UNIDENTIFIED

386SX-S NON CACHE MAINBOARD MODEL 2

Processor

CX486SLC

Processor Speed

25/33/40MHz

Chip Set

Unidentified

Max. Onboard DRAM

16MB

Cache

None

BIOS

Unidentified

Dimensions

220mm x 220mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Turbo LED

JP7

Turbo switch

JP5

Power LED & keylock

JP8

Reset switch

JP6

Speaker

JP9

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

»

NPU synchronous with CPU

JP3

pins 1 & 2 closed

 

NPU asynchronous with CPU

JP3

pins 2 & 3 closed

»

Pipeline mode disabled

JP4

pins 1 & 2 closed

 

Pipeline mode enabled

JP4

pins 2 & 3 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

CPU SPEED CONFIGURATION

Speed

JP10

JP11

25MHz

pins 1 & 2 closed

pins 2 & 3 closed

33MHz

pins 2 & 3 closed

pins 1 & 2 closed

40MHz

pins 2 & 3 closed

pins 2 & 3 closed