
EPOX COMPUTER CO., LTD.

P55-BT

Processor        CX 6X86/CX 6X86L/IBM 6X86/IBM 6X86L//CX 6X86MX/AM K5/ AM
                 K6/Pentium
Processor Speed  90/100/120/133/150/166/180/200/225/233/266MHz
Chip Set         Intel
Video Chip Set   None
Maximum Onboard  256MB (EDO supported)
Memory
Maximum Video    None
Memory
Cache            512KB
BIOS             Award
Dimensions       254mm x 218mm
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, VRM connector,
                 USB connector, ATX power connector
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                Location

  ATX power                ATX        Soft off power            JP9
  connector                           supply

  USB connector            CN1        PS/2 mouse               JP13
                                      interface

  Parallel port            CN2        Power LED &         JP14/pins 1  5
                                      keylock

  Serial port 2            CN3        Speaker              JP14/pins 7 -
                                                                10

  Serial port 1            CN4        Reset switch         JP14/pins 12 &
                                                                13

  IDE interface 2          CN5        Green PC             JP14/pins 15 &
                                      connector                 16

  IDE interface 1          CN6        Green PC LED         JP14/pins 18 &
                                                                19

  Floppy drive             CN7        Turbo LED            JP14/pins 20 &
  interface                                                     21

  IR connector             J4         IDE interface LED    JP14/pins 23 &
                                                                24

  Chassis fan power        JP1        32-bit PCI slots       PC1  PC4

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Keyboard power on enabled               JP2           Pins 1 & 2
                                                              closed

      Keyboard power on disabled              JP2           Pins 2 & 3
                                                              closed

     CMOS memory normal operation            JP8           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP8           Pins 2 & 3
                                                              closed

                  DIMM/SIMM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2

      8MB           None           None       (2) 1M x 36

      8MB           None       (1) 1M x 64       None

     16MB           None           None       (2) 2M x 36

     16MB           None       (1) 2M x 64       None

     16MB       (1) 1M x 64        None       (2) 1M x 36

     16MB       (1) 1M x 64    (1) 1M x 64       None

     32MB           None           None       (2) 4M x 36

     32MB           None       (1) 4M x 64       None

     32MB       (1) 2M x 64        None       (2) 2M x 36

     32MB       (1) 2M x 64    (1) 2M x 64       None

     40MB       (1) 1M x 64        None       (2) 4M x 36

     48MB       (1) 4M x 64        None       (2) 2M x 36

     48MB       (1) 2M x 64        None       (2) 4M x 36

     64MB           None           None       (2) 8M x 36

     64MB       (1) 8M x 64        None          None

     64MB       (1) 4M x 64        None       (2) 4M x 36

     64MB       (1) 4M x 64    (1) 4M x 64       None

     72MB       (1) 1M x 64        None       (2) 8M x 36

     80MB       (1) 8M x 64        None       (2) 2M x 36

     80MB       (1) 2M x 64        None       (2) 8M x 36

     96MB       (1) 8M x 64        None       (2) 4M x 36

     96MB       (1) 4M x 64        None       (2) 8M x 36

                DIMM/SIMM CONFIGURATION (CONT)

      Size          Bank 0          Bank 1          Bank 2

     128MB        (1) 8M x 64        None        (2) 8M x 36

     128MB        (1) 8M x 64     (1) 8M x 64        None

     128MB           None            None        (2) 16M x 36

     144MB        (1) 1M x 64     (1) 1M x 64    (2) 16M x 36

     160MB        (1) 2M x 64     (1) 2M x 64    (2) 16M x 36

     192MB        (1) 4M x 64     (1) 4M x 64    (2) 16M x 36

     256MB        (1) 8M x 64     (1) 8M x 64    (2) 16M x 36

  Note: Board accepts EDO memory.

                        DIMM VOLTAGE CONFIGURATION

               Voltage                                 JP7

                  3.3v                     Pins 1 & 2, 3 & 4 closed

                    5v                      Pins 5 & 6, 7 & 8 closed

                CACHE CONFIGURATION

      Size            Bank 0            TAG

      512KB        (2) 64K x 32     Unidentified

  Note: The location of the TAG is unidentified.

