
SILICON STAR INTERNATIONAL, INC.

AN4R2/AN4TR2 REV. 1.1 & REV. 1.2

Processor  SL80486SX/80486SX/CX486DX/SL80486DX/80486DX/CX486DX2/AM486DX2/SL80486DX2/80486DX2/80486DX4
Processor  20/25/33/40/50(internal)/66(internal)/75(internal)/83(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       128MB
Onboard
DRAM
Cache      128/256/512KB
BIOS       AMI/Award
Dimensions 330mm x 218mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location      Purpose              Location

  External battery           JP25        Reset switch            JW3

  Green PC connector     JP46 pins 1 -   Turbo switch            JW4
  (monitor)                   3

  Green PC connector     JP46 pins 7 &   Turbo LED               JW5
                              8

  Power LED & keylock        JW1         32-bit VESA local    SL1 - SL3
                                         bus slots

  Speaker                    JW2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             JP3           pins 2 & 3
      alter                                                   closed

     Factory configured - do not             JP4           pins 1 & 2
      alter                                                   closed

     Factory configured - do not             JP6              N/A
      alter

     Factory configured - do not             JP13            Closed
      alter

     Factory configured - do not             JP14          pins 1 & 2
      alter                                                   closed

     Factory configured - do not             JP15             Open
      alter

     Factory configured - do not             JP16            Closed
      alter

     CMOS memory normal operation            JP21          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP21          pins 2 & 3
                                                              closed

     Factory configured - do not             JP41             Open
      alter

     Factory configured - do not             JP49          pins 1 & 2
      alter                                                   closed

     Factory configured - do not             JP52             N/A
      alter

     Factory configured - do not             JP60             N/A
      alter

     Factory configured - do not             JP62             N/A
      alter

                            DRAM CONFIGURATION

     Size       SIMM 1 - 4     SIMM 5 - 8       SIMM 9         SIMM 10

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

     1MB       (4) 256K x 9       NONE           NONE           NONE

     1MB       (4) 256K x 9       NONE           NONE           NONE

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

     2MB       (4) 256K x 9       NONE           NONE       (1) 256K x 36

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

     2MB       (4) 256K x 9   (4) 256K x 9       NONE           NONE

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

     4MB        (4) 1M x 9        NONE           NONE           NONE

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

     4MB       (4) 256K x 9       NONE        (1) 512K x    (1) 256K x 36
                                                  36

     4MB       (4) 256K x 9   (4) 256K x 9    (1) 512K x        NONE
                                                  36

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

     5MB       (4) 256K x 9       NONE           NONE        (1) 1M x 36

     6MB        (4) 1M x 9        NONE        (1) 256K x    (1) 256K x 36
                                                  36

     6MB       (4) 256K x 9       NONE       (1) 1M x 36    (1) 256K x 36

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

     6MB       (4) 256K x 9   (4) 256K x 9   (1) 1M x 36        NONE

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

     8MB        (4) 1M x 9        NONE           NONE        (1) 1M x 36

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

     8MB        (4) 1M x 9        NONE        (1) 512K x    (1) 512K x 36
                                                  36

     8MB        (4) 1M x 9     (4) 1M x 9        NONE           NONE

     10MB       (4) 1M x 9     (4) 1M x 9     (1) 256K x    (1) 256K x 36
                                                  36

     10MB      (4) 256K x 9   (4) 256K x 9   (1) 1M x 36     (1) 1M x 36

     12MB       (4) 1M x 9        NONE       (1) 1M x 36     (1) 1M x 36

                        DRAM CONFIGURATION (CONT)

     Size       SIMM 1 - 4     SIMM 5 - 8       SIMM 9         SIMM 10

     12MB       (4) 1M x 9        NONE       (1) 1M x 36     (1) 1M x 36

     12MB       (4) 1M x 9     (4) 1M x 9     (1) 512K x    (1) 512K x 36
                                                  36

     12MB       (4) 1M x 9     (4) 1M x 9    (1) 1M x 36        NONE

     16MB       (4) 1M x 9     (4) 1M x 9    (1) 1M x 36     (1) 1M x 36

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

     16MB       (4) 4M x 9        NONE           NONE           NONE

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

     16MB       (4) 1M x 9     (4) 1M x 9    (1) 1M x 36     (1) 1M x 36

     16MB       (4) 4M x 9        NONE           NONE           NONE

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

     17MB      (4) 256K x 9       NONE           NONE        (1) 4M x 36

     18MB       (4) 4M x 9        NONE        (1) 256K x    (1) 256K x 36
                                                  36

