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

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                        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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