                       CPU SPEED SELECTION (CX 6X86)

    CPU speed       Clock speed         Multiplier             JP4

     133MHz            66MHz                2x             Pins 23 & 24
                                                              closed

     150MHz            60MHz                2x              Pins 5 & 6
                                                              closed

     166MHz            66MHz                2x              Pins 7 & 8
                                                              closed

     200MHz            66MHz                2x             Pins 25 & 26
                                                              closed

                      CPU SPEED SELECTION (CX 6X86L)

    CPU speed       Clock speed         Multiplier             JP4

     133MHz            66MHz                2x             Pins 23 & 24
                                                              closed

     150MHz            60MHz                2x              Pins 5 & 6
                                                              closed

     166MHz            66MHz                2x              Pins 7 & 8
                                                              closed

     200MHz            66MHz                2x             Pins 25 & 26
                                                              closed

                      CPU SPEED SELECTION (IBM 6X86)

    CPU speed       Clock speed         Multiplier             JP4

     133MHz            66MHz                2x             Pins 23 & 24
                                                              closed

     150MHz            60MHz                2x              Pins 5 & 6
                                                              closed

     166MHz            66MHz                2x              Pins 7 & 8
                                                              closed

     200MHz            66MHz                2x             Pins 25 & 26
                                                              closed

                      CPU SPEED SELECTION (IBM 6X86L)

    CPU speed       Clock speed         Multiplier             JP4

     133MHz            66MHz                2x             Pins 23 & 24
                                                              closed

     150MHz            60MHz                2x              Pins 5 & 6
                                                              closed

     166MHz            66MHz                2x              Pins 7 & 8
                                                              closed

     200MHz            66MHz                2x             Pins 25 & 26
                                                              closed

                      CPU SPEED SELECTION (CX 6X86MX)

    CPU speed       Clock speed         Multiplier             JP4

     166MHz            66MHz               2.5x             Pins 9 & 10
                                                              closed

     200MHz            66MHz                3x             Pins 11 & 12
                                                              closed

     233MHz            66MHz                4x             Pins 15 & 16
                                                              closed

     266MHz            66MHz               4.5x            Pins 19 & 20
                                                              closed

                     CPU SPEED SELECTION (IBM 6X86MX)

    CPU speed       Clock speed         Multiplier             JP4

     166MHz            66MHz               2.5x             Pins 9 & 10
                                                              closed

     200MHz            66MHz                3x             Pins 11 & 12
                                                              closed

     233MHz            66MHz                4x             Pins 15 & 16
                                                              closed

     266MHz            66MHz               4.5x            Pins 19 & 20
                                                              closed

                      CPU SPEED SELECTION (AM K5/K6)

    CPU speed       Clock speed         Multiplier             JP4

      90MHz            60MHz               1.5x             Pins 1 & 2
                                                              closed

     100MHz            66MHz               1.5x             Pins 3 & 4
                                                              closed

     120MHz            60MHz                2x              Pins 5 & 6
                                                              closed

     133MHz            66MHz                2x              Pins 7 & 8
                                                              closed

     150MHz            60MHz               2.5x             Pins 9 & 10
                                                              closed

     166MHz            66MHz               2.5x            Pins 11 & 12
                                                              closed

     180MHz            60MHz                3x             Pins 13 & 14
                                                              closed

     200MHz            66MHz                3x             Pins 15 & 16
                                                              closed

     225MHz            75MHz               3.5x            Pins 17 & 18
                                                              closed

     233MHz            66MHz                4x             Pins 19 & 20
                                                              closed

     266MHz            66MHz               4.5x            Pins 21 & 22
                                                              closed

                        CPU SPEED SELECTION (INTEL)

    CPU speed       Clock speed         Multiplier             JP4

      90MHz            60MHz               1.5x             Pins 1 & 2
                                                              closed

     100MHz            66MHz               1.5x             Pins 3 & 4
                                                              closed

     120MHz            60MHz                2x              Pins 5 & 6
                                                              closed

     133MHz            66MHz                2x              Pins 7 & 8
                                                              closed

     150MHz            60MHz               2.5x             Pins 9 & 10
                                                              closed

     166MHz            66MHz               2.5x            Pins 11 & 12
                                                              closed

     180MHz            60MHz                3x             Pins 13 & 14
                                                              closed

     200MHz            66MHz                3x             Pins 15 & 16
                                                              closed

     225MHz            75MHz               3.5x            Pins 17 & 18
                                                              closed

     233MHz            66MHz                4x             Pins 19 & 20
                                                              closed

     266MHz            66MHz               4.5x            Pins 21 & 22
                                                              closed

                           CPU VOLTAGE SELECTION

               Voltage                                 J18

                  2.8v                         Pins 1 & 5 closed

                   2.9v                         Pins 2 & 6 closed

                   3.2v                         Pins 3 & 7 closed

                   3.5v                         Pins 4 & 8 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

