
NORTHGATE COMPUTER SYSTEMS, INC.

NORTHGATE SUPERB CLT486VL2

Processor        80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         Unidentified
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       254mm x 220mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Turbo LED                  JP10      External battery           JP17

  Speaker                    JP11      Turbo switch               JP95

  Power LED & keylock        JP13      32-bit VESA local bus   SL1 & SL2
                                       slots

  Reset switch               JP15

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     PQFP CPU disabled                       JP1             Closed

      PQFP CPU enabled                        JP1              Open

     Monitor type select monochrome          JP12             Open

      Monitor type select color               JP12            Closed

     CMOS memory normal operation            JP16          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP16          pins 2 & 3
                                                              closed

  Note: The location of JP1 is unidentified. If board does not have PQFP
  CPU, JP1 will not be present.

              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

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

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 256K x 9    (4) 4M x 9

      17MB        (4) 4M x 9     (4) 256K x 9

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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

                  CACHE JUMPER CONFIGURATION

        Size                 JP7                  JP8

        64KB           pins 2 & 3 closed   pins 2 & 4 closed

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

        256KB          pins 1 & 2 closed   pins 1 & 2 closed

                       CPU SPEED/TYPE CONFIGURATION

       Type          JP2        JP3        JP4        JP33        JP72

    80486SX-25       Open      Open        Open       2 & 3      Closed
      (PQFP)

    80486SX-25      2 & 3      Open        Open       2 & 3      Closed
      (PGA)

    80486SX-33       Open      Open        Open       2 & 3       Open
      (PQFP)

    80487SX-25      1 & 2,     1 & 2      Closed      2 & 3      Closed
                    3 & 4

    80486DX-33      1 & 2,     2 & 3       Open       2 & 3       Open
                    3 & 4

    80486DX-50      1 & 2,     2 & 3       Open       1 & 2       Open
                    3 & 4

  Note: Pins designated should be in the closed position.

                   CPU SPEED/TYPE CONFIGURATION (CONT)

       Type           JP2       JP3        JP4        JP33        JP72

    80486DX2-50      1 & 2,    2 & 3      Open       2 & 3       Closed
                     3 & 4

    80486DX2-66      1 & 2,    2 & 3      Open       2 & 3        Open
                     3 & 4

      Pentium        1 & 2,    1 & 2     Closed      2 & 3       Closed
     Overdrive       3 & 4

  Note: Pins designated should be in the closed position.

  VESA WAIT STATE CONFIGURATION

   Wait states          ID2

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        ID3

   <= 33MHz        Open

   > 33MHz        Closed

