
NORTHGATE COMPUTER SYSTEMS, INC.

386/486/486SX (386 BOARD)

Processor         80386DX
Processor Speed   25/33/40MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64KB
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

  External               J10         Reset switch           J23 pins 9 &
  battery                                                        19

  Speaker           J23 pins 1 - 4   Power LED & Keylock    J23 pins 11 -
                                                                 15

  Turbo switch       J23 pins 7 &    32-bit external             S1
                          17         memory card

  Turbo LED          J23 pins 8 &
                          18

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome           JP1             Open

      Monitor type select color                JP1            Closed

     Battery type select internal             JP2           pins 2 & 3
                                                              closed

      Battery type select external             JP2           pins 1 & 2
                                                              closed

     Factory configured - do not alter        JP3             Open

     Factory configured - do not alter        JP4              N/A

     Factory configured - do not alter        JP9              N/A

     Factory configured - do not alter       JP12              N/A

              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

                            CACHE CONFIGURATION

       Size             Bank 0              TAG             Dirty Bit

       64KB           (8) 8K x 8        (2) 4K x 4         (1) 16K x 1

  Note:The cache, TAG, and dirty bit chip locations and sizes are
  unidentified.

