YOUNG MICRO SYTEMS, INC.

VEGA 486F-2VL

Processor              80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed        16/20/25/33/50(internal)/50/66(internal)MHz
Chip Set               Symphony
Max. Onboard DRAM      64MB
Cache                  64/256/1024KB
BIOS                   AMI
Dimensions             330mm x 218mm
I/O Options            32-bit VESA local bus slots (2)
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  Speaker                     J1        Turbo LED                  J4

  Power LED & keylock         J2        Turbo switch               J5

  Reset                       J3        32-bit VESA local       S1 & S2
                                        bus slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   VESA I/O wait states select zero         JP5             Open

      VESA I/O wait states select one          JP5             Open

  »   Factory configured - do not alter        JP6            Closed

  »   VESA timing select T3 speed 16 -         JP7            Closed
      33MHz)

      VESA timing select T3 (speed             JP7             Open
      50MHz)

  »   I/O wait states select zero             JP10            Closed

      I/O wait states select one              JP10             Open

  »   Phase select X2 1                       JP11           pins 2 & 3
                                                              closed

      Phase select X1 1                       JP11           pins 1 & 2
                                                              closed

  »   Phase select X2 1                       JP12           pins 2 & 3
                                                              closed

      Phase select X1 1                       JP12           pins 1 & 2
                                                              closed

  »   Phase select X2 1                       JP18           pins 2 & 3
                                                              closed

      Phase select X1 1                       JP18           pins 1 & 2
                                                              closed

  »   Phase select X2 1                       JP19           pins 2 & 3
                                                              closed

      Phase select X1 1                       JP19           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       JP13            Closed

  »   Factory configured - do not alter       JP14            Closed

  Note: 1 Phase X1 is only used when an 80486DX2-50 CPU is installed.

              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         NONE

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

      16MB        (4) 4M x 9         NONE

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

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

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

      64MB        (4) 16M x 9        NONE

      CACHE CONFIGURATION

      Size          Bank 0

      64KB        (8) 8K x 8

     256KB        (8) 32K x 8

      1MB        (8) 128K x 8

                 CACHE JUMPER CONFIGURATION

   Size      JP20      JP21      JP27      JP28      JP29

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

  256KB     1 & 2      2 & 3     2 & 3     1 & 2    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               JP15              JP16               JP17

      80486SX            Closed          pins 1 & 2         pins 2 & 3
                                           closed             closed

     ODP486SX            Closed          pins 1 & 2         pins 2 & 3
                                           closed             closed

      80487SX             Open             Closed              Open

      80486DX            Closed          pins 1 & 2         pins 1 & 2
                                           closed             closed

     80486DX2            Closed          pins 1 & 2         pins 1 & 2
                                           closed             closed

                          CPU SPEED CONFIGURATION

       Speed            JP3           JP4           JP8           JP9

    16/20/25MHz         Open          Open         Open          Open

       33MHz         pins 1 & 2       Open         Open          Open
                       closed

       50MHz         pins 2 & 3      Closed       Closed        Closed
                       closed