LEADING EDGE PRODUCTS, INC.

MODEL D3/SX (VERSION 1)

Processor

80386SX

Processor Speed

16MHz

Chip Set

Zymos

Max. onboard DRAM

4MB

Cache

None

BIOS

Leading Edge

Dimensions

325mm x 308mm

I/O Options

Floppy drive interface, mouse port, parallel port, serial ports (2)

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Mouse port

CN1

Parallel port

CN4

Serial port 2

CN2

Floppy drive interface

CN5

Serial port 1

CN3

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Floppy drive interface enabled

J19

pins 2 & 3 closed

 

Floppy drive interface disabled

J19

pins 1 & 2 closed

»

Monitor type select color

J26

pins 2 & 3 closed

 

Monitor type select monochrome

J26

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

J22

J23

512KB

(2) 256K x 9

None

pins 2 & 3

pins 2 & 3

1MB

(2) 256K x 9

(2) 256K x 9

pins 1 & 2

pins 2 & 3

2MB

(2) 1M x 9

NONE

pins 2 & 3

pins 1 & 2

4MB

(2) 1M x 9

(2) 1M x 9

pins 1 & 2

pins 1 & 2

Note:Pins designated should be in the closed position.

PARALLEL PORT CONFIGURATION

IRQ

ADDRESS

J17

J20

»

7

378h

pins 2 & 3 closed

pins 2 & 3 closed

 

5

378h

pins 2 & 3 closed

pins 1 & 2 closed

 

7

278h

pins 1 & 2 closed

pins 2 & 3 closed

 

5

278h

pins 1 & 2 closed

pins 1 & 2 closed

 

Disabled

Disabled

Open

Open

SERIAL PORT CONFIGURATION

Port 1

Port 2

J16

J18

»

COM1

COM2

pins 1 & 2 closed

pins 1 & 2 closed

 

COM1

COM4

pins 2 & 3 closed

pins 1 & 2 closed

 

COM1

Disabled

Open

pins 1 & 2 closed

 

COM3

COM2

pins 1 & 2 closed

pins 2 & 3 closed

 

Disabled

COM2

pins 1 & 2 closed

Open

 

COM3

COM4

pins 2 & 3 closed

pins 2 & 3 closed

 

Disabled

COM4

pins 2 & 3 closed

Open

 

Disabled

Disabled

Open

Open

MOUSE PORT INTERRUPTS

IRQ

J11

J12

J13

J14

»

IRQ9

Closed

Open

Open

Open

 

IRQ3

Open

Closed

Open

Open

 

IRQ4

Open

Open

Closed

Open

 

IRQ5

Open

Open

Open

Closed