
INTEL CORPORATION

4DX2-66

Processor   80486DX/ODP486DX/80486DX2/80486DX4/P24D/P24T
Processor   25/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set    Unidentified
Video Chip  Cirrus Logic
Set
Maximum     64MB
Onboard
Memory
Maximum     1MB
Video
Memory
Cache       128KB
BIOS        Phoenix
Dimensions  254mm x 218mm
I/O Options 32-bit PCI slots (3), floppy drive interface, IDE interfaces
            (2), parallel port, PS/2 mouse port, serial ports (2), VESA
            feature connector, VGA port
NPU Options None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  VESA feature connector     CN1       IDE interface 1            J21

  PS/2 mouse port             J1       Power LED & keylock        J29

  VGA port                    J4       Reset switch               J32

  Serial port 1              J12       IDE interface LED          J34

  Serial port 2              J13       Speaker                    J37

  Parallel port              J17       Turbo LED                  J40

  Floppy drive interface     J18       Chassis fan power          J41

  IDE interface 2            J19       32-bit PCI slots         PC1 - PC3

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Secondary IDE DMA disabled              J26           Pins 2 & 3
                                                              closed

      Secondary IDE DMA enabled               J26           Pins 1 & 2
                                                              closed

     Password normal operation               J31              Open

      Password clear                          J31             Closed

     Boot block normal operation             J35           Pins 2 & 3
                                                              closed

      Boot block boot from floppy             J35           Pins 1 & 2
                                                              closed

     On board I/O enabled                    J36           Pins 2 & 3
                                                              closed

      On board I/O disabled                   J36           Pins 1 & 2
                                                              closed

                         DRAM CONFIGURATION

         Size                 Bank 0                 Bank 1

         4MB                (1) 1M x 36               None

         8MB                (1) 1M x 36           (1) 1M x 36

         8MB                (1) 2M x 36               None

         12MB               (1) 2M x 36           (1) 1M x 36

         16MB               (1) 2M x 36           (1) 2M x 36

         16MB               (1) 4M x 36               None

         20MB               (1) 4M x 36           (1) 1M x 36

         24MB               (1) 4M x 36           (1) 2M x 36

         32MB               (1) 4M x 36           (1) 4M x 36

         32MB               (1) 8M x 36               None

         36MB               (1) 1M x 36           (1) 8M x 36

         40MB               (1) 2M x 36           (1) 8M x 36

         48MB               (1) 4M x 36           (1) 8M x 36

         64MB               (1) 8M x 36           (1) 8M x 36

  Note: Board also accepts x 32 SIMMs. Banks are interchangeable.

         DRAM TYPE CONFIGURATION

        Type                 J30

     x 32 SIMMs       Pins 2 & 3 closed

     x 36 SIMMs       Pins 1 & 2 closed

                            CACHE CONFIGURATION

                Size                                Bank 0

                128KB                                128KB

  Note: The location of bank 0 is unidentified. The size of the cache
  chips are unidentified.

                  CACHE JUMPER CONFIGURATION

        Size                 J24                  J25

        128KB          Pins 2 & 3 closed   Pins 2 & 3 closed

                        VIDEO MEMORY CONFIGURATION

            Note: Board is factory installed with 1MB of video memory and
            is not configurable. The location is unidentified.

           CPU SPEED SELECTION

        Speed                J39

        25MHz         Pins 2 & 3 closed

       50iMHz         Pins 2 & 3 closed

       66iMHz         Pins 1 & 2 closed

       75iMHz         Pins 2 & 3 closed

       100iMHz        Pins 1 & 2 closed

            CPU TYPE SELECTION

        Type                 J38

       80486DX        Pins 3 & 4 closed

      ODP486DX        Pins 1 & 2 closed

      80486DX2        Pins 3 & 4 closed

       8086DX4        Pins 3 & 4 closed

        P24D          Pins 5 & 6 closed

        P24T          Pins 5 & 6 closed

                            CPU TYPE SELECTION

                  Type                                  J27

                 SL-series                      Pins 2 & 3 closed

                Non SL-series                    Pins 1 & 2 closed

  Note: Do not change this from the default setting.

                         CPU MULTIPLIER SELECTION

               Multiplier                               J33

                  Reserved                       Pins 1 & 2 closed

                     2x                          Pins 2 & 3 closed

                    3x                                Open

                           CPU VOLTAGE SELECTION

               Voltage                                 J3

                   3.3v                     Pins 1 & 3, 2 & 4 closed

                   5v                      Pins 3 & 5, 4 & 6 closed

                           DMA CHANNEL SELECTION

         Channel                   J22                      J23

             1             Pins 1 & 2 closed        Pins 1 & 2 closed

              3             Pins 2 & 3 closed        Pins 2 & 3 closed

