
ELITEGROUP COMPUTER SYSTEMS, INC.

SI55P AIO

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  1MB
Cache                 256/512/1024KB
BIOS                  Unidentified
Dimensions            330mm x 218mm
I/O Options           32-bit PCI slots (4), floppy drive interface, green
                      PC connector, IDE interfaces (2), parallel port,
                      serial ports (2), IR connector, VRM connector
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Serial port 1             J6         Power LED &          J12 pins 11 -
                                       keylock                   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        Green PC connector        JP7

  Turbo LED             J12 pins 2 &   Chassis fan power        JP23
                             3

  Green PC connector    J12 pins 4 &   32-bit PCI slots       PC1 - PC4
                             5

  Reset switch          J12 pins 9 &
                            10

                        USER CONFIGURABLE SETTINGS

               Function                    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

      Flash BIOS voltage select 5v          JP3        Pins 1 & 2 closed

     Factory configured - do not          JP20          Unidentified
      alter

             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

  Note: Board accepts EDO memory.

  DRAM PARITY CONFIGURATION

    Setting          JP8

    Enabled        Closed

   Disabled         Open

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

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

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

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

      1MB            None        (8) 128K x 8    (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

     Voltage             JP14               JP15               JP16

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

      Mixed            Pins 1 & 2        Pins 1 & 2         Pins 1 & 2
                        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 (STD)       Pins 1 & 2 closed

     3.385v (VR)      Pins 3 & 4 closed

    3.525v (VRE)      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

