
EFA CORPORATION

P55T2PIO (REV. 2.0), P55T2SPIO (REV. 2.0)

Processor           CX M1/AM K5/Pentium
Processor Speed     75/90/100/110/120/133/150/166/200MHz
Chip Set            Intel
Video Chip Set      None
Maximum Onboard     512MB
Memory
Maximum Video       None
Memory
Cache               256/512KB
BIOS                Award
Dimensions          280mm 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), USB connectors (2),
                    IR connector, audio bus slot
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse interface        J2       Parallel port              J18

  External battery            J3       Serial port 1              J20

  IR connector                J7       Serial port 2              J21

  IDE interface LED           J8       Floppy drive               J22
                                       interface

  Green PC connector         J10       USB connector              J23

  Reset switch               J11       USB connector              J24

  Speaker                    J13       IDE interface 1            J25

  Turbo LED                  J15       IDE interface 2            J26

  Turbo switch               J16       32-bit PCI slots         PC1 - PC4

  Power LED & keylock        J17       Audio bus slot             SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Monitor type select color               JP12             Open

      Monitor type select monochrome          JP12            Closed

     CMOS memory normal operation            JP13             Open

      CMOS memory clear                       JP13            Closed

      DRAM refresh rate select 66MHz          JP14             Open

      DRAM refresh rate select 60MHz          JP14            Closed

      Flash BIOS normal operation             JP17          Pins 2 & 3
                                                              closed

      Flash BIOS recovery mode                JP17          Pins 1 & 2
                                                              closed

      Sound interface enabled                 JP18          Pins 1 & 2
                                                              closed

      Sound interface disabled                JP18          Pins 2 & 3
                                                              closed

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

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

     BIOS type select 1MB EEPROM             JP21          Pins 1 & 2
                                                              closed

      BIOS type select 2MB EEPROM             JP21          Pins 2 & 3
                                                              closed

     PS/2 mouse IRQ12 enabled                JP24            Closed

      PS/2 mouse IRQ12 disabled               JP24             Open

             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

          DRAM CONFIGURATION (CONT)

      Size          Bank 0          Bank 1

      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

     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

     256MB        (2) 32M x 36       None

     264MB        (2) 32M x 36   (2) 1M x 36

     272MB        (2) 32M x 36   (2) 2M x 36

     288MB        (2) 32M x 36   (2) 4M x 36

     320MB        (2) 32M x 36   (2) 8M x 36

     384MB        (2) 32M x 36   (2) 16M x 36

     512MB        (2) 32M x 36   (2) 32M x 36

  Note: Board also accepts x 32 SIMMs.

                            CACHE CONFIGURATION

       Size              Bank 0            Bank 1              TAG

       256KB          (2) 32K x 32          None         (1) 16K/32K x 8

       512KB          (2) 32K x 32      (2) 32K x 32     (1) 16K/32K x 8

  Note: The location of banks 0 & 1 are unidentified.

         CACHE TAG CONFIGURATION

        Type                 JP1

    Aster 16K x 8     Pins 1 & 2 closed

   Winbond 16K x 8           Open

       32K x 8        Pins 2 & 3 closed

     CACHE TYPE CONFIGURATION

      Type             JP7

  Write through       Closed

   Write back          Open

                        CPU SPEED SELECTION (CYRIX)

   CPU      Clock   Multiplier     JP5      JP6      JP11    JP15   JP16
  speed    speed

  100MHz   50MHz        2x        Closed   Closed    Open     1 &   2 & 3
                                                              2

  110MHz   55MHz        2x        Open     Open      Open     1 &   2 & 3
                                                              2

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

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

  Note: Pins designated should be in the closed position.

                      CPU SPEED SELECTION (AMD/INTEL)

   CPU      Clock   Multiplier     JP5      JP6      JP11    JP15   JP16
  speed    speed

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

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

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

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

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

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

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

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

  Note: Pins designated should be in the closed position.

                            CPU TYPE SELECTION

          Type                     JP8                      JP10

       P54C (3.4v)          Pins 2 & 3 closed         Pins 1 & 3, 2 & 4
                                                           closed

       P55C (2.5v)          Pins 1 & 2 closed         Pins 3 & 5, 4 & 6
                                                           closed

       P55C (2.8v)          Pins 4 & 5 closed         Pins 3 & 5, 4 & 6
                                                           closed

          CPU VOLTAGE SELECTION

       Voltage               JP3

     3.3v (STD)       Pins 1 & 2 closed

      3.4v (VR)       Pins 2 & 3 closed

     3.5v (VRE)       Pins 4 & 5 closed

                     MULTI I/O SELECTION

       Setting               JP4                  JP9

       Enabled         Pins 2 & 3 closed   Pins 1 & 2 closed

      Disabled         Pins 1 & 2 closed   Pins 2 & 3 closed

