
SILICON STAR INTERNATIONAL, INC.

PI4/PI4T PCI

Processor  80486SX/SL80486SX/CX486M7/AM486DX/AM486DXL PLUS/80486DX/
           SL80486DX2/AM486DX2/80486DX2/AM486DX4/80486DX4/P24D/Pentium
           Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed      100(internal)MHz
Chip Set   Unidentified
Max.       128MB
Onboard
DRAM
Cache      128/256/512/1024KB
BIOS       AMI/Award
Dimensions 330mm x 218mm
I/O        32-bit PCI bus slots (3), green PC connector, IDE interfaces (2)
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  External battery             J3       Speaker                   J10

  IDE interface (primary)      J4       Power LED & keylock       J11

  IDE interface                J5       IDE interface LED         JP10
  (secondary)

  Green PC connector           J6       IDE interface LED         JP11

  Turbo LED                    J7       Green PC connector        JP38

  Reset switch                 J8       32-bit PCI bus slots    SL1 - SL3

  Turbo switch                 J9

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     CX486S2 CPU not installed               JP1              Open

      CX486S2 CPU installed                   JP1             Closed

     Cache type select write back            JP2           pins 1 & 2
      (P24D only)                                             closed

      Cache type select write through         JP2           pins 2 & 3
      (P24D only)                                             closed

     Cache type select write back            JP3           pins 1 & 2
      (P24T only)                                             closed

      Cache type select write through         JP3           pins 2 & 3
      (P24T only)                                             closed

     Primary IDE IRQ14 enabled              JP12             Closed

      Primary IDE IRQ14 disabled             JP12              Open

     Secondary IDE IRQ15 enabled            JP13             Closed

      Secondary IDE IRQ15 disabled           JP13              Open

     Factory configured - do not            JP14           pins 2 & 3
      alter                                                   closed

     Factory configured - do not            JP26           pins 2 & 3
      alter                                                   closed

     Factory configured - do not            JP27           pins 2 & 3
      alter                                                   closed

     Factory configured - do not            JP28         pins 2 & 3, 4 &
      alter                                                  5 closed

     Factory configured - do not            JP40           pins 1 & 2
      alter                                                   closed

     Factory configured - do not            JP43           pins 2 & 3
      alter                                                   closed

     Monitor type select color              JP44             Closed

      Monitor type select monochrome         JP44              Open

  Note: The location of the factory configured jumpers is unidentified.

                            DRAM CONFIGURATION

     Size         Bank 0          Bank 1         Bank 2         Bank 3

     4MB        (1) 1M x 36        NONE           NONE           NONE

     5MB         (1) 256K x    (1) 1M x 36        NONE           NONE
                    36

     8MB        (1) 1M x 36    (1) 1M x 36        NONE           NONE

     8MB        (1) 2M x 36        NONE           NONE           NONE

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

     12MB       (1) 1M x 36    (1) 1M x 36     (1) 1M x 36       NONE

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

     16MB       (1) 2M x 36    (1) 2M x 36        NONE           NONE

     16MB       (1) 4M x 36        NONE           NONE           NONE

     17MB        (1) 256K x    (1) 4M x 36        NONE           NONE
                    36

     20MB        (1) 512K x     (1) 512K x     (1) 4M x 36       NONE
                    36              36

     20MB       (1) 1M x 36    (1) 4M x 36        NONE           NONE

     24MB        (1) 512K x     (1) 512K x     (1) 1M x 36   (1) 4M x 36
                    36              36

     24MB       (1) 1M x 36    (1) 1M x 36     (1) 4M x 36       NONE

     24MB       (1) 2M x 36    (1) 2M x 36     (1) 2M x 36       NONE

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

     32MB       (1) 4M x 36    (1) 4M x 36        NONE           NONE

     32MB       (1) 8M x 36        NONE           NONE           NONE

     36MB        (1) 512K x     (1) 512K x     (1) 4M x 36   (1) 4M x 36
                    36              36