     18MB      (4) 256K x 9       NONE       (1) 4M x 36    (1) 256K x 36

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

     18MB      (4) 256K x 9   (4) 256K x 9   (1) 4M x 36        NONE

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

     20MB       (4) 1M x 9        NONE           NONE        (1) 4M x 36

     20MB       (4) 4M x 9        NONE        (1) 512K x    (1) 512K x 36
                                                  36

     24MB       (4) 4M x 9        NONE       (1) 1M x 36     (1) 1M x 36

     24MB       (4) 1M x 9        NONE       (1) 4M x 36     (1) 1M x 36

     24MB       (4) 1M x 9     (4) 4M x 9     (1) 512K x    (1) 512K x 36
                                                  36

     24MB       (4) 1M x 9     (4) 1M x 9    (1) 4M x 36        NONE

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

     32MB       (4) 4M x 9        NONE           NONE        (1) 4M x 36

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

     32MB       (4) 4M x 9     (4) 4M x 9        NONE           NONE

     36MB       (4) 4M x 9        NONE       (1) 1M x 36     (1) 4M x 36

     36MB       (4) 1M x 9        NONE       (1) 4M x 36     (1) 4M x 36

     36MB       (4) 4M x 9     (4) 4M x 9     (1) 512K x    (1) 512K x 36
                                                  36

     36MB       (4) 1M x 9        NONE       (1) 8M x 36        NONE

     36MB       (4) 1M x 9     (4) 4M x 9    (1) 4M x 36        NONE

     40MB       (4) 4M x 9     (4) 4M x 9    (1) 1M x 36     (1) 1M x 36

     40MB       (4) 1M x 9        NONE       (1) 8M x 36     (1) 1M x 36

     40MB       (4) 1M x 9     (4) 1M x 9    (1) 8M x 36        NONE

     40MB       (4) 1M x 9     (4) 1M x 9    (1) 4M x 36     (1) 4M x 36

     48MB       (4) 4M x 9        NONE       (1) 4M x 36     (1) 4M x 36

     48MB       (4) 4M x 9        NONE       (1) 4M x 36     (1) 4M x 36

     48MB       (4) 4M x 9        NONE       (1) 8M x 36        NONE

     48MB       (4) 4M x 9     (4) 4M x 9    (1) 4M x 36        NONE

     64MB       (4) 4M x 9     (4) 4M x 9    (1) 4M x 36     (1) 4M x 36

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

     64MB      (4) 16M x 9        NONE           NONE           NONE

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

     64MB       (4) 4M x 9        NONE       (1) 8M x 36     (1) 4M x 36

                        DRAM CONFIGURATION (CONT)

