UNIDENTIFIED

P55-TH

Processor           CX M1/Pentium
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            Intel
Video Chip Set      None
Maximum Onboard     512MB (EDO supported)
Memory
Maximum Video       None
Memory
Cache               256/512KB
BIOS                Award
Dimensions          330mm 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       Green PC LED                J6

  Serial port 2              CN2       Chassis fan power           J7

  Parallel port              CN3       PS/2 mouse interface       J10

  Floppy drive interface     CN4       IR connector               J33

  IDE interface 2            CN5       Turbo switch               J44

  IDE interface 1            CN6       IDE interface LED          JP5

  Power LED & keylock         J1       Green PC connector         JP14

  Speaker                     J2       32-bit PCI slots         PC1 - PC4

  Reset switch                J3       Cache slot                 SL1

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   SMC chip enabled                      J24              Open

      SMC chip disabled                     J24             Closed

      Flash BIOS voltage select 12v         JP6        Pins 2 & 3 closed

      Flash BIOS voltage select 5v          JP6        Pins 1 & 2 closed

  »   Flash BIOS normal operation           JP8        Pins 1 & 2 closed

      Flash BIOS boot block enabled         JP8        Pins 2 & 3 closed

      Jumper information unavailable       JP12          Unidentified

  »   Clock rate set as AT CLOCK           JP15        Pins 1 & 2 closed

      Clock rate set as 12MHz              JP15        Pins 2 & 3 closed

             DRAM CONFIGURATION

     Size          Bank 0        Bank 1

      8MB        (2) 1M x 36      None

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

     16MB        (2) 2M x 36      None

     24MB        (2) 1M x 36   (2) 2M x 36

     24MB        (2) 2M x 36   (2) 1M x 36

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

     32MB        (2) 4M x 36      None

     40MB        (2) 1M x 36   (2) 4M x 36

     40MB        (2) 4M x 36   (2) 1M x 36

     48MB        (2) 2M x 36   (2) 4M x 36

     48MB        (2) 4M x 36   (2) 2M x 36

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

     64MB        (2) 8M x 36      None

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

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

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

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

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

                    DRAM CONFIGURATION (CON’T)

         Size                 Bank 0                Bank 1

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

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

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

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

  Note: Board accepts EDO memory. Board also accepts x 32 SIMMs.

                            CACHE CONFIGURATION

      Size          Bank 0              TAG                   SL1

   256KB (A)     (2) 32K x 32       Unidentified              None

   256KB (B)         None           Unidentified          256KB module
                                                           installed

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

   512KB (B)     (2) 64K x 32       Unidentified              None

   512KB (C)         None           Unidentified          512KB module
                                                           installed

                  CACHE JUMPER CONFIGURATION

        Size                 JP10                 JP11

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

      256KB (B)        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 speed            Clock speed                JP1

        100MHz                 66MHz           Pins 10 & 23 closed

        120MHz                 60MHz            Pins 4 & 17 closed

        133MHz                 66MHz            Pins 5 & 18 closed

                   CPU SPEED SELECTION (INTEL)

      CPU speed            Clock speed               JP1

        75MHz                 50MHz          Pins 1 & 14 closed

        90MHz                 60MHz          Pins 2 & 15 closed

        100MHz                66MHz          Pins 3 & 16 closed

        120MHz                60MHz          Pins 4 & 17 closed

        133MHz                66MHz          Pins 5 & 18 closed

        150MHz                60MHz          Pins 6 & 19 closed

        166MHz                66MHz          Pins 7 & 20 closed

        180MHz                60MHz          Pins 8 & 21 closed

        200MHz                66MHz          Pins 9 & 22 closed

                            CPU TYPE SELECTION

           Type                JP3A       JP3B        JP3C        JP3D

           CX M1              1 & 2       1 & 2       1 & 2       1 & 2

  P54C/P54CS/P54CT/P54CTB     1 & 2       1 & 2       1 & 2       1 & 2

           P55C               2 & 3       2 & 3       2 & 3       2 & 3

        CPU AT BUS CLOCK SELECTION

       Setting               J25

      PCICLK/4        Pins 2 & 3 closed

      PCICLK/3        Pins 1 & 2 closed