
ANTEC, INC.

MB5685

Processor         CX M1/IBM/AM K5/AM K6/Pentium
Processor Speed   75/90/100/120/125/133/150/166/200/233MHz
Chip Set          Intel
Video Chip Set    None
Maximum Onboard   256MB (EDO supported)
Memory
Maximum Video     None
Memory
Cache             256/512KB
BIOS              Award
Dimensions        220mm x 220mm
I/O Options       32-bit PCI slots (4), floppy drive interface, green PC
                  connector, IDE interfaces (2), parallel port, PS/2 mouse
                  interface, serial ports (2), IR connector, USB
                  connectors (2)
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Floppy drive interface     CN1       PS/2 mouse interface       J99

  Serial port 1              CN2       Chassis fan power          JP1

  Serial port 2              CN3       IR connector               JP3

  Parallel port              CN4       Reset switch               JP12

  IDE interface 1             J6       Green PC connector         JP15

  IDE interface 2             J7       IDE interface LED          JP22

  USB connector              J10       Green PC LED               JP33

  USB connector              J11       32-bit PCI slots         PC1  PC4

  Speaker                    J12       Cache slot                 SL1

  Power LED & keylock        J14

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

      Flash BIOS voltage select 12v        JP19        Pins 1 & 2 closed

      Flash BIOS voltage select 5v         JP19        Pins 2 & 3 closed

     CMOS memory normal operation         JP40        Pins 2 & 3 closed

      CMOS memory clear                    JP40        Pins 1 & 2 closed

     Factory configured - do not          JP42          Unidentified
      alter

                            DRAM CONFIGURATION

          Size                    Bank 0                   Bank 1

           8MB                 (2) 1M x 36                  None

          16MB                 (2) 2M x 36                  None

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

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

          32MB                 (2) 4M x 36                  None

          32MB                 (2) 2M x 36              (2) 2M x 36

          40MB                 (2) 4M x 36              (2) 1M x 36

          48MB                 (2) 2M x 36              (2) 4M x 36

          64MB                 (2) 8M x 36                  None

          64MB                 (2) 4M x 36              (2) 4M x 36

          72MB                 (2) 1M x 36              (2) 8M x 36

          80MB                 (2) 2M x 36              (2) 8M x 36

          96MB                 (2) 4M x 36              (2) 8M x 36

          128MB                (2) 8M x 36              (2) 8M x 36

          128MB                (2) 16M x 36                 None

          136MB                (2) 1M x 36              (2) 16M x 36

          144MB                (2) 2M x 36              (2) 16M x 36

          160MB                (2) 4M x 36              (2) 16M x 36

          192MB                (2) 8M x 36              (2) 16M x 36

          256MB                (2) 16M x 36             (2) 16M x 36

  Note: Board accepts EDO memory. Do not install SIMMs & DIMMs at the
  same time.

              DIMM CONFIGURATION

      Size          Bank 0          Bank 1

      8MB         (1) 1M x 64        None

      16MB        (1) 2M x 64        None

      16MB        (1) 1M x 64    (1) 1M x 64

      24MB        (1) 1M x 64    (1) 2M x 64

      32MB        (1) 4M x 64        None

      32MB        (1) 2M x 64    (1) 2M x 64

      40MB        (1) 1M x 64    (1) 4M x 64

      48MB        (1) 4M x 64    (1) 2M x 64

      64MB        (1) 8M x 64        None

      64MB        (1) 4M x 64    (1) 4M x 64

      72MB        (1) 1M x 64    (1) 8M x 64

      80MB        (1) 2M x 64    (1) 8M x 64

      96MB        (1) 4M x 64    (1) 8M x 64

     128MB        (1) 8M x 64    (1) 8M x 64

     128MB        (1) 16M x 64       None

     136MB        (1) 1M x 64    (1) 16M x 64

     144MB        (1) 2M x 64    (1) 16M x 64

     160MB        (1) 4M x 64    (1) 16M x 64

     192MB        (1) 8M x 64    (1) 16M x 64

     256MB        (1) 16M x 64   (1) 16M x 64

                            CACHE CONFIGURATION

          Size                   Bank 0                     SL1

          256KB               (2) 32K x 32             Not installed

          512KB               (2) 32K x 32        256KB module installed

                  CACHE JUMPER CONFIGURATION

        Size                 JP29                 JP30

        256KB          Pins 1 & 2 closed   Pins 2 & 3 closed

        512KB          Pins 2 & 3 closed   Pins 1 & 2 closed

                        CPU SPEED SELECTION (CYRIX)

  CPU speed      Clock      Multiplier       JP23      JP24       JP36
                speed

   120MHz       50MHz           2x          1 & 2      2 & 3     1 & 2, 3
                                                                 & 4, 5 &
                                                                    6

   133MHz       55MHz           2x          1 & 2      2 & 3     1 & 2, 5
                                                                   & 6

   150MHz       60MHz           2x          1 & 2      2 & 3     1 & 2, 3
                                                                   & 4

   166MHz       66MHz           2x          1 & 2      2 & 3     3 & 4, 5
                                                                   & 6

  Note: Pins designated should be in the closed position.

