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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 (CON’T)

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