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386SX MAINBOARD

UNIDENTIFIED

386SX MAINBOARD

Processor

80386SX

Processor Speed

16/20/25/33MHz

Chip Set

Unidentified

Max. Onboard DRAM

16MB

Cache

None

BIOS

Award

Dimensions

254mm x 220mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

CN1

Speaker

J2

Parallel port

CN2

IDE interface LED

J3

Serial port 1

CN3

Reset switch

J4

Serial port 2

CN4

Turbo switch

J5

PS/2 mouse port

CN5

Turbo LED

J6

IDE interface

CN6

External battery

J8

Floppy drive interface

CN7

Riser Card

SL1

Power LED & keylock

J1

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Battery type select internal

J7

pins 1 & 2 closed

 

Battery type select external

J7

pins 2 & 3 closed

Monitor type select monochrome

JP2

Closed

 

Monitor type select color

JP2

Open

CMOS memory normal operation

JP6

pins 1 & 3 closed

 

CMOS memory clear

JP6

pins 2 & 4 closed

Video mode select interlaced

JP7

Closed

 

Video mode select non-interlaced

JP7

Open

On board VGA enabled

JP12

pins 2 & 3 closed

 

On board VGA disabled

JP12

pins 1 & 2 closed

Monitor type select VESA

JP14

pins 1 & 2 closed

 

Monitor type select VGA

JP14

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