
SILICON STAR INTERNATIONAL, INC.

PM4T (REV. 1.0)

Processor  80486SX/SL80486SX/AM486DX/CX486DX/80486DX/SL80486DX/CX486DX2/
           CX486DX2V/AM486DX2/(SL)AM486DX2/80486DX2/SL80486DX2/AM486DX4/
           80486DX4/P24D/Pentium Overdrive
Processor  25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       256MB
Onboard
DRAM
Cache      128/256KB
BIOS       Award
Dimensions 330mm x 218mm
I/O        32-bit PCI slots (4), floppy drive interface, green PC connector, IDE
Options    interfaces (2), parallel port, PS/2 mouse port, serial ports (2)
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  IDE interface 1            CN1       Speaker                    JW2

  IDE interface 2            CN2       Turbo LED                  JW3

  Parallel port              CN3       Turbo switch               JW4

  Floppy drive interface     CN4       Reset switch               JW5

  Serial port 1               J3       IDE interface LED          JW6

  Serial port 2               J4       IDE interface LED          JW7

  External battery           JP42      PS/2 mouse port            MS1

  Green PC connector         JP43      32-bit PCI slots         PC1 - PC4

  Power LED & keylock        JW1

  Note: The location of JP42 is unidentified.

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     Factory configured - do not             JP1              N/A
      alter

     CPU type select non 5v CPU             JP18         pins 3 & 5, 4 &
                                                             6 closed

      CPU type select 5v CPU                 JP18         pins 1 & 3, 2 &
                                                             4 closed

     Factory configured - do not            JP23              Open
      alter

     Factory configured - do not            JP25              Open
      alter

     Factory configured - do not            JP27              N/A
      alter

     Factory configured - do not            JP30              N/A
      alter

     Factory configured - do not            JP31              N/A
      alter

     Factory configured - do not            JP33              N/A
      alter

     CMOS memory normal operation           JP37           pins 1 & 2
                                                              closed

      CMOS memory clear                      JP37           pins 2 & 3
                                                              closed

     Factory configured - do not            JP51              Open
      alter

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

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

     2MB        (1) 512K x        NONE           NONE           NONE
                    36

     3MB        (1) 512K x     (1) 256K x        NONE           NONE
                    36             36

     3MB        (1) 256K x     (1) 256K x     (1) 256K x        NONE
                    36             36             36

     4MB        (1) 512K x     (1) 256K x     (1) 256K x        NONE
                    36             36             36

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

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

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

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

     5MB        (1) 512K x     (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     6MB       (1) 1M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

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

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

     7MB       (1) 1M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

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

     9MB       (1) 2M x 36     (1) 256K x        NONE           NONE
                                   36

     10MB      (1) 2M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     10MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36        NONE
                    36

     10MB       (1) 512K x    (1) 2M x 36        NONE           NONE
                    36

     11MB      (1) 2M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     12MB      (1) 1M x 36    (1) 2M x 36        NONE           NONE

     12MB      (1) 2M x 36    (1) 1M x 36        NONE           NONE

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

     14MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

     16MB      (1) 2M 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) 4M x 36     (1) 256K x        NONE           NONE
                                   36

     18MB      (1) 4M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     18MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36        NONE
                    36

     18MB       (1) 512K x    (1) 4M x 36        NONE           NONE
                    36

     19MB      (1) 4M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     20MB      (1) 1M x 36    (1) 2M x 36    (1) 2M x 36        NONE

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

     20MB      (1) 2M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

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

     24MB      (1) 2M x 36    (1) 4M x 36        NONE           NONE

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

     24MB      (1) 4M x 36    (1) 2M x 36        NONE           NONE

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

     26MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36
                    36

     28MB      (1) 1M x 36    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36

     28MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     32MB      (1) 4M 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

     33MB      (1) 8M x 36     (1) 256K x        NONE           NONE
                                   36

     34MB      (1) 8M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     34MB       (1) 512K x    (1) 4M x 36    (1) 4M x 36        NONE
                    36

