
EFA CORPORATION

P5TX-AT

Processor            CX M1/AM K5/AM K6/Pentium
Processor Speed      75/90/100/120/133/150/166/200MHz
Chip Set             Intel
Video Chip Set       None
Maximum Onboard      256MB (EDO supported)
Memory
Maximum Video Memory None
Cache                256/512KB
BIOS                 Award
Dimensions           250mm x 220mm
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), cache slot, IR
                     connector, USB connector
NPU Options          None

[Image]

                                CONNECTIONS

  Purpose               Location       Purpose               Location

  Serial port 2            CN1         Speaker             J18/pins 1, 3,
                                                               5, 7

  Serial port 1            CN2         Power LED &         J18/pins 2, 4,
                                       keylock               6, 8, 10

  Parallel port            CN3         Turbo LED           J18/pins 11 &
                                                                12

  Floppy drive             CN4         Green PC            J18/pins 13 &
  interface                            connector                14

  IDE interface 2          CN5         IDE interface       J18/pins 15 &
                                       LED                      16

  IDE interface 1          CN6         Reset switch        J18/pins 17 &
                                                                18

  USB connector            J2          Green PC LED        J18/pins 19 &
                                                                20

  PS/2 mouse port          J3          32-bit PCI slots      PC1  PC4

  IR connector             J9          Cache slot               SL1

  External battery         J10

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            JP15          Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP15          Pins 2 & 3
                                                              closed

              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) 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

     128MB        (2) 16M x 36       None

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

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

                        DRAM CONFIGURATION (CONT)

          Size                    Bank 0                   Bank 1

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

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

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

            Note: Board accepts EDO memory. Board also accepts x 32
            SIMMs. Memory installed in Banks 1 & 2 is interchangeable.

             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) 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

                            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                 JP14

        256KB         Pins 1 & 2 closed

        512KB         Pins 2 & 3 closed

                        CPU SPEED SELECTION (CX M1)

    CPU       Clock     Multiplier    JP2     JP3    JP4    JP9     JP10
   speed      speed

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

  133MHz      60MHz         2x         2 &    2 &     1 &    2 &    1 & 2
                                       3       3      2      3

  150MHz      66MHz         2x         1 &    2 &     2 &    2 &    1 & 2
                                       2       3      3      3

  166MHz      60MHz         2x         2 &    2 &     2 &    2 &    1 & 2
                                       3       3      3      3

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (AM K5)

    CPU       Clock     Multiplier    JP2     JP3    JP4    JP9     JP10
   speed      speed

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

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

  100MHz      66MHz        1.5x        2 &    2 &     2 &    1 &    1 & 2
                                       3       3      3      2

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

  133MHz      66MHz        1.5x        2 &    2 &     2 &    1 &    1 & 2
                                       3       3      3      2

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

  166MHz      66MHz       1.75x        2 &    2 &     2 &    2 &    2 & 3
                                       3       3      3      3

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

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

    CPU       Clock     Multiplier    JP2     JP3    JP4    JP9     JP10
   speed      speed

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

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

  100MHz      66MHz        1.5x        2 &    2 &     2 &    1 &    1 & 2
                                       3       3      3      2

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

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

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

  166MHz      66MHz        2.5x        2 &    2 &     2 &    2 &    2 & 3
                                       3       3      3      3

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

  Note: Pins designated should be in the closed position.

                           CPU VOLTAGE SELECTION

         Voltage                   JP6                      JP7

          2.5v              Pins 1 & 2 closed         Pins 1 & 3, 2 & 4
                                                           closed

          2.8v              Pins 3 & 4 closed         Pins 1 & 3, 2 & 4
                                                           closed

          3.3v              Pins 2 & 4 closed         Pins 3 & 5, 4 & 6
                                                           closed

          3.52v             Pins 5 & 6 closed         Pins 3 & 5, 4 & 6
                                                           closed

