
EVEREX SYSTEMS, INC.

STEP 286

Processor         80286
Processor Speed   12/16MHz
Chip Set          C & T
Max. Onboard DRAM 4MB
Cache             None
BIOS              AMI
Dimensions        246mm x 216mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Turbo LED                   P1       Speaker                     P4

  Turbo Switch                P2       Power LED & Keylock         P5

  Reset switch                P3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome           SW3            Closed

      Monitor type select color                SW3             Open

     DRAM access time 100ns                   W2             Closed

      DRAM access time 70ns                    W2              Open

     CPU select 0 wait states                 W3             Closed

      CPU select 1 wait state                  W3              Open

     Factory configured - do not alter     W4 - W11            N/A

     DRAM access time 80ns                    W15            closed

      DRAM access time 60ns to 70ns            W15             open

  Note:On 12MHz board W2 controls DRAM access time and W15 must remain
  closed.

  On 16MHz board W15 controls DRAM access time and W2 must remain open.

             DRAM CONFIGURATION

     Size          Bank 0        Bank 1

     512KB       (18) 41256       NONE

      1MB        (18) 41256    (18) 41256

      2MB        (18) 411000      NONE

     2.5MB       (18) 411000   (18) 41256

      4MB        (18) 411000   (18) 411000

      DRAM SWITCH CONFIGURATION

  Size     SW2/2    SW2/3    SW2/4

  512KB     On        On       On

   1MB      On        On      Off

   2MB      Off       On       On

  2.5MB     On       Off       On

   4MB      On        On       On

                          NPU SPEED CONFIGURATION

          Speed                     W12                     W13

     5MHz or disabled         pins 2 & 3, 5 & 6       pins 2 & 3, 5 & 6
                                   closed                  closed

        8 or 10MHz            pins 1 & 2, 4 & 5       pins 1 & 2, 4 & 5
                                   closed                  closed