     36MB       (1) 1M x 36    (1) 4M x 36     (1) 4M x 36       NONE

     36MB       (1) 1M x 36    (1) 8M x 36        NONE           NONE

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

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     40MB        (1) 1M x 36    (1) 1M x 36    (1) 8M x 36       NONE

     48MB        (1) 4M x 36    (1) 4M x 36    (1) 4M x 36       NONE

     48MB        (1) 4M x 36    (1) 8M x 36       NONE           NONE

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 4M x 36   (1) 4M x 36

     64MB        (1) 16M x 36      NONE           NONE           NONE

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36       NONE

     64MB        (1) 8M x 36    (1) 8M x 36       NONE           NONE

     65MB         (1) 256K x     (1) 16M x        NONE           NONE
                     36             36

     68MB        (1) 1M x 36     (1) 16M x        NONE           NONE
                                    36

     68MB        (1) 1M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     72MB        (1) 1M x 36    (1) 1M x 36     (1) 16M x        NONE
                                                   36

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

     80MB        (1) 4M x 36     (1) 16M x        NONE           NONE
                                    36

     80MB        (1) 4M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     96MB        (1) 4M x 36    (1) 4M x 36     (1) 16M x        NONE
                                                   36

     96MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36   (1) 8M x 36

     96MB        (1) 8M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     128MB       (1) 16M x 36    (1) 16M x        NONE           NONE
                                    36

     128MB       (1) 8M x 36    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

     128KB        (4) 32K x 8        NONE        (1) 32K x 8

     256KB        (4) 32K x 8     (4) 32K x 8    (1) 32K x 8

     256KB        (4) 64K x 8        NONE        (1) 32K x 8

     512KB        (4) 64K x 8     (4) 64K x 8    (1) 32K x 8

     512KB       (4) 128K x 8        NONE        (1) 32K x 8

      1MB        (4) 128K x 8    (4) 128K x 8    (1) 64K x 8

                        CACHE JUMPER CONFIGURATION

    Size         JP23        JP24         JP25        JP36        JP37

    128KB        1 & 2       1 & 2       1 & 2       1 & 2       1 & 2, 3
                                                                   & 4

    256KB        2 & 3       1 & 2       2 & 3       1 & 2       2 & 3, 4
                                                                   & 5

    256KB        2 & 3       1 & 2       1 & 2       1 & 2       1 & 2, 3
                                                                   & 4

    512KB        2 & 3       2 & 3       2 & 3       1 & 2       2 & 3, 4
                                                                   & 5

    512KB        2 & 3       2 & 3       1 & 2       1 & 2       1 & 2, 3
                                                                   & 4

     1MB         2 & 3       2 & 3       2 & 3       1 & 2       2 & 3, 4
                                                                   & 5

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

        Type             JP4        JP7       JP8        JP9       JP15

       80486SX         1 & 2, 3    Open       Open      2 & 3      Open
                         & 4

      SL80486SX        1 & 2, 3    3 & 4      Open      2 & 3      Open
                         & 4

    CX486M7 (3v)        Open       2 & 3     2 & 3      1 & 2,    3 & 4
                                                        3 & 4

    CX486M7 (5v)       1 & 2, 3    2 & 3     2 & 3      1 & 2,    3 & 4
                         & 4                            3 & 4

  AM486DX/DX2 (5v)     1 & 2, 3    Open       Open      1 & 2,    3 & 4
                         & 4                            3 & 4

  AM486DX2/DX4 (3v)     Open       Open       Open      1 & 2,    3 & 4
                                                        3 & 4

    AM486DXL PLUS      1 & 2, 3    3 & 4      Open      1 & 2,    3 & 4
                         & 4                            3 & 4

     80486DX/DX2       1 & 2, 3    Open       Open      1 & 2,    3 & 4
                         & 4                            3 & 4

    SL80486DX/DX2      1 & 2, 3    3 & 4      Open      1 & 2,    3 & 4
                         & 4                            3 & 4

