LEADING EDGE PRODUCTS, INC.

MODEL D2

Processor

80286

Processor Speed

8/10MHz

Chip Set

Zymos

Max. onboard DRAM

1MB

Cache

None

BIOS

Leading Edge

Dimensions

330mm x 330mm

I/O Options

Floppy drive interface, parallel port, serial port

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Parallel port

CN1

Speaker

CN4

Serial port (25 pin)

CN2

Power LED & keylock

CN5

Floppy drive interface

CN3

Keyboard connector

CN6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Floppy drive interface enabled

J7

Closed

 

Floppy drive interface disabled

J7

Open

»

Floppy drive interface address select primary

J8

pins 2 & 3 closed

 

Floppy drive interface address select secondary

J8

pins 1 & 2 closed

»

BIOS select 1 wait state

J25

pins 2 & 3 closed

 

BIOS select 0 wait states

J25

pins 1 & 2 closed

»

CPU speed select 10MHz

J26

pins 2 & 3 closed

 

CPU speed select 8MHz

J26

pins 1 & 2 closed

»

Monitor type select monochrome

J27

pins 2 & 3 closed

 

Monitor type select color

J27

pins 1 & 2 closed

»

Factory configured - do not alter

J28

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

J23

J24

640KB

(16) 41256

(16) 4164

NONE

pins 2 & 3

pins 2 & 3

1024KB

(16) 41256

(16) 41256

NONE

pins 2 & 3

pins 1 & 2

1152KB

(16) 41256

(16) 4164

(16) 41256

pins 1 & 2

pins 2 & 3

Note:Pins designated should be in the closed position.

SERIAL PORT CONFIGURATION

COM1

COM2

IRQ

J5

J6

»

COM1

Disabled

4

pins 1 & 2 closed

pins 1 & 2 closed

 

COM1

Disabled

3

pins 1 & 2 closed

pins 2 & 3 closed

 

Disabled

COM2

3

pins 2 & 3 closed

pins 2 & 3 closed

 

Disabled

COM2

4

pins 2 & 3 closed

pins 1 & 2 closed

 

Disabled

Disabled

N/A

pins 1, 2 & 3 closed

N/A

PARALLEL PORT CONFIGURATION

LPT1

LPT2

IRQ

J3

J4

»

LPT1

Disabled

7

pins 1 & 2 closed

pins 1 & 2 closed

 

LPT1

Disabled

5

pins 2 & 3 closed

pins 1 & 2 closed

 

Disabled

LPT2

5

pins 2 & 3 closed

pins 2 & 3 closed

 

Disabled

LPT2

7

pins 1 & 2 closed

pins 2 & 3 closed

 

Disabled

Disabled

N/A

N/A

pins 1, 2, & 3 closed