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80386 MOTHERBOARD

UNIDENTIFIED

80386 MOTHERBOARD

Processor

80386DX

Processor Speed

25MHz

Chip Set

C & T

Max. Onboard DRAM

8MB

Cache

None

BIOS

AMI/Award/Phoenix

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slots (2)

NPU Options

80287/80387

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J11

32-bit external memory card

S1

Turbo switch

J12

32-bit external memory card

S2

Power LED & keylock

J13

Reset switch

SW1

External battery

JP10

Turbo LED

SW2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP8

pins 1 & 2 closed

 

Monitor type select monochrome

JP8

pins 2 & 3 closed

CMOS memory normal operation

JP9

Open

 

CMOS memory clear

JP9

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

10MB

(4) 1M x 9

(4) 1M x 9

(36) 41256

(36) 41256

16MB

(4) 1M x 9

(4) 1M x 9

(36) 411000

(36) 411000

Note:Banks 2 & 3 are used when a 32-bit external memory card is installed.

NPU TYPE CONFIGURATION

Type

JP3

JP6

JP7

80287

Open

Closed

Open

80387

Closed

Closed

Closed

Disabled

Open

Open

Open

NPU MODE CONFIGURATION

Setting

JP2

JP4

Synchronous with cpu

pins 1 & 2 closed

pins 2 & 3 closed

Synchronous with oscillator osc1

pins 2 & 3 closed

pins 1 & 2 closed

BIOS CONFIGURATION

Setting

JP1

JP20

AMI/Award

pins 1 & 2 closed

pins 1 & 2 closed

Phoenix

pins 2 & 3 closed

pins 2 & 3 closed