
NORTHGATE COMPUTER SYSTEMS, INC.

SLIMLINE CACHE 386SX

Processor               80386SX
Processor Speed         16/20MHz
Chip Set                VLSI
Max. Onboard DRAM       8MB
Cache                   64KB
BIOS                    AMI
Dimensions              330mm x 218mm
I/O Options             Floppy drive interface, IDE interface, parallel
                        port, serial ports (2), VGA port
NPU Options             80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  VGA port                    J1       Serial port 2               J10

  Turbo LED                   J3       Parallel port LPT1          J15

  Power LED & keylock         J4       Floppy drive interface      J16

  Speaker                     J5       IDE interface               J17

  Reset switch                J6       Riser card                  R1

  IDE interface LED           J8       Turbo switch                W6

  Serial port 1               J9

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper          Position

     Factory configured - do not           SW1/1 & 2           Open
      alter

     Factory configured - do not           SW2/3 & 4           Open
      alter

     Factory configured - do not            SW21 & 2            N/A
      alter

     Floppy drive interface interrupt     SW2/pins 11 &        Open
      (IRQ6) enabled                            12

      Floppy drive interface interrupt     SW2/pins 11 &       Closed
      (IRQ6) disabled                           12

     Floppy drive interface DMARQ2        SW2/pins 13 &        Open
      enabled                                   14

      Floppy drive interface DMARQ2        SW2/pins 13 &       Closed
      disabled                                  14

     Floppy drive interface DACK2         SW2/pins 15 &        Open
      enabled                                   16

      Floppy drive interface DACK2         SW2/pins 15 &       Closed
      disabled                                  16

     Floppy drive interface enabled      SW3/pins 1 & 2        Open

      Floppy drive interface disabled     SW3/pins 1 & 2       Closed

     Factory configured - do not         SW3/pins 5 & 6        Open
      alter

     Factory configured - do not               W1             Closed
      alter

     Cache enabled                             W2             Closed

      Cache disabled                            W2              Open

     Memory (8-bit) speed select 4             W3            pins 2 & 3
      wait states                                              closed

      Memory (8-bit) speed select 6             W3            pins 1 & 2
      wait states                                              closed

     Memory (16-bit) speed select 1            W4            pins 2 & 3
      wait states                                              closed

      Memory (16-bit) speed select 2            W4            pins 1 & 2
      wait states                                              closed

     BIOS type select 27256                    W5            pins 2 & 3
                                                               closed

      BIOS type select 27512                    W5            pins 1 & 2
                                                               closed

      Monitor type select monochrome            W7            pins 1 & 2
                                                               closed

      Monitor type select color                 W7            pins 2 & 3
                                                               closed

     Parallel port (J2) mode select           W11            pins 2 & 3
      output only                                              closed

      Parallel port (J2) mode select           W11            pins 1 & 2
      bi-directional                                           closed

     Floppy drive write precomp               W17            pins 2 & 3
      select standard                                          closed

      Floppy drive write precomp               W17            pins 1 & 2
      select two speed drive                                   closed

     Floppy drive type select                 W18            pins 1 & 2
      standard                                                 closed

      Floppy drive type select two             W18            pins 2 & 3
      speed drive                                              closed

     IDE interface enabled                    W20              Open

      IDE interface disabled                   W20             Closed

     IDE interface interrupt (IRQ4)           W21              Open
      enabled

      IDE interface interrupt disabled         W21             Closed

                            DRAM CONFIGURATION

   Size      Bank 0    Bank 1     Bank 2   Bank 3     Socket      Socket
                                                       U71         U76

   512KB       (2)      NONE      NONE      NONE      PAL B       PAL B
             256K x
               9

    1MB        (2)       (2)      NONE      NONE      PAL B       PAL B
             256K x     256K x
               9          9

    2MB      (2) 1M     NONE      NONE      NONE      PAL A       PAL A
              x 9

    3MB        (2)       (2)      (2) 1M    NONE      PAL B       PAL B
             256K x     256K x     x 9
               9          9

    4MB      (2) 1M     (2) 1M    NONE      NONE      PAL A       PAL A
              x 9        x 9

    5MB        (2)       (2)      (2) 1M   (2) 1M     PAL B       PAL B
             256K x     256K x     x 9      x 9
               9          9

    6MB      (2) 1M     (2) 1M    (2) 1M    NONE      PAL A       PAL A
              x 9        x 9       x 9

    8MB      (2) 1M     (2) 1M    (2) 1M   (2) 1M     PAL A       PAL A
              x 9        x 9       x 9      x 9

                     DRAM JUMPER/SWITCH CONFIGURATION

   Size     SW1/5 & 6   SW1/7 & 8    SW1/9 &        W8            W9
                                       10

  512KB       Open        Open        Open       pins 1 & 2    pins 2 & 3
                                                  closed        closed

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

   2MB       Closed       Open        Open       pins 1 & 2    pins 1 & 2
                                                  closed        closed

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

   4MB        Open        Open        Open       pins 1 & 2    pins 1 & 2
                                                  closed        closed

   5MB        Open       Closed       Open       pins 1 & 2    pins 2 & 3
                                                  closed        closed

   6MB       Closed       Open        Open       pins 1 & 2    pins 1 & 2
                                                  closed        closed

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

  Note:DRAM jumper configurations correlate directly to memory
  configurations.

             CACHE CONFIGURATION

     Size          Bank 0           TAG

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

  Note:Arrangement of Cache/TAG unverified.

                        PARALLEL PORT CONFIGURATION

    LPT#      Interrupt   Address   SW2/7 &   SW2/9 &   SW3/9 &    SW3/11
                                       8        10        10       & 12

    LPT1        IRQ7       378h      Open     Closed     Open      Open

    LPT1        IRQ7       3BCh      Open     Closed     Open     Closed

    LPT2        IRQ5       278h     Closed     Open     Closed     Open

  Disabled      N/A         N/A      Open      Open     Closed    Closed

      SERIAL PORT 1 CONFIGURATION

   Setting     SW2/3 & 4    SW3/3 & 4

  COM2/IRQ3     Closed        Open

  Disabled       Open        Closed

     SERIAL PORT 2 CONFIGURATION

   Setting     SW2/5 &6    SW3/7 & 8

  COM1/IRQ4     Closed       Open

  Disabled       Open       Closed

                       ON BOARD VIDEO CONFIGURATION

                Size                                  SW5

               Enabled                  pins 1 & 2, 3 & 4, 5 & 6 closed &
                                                pins 7 & 8 open

              Disabled                   pins 1 & 2, 3 & 4, 5 & 6 open &
                                               pins 7 & 8 closed

