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80386 MOTHERBOARD (VER. 3.2)

UNIDENTIFIED

80386 MOTHERBOARD (VER. 3.2)

Processor

80386DX

Processor Speed

16/20/25/30MHz

Chip Set

C & T

Video Chip Set

None

Maximum Onboard Memory

16MB (8MB on external memory card)

Maximum Video Memory

None

Cache

Unidentified

BIOS

AMI/Award/Phoenix

Dimensions

327mm x 218mm

I/O Options

External memory card, cache connector

NPU Options

80287/80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP3

Turbo LED

JP7

Turbo switch

JP4

Cache memory connector

JP11

Power LED & keylock

JP5

Reset switch

JP12

Speaker

JP6

External memory card

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

8042 controller uses 23 pin control

JP1

Pins 1 & 2 closed

 

Circuit speed select by pressing CTRL, ALT + or -

JP1

Pins 2 & 3 closed

 

Monitor type select color/EGA/VGA

JP2

Pins 1 & 2 closed

 

Monitor type select monochrome

JP2

Pins 2 & 3 closed

 

Battery type select external

JP3

Closed

 

On board battery enabled

JP3

Pins 1 & 2 closed

 

On board battery disabled

JP3

Open

 

CMOS memory clear

JP3

Pins 3 & 4 closed

Factory configured - do not alter

JP8

Closed

CACHE CONFIGURATION

Note: The size of the cache module is unidentified.

NPU SELECTION

Type

JP9

JP10

None installed

Pins 1 & 2 closed

Open

80287

Pins 1 & 2 closed

Open

80387

Pins 2 & 3 closed

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

1MB

1MB

None

None

2MB

None

None

1MB

1MB

8MB

None

None

4MB

4MB

8MB

4MB

4MB

None

None

16MB

4MB

4MB

4MB

4MB

Note: The location of the banks are unidentified. The size of the chips are unidentified on the main board and memory card. Banks 1 & 2 are located on the main board. Banks 2 & 3 are located on the external memory card.

DRAM JUMPER CONFIGURATION

Setting

J1

J2

No memory installed in main board

Pins 1 & 2, 4 & 5 closed

Pins 1 & 2, 4 & 5 closed

Memory installed on main board

Pins 2 & 3, 5 & 6 closed

Pins 2 & 3, 5 & 6 closed

Note: Either 2MB or 8MB will be installed on the memory card.