AMERICAN DIGITAL DATA ASSOCIATES

EA-6580

Processor            80486SX/80487SX/80486DX/80486DX2
Processor Speed      20/25/33/50(internal)/50/66(internal)MHz
Chip Set             SIS
Max. Onboard DRAM    128MB
Cache                64/128/256/512KB
BIOS                 AMI
Dimensions           330mm x 218mm
I/O Options          None
NPU Options          4167

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Reset switch               CN1       Speaker                     CN4

  Turbo LED                  CN2       Power LED & keylock         CN5

  Turbo switch               CN3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CPU speed select 33MHz                  JP11           pins 2 & 3
                                                              closed

      CPU speed select 50MHz                  JP11           pins 1 & 2
                                                              closed

  »   Monitor type select monochrome          JP12             Open

      Monitor type select color               JP12            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

      64MB        (4) 16M x 9        NONE

     128MB        (4) 16M x 9    (4) 16M x 9

                            CACHE CONFIGURATION

     Size          Bank 0        Bank 1       TAG (U47)       Dirty Bit
                                                                (U32)

     64KB        (4) 8K x 8    (4) 8K x 8    (1) 8K x 8      (1) 8K x 8

     128KB       (4) 32K x 8      NONE       (1) 8K x 8      (1) 8K x 8

     256KB       (4) 32K x 8    (4) 32K x    (1) 32K x 8     (1) 32K x 8
                                   8

     512KB       (4) 128K x       NONE       (1) 32K x 8     (1) 32K x 8
                     8

                        CACHE JUMPER CONFIGURATION

   Size     JP1     JP2     JP3     JP4    JP5     JP6     JP7      JP8

   64KB    1 & 2   1 & 2   1 & 2   1 & 2   1 & 2   1 & 2   2 & 3   Open

  128KB    2 & 3   1 & 2   1 & 2   2 & 3   1 & 2   1 & 2   1 & 2   Closed

  256KB    2 & 3   2 & 3   1 & 2   2 & 3   2 & 3   1 & 2   4 & 5   Closed

  512KB    2 & 3   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3   1 & 2   Closed

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

          Type                     JP9                      JP10

         80486SX            pins 2 & 4 closed               Open

         80487SX             pins 1 & 2, 3 & 4       pins 2 & 3 closed
                                  closed

         80486DX             pins 1 & 2, 3 & 4       pins 1 & 2 closed
                                  closed

        80486DX2             pins 1 & 2, 3 & 4       pins 1 & 2 closed
                                  closed