
YOUNG MICRO SYSTEMS, INC.

VEGA 486 GREEN AIO 2VLB

Processor       80486SX/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set        Symphony
Max. Onboard    128MB
DRAM
Cache           64/128/256/512/1024KB
BIOS            AMI
Dimensions      330mm x 218mm
I/O Options     32-bit VESA local bus slots (2), floppy drive interface,
                IDE interface, parallel port, PS/2 mouse connector, serial
                ports (2)
NPU Options     None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Reset switch                J1       Serial port 2              CN2

  Speaker                     J2       IDE interface              CN3

  Turbo LED                   J3       Floppy drive               CN4
                                       interface

  Turbo switch                J4       PS/2 mouse connector       CN5

  Power LED & keylock         J5       Parallel port              CN6

  Resume connector            J6       IDE interface LED          IJ4

  Serial port 1              CN1       32-bit VESA Local bus   SL1 & SL2
                                       slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             IJP1             Open
      alter

     Factory configured - do not             IJP2             Open
      alter

     Factory configured - do not             IJP3             Open
      alter

     Factory configured - do not          IW4/ 1 & 2          Open
      alter

     Factory configured - do not          IW4/ 3 & 4          Open
      alter

     Factory configured - do not          IW4/ 5 & 6          Open
      alter

     Factory configured - do not          IW4/ 7 & 8          Open
      alter

     IDE interface enabled               IW4/ 9 & 10          Open

      IDE interface disabled              IW4/ 9 & 10         Closed

     Factory configured - do not             JP9              Open
      alter

     Factory configured - do not             JP10             Open
      alter

     Cache control select combined           JP16          pins 1 & 2
                                                              closed

      Cache control select separate           JP16          pins 2 & 3
                                                              closed

     Monitor type select color               JP17            Closed

      Monitor type select monochrome          JP17             Open

     BIOS type select regular                JP18          pins 1 & 2
                                                              closed

      BIOS type select flash EPROM            JP18          pins 2 & 3
                                                              closed

     Factory configured - do not             JP22             Open
      alter

     Factory configured - do not             JP23             Open
      alter

     Factory configured - do not             JP24             Open
      alter

     Factory configured - do not             JP28             Open
      alter

     Factory configured - do not             JP29             Open
      alter

     Factory configured - do not             JP30             Open
      alter

     Factory configured - do not             JP31             Open
      alter

     Factory configured - do not              W1              Open
      alter

     Factory configured - do not              W2              Open
      alter

     Factory configured - do not              W3              Open
      alter

     Factory configured - do not              W4              Open
      alter

     Factory configured - do not              W5              Open
      alter

     Factory configured - do not              W6              Open
      alter

     Parallel port IRQ select IRQ7           W11           pins 2 & 3
                                                              closed

      Parallel port IRQ select IRQ5           W11           pins 1 & 2
                                                              closed

     Factory configured - do not             W12              Open
      alter

     Onboard port select enabled             WT1              Open

      Onboard port select disabled            WT1             Closed

                            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

     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 (U1 & U2)

      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     JP11    P1 -    R2-1/4
                                                               P4

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

   486SL      Open    Closed    Open    1 &   Closed   1 &    Closed   Closed
                                         2              2

   486DX      Open     Open     Open    1 &   Closed   1 &    Closed   Open
                                         2              2

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

  Overdrive   Closed  Closed   Closed   1 &    Open    2 &    Open     Closed
                                         2              3

  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

                  VESA WAIT STATE/BUS SPEED CONFIGURATION

    CPU speed        Wait states           JP20               JP21`

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

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

                        PARALLEL PORT CONFIGURATION

           Type                     W14                     W15

   Enhanced parallel port           Open             pins 2 & 3 closed
        (EPP) mode

       Standard mode               Closed            pins 1 & 2 closed

