EVEREX SYSTEMS, INC.

STEP MP EV-2607

Processor             80386DX/80486DX (Depending on which CPU card is
                      used)
Processor Speed       25/33MHz
Chip Set              C & T
Max. Onboard DRAM     64MB
SRAM Cache            64/256KB
BIOS                  Quadtel
Dimensions            330mm x 220mm
I/O Options           Base card slots (3), CPU Card slot, external memory
                      card, SCSI card slots (2)
NPU Options           80387DX (Depending on which CPU card is used)

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                                CONNECTIONS

  Purpose                 Location     Purpose                Location

  LED display               CN1        Speaker                   J22

  Chassis fan power         J15        Power good LEDs          LEDs

  SCSI B connector          J16        16-bit external           S1
                                       memory card

  SCSI A connector          J17        SCSI board slots        S2 & S3

  Chassis fan power         J21        Base card slots       S4, S5, & S6

                        USER CONFIGURABLE SETTINGS

               Function                     Jumper           Position

  »   I/O bus select ISA card set             J1              closed

      I/O bus select EISA card set            J1               open

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                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Memory activity            CN1       ECC fault indicator        LED1
  indicator                            LED

                         DRAM CONFIGURATION

    Size         Bank 0       Bank 1        Bank 2        Bank 3

    16MB       (4) 4M x 9      NONE          NONE          NONE

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

    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

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                                   NOTE

  Note:This card must be place in either slot 5 or 6 on the system board
  only.

  If installing the card in slot 5 then resistors RP4, RP8, & RP12 must
  be removed.

  If installing the card in slot 6 then

                                CONNECTIONS

  Purpose                Location      Purpose                 Location

  CPU activity              CN1        CPU activity              LED1
  indicator connector                  indicator LED

  SCSI connector            CN2

    CACHE CONFIGURATION

     Size         Cache

     64KB      (8) 8K x 8

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                 Location

  CPU activity              CN1        RS422 Serial I/O           J3
  indicator connector                  connector

  RS422 Serial I/O          J1         RS422 Serial I/O           J4
  connector                            connector

  RS422 Serial I/O          J2         CPU activity              LED1
  connector                            indicator LED

      CACHE CONFIGURATION

      Size           Cache

     256KB       (8) 256K x 1

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                 Location

  CPU activity              CN1        CPU activity              LED1
  indicator connector                  indicator LED

      CACHE CONFIGURATION

      Size           Cache

     256KB       (8) 256K x 1

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                       MEMORY ADDRESS CONFIGURATION

  Function    SW1/1    SW1/2    SW1/3    SW1/4    SW1/5   SW1/6    SW1/7

   Disable      On      Off      Off      Off      Off     Off      Off
   8th MB

   Disable     Off      On       Off      Off      Off     Off      Off
   9th MB

   Disable     Off      Off      On       Off      Off     Off      Off
  10th MB

   Disable     Off      Off      Off      On       Off     Off      Off
  11th MB

   Disable     Off      Off      Off      Off      On      Off      Off
  12th MB

   Disable     Off      Off      Off      Off      Off      On      Off
  13th MB

   Disable     Off      Off      Off      Off      Off     Off       On
  14th MB

  Note:Turning on one or more of the above switches will open a window of
  addressed space for configuration of memory mappd devices like network
  controllers and multiport cards.

                                CONNECTIONS

  Purpose                Location      Purpose                 Location

  CPU activity              CN1        CPU activity              LED1
  indicator connector                  indicator LED

  Base CPU Ribbon           CN2
  connector

      CACHE CONFIGURATION

      Size           Cache

     256KB       (8) 256K x 1

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  Parallel port             CN1        SCSI connector            CN4

  Serial port               CN2        Reset button              CN5

  Paddle port               CN3        Floppy drive              CN6
  connector (optional)                 interface

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Serial port                CN1       Floppy drive interface      CN3

  Base CPU ribbon            CN2       Reset switch                CN4
  connector

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Montior type select color                J1              Open

      Monitor type select monochrome           J1             Closed

  »   Floppy drive interface enabled           J2              Open

      Floppy drive interface disabled          J2             Closed

  »   Serial port select COM1                  J3              Open

      Serial port select COM2                  J3             Closed

  »   Factory configured - do not alter        J4              Open