EVEREX SYSTEMS, INC.

STEP 386 (REV. D)

Processor         80386DX
Processor Speed   16/20MHz
Chip Set          C & T
Max. Onboard DRAM 8MB
Cache             64/128KB
BIOS              AMI
Dimensions        355mm x 304mm
I/O Options       32-bit external memory card
NPU Options       80387DX

[Image]

                CONNECTIONS

  Purpose                        Location

  32-bit external memory card       S1

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   Factory configured - do not            J1               Unknown
      alter

  »   Factory configured - do not            J2               Unknown
      alter

  »   Factory configured - do not            SW1              Unknown
      alter

  »   NPU enabled                            W3                Closed

      NPU disabled                           W3                 Open

  »   32-bit memory card enabled             W14               Closed

      32-bit memory card disabled            W14                Open

  »   Base memory select 640KB               W16               Closed

      Base memory select 512KB               W16                Open

  »   Bus speed select 10MHz                 W17               Closed

      Bus speed select 6.7MHz                W17                Open

                         SYSTEM DRAM CONFIGURATION

  Size     Bank 0     Bank 1    Bank 2     Bank 3       W1         W15

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

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

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

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

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

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

  Note:Banks 2 & 3, and W1 are located on the external memory card.

                            CACHE CONFIGURATION

     Size          Bank 0        Bank 1          TAG          Dirty Bit
                                                               (U38)

     64KB        (8) 16K x 4      NONE       (2) 16K x 4    (1) 16K x 4

     128KB       (8) 16K x 4   (8) 16K x 4   (2) 16K x 4    (1) 16K x 4

  Note:Each Cache bank must be fully populated when its corresponding
  DRAM bank is populated.

                        RESISTOR SIPS CONFIGURATION

               Settings                       Memory Banks enabled

  RP27, RP30, RP58, & RP61 installed                 Bank 0

  RP28, RP31, RP59, & RP62 installed               Bank 0 & 1

  RP29, RP32, RP60, & RP63 installed           Banks 0, 1, 2, & 3

[Image]

                            CACHE CONFIGURATION

          Size                    Bank 2                   Bank 3

          64KB                 (8) 16K x 4                  NONE

          128KB                (8) 16K x 4              (8) 16K x 4

  Note:Each Cache bank must be fully populated when its corresponding
  DRAM bank is populated.