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12/286MX

LEADING TECHNOLOGY

12/286MX

Processor

80286

Processor Speed

12MHz

Chip Set

Unidentified

Max. Onboard DRAM

2MB

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80287 (exact location unidentified)

CONNECTIONS

Purpose

Location

Purpose

Location

External Battery

J1

Speaker

J8

Turbo LED

J6

Power LED & keylock

J9

Reset switch

J7

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

J3

pins 2 & 3 closed

 

Monitor type select monochrome

J3

pins 1 & 2 closed

Parity check disabled

J4

pins 1 & 2 closed

 

Parity check enabled

J4

pins 2 & 3 closed

Turbo enabled

J5

pins 1 & 2 closed

 

Turbo disabled

J5

pins 2 & 3 closed

Wait state select 0 wait state

J10

pins 1 & 2 closed

 

Wait state select 1 wait state

J10

pins 2 & 3 closed

Factory configured - do not alter

J12

N/A

Reset select power good

J13

pins 1 & 2 closed

 

Reset select RC circuit

J13

pins 2 & 3 closed

BIOS type select 64K

J14

pins 1 & 2 closed

 

BIOS type select 32K

J14

pins 2 & 3 closed

Factory configured - do not alter

J15

Open

Factory configured - do not alter

J16

N/A

NPU speed select 24MHz

J17

pins 2 & 3 closed

 

NPU speed select 12MHz

J17

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

640KB

(4) 44256

(4) 4464

NONE

NONE

1MB

(4) 44256

(4) 44256

NONE

NONE

1152KB

(4) 44256

(4) 4464

(4) 44256

NONE

1536KB

(4) 44256

(4) 44256

(4) 44256

NONE

1664KB

(4) 44256

(4) 4464

(4) 44256

(4) 44256

2MB

(4) 44256

(4) 44256

(4) 44256

(4) 44256

DRAM PARITY CONFIGURATION

Size

P0

P1

P2

P3

640KB

(2) 41256

(2) 4164

NONE

NONE

1MB

(2) 41256

(2) 41256

NONE

NONE

1152KB

(2) 41256

(2) 4164

(2) 41256

NONE

1536KB

(2) 41256

(2) 41256

(2) 41256

NONE

1664KB

(2) 41256

(2) 4164

(2) 41256

(2) 41256

2MB

(2) 41256

(2) 41256

(2) 41256

(2) 41256

DRAM SWITCH CONFIGURATION

Size

SW1/1

SW1/2

SW1/3

640KB

On

On

On

1MB

On

Off

Off

1152KB

On

On

Off

1536KB

Off

On

On

1664KB

On

Off

On

2MB

Off

On

Off