     Size        SIMM 1 - 4     SIMM 5 - 8      SIMM 9         SIMM 10

     64MB        (4) 4M x 9     (4) 4M x 9    (1) 8M x 36        NONE

     64MB        (4) 4M x 9     (4) 4M x 9    (1) 4M x 36    (1) 4M x 36

     64MB        (4) 16M x 9       NONE          NONE            NONE

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

     65MB        (4) 256K x 9      NONE          NONE        (1) 16M x 36

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

     68MB        (4) 1M x 9        NONE          NONE        (1) 16M x 36

     68MB        (4) 1M x 9     (4) 16M x 9      NONE            NONE

     72MB        (4) 16M x 9       NONE       (1) 1M x 36    (1) 1M x 36

     72MB        (4) 1M x 9        NONE       (1) 16M x 36   (1) 1M x 36

     72MB        (4) 1M x 9     (4) 1M x 9    (1) 16M x 36       NONE

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

     80MB        (4) 4M x 9        NONE          NONE        (1) 16M x 36

     80MB        (4) 4M x 9     (4) 16M x 9      NONE            NONE

     96MB        (4) 16M x 9       NONE       (1) 4M x 36    (1) 4M x 36

     96MB        (4) 4M x 9        NONE       (1) 16M x 36   (1) 4M x 36

     96MB        (4) 4M x 9     (4) 4M x 9    (1) 16M x 36       NONE

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

     128MB       (4) 16M x 9       NONE          NONE        (1) 16M x 36

     128MB       (4) 16M x 9    (4) 16M x 9      NONE            NONE

                         DRAM JUMPER CONFIGURATION

  Bank 0   Bank 1   Bank 2   Bank 3   JP18     JP19      JP20      JP22

  SIMM 1   SIMM 5   SIMM 9    SIMM   1 & 2    1 & 2      Open      1 & 2
   - 4      - 8               10

  SIMM 1   SIMM 5   SIMM 9   NONE    1 & 2    1 & 2      Open      1 & 2
   - 4      - 8

  SIMM 1   SIMM 9   NONE     NONE    1 & 2     Open      Open      1 & 2
   - 4

  SIMM 1    SIMM    SIMM 9   NONE    1 & 2     Open      Open      1 & 2
   - 4      10

  SIMM 9    SIMM    SIMM 1   SIMM 5  2 & 3    2 & 3      Open      2 & 3
            10       - 4      - 8

  SIMM 9    SIMM    NONE     NONE     Open     Open     Closed     2 & 3
            10

  SIMM 1    SIMM    SIMM 9   NONE    1 & 2     Open      Open      1 & 2
   - 4      10

  SIMM 9    SIMM    SIMM 1   SIMM 5  2 & 3    2 & 3      Open      2 & 3
            10       - 4      - 8

  Note: Pins designated should be in the closed position.

                     DRAM JUMPER CONFIGURATION (CONT)

  Bank 0   Bank 1   Bank 2   Bank 3   JP23     JP24      JP50      JP51

  SIMM 1   SIMM 5   SIMM 9    SIMM    Open    1 & 2      Open      Open
   - 4      - 8               10

  SIMM 1   SIMM 5   SIMM 9   NONE    1 & 2     Open      Open      Open
   - 4      - 8

  SIMM 1   SIMM 9   NONE     NONE    2 & 3     Open      Open      Open
   - 4

  SIMM 1    SIMM    SIMM 9   NONE    1 & 2    2 & 3      Open      Open
   - 4      10

  SIMM 9    SIMM    SIMM 1   SIMM 5   Open    2 & 3     Closed     2 & 3
            10       - 4      - 8

  SIMM 9    SIMM    NONE     NONE    2 & 3     Open      Open      1 & 2
            10

  SIMM 1    SIMM    SIMM 9   NONE    1 & 2    2 & 3      Open      Open
   - 4      10

  SIMM 9    SIMM    SIMM 1   SIMM 5   Open    2 & 3      Open      Open
            10       - 4      - 8

  Note: Pins designated should be in the closed position.

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

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

                        CACHE JUMPER CONFIGURATION

    Size           JP1            JP2            JP42           JP44

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

    256KB       pins 2 & 3     pins 2 & 3     pins 1 & 2      pins 2 & 3
                 closed          closed         closed         closed

    256KB       pins 1 & 2     pins 1 & 2     pins 1 & 2      pins 2 & 3
                 closed          closed         closed         closed

    512KB       pins 1 & 2     pins 1 & 2     pins 2 & 3      pins 2 & 3
                 closed          closed         closed         closed

                          CPU TYPE CONFIGURATION

      Type           JP9       JP12       JP30       JP31         JP33

    SL80486SX       2 & 3     2 & 3       2 & 3      Open         Open

     80486SX        2 & 3     2 & 3       2 & 3      Open         Open

     CX486DX        2 & 3     2 & 3       1 & 2      3 & 4       Closed

    SL80486DX       2 & 3     2 & 3       1 & 2      3 & 4       Closed

     80486DX        2 & 3     2 & 3       1 & 2      3 & 4       Closed

    CX486DX2        1 & 2     1 & 2       1 & 2      3 & 4       Closed

    AM486DX2        1 & 2     1 & 2       1 & 2      3 & 4       Closed

   SL80486DX2       2 & 3     2 & 3       1 & 2      3 & 4       Closed

    80486DX2        2 & 3     2 & 3       1 & 2      3 & 4       Closed

    80486DX4        1 & 2     1 & 2       1 & 2      3 & 4       Closed

            Note: Pins designated should be in the closed position. The
            80486DX4 CPU is only available on the AN4TR2 mainboard.