                         CPU SPEED SELECTION (IBM)

  CPU speed      Clock      Multiplier       JP23      JP24       JP36
                speed

   120MHz       50MHz           2x          1 & 2      2 & 3     1 & 2, 3
                                                                 & 4, 5 &
                                                                    6

   133MHz       55MHz           2x          1 & 2      2 & 3     1 & 2, 5
                                                                   & 6

   150MHz       60MHz           2x          1 & 2      2 & 3     1 & 2, 3
                                                                   & 4

   166MHz       66MHz           2x          1 & 2      2 & 3     3 & 4, 5
                                                                   & 6

  Note: Pins designated should be in the closed position.

                         CPU SPEED SELECTION (AMD)

  CPU speed      Clock      Multiplier       JP23      JP24       JP36
                speed

    75MHz       50MHz          1.5x         2 & 3      2 & 3     1 & 2, 3
                                                                 & 4, 5 &
                                                                    6

    90MHz       60MHz          1.5x         2 & 3      2 & 3     1 & 2, 3
                                                                   & 4

   100MHz       66MHz          1.5x         2 & 3      2 & 3     3 & 4, 5
                                                                   & 6

   120MHz       60MHz          1.5x         2 & 3      2 & 3     1 & 2, 3
                                                                   & 4

   133MHz       66MHz          1.5x         2 & 3      2 & 3     3 & 4, 5
                                                                   & 6

   150MHz       60MHz          1.75x        1 & 2      1 & 2     1 & 2, 3
                                                                   & 4

   166MHz       66MHz          1.75x        1 & 2      1 & 2     3 & 4, 5
                                                                   & 6

   166MHz       66MHz          2.5x         1 & 2      1 & 2     3 & 4, 5
                                                                   & 6

   200MHz       66MHz           3x          2 & 3      1 & 2     3 & 4, 5
                                                                   & 6

   233MHz       66MHz          3.5x         2 & 3      2 & 3     3 & 4, 5
                                                                   & 6

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

  CPU speed      Clock      Multiplier       JP23      JP24       JP36
                speed

    75MHz       50MHz          1.5x         2 & 3      2 & 3     1 & 2, 3
                                                                 & 4, 5 &
                                                                    6

    90MHz       60MHz          1.5x         2 & 3      2 & 3     1 & 2, 3
                                                                   & 4

   100MHz       66MHz          1.5x         2 & 3      2 & 3     3 & 4, 5
                                                                   & 6

   120MHz       60MHz           2x          1 & 2      2 & 3     1 & 2, 3
                                                                   & 4

   125MHz       50MHz          2.5x         1 & 2      1 & 2     1 & 2, 3
                                                                 & 4, 5 &
                                                                    6

   133MHz       66MHz           2x          1 & 2      2 & 3     3 & 4, 5
                                                                   & 6

   150MHz       60MHz          2.5x         1 & 2      1 & 2     1 & 2, 3
                                                                   & 4

   166MHz       66MHz          2.5x         1 & 2      1 & 2     3 & 4, 5
                                                                   & 6

   200MHz       66MHz           3x          2 & 3      1 & 2     3 & 4, 5
                                                                   & 6

   233MHz       66MHz          3.5x         2 & 3      2 & 3     3 & 4, 5
                                                                   & 6

  Note: Pins designated should be in the closed position.

                CPU VOLTAGE SELECTION (SINGLE)

    Voltage          J100            J101            J103

     3.34v           3 & 4       1 & 3, 2 & 4       1 & 3

     3.58v           3 & 4       1 & 3, 2 & 4    1 & 3, 2 & 4

  Note: Pins designated should be in the closed position.

                       CPU VOLTAGE SELECTION (DUAL)

    Voltage         V core          J100          J101           J103

      3.3v           2.86v          3 & 4       3 & 5, 4 &       Open
                                                    6

      3.3v           2.97           3 & 4       3 & 5, 4 &      2 & 4
                                                    6

      3.3v           3.15           3 & 4       3 & 5, 4 &      3 & 4
                                                    6

  Note: Pins designated should be in the closed position.

                     VOLTAGE FINE TUNE SELECTION

              Setting                             JP43

       V core normal voltage                     Closed

  V core voltage increase by 2.5%                 Open

