
SILICON STAR INTERNATIONAL, INC.

486 VESA AG4

Processor  CX486SX/80486SX/80487SX/CX486DX/80486DX/80486DX2/Pentium Overdrive
Processor  20/25/33/40(internal)/50(internal)/50/66(internal)/75(internal)/83(internal)/
Speed      100(internal)MHz
Chip Set   SIS
Max.       128MB
Onboard
DRAM
Cache      128/256/512KB
BIOS       AMI/Award
Dimensions 260mm x 220mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  External battery           J1       Reset switch                 J6

  Turbo switch               J3       Power LED & keylock          J7

  Turbo LED                  J4       Green PC connector          JP45

  Speaker                    J5       32-bit VESA Local bus    SL1 - SL3
                                      slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not              J2              Open
      alter

     Turbo mode enabled                       J3           pins 2 & 3
                                                              closed

      Turbo mode disabled                      J3           pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP16          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP16          pins 2 & 3
                                                              closed

     Monitor type select color               JP17            Closed

      Monitor type select monochrome          JP17             Open

     Enter break switch                      JP19          pins 1 & 2
                                                              closed

      Leave break switch                      JP19          pins 2 & 3
                                                              closed

     Factory configured - do not             JP23          pins 1 & 2
      alter                                                   closed

     Suspend mode disabled                   JP26             Open

      Suspend mode enabled                    JP26            Closed

     Factory configured - do not             JP30             Open
      alter

     Factory configured - do not             JP31             Open
      alter

     Factory configured - do not             JP42            Closed
      alter

  Note: The location of JP23 & JP26 is unidentified.

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB             NONE             NONE        (1) 256K x 36

       1MB         (4) 256K x 9         NONE            NONE

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

       2MB             NONE             NONE        (1) 512K x 36

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

       4MB             NONE             NONE         (1) 1M x 36

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

       4MB          (4) 1M x 9          NONE            NONE

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

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

       6MB          (4) 1M x 9     (1) 256K x 36    (1) 256K x 36

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

       6MB         (4) 256K x 9     (1) 1M x 36     (1) 256K x 36

       8MB          (4) 1M x 9     (1) 512K x 36    (1) 512K x 36

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

       8MB             NONE             NONE         (1) 2M x 36

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

      10MB         (4) 256K x 9     (1) 2M x 36     (1) 256K x 36

      12MB          (4) 1M x 9          NONE         (1) 2M x 36

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

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

      16MB             NONE             NONE         (1) 4M x 36

      16MB          (4) 1M x 9      (1) 2M x 36      (1) 1M x 36

      16MB          (4) 1M x 9      (1) 1M x 36      (1) 2M x 36

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

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

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

      18MB          (4) 4M x 9     (1) 256K x 36    (1) 256K x 36

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

      18MB         (4) 256K x 9     (1) 4M x 36     (1) 256K x 36

      20MB          (4) 4M x 9     (1) 512K x 36    (1) 512K x 36

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

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

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

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

      32MB             NONE             NONE         (1) 8M x 36

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

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

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

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

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

      40MB          (4) 1M x 9      (1) 8M x 36      (1) 1M x 36

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

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

      48MB          (4) 4M x 9      (1) 4M x 36      (1) 4M x 36

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

      64MB             NONE             NONE        (1) 16M x 36

      64MB          (4) 4M x 9      (1) 4M x 36      (1) 8M x 36

      64MB         (4) 16M x 9          NONE            NONE

      64MB          (4) 4M x 9      (1) 8M x 36      (1) 4M x 36

      64MB         (4) 16M x 9          NONE            NONE

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

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

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

      72MB         (4) 16M x 9      (1) 1M x 36      (1) 1M x 36

      72MB          (4) 1M x 9      (1) 16M x 36     (1) 1M x 36

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

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

      96MB         (4) 16M x 9      (1) 4M x 36      (1) 4M x 36

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

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

                         DRAM JUMPER CONFIGURATION

   Bank 0       Bank 1      Bank 2        JP33        JP34        JP35

  SIMM 1-4      SIMM 6       SIMM 5       Open       1 & 2        Open
                 (S)          (S)

  SIMM 1-4      SIMM 6       SIMM 5       Open       1 & 2       Closed
                 (D)          (S)

  SIMM 1-4      SIMM 6       SIMM 5      2 & 3       1 & 2        Open
                 (S)          (D)

  SIMM 6 (S)    SIMM 5     SIMM 1-4      1 & 2       2 & 3        Open
                 (S)

  SIMM 6 (D)    SIMM 5     SIMM 1-4      1 & 2       2 & 3        Open
                 (D)

  SIMM 6 (D)    SIMM 5       NONE        1 & 2       2 & 3        Open
                 (S)

  SIMM 6 (D)    SIMM 5     SIMM 1-4      1 & 2       2 & 3        Open
                 (D)

  Note:Pins designated should be in the closed positon.