     34MB       (1) 512K x    (1) 8M x 36        NONE           NONE
                    36

     35MB      (1) 8M x 36     (1) 256K x     (1) 256K x    (1) 256K 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

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

     40MB      (1) 2M x 36    (1) 4M x 36    (1) 4M x 36        NONE

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0        Bank 1         Bank 2         Bank 3

     40MB       (1) 2M x 36    (1) 8M x 36       NONE           NONE

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

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

     40MB       (1) 8M x 36    (1) 2M x 36       NONE           NONE

     44MB       (1) 8M x 36    (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

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

     48MB       (1) 8M x 36    (1) 2M x 36    (1) 2M x 36       NONE

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

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

     50MB        (1) 512K x    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36
                     36

     52MB       (1) 1M x 36    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

     56MB       (1) 2M x 36    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

     56MB       (1) 8M x 36    (1) 2M x 36    (1) 2M x 36    (1) 2M x 36

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

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

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

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

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

     66MB       (1) 16M x 36    (1) 256K x     (1) 256K x       NONE
                                   36             36

     66MB        (1) 512K x    (1) 8M x 36    (1) 8M x 36       NONE
                     36

     66MB        (1) 512K x    (1) 16M x 36      NONE           NONE
                     36

     67MB       (1) 16M x 36    (1) 256K x     (1) 256K x   (1) 256K x 36
                                   36             36

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

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

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

     72MB       (1) 2M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     72MB       (1) 2M x 36    (1) 16M x 36      NONE           NONE

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

     72MB       (1) 16M x 36   (1) 2M x 36       NONE           NONE

     76MB       (1) 16M x 36   (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

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

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

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

     80MB       (1) 16M x 36   (1) 2M x 36    (1) 2M x 36       NONE

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

     88MB       (1) 16M x 36   (1) 2M x 36    (1) 2M x 36    (1) 2M x 36

     96MB       (1) 8M x 36    (1) 16M x 36      NONE           NONE

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

     96MB       (1) 16M x 36   (1) 8M x 36       NONE           NONE

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

     98MB        (1) 512K x    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36
                     36

    100MB       (1) 1M x 36    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

    104MB       (1) 2M x 36    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

    112MB       (1) 4M x 36    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     112MB       (1) 16M x 36   (1) 4M x 36    (1) 4M x 36   (1) 4M x 36

     128MB       (1) 16M x 36   (1) 8M x 36    (1) 8M x 36       NONE

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

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

     130MB        (1) 512K x     (1) 16M x      (1) 16M x        NONE
                     36             36             36

     132MB       (1) 1M x 36     (1) 16M x      (1) 16M x        NONE
                                    36             36

     136MB       (1) 2M x 36     (1) 16M x      (1) 16M x        NONE
                                    36             36

     144MB       (1) 4M x 36     (1) 16M x      (1) 16M x        NONE
                                    36             36

     160MB       (1) 8M x 36     (1) 16M x      (1) 16M x        NONE
                                    36             36

     160MB       (1) 16M x 36   (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

     192MB       (1) 16M x 36    (1) 16M x      (1) 16M x        NONE
                                    36             36

     194MB        (1) 512K x     (1) 16M x      (1) 16M x    (1) 16M x 36
                     36             36             36

     196MB       (1) 1M x 36     (1) 16M x      (1) 16M x    (1) 16M x 36
                                    36             36

     200MB       (1) 2M x 36     (1) 16M x      (1) 16M x    (1) 16M x 36
                                    36             36

     208MB       (1) 4M x 36     (1) 16M x      (1) 16M x    (1) 16M x 36
                                    36             36

     224MB       (1) 8M x 36     (1) 16M x      (1) 16M x    (1) 16M x 36
                                    36             36

     256MB       (1) 16M x 36    (1) 16M x      (1) 16M x    (1) 16M x 36
                                    36             36

  Note: Board will accept x 32 SIMMs also.

