UNIDENTIFIED

ALI 386SX MAINBOARD

Processor

80386SX/CX486SLC

Processor Speed

16/20/25/33MHz

Chip Set

None

Max. Onboard DRAM

16MB

SRAM Cache

None

BIOS

AMI

Dimensions

216mm x 170mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J4

Turbo switch & LED

J8

Reset switch

J6

Power LED & keylock

J9

Speaker

J7

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

ADS signal delay disabled

J5

pins 2 & 3 closed

 

ADS signal delay enabled

J5

pins 1 & 2 closed

»

NPU mode select synchronous with CPU

JP2

pins 1 & 2 closed

 

NPU mode select asynchronous

JP2

pins 2 & 3 closed

»

RTC type select 146816

JP3

open

 

RTC type select DS1287

JP3

closed

»

Monitor type select monochrome

JP4

open

 

Monitor type select color

JP4

closed

»

Parity check enabled

JP6

open

 

Parity check disabled

JP6

closed

BUS CLOCK CONFIGURATION

CPU Speed

JP1

JP5

33MHz

pins 2 & 3 closed

pins 2 & 3 closed

25MHz

pins 1 & 2 closed

pins 1 & 2 closed

20MHz

pins 2 & 3 closed

pins 1 & 2 closed

16MHz

pins 1 & 2 closed

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

(2) 256K x 9

NONE

1MB

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9