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80386SX MOTHERBOARD

UNIDENTIFIED

80386SX MOTHERBOARD

Processor

80386SX

Processor Speed

16MHz

Chip Set

NEAT

Max. Onboard DRAM

8MB

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Reset switch

J4

Speaker

J2

Turbo LED

J5

Turbo switch

J3

External battery

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Turbo enabled

J3

pins 1 & 2 closed

 

Turbo disabled

J3

pins 2 & 3 closed

Battery type select internal

J6

pins 1 & 2 closed

 

Battery type select external

J6

Closed

 

CMOS memory clear

J6

pins 3 & 4 closed

Pipeline enabled

JP3

Closed

 

Pipeline disabled

JP3

Open

NPU asynchronous with CPU

JP4

Closed

 

NPU synchronous with CPU

JP4

Open

 

NPU enabled

JP5

Closed

 

NPU disabled

JP5

Open

Clock select 80386SX clock 2

JP6

pins 2 & 3 closed

 

Clock select 80387SX clock 2

JP6

pins 1 & 2 closed

BIOS type select 27256

JP7

pins 1 & 2 closed

 

BIOS type select 27128

JP7

pins 2 & 3 closed

Monitor type select monochrome

JP8

pins 2 & 3 closed

 

Monitor type select color/EGA/VGA

JP8

pins 1 & 2 closed

BIOS pin select 23 pin

JP9

pins 1 & 2 closed

 

BIOS pin select 30 pin

JP9

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(2) 256K x 9

NONE

NONE

NONE

512KB

NONE

NONE

(18) 41256

NONE

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

1MB

NONE

NONE

(18) 41256

(18) 41256

1.5MB

(2) 256K x 9

(2) 256K x 9

(18) 41256

NONE

1.5MB

(2) 256K x 9

NONE

(18) 41256

(18) 41256

2MB

(2) 256K x 9

(2) 256K x 9

(18) 41256

(18) 41256

2MB

(2) 1M x 9

NONE

NONE

NONE

2MB

NONE

NONE

(18) 411000

(18) 411000

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

4MB

(2) 1M x 9

NONE

(18) 411000

(18) 411000

5MB

(2) 1M x 9

(2) 1M x 9

(18) 41256

(18) 41256

5MB

(2) 1M x 9

(2) 1M x 9

(18) 411000

NONE

5MB

(2) 1M x 9

(2) 1M x 9

(18) 41256

(18) 41256

6MB

(2) 1M x 9

(2) 1M x 9

(18) 411000

(18) 411000

6MB

(2) 1M x 9

(2) 1M x 9

(18) 411000

(18) 411000

8MB

(2) 4M x 9

(2) 4M x 9

NONE

NONE

DRAM JUMPER CONFIGURATION

Size

JP1

JP2

512KB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

512KB

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1MB

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1.5MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1.5MB

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

2MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

2MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

2MB

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

4MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

4MB

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

5MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

5MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

5MB

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

6MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

6MB

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7

8MB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12

Note: Pins designated should be in the closed position.