
EPOX COMPUTER CO., LTD.

P55-TF

Processor           CX M1/AM K5/Pentium
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            Intel
Video Chip Set      None
Maximum Onboard     128MB (EDO supported)
Memory
Maximum Video       None
Memory
Cache               256/512KB
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), cache slot, IR
                    connector
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Serial port 1              CN1       IDE interface LED          J13

  Serial port 2              CN2       Green PC LED               J14

  Floppy drive interface     CN3       Turbo LED                  J15

  Parallel port              CN4       Reset switch               J16

  IDE interface 2            CN5       Speaker                    J17

  IDE interface 1            CN6       Power LED & keylock        J18

  PS/2 mouse interface        J3       IR connector               JP2

  Chassis fan power           J9       32-bit PCI slots         PC1  PC4

  Green PC connector         J12       Cache slot                 SL1

                        USER CONFIGURABLE SETTINGS

                Function                      Label          Position

      Keyboard clock select depends on         JP4          Pins 1 & 2
      ISA clock                                               closed

      Keyboard clock select 12MHz              JP4          Pins 2 & 3
                                                              closed

      Flash BIOS normal operation              JP6          Pins 1 & 2
                                                              closed

      Flash BIOS programming mode              JP6          Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 12v            JP7          Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 5v             JP7          Pins 1 & 2
                                                              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. Board also accepts x 32
            SIMMs.

                            CACHE CONFIGURATION

      Size          Bank 0             SL1                   TAG

   256KB (A)     (2) 32K x 32     Not installed          Unidentified

   256KB (A)         None          256KB module          Unidentified
                                    installed

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

   512KB (B)     (2) 64K x 32     Not installed          Unidentified

   512KB (C)         None          512KB module          Unidentified
                                    installed

                  CACHE JUMPER CONFIGURATION

        Size                 JP10                 JP11

      256KB (A)        Pins 1 & 2 closed   Pins 1 & 2 closed

      256KB (A)        Pins 1 & 2 closed   Pins 2 & 3 closed

      512KB (A)        Pins 1 & 2 closed   Pins 1 & 2 closed

      512KB (B)        Pins 2 & 3 closed   Pins 1 & 2 closed

      512KB (C)        Pins 1 & 2 closed   Pins 2 & 3 closed

                        CPU SPEED SELECTION (CYRIX)

    CPU     Clock    Multiplier    JP3    JP12   JP13    JPS1      JPS2
  speed     speed

  120MHz    50MHz        2x        1 &    2 &     1 &    Closed   Closed
                                    2      3      2

  133MHz    55MHz        2x        1 &    2 &     1 &    Open      Open
                                    2      3      2

  150MHz    60MHz        2x        2 &    2 &     1 &    Closed    Open
                                    3      3      2

  166MHz    66MHz        2x        2 &    2 &     1 &    Open     Closed
                                    3      3      2

  Note: Pins designated should be in the closed position. J8 must be set
  for correct CPU type.

                      CPU SPEED SELECTION (AMD)

  Note: The jumper settings for the AMD processor is unidentified.

                        CPU SPEED SELECTION (INTEL)

    CPU     Clock    Multiplier    JP3    JP12   JP13    JPS1      JPS2
  speed     speed

  75MHz     50MHz       1.5x       1 &    2 &     2 &    Closed   Closed
                                    2      3      3

  90MHz     60MHz       1.5x       2 &    2 &     2 &    Closed    Open
                                    3      3      3

  100MHz    66MHz       1.5x       2 &    2 &     2 &    Open     Closed
                                    3      3      3

  120MHz    60MHz        2x        2 &    2 &     1 &    Closed    Open
                                    3      3      2

  133MHz    66MHz        2x        2 &    2 &     1 &    Open     Closed
                                    3      3      2

  150MHz    60MHz       2.5x       2 &    1 &     1 &    Closed    Open
                                    3      2      2

  166MHz    66MHz       2.5x       2 &    1 &     1 &    Open     Closed
                                    3      2      2

  180MHz    60MHz        3x        2 &    1 &     2 &    Closed    Open
                                    3      2      3

  200MHz    66MHz        3x        2 &    1 &     2 &    Open     Closed
                                    3      2      3

  Note: Pins designated should be in the closed position. J8 must be set
  for correct CPU type.

                            CPU TYPE SELECTION

    Type          JP8A            JP8B           JP8C           JP8D

    Cyrix       Pins 1 & 2     Pins 1 & 2     Pins 1 & 2      Pins 1 & 2
                 closed          closed         closed         closed

     AMD        Pins 1 & 2     Pins 1 & 2     Pins 1 & 2      Pins 1 & 2
                 closed          closed         closed         closed

    P54C        Pins 1 & 2     Pins 1 & 2     Pins 1 & 2      Pins 1 & 2
                 closed          closed         closed         closed

    P55C        Pins 2 & 3     Pins 2 & 3     Pins 2 & 3      Pins 2 & 3
                 closed          closed         closed         closed

