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386NSX

DEICO ELECTRONICS, INC.

386NSX

Processor

80386SX

Processor Speed

16/20/25MHz

Chip Set

OPTI

Max. Onboard DRAM

16MB

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

Parallel port, serial ports (2), floppy drive interface, IDE interface, bus mouse port

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

J13

Reset switch

J19

Serial port 2

J14

Speaker

J21

Parallel port

J15

Power LED & keylock

J22

IDE interface

J16

Turbo switch

J23 pins 1 & 2

Floppy drive interface

J17

Turbo LED

J23 pins 2 & 3

IDE interface LED

J18

External battery

R1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Serial port 2 select IRQ3

W1

pins 1 & 2 closed

 

Serial port 2 select IRQ9

W1

pins 2 & 3 closed

 

Serial port 2 disabled

W1

pins 3 & 4 closed

Serial port 1 select IRQ4

W2

pins 1 & 2 closed

 

Serial port 1 select IRQ5

W2

pins 2 & 3 closed

 

Serial port 1 disabled

W2

pins 3 & 4 closed

Parallel IRQ select IRQ7

W3

pins 1 & 2 closed

 

Parallel IRQ select IRQ5

W3

pins 2 & 3 closed

 

Parallel port select no interrupt

W3

pins 3 & 4 closed

 

Flash BIOS reprogram mode enabled

W4

pins 1 & 2 closed

 

Flash BIOS reprogram mode disabled

W4

pins 2 & 3 closed

Monitor type select color

W5

pins 1 & 2 closed

 

Monitor type select monochrome

W5

pins 2 & 3 closed

BIOS address line normal operation

W6

pins 2 & 3 closed

 

BIOS address line inverted

W6

pins 1 & 2 closed

Mouse IRQ select IRQ9

W7

pins 1 & 2 closed

 

Mouse IRQ select IRQ5

W7

pins 2 & 3 closed

CMOS memory normal operation

W8

pins 1 & 2 closed

 

CMOS memory clear

W8

pins 2 & 3 closed

Factory configured - do not alter

W9

pins 1 & 2 closed

Battery type select internal

W11

Closed

 

Battery type select external

W11

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

2MB

(2) 1M x 9

NONE

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

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

CPU SPEED CONFIGURATION

Size

W9

W10

16MHz

pins 2 & 3 closed

Open

20MHz

pins 1 & 2 closed

pins 1 & 2 closed

25MHz

pins 1 & 2 closed

pins 2 & 3 closed