
MICROMEDIA TECHNOLOGIES, INC.

486-VLS

Processor        80486SX/80486DX/80486DX2
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         SIS
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       230mm x 218mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Power LED & keylock        CN1       Turbo switch               CN5

  Reset switch               CN2       External battery           CN6

  Speaker                    CN3       32-bit VESA Local bus       S1
                                       slot

  Turbo LED                  CN4       32-bit VESA Local bus       S2
                                       slot

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     80486 (PQFP)                           JP16              Open

      80486(PGA)                             JP16             Closed

              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

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

      16MB        (4) 4M x 9         NONE

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

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

                          CPU TYPE CONFIGURATION

       Type               JP13               JP14              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

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

        CPU SPEED CONFIGURATION

  Type      JP20      JP21      JP22

  25MHz    Closed     Open      Open

  33MHz    Closed    Closed    Closed

  40MHz    Closed    Closed     Open

  50MHz     Open      Open     Closed

                        CACHE JUMPER CONFIGURATION

   Size      JP1      JP2      JP3      JP4      JP5      JP6       JP7

   64KB     pins 1   pins 1   pins 1   pins 1   pins 2    N/A      pins 1
             & 2      & 2      & 2      & 2      & 3                & 2

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

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

  Note: Pins designated should be in the closed position.

           VESA WAIT STATE/BUS SPEED (S1 &AMP; S2) CONFIGURATION

   CPU speed       S1/JP8         S1/JP9        S2/JP10        S2/JP11

     33MHz      pins 1 & 2        N/A         pins 1 & 2        N/A
                   closed                       closed

    > 33MHz      pins 2 & 3        N/A         pins 2 & 3        N/A
                   closed                       closed

     0 wait         N/A         pins 1 & 2        N/A         pins 1 & 2
    states                        closed                        closed

     1 wait         N/A         pins 2 & 3        N/A         pins 2 & 3
     state                        closed                        closed

