
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.

