YOUNG MICRO SYTEMS, INC.

VEGA 486 EISA CACHE SERIES

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33/50MHz
Chip Set          SIS
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Speaker                      J1       Turbo LED                  J4

  Power LED & keylock          J2       Turbo switch               J5

  Reset                        J3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not alter        JP9           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       JP21           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       JP23            Closed

  »   Monitor type select color               JP24            Closed

      Monitor type select monochrome          JP24             Open

              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

     CACHE CONFIGURATION

     Size          Bank 0

     64KB        (8) 8K x 8

     128KB      (8) 32K x 8

     256KB      (8) 32K x 8

                        CACHE JUMPER CONFIGURATION

    Size           JP3            JP12           JP13           JP14

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

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

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

                          CPU TYPE CONFIGURATION

       Type               JP5                JP7               JP15

      80486SX             Open            pins 2 & 3           Open
                                           closed

      80487SX          pins 2 & 3         pins 1 & 2          Closed
                         closed            closed

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