
EVEREX SYSTEMS, INC.

STEP 486 EISA VL (EV-3605)

Processor           80486SX/80487SX/80486DX
Processor Speed     20/25/33MHZ
Chip Set            C & T
Max. Onboard DRAM   64MB
SRAM Cache          256/512/1024KB
BIOS                AMI
Dimensions          330mm x 218mm
I/O Options         32-bit VESA local bus slot, keyboard
                    controller/daughter card
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                       Location     Purpose           Location

  Keyboard                         C1        Turbo LED           JP16
  controller/daughter card

  LED front panel connector        CN1       Turbo switch        JP17

  Speaker                          J19       Reset switch        JP18

  Power LED & keylock              J22       32-bit VESA          S1
                                             Local bus slot

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     Factory configured - do not            J1                Closed
      alter

     Factory configured - do not            JP9             pins 2 & 3
      alter                                                    closed

     Factory configured - do not           JP21             pins 2 & 3
      alter                                                    closed

     Factory configured - do not           JP23               Closed
      alter

     Monitor type select color             JP24                Open

      Monitor type select                   JP24               Closed
      monochrome

     CMOS memory normal operation          JP25                Open

      CMOS memory clear                     JP25               Closed

     Factory configured - do not           JP31               Closed
      alter

     Factory configured - do not           JP32               Closed
      alter

     Factory configured - do not           JP33               Closed
      alter

     Factory configured - do not           JP100            pins 2 & 3
      alter                                                    closed

     Factory configured - do not           JP101              Closed
      alter

     Factory configured - do not           JP102              Closed
      alter

     Factory configured - do not           JP103              Closed
      alter

     Factory configured - do not           JP104              Closed
      alter

                            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

      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

      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

     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

     18MB       (4) 256K x 9   (4) 256K x 9   (4) 4M x 9        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

     64MB       (4) 16M x 9       NONE           NONE           NONE

     128MB      (4) 16M x 9    (4) 16M x 9       NONE           NONE

     192MB      (4) 16M x 9    (4) 16M x 9    (4) 16M x 9       NONE

     256MB      (4) 16M x 9    (4) 16M x 9    (4) 16M x 9    (4) 16M x 9

                        CACHE JUMPER CONFIGURATION

     Size         JP1         JP3         JP4         JP12        JP13

    256KB       pins 1 &    pins 1 &    pins 1 &    pins 1 &     pins 1 &
                   2           2           2           2            2

    512KB       pins 2 &    pins 2 &    pins 1 &    pins 1 &     pins 2 &
                   3           3           2           2            3

    1024KB      pins 2 &    pins 2 &    pins 2 &    pins 2 &     pins 2 &
                   3           3           3           3            3

  Note:pins designated should be in the closed position.

                    CACHE CONFIGURATION

     Size          Cache         Location         TAG

     64KB        (8) 8K x 8    Banks 0 & 1    (2) 16K x 4

     128KB      (4) 32K x 8       Bank 0      (2) 16K x 4

     256KB      (8) 32K x 8    Banks 0 & 1    (2) 16K x 4

                          CPU TYPE CONFIGURATION

       Type              JP15               JP5                JP7

      80486SX            Open              Open             pins 1 & 2
                                                             closed

      80487SX           Closed           pins 1 & 2         pins 2 & 3
                                          closed             closed

      80486DX           Closed           pins 2 & 3         pins 2 & 3
                                          closed             closed