                      CPU TYPE CONFIGURATION (CONT)

        Type            JP34          JP35         JP36          JP38

     SL80486SX          4 & 5        3 & 4         2 & 3         Open

      80486SX           4 & 5        3 & 4         2 & 3         Open

      CX486DX           2 & 3        2 & 3       1 & 2, 3 &      2 & 3
                                                     4

     SL80486DX          4 & 5        3 & 4         2 & 3         Open

      80486DX           4 & 5        3 & 4         2 & 3         Open

      CX486DX2          2 & 3        2 & 3         1 & 2         2 & 3

      AM486DX2          4 & 5        3 & 4         2 & 3         Open

     SL80486DX2         4 & 5        3 & 4         2 & 3         Open

      80486DX2          4 & 5        3 & 4         2 & 3         Open

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

            Note: Pins designated should be in the closed position. The
            80486DX4 CPU is only available on the AN4TR2 mainboard.

                      CPU TYPE CONFIGURATION (CONT)

      Type           JP39       JP43        JP47       JP48       JP63

    SL80486SX        Open       2 & 3      2 & 3      1 & 2       Open

     80486SX         Open       2 & 3      2 & 3      1 & 2       Open

     CX486DX        2 & 3       1 & 2      1 & 2      2 & 3       Open

    SL80486DX        Open       2 & 3      2 & 3      1 & 2       Open

     80486DX         Open       2 & 3      2 & 3      1 & 2       Open

    CX486DX2        2 & 3       1 & 2      1 & 2      2 & 3       Open

    AM486DX2         Open       2 & 3      2 & 3      1 & 2       1 & 2

   SL80486DX2        Open       2 & 3      2 & 3      1 & 2       Open

    80486DX2         Open       2 & 3      2 & 3      1 & 2       Open

    80486DX4         Open       2 & 3      2 & 3      1 & 2       Open

            Note: Pins designated should be in the closed position. The
            80486DX4 CPU is only available on the AN4TR2 mainboard.

                  CPU SPEED CONFIGURATION (AVASEM AV9107)

   Speed     JP8     JP10     JP11     JP26      JP27     JP28     JP29

   20MHz     2 &     Open     Open    Closed     Open     1 & 2   Closed
              3

   25MHz     2 &     Open     Open     Open     Closed    1 & 2   Closed
              3

   33MHz     2 &     Open     Open    Closed    Closed    1 & 2    Open
              3

   40MHz     2 &     Open     Open     Open      Open     1 & 2   Closed
              3

  50iMHz     2 &     Open     Open     Open     Closed    1 & 2   Closed
              3

  66iMHz     2 &     Open     Open    Closed    Closed    1 & 2    Open
              3

  75iMHz     2 &     Open     1 & 2    Open     Closed    Open    Closed
              3

  83iMHz     2 &    Closed    Open    Closed    Closed    Open     Open
              3

  100iMHz    2 &     Open     1 & 2   Closed    Closed    Open     Open
              3

  Note: Pins designated should be in the closed position.

                     CPU SPEED CONFIGURATION (MX8315)

   Speed     JP8     JP10     JP11     JP26      JP27     JP28     JP29

   20MHz     1 &     Open     Open     Open      Open     1 & 2    Open
              2

   25MHz     1 &     Open     Open     Open     Closed    1 & 2    Open
              2

   33MHz     1 &     Open     Open    Closed    Closed    1 & 2   Closed
              2

   40MHz     1 &     Open     Open    Closed    Closed    1 & 2    Open
              2

  50iMHz     1 &     Open     Open     Open     Closed    1 & 2    Open
              2

  66iMHz     1 &     Open     Open    Closed    Closed    1 & 2   Closed
              2

  75iMHz     1 &     Open     1 & 2    Open     Closed    Open    Closed
              2

  83iMHz     1 &    Closed    Open    Closed    Closed    Open    Closed
              2

  100iMHz    1 &     Open     1 & 2   Closed    Closed    Open    Closed
              2

  Note: Pins designated should be in the closed position.

                         CPU VOLTAGE CONFIGURATION

    Voltage         JP53           JP54          JP55            JP56

     3.3v        pins 1 & 2        Open          Open            Open
                   closed

     3.45v          Open        pins 1 & 2       Open            Open
                                  closed

     3.6v           Open           Open        pins 1 & 2        Open
                                                closed

      4v            Open           Open          Open         pins 1 & 2
                                                                closed

         BUS SPEED CONFIGURATION

      CPU speed              JP7

      <= 33MHz        pins 1 & 2 closed

       > 33MHz        pins 2 & 3 closed

