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80386SX-20/25 SC/SI

FIRST INTERNATIONAL COMPUTER, INC.

80386SX-20/25 SC/SI

Processor

80386SX

Processor Speed

20/25MHz

Chip Set

Symphony

Max. Onboard DRAM

32MB

Cache

16/32/64/128KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo switch

JP30

Speaker

JP33

Turbo LED

JP31

Power LED & keylock

JP34

Reset switch

JP32

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

Monitor type select monochrome/EGA

JP2

Open

 

Monitor type select color

JP2

Closed

Note:JP21 is also used to set cache size, therefore its setting will vary when cache is enabled.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(2) 256K x 9

NONE

NONE

NONE

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

1.5MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

NONE

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

NONE

NONE

2.5MB

(2) 256K x 9

(2) 1M x 9

NONE

NONE

3MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

5MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

(2) 1M x 9

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

NONE

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

NONE

NONE

9MB

(2) 256K x 9

(2) 256K x 9

(2) 4M x 9

NONE

10MB

(2) 1M x 9

(2) 4M x 9

NONE

NONE

12MB

(2) 1M x 9

(2) 1M x 9

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9

NONE

NONE

18MB

(2) 1M x 9

(2) 4M x 9

(2) 4M x 9

NONE

20MB

(2) 1M x 9

(2) 1M x 9

(2) 4M x 9

(2) 4M x 9

24MB

(2) 4M x 9

(2) 4M x 9

(2) 4M x 9

NONE

26MB

(2) 1M x 9

(2) 4M x 9

(2) 4M x 9

(2) 4M x 9

32MB

(2) 4M x 9

(2) 4M x 9

(2) 4M x 9

(2) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

16KB

(2) 8K x 8

NONE

(1) 8K x 8

32KB

(2) 8K x 8

(2) 8K x 8

(1) 8K x 8

64KB

(2) 32K x 8

NONE

(1) 32K x 8

128KB

(2) 32K x 8

(2) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP3

JP10

JP16

JP17

JP18

JP19

JP20

JP21

JP27

JP29

16KB

1 & 2

1 & 2

1 & 2

Open

1 & 2

1 & 2

1 & 2

1 & 2

Open

Closed

32KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

Closed

Open

64KB

2 & 3

2 & 3

1 & 2

Open

2 & 3

1 & 2

1 & 2

1 & 2

Open

Closed

128KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Closed

Open

Note:Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION

Setting

JP4

JP5

JP6

JP7

JP8

Enabled

1 & 2

1 & 2

Open

Open

Open

Disabled

2 & 3

2 & 3

Closed

Closed

Closed

Note:Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CONíT)

Setting

JP9

JP11

JP12

JP13

JP14

JP15

Enabled

Open

Open

Open

1 & 2

Open

Open

Disabled

Closed

Closed

Closed

Open

Closed

Closed

Note:Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CONíT)

Setting

JP22

JP23

JP24

JP25

JP26

JP28

Enabled

Open

Open

Closed

Open

Open

Open

Disabled

Closed

Open

Open

Closed

Closed

Closed