                            CACHE CONFIGURATION

       Size              Bank 0            Bank 1              TAG

       128KB          (4) 32K x 8           NONE           (1) 8K or (1)
                                                             16K x 8

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

     256KB (B)        (4) 64K x 8           NONE          (1) 16K or (1)
                                                             32K x 8

                        CACHE JUMPER CONFIGURATION

      Size               JP2               JP3                 JP6

      128KB           pins 1 & 2        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

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

    256KB (B)         pins 1 & 2        pins 1 & 2      pins 2 & 3 closed
                       closed             closed

                          CPU TYPE CONFIGURATION

     Type           RN6         RN10         RN14         RN16       RN17

    80486SX         Not         1 - 8         Not          Not        9 -
                 installed                 installed    installed     16

   SL80486SX        Not         1 - 8         Not          Not        9 -
                 installed                 installed    installed     16

    AM486DX         Not         1 - 8        1 - 8         Not        5 -
                 installed                              installed     12

    CX486DX        1 - 8         Not         1 - 8         Not        1 -
                              installed                 installed     8

    80486DX         Not         1 - 8        1 - 8         Not        5 -
                 installed                              installed     12

   SL80486DX        Not         1 - 8        1 - 8         Not        5 -
                 installed                              installed     12

   CX486DX2        1 - 8         Not         1 - 8         Not        1 -
                              installed                 installed     8

   CX486DX2V       1 - 8         Not         1 - 8         Not        1 -
                              installed                 installed     8

   AM486DX2         Not         1 - 8        1 - 8         Not        5 -
                 installed                              installed     12

  (SL)AM486DX2      Not         1 - 8        1 - 8         Not        5 -
                 installed                              installed     12

   80486DX2         Not         1 - 8        1 - 8         Not        5 -
                 installed                              installed     12

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

     Type           RN6        RN10    RN14       RN16           RN17

  SL80486DX2        Not        1 - 8   1 - 8       Not          5 - 12
                 installed                      installed

   AM486DX4         Not        1 - 8   1 - 8       Not          5 - 12
                 installed                      installed

   80486DX4         Not        1 - 8   1 - 8       Not          5 - 12
                 installed                      installed

     P24D           Not        1 - 8   1 - 8      1 - 8           Not
                 installed                                    installed

     P24T           Not         3 -     3 -      9 - 16           Not
                 installed      10      10                    installed

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

        Type                JP13              JP24              JP32

       80486SX              Open              Open              Open

      SL80486SX             Open              Open              Open

       AM486DX           pins 1 & 2           Open              Open
                           closed

       CX486DX              Open              Open              Open

       80486DX              Open              Open              Open

      SL80486DX             Open              Open              Open

      CX486DX2              Open              Open              Open

      CX486DX2V             Open              Open              Open

      AM486DX2           pins 1 & 2           Open              Open
                           closed

    (SL)AM486DX2         pins 1 & 2           Open             Closed
                           closed

      80486DX2              Open              Open              Open

     SL80486DX2             Open              Open              Open

      AM486DX4           pins 1 & 2           Open              Open
                           closed

      80486DX4              Open              Open              Open

        P24D                Open           pins 1 & 2           Open
                                             closed

        P24T                Open              Open              Open

    CPU SPEED CONFIGURATION

   Speed      JP12      JP14

   25MHz      Open      Open

   33MHz     Closed    Closed

   40MHz      Open     Closed

  50iMHz      Open      Open

  66iMHz     Closed    Closed

  75iMHz      Open      Open

  80iMHz      Open     Closed

  100iMHz    Closed    Closed

                         CPU VOLTAGE CONFIGURATION

   Voltage       JP18          JP19       JP20        JP21        JP22

    3.3v      pins 3 & 5,     Closed      Open        Open        Open
                 4 & 6
                closed

    3.45v     pins 3 & 5,      Open      Closed       Open        Open
                 4 & 6
                closed

    3.6v      pins 3 & 5,      Open       Open       Closed       Open
                 4 & 6
                closed

     4v       pins 3 & 5,      Open       Open        Open       Closed
                 4 & 6
                closed

     5v       pins 1 & 3,      N/A         N/A         N/A         N/A
                 2 & 4
                closed

