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 (CON’T)

       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