                     DRAM JUMPER CONFIGURATION (CONT)

   Bank 0       Bank 1      Bank 2        JP36        JP37        JP38

  SIMM 1-4      SIMM 6       SIMM 5      2 & 3        Open        2 & 3
                 (S)          (S)

  SIMM 1-4      SIMM 6       SIMM 5      2 & 3       2 & 3        Open
                 (D)          (S)

  SIMM 1-4      SIMM 6       SIMM 5      2 & 3        Open        2 & 3
                 (S)          (D)

  SIMM 6 (S)    SIMM 5     SIMM 1-4      1 & 2       1 & 2        1 & 2
                 (S)

  SIMM 6 (D)    SIMM 5     SIMM 1-4      1 & 2       1 & 2        1 & 2
                 (D)

  SIMM 6 (D)    SIMM 5       NONE        1 & 2       1 & 2        1 & 2
                 (S)

  SIMM 6 (D)    SIMM 5     SIMM 1-4      1 & 2       1 & 2        1 & 2
                 (D)

  Note:Pins designated should be in the closed positon.

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

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

                 CACHE JUMPER CONFIGURATION

   Size       JP1       JP2       JP4       JP40      JP41

  128KB      1 & 2     1 & 2     1 & 2     1 & 2     1 & 2

  256KB      2 & 3     2 & 3     1 & 2     2 & 3     1 & 2

  256KB      1 & 2     2 & 3     1 & 2     1 & 2     1 & 2

  512KB      2 & 3     2 & 3     2 & 3     2 & 3     2 & 3

  512KB      1 & 2     2 & 3     2 & 3     1 & 2     1 & 2

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

    Type       JP8    JP9      JP10   JP11    JP12   JP13    JP14   JP15

   CX486SX     2 &    Open     2 &    Open    2-3,   Open    1-2,   2 & 3
               3                3             4-5            3-4

    486SX      2 &    Open     2 &    Open    Open   Open    Open   Open
               3                3

    486SL      1 &   Closed    2 &     2 &    3 &    Open    2 &    4 & 5
               2                3      3       4              3

   CX486DX     1 &   Closed    2 &     2 &    2 &    Open    1-2,   2 & 3
               2                3      3       3             3-4

  486DX/DX2    1 &   Closed    2 &     2 &    Open   Open    Open   Open
               2                3      3

   486DX4      1 &   Closed    2 &     2 &    3 &    Open    2 &    4 & 5
               2                3      3       4              3

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

    Type       JP21     JP22    JP24     JP25     JP46     JP48     JP50

   CX486SX    1 & 2    2 & 3    2 & 3    2 & 3   1 & 2    2 & 3    2 & 3

    486SX     2 & 3    1 & 2    1 & 2    Open    2 & 3    2 & 3    2 & 3

    486SL     2 & 3    1 & 2    Open     Open    2 & 3    2 & 3    2 & 3

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

  486DX/DX2   2 & 3    1 & 2    1 & 2    Open    2 & 3    2 & 3    2 & 3

   486DX4     2 & 3    1 & 2    Open     Open    2 & 3    1 & 2    1 & 2

  Note: Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

  Speed     JP5      JP6      JP7     JP20    JP32     JP47   JP49   JP51

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

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

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

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

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

  50MHz    Open      Open    Closed    1 &   Closed    Open   Open   Open
                                       2

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

  Note: Pins designated should be in the closed position.

                    CPU SPEED CONFIGURATION (DX4 ONLY)

   Speed       JP5     JP6      JP7     JP20   JP32   JP47   JP49   JP51

  25/75MHz    Closed  Closed    Open     1 &   Open   2 &    1 &    Open
                                         2             3      2

  33/83MHz    Open    Closed   Closed    1 &   Open   2 &    Open   Closed
                                         2             3

  33/100MHz   Open    Closed   Closed    1 &   Open   1 &    1 &    Open
                                         2             2      2

  50/100MHz   Open     Open    Closed    1 &   Open   1 &    2 &    Open
                                         2             2      3

  Note: Pins designated should be in the closed position.

      VESA WAIT STATE CONFIGURATION

     Wait states             JP28

    0 wait states     pins 1 & 2 closed

    1 wait state      pins 2 & 3 closed

       VESA BUS SPEED CONFIGURATION

      CPU speed              JP29

      < = 33MHz       pins 1 & 2 closed

       > 33MHz        pins 2 & 3 closed

            GREEN PC CONFIGURATION

      Description               JP45

  Control video HSYNC          pin 1

        Ground                 pin 2

  Control video VSYNC          pin 3

        Ground                 pin 4

    Control ENVIDEO            pin 5

        Ground                 pin 6

   Monitor AC power            pin 7

        Ground                 pin 8

