
BCM ADVANCED RESEARCH, INC.

SILVER II AS500LP

Processor       80486SX/80487SX/80486DX/80486DX2/ODP586SX
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set        SIS
Max. onboard    64MB
DRAM
Cache           64/128/256KB
BIOS            AMI
Dimensions      330mm x 218mm
I/O Options     32-bit VESA riser card slot, floppy drive interface, ISA
                riser card slot, parallel port, PS/2 mouse port, PS/2
                keyboard port, serial ports (2), VGA port
NPU Options     None

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  VGA port                     C1       Power LED & keylock        J1

  Parallel port                C2       Turbo LED                  J3

  Serial port                  C3       Turbo switch               J4

  Serial port                  C4       Reset switch               J5

  PS/2 mouse                   C5       Speaker                    J9

  PS/2 keyboard                C6       ISA riser card slot        S1

  IDE interface                C7       32-bit VESA riser          S2
                                        card slot

  Floppy drive interface       C8

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Monitor type select color                JP6             Open

      Monitor type select monochrome           JP6            Closed

     CMOS memory normal operation             JP7             Open

      CMOS memory clear                        JP7            Closed

     Power good signal detect from            JP8           pins 1 & 2
      board                                                   closed

      Power good signal detect from            JP8           pins 2 & 3
      power supply                                            closed

     Factory configured - do not alter        JP14          pins 2 & 3
                                                              closed

     Factory configured - do not alter        JP15          pins 2 & 3
                                                              closed

     PQFP 80486SX disabled                   JP102          pins 1 & 2
                                                              closed

      PQFP 80486SX enabled                    JP102          pins 2 & 3
                                                              closed

     PS/2 mouse port enabled                 JP103          pins 1 & 2
                                                              closed

      PS/2 mouse port disabled                JP103          pins 2 & 3
                                                              closed

     IDE interface enabled                     S1           pins 1 & 2
                                                              closed

      IDE interface disabled                    S1           pins 2 & 3
                                                              closed

     Factory configured - do not alter         S2           pins 1 & 2
                                                              closed

     Factory configured - do not alter         S3           pins 1 & 2
                                                              closed

     Factory configured - do not alter         S4           pins 2 & 3
                                                              closed

                            I/O JUMPER CONFIGURATION

  Floppy(C8)     C3         C4         C2      JP20   JP19   JP18   JP17   JP16

   Enabled      COM1       COM2       LPT2      1 &    2 &   2 &    1 &    1 &
                                                2      3      3      2      2

   Enabled      COM1       COM2       LPT1      1 &    2 &   2 &    1 &    2 &
                                                2      3      3      2      3

   Enabled      COM3       COM4       LPT1      1 &    2 &   2 &    2 &    1 &
                                                2      3      3      3      2

   Enabled      COM2       COM3       LPT2      1 &    2 &   2 &    2 &    2 &
                                                2      3      3      3      3

  Disabled      COM1       COM2       LPT2      2 &    1 &   2 &    1 &    1 &
                                                3      2      3      2      2

  Disabled      COM1       COM2       LPT1      2 &    1 &   2 &    1 &    2 &
                                                3      2      3      2      3

  Disabled      COM3       COM4       LPT1      2 &    1 &   2 &    2 &    1 &
                                                3      2      3      3      2

  Disabled      COM2       COM3       LPT2      2 &    1 &   2 &    2 &    2 &
                                                3      2      3      3      3

   Enabled     Disabled  Disabled   Disabled    2 &    2 &   2 &    2 &    1 &
                                                3      3      3      3      2

  Disabled     Disabled  Disabled   Disabled    2 &    2 &   2 &    2 &    2 &
                                                3      3      3      3      3

  Note:Pins designated should be in the closed position.

                     ONBOARD VGA JUMPER CONFIGURATION

  Onboard VGA port       T2JP1              T2JP2             T2JP3

      Enabled          pins 1 & 2         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

     Disabled          pins 3 & 4         pins 3 & 4        pins 3 & 4
                         closed            closed             closed

                 VGA WAIT STATE CONFIGURATION

     Wait State              JP12                JP13

      0 (25MHz)        pins 2 & 3 closed   pins 2 & 3 closed

      1 (33MHz)        pins 2 & 3 closed   pins 1 & 2 closed

      2 (40MHz)        pins 1 & 2 closed   pins 2 & 3 closed

      3 (50MHz)        pins 1 & 2 closed   pins 1 & 2 closed

                            DRAM CONFIGURATION

   Size     Bank 0   Bank 1    Bank 2     Bank3      JP100       JP101

   1MB      256K x    NONE      NONE       NONE       Open        Open
              36

   2MB      256K x    256K x    NONE       NONE       Open        Open
              36       36

   2MB      512K x    NONE      NONE       NONE     pins 1 &      Open
              36                                       2

   4MB      1M x 36   NONE      NONE       NONE       Open        Open

   6MB      256K x    256K x   1M x 36     NONE       Open        Open
              36       36

