
YOUNG MICRO SYSTEMS, INC.

VS48664-3VL

Processor   CXM6/AM486SX/SL80486/80486SX/CXM7/AM486DX/80486DX/80486DX2/
            P24C/P24D/Pentium Overdrive
Processor   25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set    Symphony
Max.        128MB
Onboard
DRAM
Cache       64/128/256/512/1024KB
BIOS        AMI/Phoenix
Dimensions  330mm x 218mm
I/O Options 32-bit VESA local bus slots (3), green PC connector
NPU Options None

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  Power LED & keylock       CN1       Turbo LED                   CN5

  Speaker                   CN2       Green PC connector          JP15

  Turbo switch              CN3       32-bit VESA local bus    SL1 - SL3
                                      slots

  Reset switch              CN4

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             J27              N/A
      alter

     Factory configured - do not             J28              N/A
      alter

     Factory configured - do not             J29              N/A
      alter

     Factory configured - do not             J30              N/A
      alter

     Factory configured - do not             J31              N/A
      alter

     Factory configured - do not             J32              N/A
      alter

     Factory configured - do not             J33              N/A
      alter

     Factory configured - do not             J34              N/A
      alter

     Factory configured - do not             JP3              N/A
      alter

     Factory configured - do not             JP9              N/A
      alter

     Parity check enabled                    JP16          pins 1 & 2
                                                              closed

      Parity check disabled                   JP16          pins 2 & 3
                                                              closed

     Monitor type select color               JP17            Closed

      Monitor type select monochrome          JP17             Open

     BIOS type select normal                 JP18          pins 1 & 2
                                                              closed

      BIOS type select flash                  JP18          pins 2 & 3
                                                              closed

     Factory configured - do not             JP19             N/A
      alter

     Factory configured - do not             JP22             N/A
      alter

     Factory configured - do not             JP28             N/A
      alter

     Factory configured - do not             JP29             N/A
      alter

     Factory configured - do not             JP30             N/A
      alter

     Factory configured - do not             JP31             N/A
      alter

  Note: The location of jumpers JP9, JP28, JP29, JP30 & JP31 are
  unidentified.

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

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

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

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

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

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

     32MB        (1) 2M x 36    (1) 2M x 36    (1) 2M x 36   (1) 2M x 36

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

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

     96MB        (1) 8M x 36    (1) 8M x 36    (1) 4M x 36   (1) 4M x 36

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

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

      64KB        (4) 8K x 8      (4) 8K x 8      (2) 8K x 8

     128KB        (4) 32K x 8        NONE         (2) 8K x 8

     256KB        (4) 32K x 8     (4) 32K x 8    (2) 32K x 8

     512KB       (4) 128K x 8        NONE        (2) 32K x 8

      1MB        (4) 128K x 8    (4) 128K x 8    (2) 128K x 8

                 CACHE JUMPER CONFIGURATION

   Size       JD1       JD2       JT1       JT2       JT3

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

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

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

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

   1MB       2 & 3     2 & 3     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     Type          JP1          JP2         JP4        JP5        JP6

    CXM6 1x        Open        Open         Open      2 & 3      Closed

    CXM6 2x        Open        Open         Open      2 & 3      Closed

    AM486SX        Open       Closed        Open      2 & 3      Closed
     (WT)

    AM486SX       Closed      Closed        Open      2 & 3      Closed
     (WB)

    SL80486        Open       Closed        Open      1 & 2      Closed

    80486SX        Open        Open         Open      2 & 3      Closed

    AM486DX        Open       Closed        Open      2 & 3      Closed
     (WT)

    AM486DX       Closed      Closed       Closed     2 & 3      Closed
     (WB)

    CXM7 1x        Open        Open         Open      1 & 2      Closed

    CXM7 2x        Open        Open         Open      1 & 2      Closed

    80486DX        Open        Open         Open      1 & 2      Closed

   80486DX2        Open        Open         Open      1 & 2      Closed

    P24C 2x        Open       Closed        Open      1 & 2      Closed

    P24C 3x        Open       Closed        Open      1 & 2      Closed

   P24D (WT)       Open       Closed        Open      1 & 2      Closed

   P24D (WB)      Closed      Closed       Closed     1 & 2      Closed

    P24T 2x        Open       Closed        Open      1 & 2       Open
     (WT)

    P24T 2x       Closed      Closed       Closed     1 & 2       Open
     (WB)

    P24T 3x        Open       Closed        Open      1 & 2       Open
     (WT)

    P24T 3x       Closed      Closed       Closed     1 & 2       Open
     (WB)

