins 1 & 2 closed
                      closed              closed

      12MB        pins 1 & 2, 7 &       pins 1 & 2      pins 1 & 2 closed
                     8 closed             closed

      16MB             Open             pins 1 & 2      pins 1 & 2 closed
                                          closed

            CACHE CONFIGURATION

     Size          Bank 0          TAG

     64KB        (8) 64K x 1   (2) 64K x 1

     256KB       (8) 64K x 4   (2) 64K x 4

                  CACHE JUMPER CONFIGURATION

        Size                  W2                   W3

        64KB           pins 1 & 2 closed   pins 1 & 2 closed

        256KB          pins 2 & 3 closed   pins 2 & 3 closed

