
EPOX COMPUTER CO., LTD.

P55-TX 2

Device Type    Mainboard
Processor      CX 6X86/IBM 6X86/CX 6X86L/IBM 6X86L/CX 686MX/IBM 6X86MX/

               AM K5/AM K6/Pentium/Pentium MMX
Processor      100/120/133/150/166/188/200/225/233/266/300/333MHz
Speed
Chip Set       Intel
Video Chip Set None
Maximum        256MB (EDO & SDRAM supported)
Onboard Memory
Maximum Video  None
Memory
Cache          512KB
BIOS           Award
Dimensions     305mm x 208mm
I/O Options    32-bit PCI slots (4), floppy drive interface, green PC
               connector, IDE interfaces (2), parallel port, PS/2 mouse
               port, serial ports (2), IR connector, USB connector, ATX
               power connector
NPU Options    None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  ATX power connector        ATX       Serial port 1              JP10

  USB connector              CN1       PS/2 mouse port            JP13

  IR connector                J4       Power LED & keylock       JP14A

  IDE interface 1             J5       Speaker                   JP14B

  IDE interface 2             J6       Reset switch              JP14C

  Floppy drive interface      J7       Green PC connector        JP14D

  Parallel port               J8       Green PC LED              JP14E

  CPU fan power              JP1       Turbo LED                 JP14F

  Soft off power supply      JP9       IDE interface LED         JP14G

  Serial port 2              J11       32-bit PCI slots         PC1  PC4

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Keyboard power on disabled              JP2           Pins 2 & 3
                                                              closed

      Keyboard power on enabled               JP2           Pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP8           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP8           Pins 2 & 3
                                                              closed

             SIMM 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) 2M x 36   (2) 1M 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) 4M x 36   (2) 2M x 36

     64MB        (2) 8M x 36      None

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

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

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

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

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

  Note: Board accepts EDO memory.

                  DIMM CONFIGURATION

       Size            Bank 2            Bank 3

       8MB           (1) 1M x 64          None

       16MB          (1) 2M x 64          None

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

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

       32MB          (1) 4M x 64          None

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

       40MB          (1) 4M x 64       (1) 1M 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) 8M x 64       (1) 1M x 64

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

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

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

            Note: Board accepts EDO & SDRAM memory.

                        DIMM VOLTAGE CONFIGURATION

               Voltage                                 JP7

                  3.3v                     Pins 1 & 2, 3 & 4 closed

                    5v                      Pins 5 & 6, 7 & 8 closed

  Note: The location of JP7 is unidentified.

              CACHE CONFIGURATION

      Size          Bank 0           TAG

     512KB        (1) 64K x 64   Unidentified

                       CPU SPEED SELECTION (CX 6X86)

    CPU speed        Clock speed        Multiplier             JP4

      150MHz            60MHz               2x              Pins 3 & 4
                                                              closed

      166MHz            66MHz               2x              Pins 5 & 6
                                                              closed

      200MHz            75MHz               2x              Pins 7 & 8
                                                              closed

                      CPU SPEED SELECTION (IBM 6X86)

    CPU speed        Clock speed        Multiplier             JP4

      150MHz            60MHz               2x              Pins 3 & 4
                                                              closed

      166MHz            66MHz               2x              Pins 5 & 6
                                                              closed

      200MHz            75MHz               2x              Pins 7 & 8
                                                              closed

                      CPU SPEED SELECTION (CX 6X86L)

    CPU speed        Clock speed        Multiplier             JP4

      150MHz            60MHz               2x              Pins 3 & 4
                                                              closed

      166MHz            66MHz               2x              Pins 5 & 6
                                                              closed

      200MHz            75MHz               2x              Pins 7 & 8
                                                              closed

                      CPU SPEED SELECTION (IBM 6X86L)

    CPU speed        Clock speed        Multiplier             JP4

      150MHz            60MHz               2x              Pins 3 & 4
                                                              closed

      166MHz            66MHz               2x              Pins 5 & 6
                                                              closed

      200MHz            75MHz               2x              Pins 7 & 8
                                                              closed

                      CPU SPEED SELECTION (CX 6X86MX)

