
NORTHGATE COMPUTER SYSTEMS, INC.

SLIMLINE SP

Processor              80386DX/80486DX
Processor Speed        25/33MHz
Chip Set               VLSI
Max. Onboard DRAM      64MB
Cache                  64/256KB
BIOS                   AMI
Dimensions             350mm x 304mm
I/O Options            Proprietary CPU/NPU module slot, parallel port,
                       serial ports (2), floppy drive interface, IDE
                       interface, VGA port
NPU Options            80387/3167/4167 (on external CPU/NPU card)

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Proprietary CPU module      CPU1      Serial port 1              J9

  VGA port                     J1       Serial port 2              J10

  External battery             J2       Parallel port LPT1         J15

  Turbo LED                    J4       Floppy drive interface     J16

  Power LED & keylock          J5       IDE interface              J17

  Reset switch                 J6       Speaker                    J19

  IDE interface LED            J8       Riser card                 R1

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Floppy drive write precomp select         W2           pins 2 & 3
      alternate                                               closed

      Floppy drive write precomp select         W2           pins 1 & 2
      normal                                                  closed

     Factory configured - do not alter         W3              N/A

     Monitor type select monochrome            W4           pins 1 & 2
                                                              closed

      Monitor type select color                 W4           pins 2 & 3
                                                              closed

     CMOS memory normal operation              W8             Open

      CMOS memory clear                         W8            Closed

     Parallel port mode select                W13           pins 2 & 3
      bi-directional                                          closed

      Parallel port mode select input          W13           pins 1 & 2
      only                                                    closed

     Floppy drive mode select single          W18           pins 1 & 2
      speed                                                   closed

      Floppy drive mode select dual            W18           pins 2 & 3
      speed                                                   closed

     Factory configured - do not alter        W27              N/A

     Factory configured - do not alter        W29              N/A

     Factory configured - do not alter    SW1 pins 1 &         N/A
                                                2

     Factory configured - do not alter    SW1 pins 5 &         N/A
                                                6

     VGA BIOS shadowing enabled           SW1 pins 11 &      Closed
                                                12

      VGA BIOS shadowing disabled          SW1 pins 11 &       Open
                                                12

     BIOS shadowing enabled               SW1 pins 11 &      Closed
                                                12

      BIOS shadowing disabled              SW1 pins 11 &       Open
                                                12

     IRQ6 enabled                         SW2 pins 9 &       Closed
                                                10

      IRQ6 disabled                        SW2 pins 9 &        Open
                                                10

     Floppy drive interface enabled       SW3 pins 1 &        Open
                                                2

      Floppy drive interface disabled      SW3 pins 1 &       Closed
                                                2

  Note:The locations of W8 & W29 are unidentified.

              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

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

      16MB        (4) 4M x 9         NONE

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

                     DRAM JUMPER/SWITCH CONFIGURATION

       Size                SW1                W5                W6

        1MB           3 & 4, 17 & 18,        2 & 3             2 & 3
                         19 & 20

        2MB          17 & 18, 19 & 20        2 & 3             2 & 3

        4MB           3 & 4, 17 & 18         1 & 2             2 & 3

        8MB              17 & 18             1 & 2             2 & 3

       16MB               3 & 4              1 & 2             1 & 2

       32MB                Open              1 & 2             1 & 2

  Note: Pins designated should be in the closed position.

         IDE CONFIGURATION

  Setting      SW21        W20

  Enabled     Closed       Open

  Disabled     Open       Closed

     PARALLEL PORT IRQ CONFIGURATION

         IRQ                 SW2

        IRQ5          pins 5 & 6 closed

        IRQ7          pins 7 & 8 closed

               PARALLEL PORT CONFIGURATION

           Setting                       SW3

          LPT1/3BCh               pins 9 & 10 closed

          LPT1/378h                      Open

          LPT2/278h               pins 7 & 8 closed

          Disabled            pins 7 & 8, 9 & 10 closed

                 SERIAL PORT 1 CONFIGURATION

       Setting               SW2                  SW3

       Enabled         pins 1 & 2 closed          Open

      Disabled               Open          pins 5 & 6 closed

                 SERIAL PORT 2 CONFIGURATION

       Setting               SW2                  SW3

       Enabled         pins 3 & 4 closed          Open

      Disabled               Open          pins 3 & 4 closed

                            VIDEO CONFIGURATION

         Setting                    SW5                     W19

         Enabled            pins 1 & 2, 3 & 4, 5     pins 1 & 2 closed
                                & 6 closed

        Disabled                   Open              pins 2 & 3 closed

                            BIOS CONFIGURATION

                    Setting                                SW1

         F000-FFFF (VGA BIOS disabled)              pins 7 & 8, 9 & 10
                                                          closed

    F000-FFFF, E000-EFFF (VGA BIOS disabled,        pins 7 & 8 closed
            BIOS shadowing enabled)

        F000-FFFF VGA BIOS at C000-C7FF             pins 9 & 10 closed

      F000-FFFF VGA BIOS at C000-C7FF, IDE          pins 9 & 10 closed
             interface at C800-CFFF

[Image]

     CACHE CONFIGURATION

     Size          Bank 0

     64KB        (8) 8K x 8

     256KB      (8) 32K x 8

               CACHE JUMPER CONFIGURATION

            Size                        W1

            64KB                       Open

           256KB             pins 1 & 2, 3 & 4 closed

[Image]

                        USER CONFIGURABLE SETTINGS

      Setting              W3                W4                 W5

     Burst mode        pins 2 & 3         pins 2 & 3        pins 1 & 2
      enabled            closed            closed             closed

     Burst mode        pins 1 & 2         pins 1 & 2        pins 1 & 2
      enabled            closed            closed             closed

     CACHE CONFIGURATION

     Size          Bank 0

     64KB        (8) 8K x 8

     256KB      (8) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size               W1                 W2                 W5

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

      256KB          pins 2 & 3         pins 2 & 3      pins 3 & 4, 5 & 6
                       closed             closed             closed

