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80386SX-20 CACHE MAINBOARD

SHUTTLE COMPUTER INTERNATIONAL, INC.

80386SX-20 CACHE MAINBOARD

Processor

80386SX

Processor Speed

20MHz

Chip Set

OPTI

Max. Onboard DRAM

16MB

Cache

64KB

BIOS

AMI

Dimensions

248mm x 330mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

JP8

Reset switch

S2

Power LED & keylock

J22

Turbo switch

S3

Speaker

J21

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP1

pins 2 & 3 closed

 

CMOS memory clear

JP1

pins 1 & 2 closed

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

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

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

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

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

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

16KB

(4) 4K x 8

(4) 4K x 8

(3) 16K x 4

32KB

(4) 8K x 8

NONE

(3) 16K x 4

64KB

(4) 8K x 8

(4) 8K x 8

(3) 16K x 4

Note:The location of the cache is unidentified.

CACHE JUMPER CONFIGURATION

Size

JP3

JP4

JP5

JP6

JP7

16KB

1 & 2

1 & 2

1 & 2

Open

Open

32KB

2 & 3

1 & 2

1 & 2

Closed

Open

64KB

2 & 3

2 & 3

2 & 3

Open

Closed

Note: Pins designated should be in the closed position.