YOUNG MICRO SYSTEMS, INC.

VS3486F/S-3VL

Processor        80386DX/80486DLC/80486SX/80486DX/80486DX2
Processor Speed  25/33/40/50(internal)/50/66MHz
Chip Set         Symphony
Max. Onboard DRAM32MB
Cache            64/256/1024KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      None
NPU Options      80387DX/80487SX

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Turbo switch               CN1       Power LED & keylock         CN4

  Turbo LED                  CN2       Speaker                     CN5

  Reset switch               CN3

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 1M x 9     (4) 256K x 9

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

      20MB        (4) 4M x 9      (4) 1M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                          CPU TYPE CONFIGURATION

    Type      JP24   JP25    JP28   JP32   JP33   JP34    JP35     JP36

  80386DX      2 &    1 &    1 &    1 &     1 &    1 &    Closed   Closed
               3      2       2      2      2      2

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

  80486DLC     2 &    1 &    1 &    1 &     1 &    1 &    Closed   Closed
               3      2       2      2      2      2

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

    Type     JP37    JP38   JP39     JP40   JP41    JP42   JP43     JP44

  80386DX    Open    Open   Closed   Open   Open    Open   Open     1 & 2

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

  80486DLC   Open    Open   Closed   Open   Open    Open   Open     1 & 2

  Note:Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

  Speed     JP24    JP25    JP28    JP32    JP33    JP34     JP35    JP36

  25MHz     2 & 3   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3    Open    Open

  33MHz     2 & 3   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3    Open    Open

  50i MHz   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3    Open    Open

  50MHz     1 & 2   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3    Open    Open

  66i MHz   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3    Open    Open

  Note:Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

  Speed   JP37     JP38     JP39   JP40     JP41     JP42     JP43   JP44

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

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

   50I    Open     Open     Open   Closed   Closed   Closed   Open    2 &
  MHz                                                                 3

  50MHz   Closed   Closed   Open   Open     Closed   Closed   Open    2 &
                                                                      3

   66I    Open     Open     Open   Closed   Closed   Closed   Open    2 &
  MHz                                                                 3

  Note:Pins designated should be in the closed position.

     CACHE CONFIGURATION

     Size          Cache

     64KB        (9) 8K x 8

     256KB      (9) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size             JP26               JP27                JP31

      64KB          pins 1 & 2          pins 1 & 2      pins 1 & 2 closed
                      closed             closed

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