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386SX-S NON CACHE MAINBOARD MODEL 2

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