YOUNG MICRO SYSTEMS, INC.

VS486S

Processor        80486SX/80486DX/80486DX2
Processor Speed  25/33/40/50(internal)/66(internal)MHz
Chip Set         Symphony
Max. Onboard DRAM64MB
Cache            64/256KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      None
NPU Options      4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Speaker                     CN1       Turbo LED                  CN4

  Power LED & keylock         CN2       Turbo switch               CN5

  Reset switch                CN3

                            DRAM CONFIGURATION

     Size         Bank 0          Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9       NONE           NONE           NONE

     2MB        (4) 256K x 9   (4) 256K x 9       NONE           NONE

     4MB        (4) 1M x 9         NONE           NONE           NONE

     5MB        (4) 1M x 9     (4) 256K x 9       NONE           NONE

     8MB        (4) 1M x 9      (4) 1M x 9        NONE           NONE

     16MB       (4) 1M x 9      (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     16MB       (4) 4M x 9         NONE           NONE           NONE

     32MB       (4) 4M x 9      (4) 4M x 9        NONE           NONE

     48MB       (4) 4M x 9      (4) 4M x 9     (4) 4M x 9        NONE

     64MB       (4) 4M x 9      (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

      CACHE CONFIGURABLE

     Size          Cache

     64KB        (9) 8K x 8

     256KB      (9) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size               J2                 J5                  J8

      64KB           pins 2 & 3          pins 2 & 3         pins 2 & 3
                       closed             closed              closed

     256KB           pins 1 & 2          pins 1 & 2         pins 1 & 2
                       closed             closed              closed

  Note:This board is direct but not user upgradable and has two factory
  defauts to incorporate the 486DX/33MHz or 486DX/50MHz.