
EVEREX SYSTEMS, INC.

STEP 386/20 REV.E (EV-1816A)

Processor         80386DX
Processor Speed   20MHz
Chip Set          C & T
Max. Onboard DRAM 8MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card
NPU Options       80387DX

[Image]

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Monitor select color                     C/M            Closed

      Monitor select monochrome                C/M             Open

     NPU enabled                               W3            Closed

      NPU disabled                              W3             Open

     External memory card disabled            W14            Closed

      External memory card enabled             W14             Open

     Base memory select 512KB                 W16            Closed

      Base memory select 640KB                 W16             Open

     Bus speed select 6.7MHz                  W17            Closed

      Bus speed select 10MHz                   W17             Open

     External memory card parity              W20            Closed
      checking disabled

      External memory card parity              W20             Open
      checking disabled

                            DRAM CONFIGURATION

    Mainboard        Total      Bank 0     Bank 1     Bank 2     Bank 3
      mem.          memory

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

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

      2MB            4MB        (4) 256K   (4) 256K  (4) 256K    (4) 256K
                                  x 9        x 9       x 9         x 9

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

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

      8MB            16MB       (4) 1M x   (4) 1M x  (4) 1M x    (4) 1M x
                                   9          9         9           9

  Note: Banks 2 & 3 are located on the external memory card.

                         DRAM JUMPER CONFIGURATION

     Size           W1            W15           W21             PAL

     1MB          Closed        Closed        Closed      ICX-1816A-107C

     2MB          Closed        Closed         Open        ICX-1816-107A

  4MB (256K x     Closed        Closed        Closed      ICX-1816A-107C
      9)

   4MB (1M x       Open          Open          Open        ICX-1816-107A
      9)

     8MB           Open          Open          Open        ICX-1816-107A

     16MB          Open          Open          Open        ICX-1816-107A

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2         Bank 3

     64KB       (8) 16K x 4        NONE          NONE           NONE

     128KB      (8) 16K x 4    (8) 16K x 4       NONE           NONE

     256KB      (8) 16K x 4    (8) 16K x 4    (8) 16K x 4    (8) 16K x 4

  Note: Banks 2 & 3 are located on the external memory card.

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