   6MB      512K x    NONE     1M x 36     NONE     pins 1 &      Open
              36                                       2

   8MB      1M x 36  1M x 36    NONE       NONE       Open        Open

   8MB      2M x 36   NONE      NONE       NONE     pins 1 &      Open
                                                       2

   10MB     256K x    256K x   1M x 36   1M x 36      Open        Open
              36       36

   10MB     512K x    NONE     1M x 36   1M x 36    pins 1 &      Open
              36                                       2

   12MB     1M x 36  1M x 36   1M x 36     NONE       Open        Open

   12MB     2M x 36   NONE     1M x 36     NONE     pins 1 &      Open
                                                       2

   16MB     1M x 36  1M x 36   1M x 36   1M x 36      Open        Open

   16MB     2M x 36   NONE     1M x 36   1M x 36    pins 1 &      Open
                                                       2

   16MB     2M x 36  2M x 36    NONE       NONE     pins 2 &     Closed
                                                       3

   16MB     4M x 36   NONE      NONE       NONE       Open        Open

   18MB     256K x    256K x    256K x     NONE       Open        Open
              36       36        36

   18MB     512K x    NONE     4M x 36     NONE     pins 1 &      Open
              36                                       2

   20MB     1M x 36  4M x 36    NONE       NONE       Open        Open

   24MB     1M x 36  1M x 36   4M x 36     NONE       Open        Open

   24MB     2M x 36   NONE     4M x 36     NONE     pins 1 &      Open
                                                       2

   32MB     4M x 36  4M x 36    NONE       NONE       Open        Open

   32MB     8M x 36   NONE      NONE       NONE     pins 1 &      Open
                                                       2

   36MB     1M x 36  4M x 36   4M x 36     NONE       Open        Open

   40MB     1M x 36  1M x 36   4M x 36   4M x 36      Open        Open

   40MB     2M x 36   NONE     4M x 36   4M x 36    pins 1 &      Open
                                                       2

   40MB     2M x 36  8M x 36    NONE       NONE     pins 2 &     Closed
                                                       3

   48MB     4M x 36  4M x 36   4M x 36     NONE       Open        Open

   48MB     8M x 36   NONE     4M x 36     NONE     pins 1 &      Open
                                                       2

   64MB     4M x 36  4M x 36   4M x 36   4M x 36      Open        Open

   64MB     8M x 36  8M x 36    NONE       NONE     pins 2 &     Closed
                                                       3

   64MB     8M x 36   NONE     4M x 36   4M x 36    pins 1 &      Open
                                                       2

  Note:Pins designated should be in the closed position.

            CACHE CONFIGURATION

     Size          Cache        Location

     64KB        (8) 8K x 8    Banks 0 & 1

     128KB       (4) 32K x 8     Bank 0

     256KB       (8) 32K x 8   Banks 0 & 1

                        CACHE JUMPER CONFIGURATION

    Size         SR1          SR2         SR3         SR4         SR5

    64KB       pins 1 &     pins 1 &    pins 2 &    pins 1 &   pins 1 & 2
                  2            2           3           2

    128KB      pins 1 &     pins 2 &    pins 1 &    pins 1 &   pins 2 & 3
                  2            3           2           2

    256KB      pins 2 &     pins 2 &    pins 2 &    pins 2 &   pins 2 & 3
                  3            3           3           3

                          CPU TYPE CONFIGURATION

     Jumper        80486DX/80486DX2       80486SX       80487SX/ODP586SX

     T3JP1A             Closed              Open              Open

     T3JP1B              Open              Closed             Open

     T3JP1C              Open               Open             Closed

     T3JP2A             Closed              Open              Open

     T3JP2B              Open              Closed             Open

     T3JP2C              Open               Open             Closed

     T3JP3A             Closed              Open              Open

     T3JP3B              Open              Closed             Open

     T3JP3C              Open               Open             Closed

                       CPU SPEED CONFIGURATION

  CPU speed        JP1           JP2           JP3           JP4

    20MHz       pins 2 & 3    pins 2 & 3    pins 2 & 3    pins 2 & 3

  25/50i MHz    pins 2 & 3    pins 2 & 3    pins 1 & 2    pins 1 & 2

  33/66i MHz    pins 1 & 2    pins 2 & 3    pins 1 & 2    pins 1 & 2

    40MHz       pins 1 & 2    pins 1 & 2    pins 2 & 3    pins 2 & 3

    50MHz       pins 2 & 3    pins 2 & 3    pins 1 & 2    pins 2 & 3

                       VESA LOCAL BUS CONFIGURATION

    CPU speed         Wait states           JP9                JP10

     <=33MHz         0 wait states       pins 1 & 2         pins 1 & 2
                                           closed             closed

      >33MHz         1 wait state        pins 2 & 3         pins 2 & 3
                                           closed             closed

