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80386SX-20/25

UNIDENTIFIED

80386SX-20/25

Processor

80386SX

Processor Speed

16/20/25MHz

Chip Set

C & T

Max. Onboard DRAM

16MB (8MB on external memory card)

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card

NPU Options

80287/80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J17

Turbo LED

J22

Speaker

J18

External battery

JP30

Reset switch

J19

32-bit external memory card

SL1

Turbo switch

J21

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

NPU disabled (80287)

JP1

Open

 

NPU enabled (80287)

JP1

Closed

Monitor type select color

JP3

pins 1 & 2 closed

 

Monitor type select monochrome

JP3

pins 2 & 3 closed

CMOS memory normal operation

JP31

Open

 

CMOS memory clear

JP31

Closed

DRAM CONFIGURATION

Size

Bank 0

Parity 0

Bank 1

Parity 1

1MB

(36) 41256

(3) 41256

NONE

(3) 41256

2MB

(36) 41256

(3) 41256

(36) 41256

(3) 41256

4MB

(36) 44256

(3) 41256

NONE

(3) 41256

8MB

(36) 44256

(3) 41256

(36) 44256

(3) 41256

NUMERIC COPROCESSOR CONFIGURATION (80387)

Setting

JP11

JP12

Not installed

Open

Open

Installed

Closed

Closed