HwMuseum | Index

LEADING EDGE PRODUCTS, INC.

MODEL D4 PLUS

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

25/33/50(internal)/66(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

64/128/256KB (on CPU card)

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

External CPU card, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

Floppy drive interface

CN6

Serial port 1

CN3

IDE interface

CN7

Serial port 2

CN4

CPU card slot

SL1

Parallel port

CN5

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP1

Closed

 

Monitor type select monochrome

JP1

Open

»

Parallel port enabled (printer)

JP2

Open

 

Parallel port disabled

JP2

Closed

»

CMOS memory normal operation

JP3

pins 1 & 2 closed

 

CMOS memory clear

JP3

pins 2 & 3 closed

»

Standard local bus card installed

JP5

pins 1 & 2 closed

 

Standard local bus card not installed

JP5

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U12)

TAG (U13)

64KB

(4) 8K x 8

(4) 8K x 8

NONE

(1) 8K x 8

128KB

(4) 32K x 8

NONE

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

CACHE JUMPER/SWITCH CONFIGURATION

Size

JP1

SW1/1

SW1/2

SW1/3

SW1/4

64KB

pins 2 & 3 closed

Off

Off

Off

Off

128KB

pins 1 & 2 closed

On

Off

Off

On

256KB

pins 2 & 3 closed

On

On

Off

On

CPU TYPE CONFIGURATION

Type

JP3

80486SX

pins 5 & 6 closed

80487SX

pins 2 & 3, 4 & 5, 6 & 7 closed

80486DX

pins 1 & 2, 4 & 5, 6 & 7 closed

80486DX2

pins 1 & 2, 4 & 5, 6 & 7 closed