
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