      80486DX4          Open       3 & 4      Open      1 & 2,    3 & 4
                                                        3 & 4

        P24D           1 & 2, 3   1 & 2, 3    Open      1 & 2,    3 & 4
                         & 4        & 4                 3 & 4

        P24T           1 & 2, 3    3 & 4     1 & 2      1 & 2,    2 & 3
                         & 4                            3 & 4

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

        Type             JP16          JP17         JP18         JP19

       80486SX           2 & 3         Open         Open         Open

      SL80486SX          2 & 3         Open        1 & 2         Open

    CX486M7 (3v)         1 & 2         Open        1 & 2         Open

    CX486M7 (5v)         1 & 2         Open        1 & 2         Open

  AM486DX/DX2 (5v)       Open          Open         Open         Open

  AM486DX2/DX4 (3v)      Open          Open         Open         Open

    AM486DXL PLUS        2 & 3         Open        1 & 2         2 & 3

     80486DX/DX2         2 & 3         Open         Open         Open

    SL80486DX/DX2        2 & 3         Open        1 & 2         Open

      80486DX4           2 & 3         Open        1 & 2         Open

        P24D             1 & 2        1 & 2        1 & 2         1 & 2

        P24T             1 & 2        1 & 2        1 & 2         Open

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

        Type             JP20          JP21         JP22         JP39

       80486SX           Open          Open         Open         1 & 2

      SL80486SX          2 & 3        1 & 2        4 & 5         1 & 2

    CX486M7 (3v)         1 & 2         Open        2 & 3         1 & 2

    CX486M7 (5v)         1 & 2         Open        2 & 3         1 & 2

  AM486DX/DX2 (5v)       Open          Open         Open         1 & 2

  AM486DX2/DX4 (3v)      Open          Open         Open         1 & 2

    AM486DXL PLUS        2 & 3        4 & 5        4 & 5         1 & 2

     80486DX/DX2         Open          Open         Open         1 & 2

    SL80486DX/DX2        2 & 3        1 & 2        4 & 5         1 & 2

      80486DX4           2 & 3        1 & 2        4 & 5         Open

        P24D             2 & 3        2 & 3        4 & 5         1 & 2

        P24T             2 & 3         Open        1 & 2         1 & 2

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

      Type           JP46       JP47        JP48       JP49        JP50

    AM486DX2         Open      Closed       Open      Closed      Closed

   CX486DX2-50      Closed      Open        Open       Open        Open

   CX486DX2-66       Open       Open       Closed      Open        Open

   CX486DX2-80       Open       Open        Open      Closed       Open

   AM486DX/DX4       Open      Closed       Open      Closed       Open

   80486DX4-75      Closed      Open        Open       Open        Open

  80486DX4-100       Open      Closed       Open      Closed       Open

  Note: Pins designated should be in the closed position. These settings
  used only if JP4 is open.

                          CPU SPEED CONFIGURATION

     Speed          JP30          JP31          JP32            JP33

     25MHz          Open          Open          Open          pins 1 & 2
                                                               closed

     33MHz          Open         Closed        Closed         pins 1 & 2
                                                               closed

     40MHz          Open          Open         Closed         pins 2 & 3
                                                               closed

     50iMHz         Open          Open          Open          pins 1 & 2
                                                               closed

     50MHz          Open         Closed         Open          pins 2 & 3
                                                               closed

     66iMHz         Open         Closed        Closed         pins 1 & 2
                                                               closed

     75iMHz         Open          Open          Open          pins 1 & 2
                                                               closed

     80iMHz         Open          Open         Closed         pins 2 & 3
                                                               closed

    100iMHz         Open         Closed        Closed         pins 1 & 2
                                                               closed

                       CMOS DISCHARGE CONFIGURATION

          Setting                    JP6                    JP35

  CMOS memory normal          pins 1 & 2 closed       pins 1 & 2 closed
  operation

  CMOS memory clear           pins 2 & 3 closed       pins 2 & 3 closed

