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386SX-25

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