
SILICON STAR INTERNATIONAL, INC.

PV4/PV4T (REV. 1.1)

Processor  80486SX/SL80486SX/U5S/CX486DX/AM486DX/80486DX/SL80486DX/
           AM486DX2/AM486DX2V8T/CX486DX2/CX486DX2V/SL80486DX2/AM486DX4/ 80486DX4/Pentium
           Overdrive
Processor  25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       128MB
Onboard
DRAM
Cache      128/256/512KB
BIOS       Award
Dimensions 254mm x 218mm
I/O        32-bit PCI slots (2), floppy drive interface, game port, green PC connector,
Options    IDE interfaces (2), parallel port, serial ports (2), VGA feature connector,
           VGA port
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  IDE interface (primary)     CN1       Green PC connector        JP39

  IDE interface               CN2       Power LED & keylock       JW1
  (secondary)

  Floppy drive interface      CN3       Speaker                   JW2

  Parallel port               CN4       Turbo LED                 JW3

  Serial port 1                J3       Turbo switch              JW4

  Serial port 2                J4       Reset switch              JW5

  Game interface               J5       IDE interface LED         JW6

  External battery             J6       IDE interface LED         JW7

  VGA interface                J9       32-bit PCI slots        PC1 & PC2

  VGA feature connector       J10

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             J12              N/A
      alter

     Factory configured - do not             JP5              N/A
      alter

     Factory configured - do not             JP6              N/A
      alter

     Factory configured - do not             JP36             N/A
      alter

     Factory configured - do not             JP42          pins 2 & 3
      alter                                                   closed

     Factory configured - do not             JP43          pins 1 & 2
      alter                                                   closed

     On board VGA enabled                    JP69          pins 2 & 3
                                                              closed

      On board VGA disabled                   JP69          pins 1 & 2
                                                              closed

     Factory configured - do not             JP70             Open
      alter

     Factory configured - do not             JP84             Open
      alter

     Factory configured - do not             RN18             N/A
      alter

     Factory configured - do not             RN19             N/A
      alter

     Factory configured - do not             RN20             N/A
      alter

     Factory configured - do not             RN21             N/A
      alter

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB        (1) 256K x 36         NONE            NONE

       2MB        (1) 256K x 36    (1) 256K x 36        NONE

       2MB        (1) 512K x 36         NONE            NONE

       4MB        (1) 256K x 36    (1) 256K x 36    (1) 512K x 36

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

       4MB         (1) 1M x 36          NONE            NONE

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

       6MB        (1) 256K x 36    (1) 256K x 36     (1) 1M x 36

       6MB        (1) 512K x 36     (1) 1M x 36         NONE

       8MB        (1) 512K x 36    (1) 512K x 36     (1) 1M x 36

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

       8MB         (1) 2M x 36          NONE            NONE

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

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

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

      16MB         (1) 4M x 36          NONE            NONE

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

      18MB        (1) 256K x 36    (1) 256K x 36     (1) 4M x 36

      20MB        (1) 512K x 36    (1) 512K x 36     (1) 4M x 36

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

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

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

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

      32MB         (1) 8M x 36          NONE            NONE

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

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

      40MB         (1) 1M x 36      (1) 1M x 36      (1) 8M x 36

      48MB         (1) 4M x 36      (1) 4M x 36      (1) 4M x 36

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

      64MB         (1) 16M x 36         NONE            NONE

      64MB         (1) 4M x 36      (1) 4M x 36      (1) 8M x 36

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

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

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

      68MB         (1) 1M x 36      (1) 8M x 36      (1) 8M x 36

      72MB         (1) 1M x 36      (1) 1M x 36     (1) 16M x 36

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

      80MB         (1) 4M x 36      (1) 8M x 36      (1) 8M x 36

      96MB         (1) 4M x 36      (1) 4M x 36     (1) 16M x 36

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

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

              CACHE CONFIGURATION

      Size          Bank 0           TAG

     128KB        (4) 32K x 8    (1) 32K x 8

     256KB        (4) 64K x 8    (1) 32K x 8

     512KB        (4) 128K x 8   (1) 32K x 8

               CACHE JUMPER CONFIGURATION

            Size                       JP20

           128KB             pins 1 & 2, 4 & 5 closed

           256KB             pins 2 & 3, 4 & 5 closed

           512KB             pins 2 & 3, 5 & 6 closed

                          CPU TYPE CONFIGURATION

        Type              JP7          JP10         JP11          JP37

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

     SL80486SX           Open          Open       1 & 3, 2 &      Open
                                                      4

        U5S              Open          Open       1 & 3, 2 &     1 & 2
                                                      4

      CX486DX            Open          Open       1 & 3, 2 &      Open
                                                      4

      AM486DX            Open          Open       1 & 3, 2 &     1 & 2
                                                      4

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

     SL80486DX           Open          Open       1 & 3, 2 &      Open
                                                      4

      AM486DX2           Open          Open       1 & 3, 2 &     1 & 2
                                                      4

    AM486DX2V8T         Closed         Open       3 & 4, 5 &     1 & 2
                                                      6

      CX486DX2           Open          Open       1 & 3, 2 &      Open
                                                      4

     CX486DX2V           Open          Open       3 & 4, 5 &      Open
                                                      6

     SL80486DX2          Open          Open       1 & 3, 2 &      Open
                                                      4

      AM486DX4           Open          Open       3 & 5, 4 &     1 & 2
                                                      6

      80486DX4           Open          Open       3 & 5, 4 &      Open
                                                      6

  Pentium Overdrive      Open          Open       1 & 3, 2 &      Open
                                                      4

            Note: Pins designated should be in the closed position. The
            CX486DX2V, AM486DX4V8T & 80486DX4 are only available on the
            PV4T mainboard.

