
FREE COMPUTER TECHNOLOGY, INC.

486F39X, 486VL VIII

Processor   CX486S/80486SX/80486SX2/CX486DX/80486DX/CX486DX2/80486DX2/
            80486DX4/Pentium Overdrive
Processor   25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set    OPTI
Max.        64MB
Onboard
DRAM
Cache       128/256/512KB
BIOS        Award
Dimensions  330mm x 218mm
I/O Options 32-bit VESA local bus slots (3), green PC connector
NPU Options None

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  Turbo switch               J1       Break switch                 J6

  Turbo LED                  J2       External battery             J7

  Reset switch               J3       Green PC connector          JP2

  Power LED & keylock        J4       Green PC connector          JP3

  Speaker                    J5       32-bit VESA Local bus    SL1 - SL3
                                      slots

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     CMOS memory normal operation            JP4           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP4           pins 1 & 2
                                                              closed

                   DRAM CONFIGURATION (GROUP 1)

      Size            Bank 0           Bank 1          Bank 2

       1MB         (4) 256Kx 9          NONE            NONE

       2MB         (4) 256K x 9    (1) 256K x 36        NONE

       4MB         (4) 256K x 9    (1) 256K x 36    (1) 512K x 36

       4MB          (4) 1M x 9          NONE            NONE

       5MB         (4) 256K x 9     (1) 1M x 36         NONE

       6MB         (4) 256K x 9    (1) 256K x 36     (1) 1M x 36

       8MB          (4) 1M x 9      (1) 1M x 36         NONE

      10MB         (4) 256K x 9    (1) 256K x 36     (1) 2M x 36

      12MB          (4) 1M x 9      (1) 1M x 36      (1) 1M x 36

      16MB          (4) 4M x 9          NONE            NONE

      16MB          (4) 1M x 9      (1) 1M x 36      (1) 2M x 36

      17MB         (4) 256K x 9     (1) 4M x 36         NONE

      18MB         (4) 256K x 9    (1) 256K x 36     (1) 4M x 36

      20MB          (4) 1M x 9      (1) 4M x 36         NONE

      24MB          (4) 1M x 9      (1) 1M x 36      (1) 4M x 36

      32MB          (4) 4M x 9      (1) 4M x 36         NONE

      36MB          (4) 1M x 9      (1) 4M x 36      (1) 4M x 36

      40MB          (4) 1M x 9      (1) 1M x 36      (1) 8M x 36

      48MB          (4) 4M x 9      (1) 4M x 36      (1) 4M x 36

      64MB          (4) 4M x 9      (1) 4M x 36      (1) 8M x 36

                   DRAM CONFIGURATION (GROUP 2)

      Size            Bank 0           Bank 1          Bank 2

       1MB             NONE        (1) 256K x 36        NONE

       2MB             NONE        (1) 256K x 36    (1) 256K x 36

       4MB             NONE         (1) 1M x 36         NONE

       5MB             NONE        (1) 256K x 36     (1) 1M x 36

       8MB             NONE         (1) 1M x 36      (1) 1M x 36

      16MB             NONE         (1) 4M x 36         NONE

      17MB             NONE        (1) 256K x 36     (1) 4M x 36

      20MB             NONE         (1) 1M x 36      (1) 4M x 36

      32MB             NONE         (1) 4M x 36      (1) 4M x 36

                   DRAM CONFIGURATION (GROUP 3)

      Size            Bank 0           Bank 1          Bank 2

       2MB             NONE        (1) 512K x 36        NONE

       4MB             NONE        (1) 512K x 36    (1) 512K x 36

       6MB             NONE        (1) 512K x 36     (1) 1M x 36

       8MB             NONE         (1) 2M x 36         NONE

      10MB             NONE        (1) 512K x 36     (1) 2M x 36

      12MB             NONE         (1) 2M x 36      (1) 1M x 36

      16MB             NONE         (1) 2M x 36      (1) 2M x 36

      18MB             NONE        (1) 512K x 36     (1) 4M x 36

      24MB             NONE         (1) 2M x 36      (1) 4M x 36

      32MB             NONE         (1) 8M x 36         NONE

      40MB             NONE         (1) 2M x 36      (1) 8M x 36

      48MB             NONE         (1) 8M x 36      (1) 4M x 36

      64MB             NONE         (1) 8M x 36      (1) 8M x 36

               DRAM JUMPER CONFIGURATION

           Group                       JP31

          Group 1            pins 2 & 3, 4 & 5 closed

          Group 2            pins 1 & 2, 3 & 4 closed

          Group 3            pins 1 & 2, 4 & 5 closed

                            CACHE CONFIGURATION

       Size              Bank 0            Bank 1              TAG

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

       256KB           (4) 32K x 8       (4) 32K x 8      (1) 16K x 8 or
                                                           (1) 32K x 8