    CPU speed       Clock speed         Multiplier             JP4

     166MHz            60MHz               2.5x             Pins 9 & 10
                                                              closed

     200MHz            66MHz               2.5x            Pins 11 & 12
                                                              closed

     233MHz            75MHz               2.5x            Pins 13 & 14
                                                              closed

     233MHz            66MHz                3x             Pins 15 & 16
                                                              closed

     266MHz            75MHz                3x             Pins 17 & 18
                                                              closed

     266MHz            66MHz               3.5x            Pins 19 & 20
                                                              closed

                     CPU SPEED SELECTION (IBM 6X86MX)

    CPU speed       Clock speed         Multiplier             JP4

     166MHz            60MHz               2.5x             Pins 9 & 10
                                                              closed

     200MHz            66MHz               2.5x            Pins 11 & 12
                                                              closed

     233MHz            75MHz               2.5x            Pins 13 & 14
                                                              closed

     233MHz            66MHz                3x             Pins 15 & 16
                                                              closed

     266MHz            75MHz                3x             Pins 17 & 18
                                                              closed

     266MHz            66MHz               3.5x            Pins 19 & 20
                                                              closed

                        CPU SPEED SELECTION (AM K5)

    CPU speed       Clock speed         Multiplier             JP4

     100MHz            66MHz               1.5x             Pins 1 & 2
                                                              closed

     120MHz            60MHz                2x              Pins 3 & 4
                                                              closed

     133MHz            66MHz                2x              Pins 5 & 6
                                                              closed

     150MHz            60MHz               2.5x             Pins 9 & 10
                                                              closed

     166MHz            66MHz               2.5x            Pins 11 & 12
                                                              closed

     188MHz            75MHz               2.5x            Pins 13 & 14
                                                              closed

     200MHz            66MHz                3x             Pins 15 & 16
                                                              closed

                        CPU SPEED SELECTION (AM K6)

    CPU speed       Clock speed         Multiplier             JP4

     166MHz            66MHz               2.5x            Pins 11 & 12
                                                              closed

     200MHz            66MHz                3x             Pins 15 & 16
                                                              closed

     233MHz            66MHz               3.5x            Pins 19 & 20
                                                              closed

     266MHz            66MHz                4x             Pins 21 & 22
                                                              closed

     300MHz            60MHz                5x             Pins 23 & 24
                                                              closed

     333MHz            66MHz                5x             Pins 25 & 26
                                                              closed

                        CPU SPEED SELECTION (INTEL)

    CPU speed       Clock speed         Multiplier             JP4

     100MHz            66MHz               1.5x             Pins 1 & 2
                                                              closed

     120MHz            60MHz                2x              Pins 3 & 4
                                                              closed

     133MHz            66MHz                2x              Pins 5 & 6
                                                              closed

     150MHz            60MHz               2.5x             Pins 9 & 10
                                                              closed

     150MHz            75MHz                2x              Pins 7 & 8
                                                              closed

     166MHz            66MHz               2.5x            Pins 11 & 12
                                                              closed

     188MHz            75MHz               2.5x            Pins 13 & 14
                                                              closed

     200MHz            66MHz                3x             Pins 15 & 16
                                                              closed

                      CPU SPEED SELECTION (INTEL MMX)

    CPU speed       Clock speed         Multiplier             JP4

     166MHz            66MHz               2.5x            Pins 11 & 12
                                                              closed

     200MHz            66MHz                3x             Pins 15 & 16
                                                              closed

     233MHz            66MHz               3.5x            Pins 19 & 20
                                                              closed

           CPU VOLTAGE SELECTION

       Voltage                 J18

         2.0v           Pins 1 & 6 closed

         2.1v          Pins 5 & 10 closed

         2.8v           Pins 2 & 7 closed

         2.9v           Pins 3 & 8 closed

         3.2v           Pins 4 & 9 closed

                           FLASH BIOS SELECTION

         Setting                    J9                      J10

             5v             Pins 2 & 3 closed       Pins 2 & 3 closed

             12v             Pins 1 & 2 closed       Pins 1 & 2 closed