                      CPU TYPE CONFIGURATION (CONT)

      Type           RN1            RN2           RN3            RN4

    80486SX           Not           Not            Not        pins 9 - 16
                  installed      installed     installed        closed

   SL80486SX          Not           Not            Not        pins 9 - 16
                  installed      installed     installed        closed

      U5S             Not           Not            Not        pins 9 - 16
                  installed      installed     installed        closed

    CX486DX           Not        pins 1 - 8        Not        pins 1 - 8
                  installed       closed       installed        closed

    AM486DX           Not           Not            Not        pins 5 - 12
                  installed      installed     installed        closed

    80486DX           Not           Not            Not        pins 5 - 12
                  installed      installed     installed        closed

   SL80486DX          Not           Not            Not        pins 5 - 12
                  installed      installed     installed        closed

    AM486DX2          Not           Not            Not        pins 5 - 12
                  installed      installed     installed        closed

  AM486DX2V8T         Not           Not            Not        pins 5 - 12
                  installed      installed     installed        closed

    CX486DX2          Not        pins 1 - 8        Not        pins 1 - 8
                  installed       closed       installed        closed

   CX486DX2V          Not        pins 1 - 8        Not        pins 1 - 8
                  installed       closed       installed        closed

   SL80486DX2         Not           Not            Not        pins 5 - 12
                  installed      installed     installed        closed

    AM486DX4          Not           Not            Not        pins 5 - 12
                  installed      installed     installed        closed

    80486DX4          Not           Not            Not        pins 5 - 12
                  installed      installed     installed        closed

     Pentium          Not           Not            Not            Not
   Overdrive      installed      installed     installed      installed

            Note: The CX486DX2V, AM486DX4V8T & 80486DX4 are only
            available on the PV4T mainboard.

                      CPU TYPE CONFIGURATION (CONT)

       Type                RN5               RN6               RN7

      80486SX         Not installed     Not installed       pins 1 - 8
                                                              closed

     SL80486SX        Not installed     Not installed       pins 1 - 8
                                                              closed

        U5S           Not installed     Not installed       pins 1 - 8
                                                              closed

      CX486DX         Not installed       pins 1 - 8      Not installed
                                           closed

      AM486DX         Not installed       pins 1 - 8        pins 1 - 8
                                           closed             closed

      80486DX         Not installed       pins 1 - 8        pins 1 - 8
                                           closed             closed

     SL80486DX        Not installed       pins 1 - 8        pins 1 - 8
                                           closed             closed

     AM486DX2         Not installed       pins 1 - 8        pins 1 - 8
                                           closed             closed

    AM486DX2V8T       Not installed       pins 1 - 8        pins 1 - 8
                                           closed             closed

     CX486DX2         Not installed       pins 1 - 8      Not installed
                                           closed

     CX486DX2V        Not installed       pins 1 - 8      Not installed
                                           closed

    SL80486DX2        Not installed       pins 1 - 8        pins 1 - 8
                                           closed             closed

     AM486DX4         Not installed       pins 1 - 8        pins 1 - 8
                                           closed             closed

     80486DX4         Not installed       pins 1 - 8        pins 1 - 8
                                           closed             closed

      Pentium          pins 7 & 16        pins 2 & 3        pins 1 & 2
     Overdrive           closed            closed             closed

            Note: The CX486DX2V, AM486DX4V8T & 80486DX4 are only
            available on the PV4T mainboard.

                          CPU SPEED CONFIGURATION

     Speed           JP32           JP33          JP34           JP35

     25MHz        pins 1 & 2        Open          Open          Closed
                    closed

     33MHz        pins 1 & 2       Closed        Closed         Closed
                    closed

     40MHz        pins 1 & 2        Open         Closed         Closed
                    closed

    50iMHz        pins 1 & 2        Open          Open          Closed
                    closed

    66iMHz        pins 1 & 2       Closed        Closed         Closed
                    closed

    75iMHz        pins 1 & 2        Open          Open          Closed
                    closed

    80iMHz        pins 1 & 2        Open         Closed         Closed
                    closed

    100iMHz       pins 1 & 2       Closed        Closed         Closed
                    closed

              CPU VOLTAGE CONFIGURATION

  Voltage     JP1        JP2        JP3        JP4

   3.3v      Closed      Open      Open       Open

   3.45v      Open      Closed     Open       Open

   3.6v       Open       Open     Closed      Open

   4.04v      Open       Open      Open      Closed

                            CMOS CONFIGURATION

          Setting                   JP60                    JP80

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

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

