
SILICON STAR INTERNATIONAL, INC.

PB4 (REV.1.1)

Processor  80486SX/SL AM486DX/80486DX/CX486DX2/AM486DX2/80486DX2/ CX486DX4/80486DX4/CX
           M1/P24D/Pentium Overdrive
Processor  25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)/
Speed      120(internal)MHz
Chip Set   Unidentified
Max.       64MB
Onboard
DRAM
Cache      128/256KB
BIOS       Award
Dimensions 220mm x 220mm
I/O        32-bit PCI slots (3), floppy drive interface, green PC connector, IDE
Options    interfaces (2), parallel port, serial ports (2), PISA slot
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  Floppy drive interface      CN1       Power LED & keylock       JW1

  Parallel port               CN2       Speaker                   JW2

  IDE interface 2             CN3       Turbo LED                 JW3

  IDE interface 1             CN4       Turbo switch              JW4

  Serial port 2                J3       Reset switch              JW5

  Serial port 1                J4       32-bit PCI slots        PC1 - PC3

  IDE interface LED           JP16      PISA slot                 SL1

  External battery            JP18

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     Factory configured - do not            JP12           pins 1 & 2
      alter                                                   closed

     Factory configured - do not            JP13              Open
      alter

     Factory configured - do not            JP14              Open
      alter

     CMOS memory normal operation           JP17           pins 1 & 2
                                                              closed

      CMOS memory clear                      JP17           pins 2 & 3
                                                              closed

  Note: The location of jumpers JP12 and JP14 are unidentified.

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       1MB        (1) 256K x 36         NONE

       2MB        (1) 512K x 36         NONE

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

       3MB        (1) 256K x 36    (1) 512K x 36

       3MB        (1) 512K x 36    (1) 256K x 36

       4MB         (1) 1M x 36          NONE

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

       5MB        (1) 256K x 36     (1) 1M x 36

       5MB         (1) 1M x 36     (1) 256K x 36

       6MB        (1) 512K x 36     (1) 1M x 36

       6MB         (1) 1M x 36     (1) 512K x 36

       8MB         (1) 2M x 36          NONE

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

       9MB        (1) 256K x 36     (1) 2M x 36

       9MB         (1) 2M x 36     (1) 256K x 36

      10MB        (1) 512K x 36     (1) 2M x 36

      10MB         (1) 2M x 36     (1) 512K x 36

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

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

      16MB         (1) 4M x 36          NONE

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

      17MB        (1) 256K x 36     (1) 4M x 36

      17MB         (1) 4M x 36     (1) 256K x 36

      18MB        (1) 512K x 36     (1) 4M x 36

      18MB         (1) 4M x 36     (1) 512K x 36

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

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

      24MB         (1) 2M x 36      (1) 4M x 36

      24MB         (1) 4M x 36      (1) 2M x 36

      32MB         (1) 8M x 36          NONE

      32MB         (1) 4M x 36      (1) 4M x 36

      33MB        (1) 256K x 36     (1) 8M x 36

      33MB         (1) 8M x 36     (1) 256K x 36

            DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1

      34MB        (1) 512K x 36     (1) 8M x 36

      34MB         (1) 8M x 36     (1) 512K x 36

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

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

      40MB         (1) 2M x 36      (1) 8M x 36

      40MB         (1) 8M x 36      (1) 2M x 36

      48MB         (1) 4M x 36      (1) 8M x 36

      48MB         (1) 8M x 36      (1) 4M x 36

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

                            CACHE CONFIGURATION

          Size                    Bank 0                    TAG

          128KB                (4) 32K x 8         (1) 16K or (1) 32K x 8

          256KB                (4) 64K x 8         (1) 16K or (1) 32K x 8

        CACHE JUMPER CONFIGURATION

        Size                 JP3

        128KB         pins 1 & 2 closed

        256KB         pins 2 & 3 closed

                          CPU TYPE CONFIGURATION

       Type                JP5               JP8               JP9

      80486SX             Open              Open               Open

    SL AM486DX          pins 2 & 3          Open            pins 1 & 2
                         closed                               closed

      80486DX             Open              Open               Open

     CX486DX2           pins 1 & 2          Open            pins 2 & 3
                         closed                               closed

     AM486DX2             Open             Closed              Open

     80486DX2             Open              Open               Open

     CX486DX4           pins 1 & 2          Open            pins 2 & 3
                         closed                               closed

     AM486DX4             Open              Open               Open

     80486DX4             Open              Open               Open

       CX M1            pins 2 & 3          Open            pins 1 & 2
                         closed                               closed

       P24D             pins 2 & 3          Open            pins 1 & 2
                         closed                               closed

       P24T               Open              Open               Open

                          CPU TYPE CONFIGURATION

       Type             RJ1                RJ2                 RJ3

     80486SX         pins 1 - 8         Installed         Not installed
                       closed

    SL AM486DX       pins 3 - 10        Installed         Not installed
                       closed

     80486DX         pins 1 - 8         Installed         Not installed
                       closed

     CX486DX2        pins 1 - 8       Not installed         Installed
                       closed

     AM486DX2        pins 1 - 8         Installed         Not installed
                       closed

     80486DX2        pins 1 - 8         Installed         Not installed
                       closed

     CX486DX4        pins 1 - 8       Not installed         Installed
                       closed

     AM486DX4        pins 1 - 8         Installed         Not installed
                       closed

     80486DX4        pins 1 - 8         Installed         Not installed
                       closed

      CX M1          pins 1 - 8         Installed         Not installed
                       closed

       P24D          pins 3 - 10        Installed         Not installed
                       closed

       P24T          pins 7 - 14        Installed         Not installed
                       closed

  Note: Pins designated should be in the closed position.

    CPU SPEED CONFIGURATION

   Speed      JP4       JP11

   25MHz      Open      Open

   33MHz     Closed    Closed

   40MHz     Closed     Open

  50iMHz      Open      Open

  66iMHz     Closed    Closed

  75iMHz      Open      Open

  80iMHz     Closed     Open

  100iMHz    Closed    Closed

  120iMHz    Closed     Open

                  CPU VOLTAGE CONFIGURATION

       Voltage               JP1                  JP2

        3.45v          pins 1 & 2 closed   pins 2 & 3 closed

        3.6v           pins 2 & 3 closed   pins 2 & 3 closed

         4v            pins 4 & 5 closed   pins 2 & 3 closed

         5v            pins 1 & 2 closed   pins 1 & 2 closed

