
ELITEGROUP COMPUTER SYSTEMS, INC.

SI55P AIO (VER. 1.1)

Processor             Pentium
Processor Speed       75/90/100/120/133/150/166MHz
Chip Set              SIS
Video Chip Set        None
Maximum Onboard       128MB (EDO supported)
Memory
Maximum Video Memory  None
Cache                 256/512/1024KB
BIOS                  Award
Dimensions            330mm x 218mm
I/O Options           32-bit PCI slots (2), floppy drive interface, green
                      PC connector, IDE interfaces (2), parallel port,
                      serial ports (2), VRM connector, IR connector
NPU Options           None

[Image]

                                CONNECTIONS

       Function            Label            Function            Label

  Serial port 1              J6        Power LED & keylock    J12 pins 11
                                                                 - 15

  Floppy drive               J7        Speaker                J12 pins 17
  interface                                                      - 20

  Parallel port              J8        IDE interface LED         J13

  Serial port 2              J9        VRM connector             J15

  IDE interface 2           J10        IR connector              JP2

  IDE interface 1           J11        External battery          JP7

  Green PC connector     J12 pins 4    Chassis fan power         JP23
                            & 5

  Reset switch           J12 pins 9    32-bit PCI slots       PC1 - PC4
                            & 10

                        USER CONFIGURABLE SETTINGS

                Setting                    Label           Position

      On board I/O enabled                  JP1              Open

      On board I/O disabled                 JP1             Closed

      Flash BIOS voltage select 12v         JP3        Pins 2 & 3 closed

      BIOS voltage select 5v                JP3        Pins 1 & 2 closed

      DRAM parity check enabled             JP8             Closed

      DRAM parity check disabled            JP8              Open

     Jumper information unavailable        JP20          Unavailable

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         None

       4MB        (2) 512K x 36         None

       4MB        (2) 256K x 36    (2) 256K x 36

       6MB        (2) 512K x 36    (2) 256K x 36

       6MB        (2) 256K x 36    (2) 512K x 36

       8MB         (2) 1M x 36          None

       8MB        (2) 512K x 36    (2) 512K x 36

      10MB         (2) 1M x 36     (2) 256K x 36

      10MB        (2) 256K x 36     (2) 1M x 36

      12MB         (2) 1M x 36     (2) 512K x 36

      12MB        (2) 512K x 36     (2) 1M x 36

      16MB         (2) 2M x 36          None

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

      18MB         (2) 2M x 36     (2) 256K x 36

      18MB        (2) 256K x 36     (2) 2M x 36

      20MB         (2) 2M x 36     (2) 512K x 36

      20MB        (2) 512K x 36     (2) 2M x 36

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

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

      32MB         (2) 4M x 36          None

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

            DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1

      34MB         (2) 4M x 36     (2) 256K x 36

      34MB        (2) 256K x 36     (2) 4M x 36

      36MB         (2) 4M x 36     (2) 512K x 36

      36MB        (2) 512K x 36     (2) 4M x 36

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

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

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

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

      64MB         (2) 8M x 36          None

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

      66MB         (2) 8M x 36     (2) 256K x 36

      66MB        (2) 256K x 36     (2) 8M x 36

      68MB         (2) 8M x 36     (2) 512K x 36

      68MB        (2) 512K x 36     (2) 8M x 36

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

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

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

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

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

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

      128MB        (2) 16M x 36         None

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

      130MB        (2) 16M x 36    (2) 256K x 36

      132MB        (2) 16M x 36    (2) 512K x 36

      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

  Note: Board accepts EDO memory.

                            CACHE CONFIGURATION

     Size          Bank 0          Bank 1        Bank 2          TAG

   256KB (A)     (4) 32K x 8    (4) 32K x 8       None       (1) 32K x 8

   256KB (B)        None            None        (2) 32K x    (1) 32K x 8
                                                   32

     512KB       (4) 64K x 8    (4) 64K x 8       None       (1) 32K x 8

      1MB        (4) 128K x 8   (4) 128K x 8      None       (1) 32K x 8

                  CACHE JUMPER CONFIGURATION

        Size                 JP18                 JP19

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

      256KB (B)        Pins 2 & 3 closed   Pins 2 & 3 closed

        512KB          Pins 2 & 3 closed   Pins 1 & 2 closed

         1MB           Pins 1 & 2 closed   Pins 1 & 2 closed

                        CACHE VOLTAGE CONFIGURATION

      Setting             JP14              JP15               JP16

   Mixed voltage       Pins 1 & 2         Pins 1 & 2        Pins 1 & 2
                         closed            closed             closed

       3.3v            Pins 2 & 3         Pins 2 & 3        Pins 2 & 3
                         closed            closed             closed

                            CPU SPEED SELECTION

   CPU     Clock    Multiplier   J15    JP21     JP22     JP25     JP26
  speed    speed

  75MHz    50MHz       1.5x      6 &    Open     Open    Closed    Open
                                  7,
                                  21
                                  &
                                 22

  90MHz    60MHz       1.5x      6 &    Open     Open     Open    Closed
                                  7,
                                  21
                                  &
                                 22

  100MHz   66MHz       1.5x      6 &    Open     Open    Closed   Closed
                                  7,
                                  21
                                  &
                                 22

  120MHz   60MHz        2x       6 &    Open    Closed    Open    Closed
                                  7,
                                  21
                                  &
                                 22

  133MHz   66MHz        2x       6 &    Open    Closed   Closed   Closed
                                  7,
                                  21
                                  &
                                 22

  150MHz   60MHz       2.5x      6 &   Closed   Closed    Open    Closed
                                  7,
                                  21
                                  &
                                 22

  166MHz   66MHz       2.5x      6 &   Closed   Closed   Closed   Closed
                                  7,
                                  21
                                  &
                                 22

  Note: Pins designated should be in the closed position.

          CPU VOLTAGE SELECTION

       Voltage               JP17

        3.3v          Pins 1 & 2 closed

       3.385v         Pins 3 & 4 closed

       3.525v         Pins 5 & 6 closed

                    DMA CHANNEL SELECTION

       Channel               JP4                  JP6

          1            Pins 1 & 2 closed   Pins 1 & 2 closed

          3            Pins 2 & 3 closed   Pins 2 & 3 closed

                SERIAL PORT 2 SELECTION

          Setting                       JP2

        Used as COM2         Pins 5 & 6, 7 & 8 closed

    Used as IR connector               Open