       256KB           (4) 64K x 8          NONE          (1) 16K x 8 or
                                                           (1) 32K x 8

       512KB           (4) 64K x 8       (4) 64K x 8       (1) 32K x 8

       512KB          (4) 128K x 8          NONE           (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

          Size                    JP12                      JP21

         128KB              pins 1 & 2 closed               Open

         256KB              pins 2 & 3 closed               Open

         256KB              pins 1 & 2, 3 & 4               Open
                                 closed

         512KB              pins 2 & 3, 4 & 5              Closed
                                 closed

         512KB              pins 1 & 2, 3 & 4              Closed
                                 closed

                          CPU TYPE CONFIGURATION

             Type                      JP6                   JP7

            CX486S                 1 & 2, 3 & 4      2 & 3, 4 & 5, 7 & 8,
                                                            9 & 10

         80486SX/SX2               2 & 3, 4 & 5      1 & 2, 3 & 4, 6 & 7,
                                                            8 & 9

           CX486DX                 1 & 2, 3 & 4      2 & 3, 4 & 5, 7 & 8,
                                                            9 & 10

           CX486DX2                1 & 2, 3 & 4      2 & 3, 4 & 5, 7 & 8,
                                                            9 & 10

         80486DX/DX2               2 & 3, 4 & 5      1 & 2, 3 & 4, 6 & 7,
                                                            8 & 9

        80486DX4 (2x)              2 & 3, 4 & 5      1 & 2, 3 & 4, 6 & 7,
                                                            8 & 9

       80486DX4 (2.5x)             2 & 3, 4 & 5      1 & 2, 3 & 4, 6 & 7,
                                                            8 & 9

        80486DX4 (3x)              2 & 3, 4 & 5      1 & 2, 3 & 4, 6 & 7,
                                                            8 & 9

          Overdrive                2 & 3, 4 & 5      1 & 2, 3 & 4, 6 & 7,
                                                            8 & 9

      Pentium Overdrive            1 & 2, 4 & 5      1 & 2, 3 & 4, 6 & 7,
                                                            8 & 9

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

         Type                JP11             JP14              JP15

        CX486S               Open         2 & 3, 5 & 6         3 & 4

      80486SX/SX2            Open         2 & 3, 4 & 5,        3 & 4
                                              6 & 7

        CX486DX              Open             3 & 4         1 & 2, 5 & 6

       CX486DX2              Open         1 & 2, 5 & 6      1 & 2, 3 & 4

      80486DX/DX2            Open         1 & 2, 4 & 5,        3 & 4
                                              6 & 7

     80486DX4 (2x)           2 & 3        1 & 2, 4 & 5,        3 & 4
                                              6 & 7

    80486DX4 (2.5x)          1 & 2        1 & 2, 4 & 5,        3 & 4
                                              6 & 7

     80486DX4 (3x)           Open         1 & 2, 4 & 5,        3 & 4
                                              6 & 7

       Overdrive             Open         1 & 2, 4 & 5,        3 & 4
                                              6 & 7

   Pentium Overdrive         Open         1 & 2, 4 & 5,        4 & 5
                                              6 & 7

  Note: Pins designated should be in the closed position.

         CPU SPEED CONFIGURATION

  Speed      JP17      JP19      JP20

  25MHz     Closed     Open     Closed

  33MHz     Closed    Closed     Open

  40MHz      Open      Open     Closed

  50iMHz    Closed     Open     Closed

  50MHz      Open     Closed     Open

  66iMHz    Closed    Closed     Open

  BUS SPEED CONFIGURATION

  CPU speed        JP24

   <=33MHz         Open

    >33MHz        Closed

