EFA CORPORATION

ECA 4M33

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

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J1       Power LED & keylock         J22

  Turbo LED                   J13      Turbo switch                J23

  Speaker                     J21      Reset switch                J24

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color                J5              Open

      Monitor type select monochrome           J5             Closed

                            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

     3MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9      NONE

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

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

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

     6MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9        NONE

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

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

     10MB       (4) 256K x 9   (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

     12MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9        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

     20MB       (4) 1M x 9     (4) 4M x 9        NONE           NONE

     24MB       (4) 1M x 9     (4) 1M x 9     (4) 4M x 9        NONE

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

     36MB       (4) 1M x 9     (4) 4M x 9     (4) 4M x 9        NONE

     40MB       (4) 1M x 9     (4) 1M x 9     (4) 4M x 9     (4) 4M x 9

     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 CONFIGURATION

  Size       Bank 0          Bank 1            TAG

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

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

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

                 CACHE JUMPER CONFIGURATION

   Size      J17        J18       J19       J20      J25

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

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

  256KB     2 & 3      1 & 2     2 & 3     2 & 3    2 & 3

  Note:Pins designated should be in the closed position.

                    CPU TYPE CONFIGURATION

        Type                  J9                  J10

       80486SX              Closed         pins 2 & 3 closed

       80486DX               Open          pins 1 & 2 closed