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

     Type          JP7         JP8        JP10       JP11         JP12

    CXM6 1x       1 & 2      Closed       Open       Open         Open

    CXM6 2x       1 & 2      Closed       Open       Open        Closed

  AM486SX (WT)    Open        Open        Open       Open         Open

  AM486SX (WB)    Open        Open        Open       Open         Open

    SL80486       Open        Open        Open       1 & 2        Open

    80486SX       Open        Open        Open       Open         Open

  AM486DX (WT)    Open        Open        Open       1 & 2        Open

  AM486DX (WB)    Open        Open        Open       1 & 2        Open

    CXM7 1x       1 & 2      Closed       Open       1 & 2        Open

    CXM7 2x       1 & 2      Closed       Open       1 & 2       Closed

    80486DX       Open        Open        Open       1 & 2        Open

   80486DX2       Open        Open        Open       1 & 2        Open

    P24C 2x       Open        Open        1 & 2      2 & 3        Open

    P24C 3x       Open        Open        Open       2 & 3        Open

   P24D (WT)      2 & 3       Open        Open       1 & 2        Open

   P24D (WB)      2 & 3       Open        Open       1 & 2        Open

  P24T 2x (WT)    Open        Open        1 & 2      2 & 3        Open

  P24T 2x (WB)    Open        Open        1 & 2      2 & 3        Open

  P24T 3x (WT)    Open        Open        Open       2 & 3        Open

  P24T 3x (WB)    Open        Open        Open       2 & 3        Open

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

     Type          JP13        JP23         JP24        JP41       JP42

    CXM6 1x       Closed      Closed       Closed       Open       Open

    CXM6 2x       Closed      Closed       Closed       Open       Open

    AM486SX        Open        Open         Open       2 & 3      2 & 3
     (WT)

    AM486SX        Open        Open         Open       2 & 3      2 & 3
     (WB)

    SL80486        Open        Open         Open        Open       Open

    80486SX        Open       Closed       Closed       Open       Open

    AM486DX        Open        Open         Open       2 & 3      2 & 3
     (WT)

    AM486DX        Open        Open         Open       2 & 3      2 & 3
     (WB)

    CXM7 1x       Closed      Closed       Closed       Open       Open

    CXM7 2x       Closed      Closed       Closed       Open       Open

    80486DX        Open       Closed       Closed       Open       Open

   80486DX2        Open       Closed       Closed       Open       Open

    P24C 2x        Open        Open         Open        Open       Open

    P24C 3x        Open        Open         Open        Open       Open

   P24D (WT)       Open        Open         Open       1 & 2      1 & 2

   P24D (WB)       Open        Open         Open       1 & 2      1 & 2

    P24T 2x        Open        Open         Open        Open       Open
     (WT)

    P24T 2x        Open        Open         Open        Open       Open
     (WB)

    P24T 3x        Open        Open         Open        Open       Open
     (WT)

    P24T 3x        Open        Open         Open        Open       Open
     (WB)

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

           Type                      RN1                     RN2

          CXM6 1x                   Open                    Open

          CXM6 2x                   Open                    Open

       AM486SX (WT)                 Open             1 & 2, 3 & 4, 5 & 6,
                                                            7 & 8

       AM486SX (WB)                 Open             1 & 2, 3 & 4, 5 & 6,
                                                            7 & 8

          SL80486            1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

          80486SX                   Open                    Open

       AM486DX (WT)          1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

       AM486DX (WB)          1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

          CXM7 1x            1 & 2, 3 & 4, 5 & 6,           Open
                                    7 & 8

          CXM7 2x            1 & 2, 3 & 4, 5 & 6,           Open
                                    7 & 8

          80486DX            1 & 2, 3 & 4, 5 & 6,           Open
                                    7 & 8

         80486DX2            1 & 2, 3 & 4, 5 & 6,           Open
                                    7 & 8

          P24C 2x            1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

          P24C 3x            1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

         P24D (WT)           1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

         P24D (WB)           1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

       P24T 2x (WT)          1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

       P24T 2x (WB)          1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

       P24T 3x (WT)          1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

       P24T 3x (WB)          1 & 2, 3 & 4, 5 & 6,    1 & 2, 3 & 4, 5 & 6,
                                    7 & 8                   7 & 8

  Note: Pins designated should be in the closed position.

         CPU SPEED CONFIGURATION

  Speed      JP25      JP26      JP27

  25MHz     Closed     Open     Closed

  33MHZ      Open      Open     Closed

  40MHz     Closed    Closed     Open

  50iMHz    Closed     Open     Closed

  50MHz      Open     Closed     Open

  66iMHz     Open      Open     Closed

                      CPU VOLTAGE CONFIGURATION

              Voltage                             CN6

               3.3v                               Open

                5v                  pins 1 & 2, 3 & 4, 5 & 6 closed

      VESA WAIT STATE CONFIGURATION

     Wait states             JP20

    0 wait states     pins 1 & 2 closed

    1 wait state      pins 2 & 3 closed

         BUS SPEED CONFIGURATION

      CPU speed              JP21

      <= 33MHz        pins 1 & 2 closed

       > 33MHz        pins 2 & 3 closed

