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80386B

AMERICAN MEGATRENDS, INC.

80386B

Processor

80386SX

Processor Speed

16/20/25MHz

Chip Set

C & T

Video Chip Set

None

Maximum Onboard Memory

16MB (8MB on external memory card)

Maximum Video Memory

None

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

External memory cards (2)

NPU Options

80287 (exact location unidentified)/80387SX/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J17

Turbo LED

J22

Speaker

J18

External memory cards

SL1 & SL2

External battery

J20

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Jumper information unavailable

J19

Unidentified

 

80287 installed

JP1

Closed

 

80287 not installed

JP1

Open

 

Monitor type select color

JP3

Pins 1 & 2 closed

 

Monitor type select monochrome

JP3

Pins 2 & 3 closed

 

Jumper information unavailable

JP5

Unidentified

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

None

None

None

2MB

(4) 256K x 9

(4) 256K x 9

None

None

4MB

(4) 256K x 9

(4) 256K x 9

(36) 41256

(36) 41256

4MB

(4) 1M x 9

None

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 located on the external memory card.

CPU SPEED SELECTION

Speed

J21

16MHz

Pins 1 & 2 closed

20MHz

Pins 2 & 3 closed

25MHz

Pins 2 & 3 closed

NPU TYPE SELECTION

Type

JP11

JP12

80387 installed

Closed

Closed

80387 not installed

Open

Open

DRAM JUMPER CONFIGURATION

Setting

JP1

JP2

Card configured as Bank 0 & 1

Pins 1 & 2, 4 & 5 closed

Pins 1 & 2, 4 & 5 closed

Card configured as Bank 2 & 3

Pins 2 & 3, 5 & 6 closed

Pins 2 & 3, 5 & 6 closed

Note: If all 4 banks are populated, memory card must be set as banks 2 & 3. Jumpers JP1 & JP2 are incorrectly labeled in the card. The correct label should read banks selection.