
UNIDENTIFIED

P55-ET

Processor             Pentium
Processor Speed       75/90/100/120/133/150/166MHz
Chip Set              Intel
Video Chip Set        None
Maximum Onboard       128MB (EDO supported)
Memory
Maximum Video Memory  None
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 port, PS/2 mouse interface, serial ports
                      (2), cache slot, VRM connector
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Serial port 2              CN1       Turbo switch                J4

  Serial port 1              CN2       Turbo LED                   J5

  Parallel port              CN3       Green PC LED                J6

  Floppy drive interface     CN4       Chassis fan power           J7

  IDE interface 2            CN5       PS/2 mouse interface       J10

  IDE interface 1            CN6       IDE interface LED          JP5

  PS/2 mouse port            CN7       Green PC connector         JP14

  Power LED & keylock         J1       32-bit PCI slots         PC1 - PC4

  Speaker                     J2       Cache slot                 SL1

  Reset switch                J3       VRM connector              VRM

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     SMC chip enabled                      J24              Open

      SMC chip disabled                     J24             Closed

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

      Flash BIOS voltage select 12v         JP6        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

         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             TAG                  SL1

    256KB (A)      (2) 32K x 32         None             256KB module
                                                          installed

    256KB (B)      (2) 32K x 32    (1) 8K/16K x 8       Not installed

    512KB (A)      (2) 64K x 32   (1) 16K/32K x 8       Not installed

    512KB (B)      (2) 32K x 32   (1) 16K/32K x 8        256KB module
                                                          installed

  Note: If 256KB (A) configuration is used, see jumper setting for TP1
  below.

                  CACHE JUMPER CONFIGURATION

        Size                 JP10                 JP11

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

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

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

               CACHE JUMPER CONFIGURATION

            Size                        TP1

       Bank 0 enabled                  Open

      Bank 0 disabled        Pins 1 & 2, 3 & 4 closed

                            CPU SPEED SELECTION

    CPU      Clock    Multiplier   J25    JP7    JP9     JPS1      JPS2
  speed     speed

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

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

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

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

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

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

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

  Note: Pins designated should be in the closed position.

            CPU TYPE SELECTION

        Type                 JP1

     P54C/P54CS       Pins 1 & 2 closed

     P55C/P55CT       Pins 2 & 3 closed

[Image]

     CACHE JUMPER CONFIGURATION (ESCM CACHE MODULE)

            Size                        JP1

           256KB             Pins 1 & 2, 5 & 6 closed

           512KB             Pins 2 & 3, 4 & 5 closed

