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