UNIDENTIFIED

386SX-25

Processor

80386SX

Processor Speed

25MHz

Chip Set

Unidentified

Max. Onboard DRAM

16MB

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP17

Turbo switch

JP24

Speaker

JP21

Turbo LED

JP25

Power LED & keylock

JP22

Reset switch

JP26

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation

JP16

Open

 

CMOS memory clear

JP16

Closed

»

Monitor type select color

JP18

Closed

 

Monitor type select monochrome

JP18

Open

»

Floppy drive current select (24mA)

JP19

Closed

 

Floppy drive current select (12mA)

JP19

Open

»

Pipeline mode enabled

JP20

Closed

 

Pipeline mode disabled

JP20

Open

»

NPU disabled

JP23

pins 2 & 3 closed

 

NPU enabled

JP23

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

P-0

Bank 1

P-1

Bank 2

Bank 3

512KB

(4) 44256

(2) 41256

NONE

NONE

NONE

NONE

512KB

NONE

NONE

NONE

NONE

(2) 256K x 9

NONE

1MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

NONE

NONE

1MB

NONE

NONE

NONE

NONE

(2) 256K x 9

(2) 256K x 9

2MB

(4) 441000

(2) 411000

NONE

NONE

NONE

NONE

2MB

NONE

NONE

NONE

NONE

(2) 1M x 9

NONE

4MB

(4) 441000

(2) 411000

(4) 441000

(2) 411000

NONE

NONE

4MB

NONE

NONE

NONE

NONE

(2) 1M x 9

(2) 1M x 9

8MB

NONE

NONE

NONE

NONE

(2) 4M x 9

NONE

16MB

NONE

NONE

NONE

NONE

(2) 4M x 9

(2) 4M x 9