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80386 SX/16/20

UNIDENTIFIED

80386 SX/16/20

Processor

80386SX

Processor Speed

16/20MHz

Chip Set

C & T NEAT

Max. Onboard DRAM

8MB

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

JP1

Turbo switch

JP4

Power LED & keylock

JP2

Turbo LED

JP5

Speaker

JP3

External battery

JP6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

NPU mode select synchronous with CPU

JP8

Closed

 

NPU mode select asynchronous with CPU

JP8

Open

NPU disabled

JP9

Closed

 

NPU enabled

JP9

Open

Pipeline mode enabled

JP10

Closed

 

Pipeline mode disabled

JP10

Open

Monitor type select color

JP11

Closed

 

Monitor type select monochrome

JP11

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(18) 41256

NONE

NONE

NONE

512KB

NONE

NONE

(2) 256K x 9

NONE

640KB

(18) 41256

(18) 4164

NONE

NONE

640KB

NONE

NONE

(2) 256K x 9

(2) 64K x 9

1MB

(18) 41256

(18) 41256

NONE

NONE

1MB

NONE

NONE

(2) 256K x 9

(2) 256K x 9

1.5MB

(18) 41256

(18) 41256

(2) 256K x 9

NONE

1.64MB

(18) 41256

(18) 4164

(2) 256K x 9

(2) 256K x 9

2MB

(18) 41256

(18) 41256

(2) 256K x 9

(2) 256K x 9

2MB

(18) 411000

NONE

NONE

NONE

2MB

NONE

NONE

(2) 1M x 9

NONE

3MB

(18) 41256

(18) 41256

(2) 1M x 9

NONE

4MB

(18) 411000

(18) 411000

NONE

NONE

4MB

NONE

NONE

(2) 1M x 9

(2) 1M x 9

4.64MB

(18) 41256

(18) 4164

(2) 1M x 9

(2) 1M x 9

5MB

(18) 41256

(18) 41256

(2) 1M x 9

(2) 1M x 9

6MB

(18) 411000

(18) 411000

(2) 1M x 9

NONE

8MB

(18) 411000

(18) 411000

(2) 1M x 9

(2) 1M x 9

DRAM JUMPER CONFIGURATION

Size

JP12

512KB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

512KB

pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed

640KB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

640KB

pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed

1MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

1MB

pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed

1.5MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

1.64MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

2MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

2MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

2MB

pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed

DRAM JUMPER CONFIGURATION (CONT)

Size

JP12

3MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

4MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

4MB

pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed

4.64MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

5MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

6MB

pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and 17 & 18 closed

8MB

pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and 16 & 17 closed

BATTERY CONFIGURATION

Type

JP6

JP7

Internal

pins 2 & 3 closed

pins 2 & 3 closed

External

Closed

pins 1 & 2 closed