...because we can't all be on the bleeding edge...





STEP 286

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

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 closed

pins 2 & 3, 5 & 6 closed

8 or 10MHz

pins 1 & 2, 4 & 5 closed

pins 1 & 2, 4 & 5 closed