UNIDENTIFIED

MICRO 286-12/MICRO 286-16

   

Processor

80286

Processor Speed

12/16MHz

Chip Set

G-2

Max. Onboard DRAM

4MB

Cache

None

BIOS

AMI

Dimensions

330.2mm x 218.4mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

P1

Turbo LED

P4

Speaker

P2

Turbo switch

P5

Reset switch

P3

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

CPU speed at boot select fast

S1/switch 1

open

 

CPU speed at boot select slow

S1/switch 1

closed

»

Bus speed select 6/8MHz

S1/switch 2

open

 

Bus speed select 12/16MHz

S1/switch 2

closed

 

DRAM speed select 0 wait states

W3

closed

 

DRAM speed select 1 wait state

W3

open

»

BIOS type select 27256

W4

pins 2 & 3 closed

 

BIOS type select 27128

W4

pins 1 & 2 closed

»

NPU mode select synchronous with CPU

W5

286CLK

 

NPU mode select synchronous with Oscillator installed at O1

W5

iOSC

»

Monitor type select color

W6

closed

 

Monitor type select monochrome

W6

open

Note:The max. and min. speeds of the bus are equal to the max. and min. speeds of the CPU.

e.g. A 16MHz system would have bus speeds of 8MHz (min.) and 16MHz (max).

DRAM CONFIGURATION

Size

Bank 0

Bank 1

W7

S1/Switch 3

S1/Switch 4

512KB

(18) 41256

NONE

pins 2 & 3 closed

closed

closed

640KB

(18) 41256

(18) 41256

pins 2 & 3 closed

closed

open

1MB

(18) 41256

(18) 41256

pins 2 & 3 closed

open

open

2MB

(18) 411000

NONE

pins 1 & 2 closed

open

closed

4MB

(18) 411000

(18) 411000

pins 1 & 2 closed

open

open