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





286 MAINBOARD

MANDAX COMPUTER, INC.

286 MAINBOARD

Processor

80286

Processor Speed

6/12MHz

Chip Set

Unknown

Max. Onboard DRAM

4MB

SRAM Cache

None

BIOS

AMI

Dimensions

330.2mm x 218.4mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Digital CPU speed display

J1

Speaker

JP7

External battery

J15

Turbo LED

JP10

Power LED & keylock

JP4

Reset switch

JP11

Turbo switch

JP5

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Monitor type select monochrome

JP1

pins 1 & 2 closed

 

Monitor type select color

JP1

pins 2 & 3 closed

NPU disabled

JP2

pins 2 & 3 closed

 

NPU enabled

JP2

pins 1 & 2 closed

Factory configured - do not alter

JP3

closed

RTC type select alkaline

JP6

pins 2 & 3 closed

 

RTC type select lithium

JP6

pins 1 & 2 closed

I/O speed select 6MHz

JP8

open

 

I/O speed select synchronous with CPU clock

JP8

closed

Wait states select switchable at keyboard

JP9

pins 1 & 2 closed

 

Wait state select one

JP9

open

 

Wait states select zero

JP9

pins 2 & 3 closed

BIOS type select 27256

JP12

pins 2 & 3 closed

 

BIOS type select 27512

JP12

pins 1 & 2 closed

Monitor type select monochrome

SW1/switch 1

open

 

Monitor type select color

SW1/switch 1

closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

SW1/switch 2

SW1/switch 3

SW1/switch 4

512KB

(18) 41256

NONE

closed

closed

open

640KB

(18) 41256

(18) 4164

closed

open

closed

1MB

(18) 41256

(18) 41256

closed

open

open

2MB

(18) 411000

NONE

open

open

closed

4MB

(18) 411000

(18) 411000

open

open

open