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SYSTEMS 4XX/L(V), 4XX/MX(V) OPTIPLEX

DELL COMPUTER CORPORATION

SYSTEMS 4XX/L(V), 4XX/MX(V) OPTIPLEX

Processor

80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Headland

Max. Onboard DRAM

64MB

Cache

128KB (on external cache card)

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

32-bit external cache card, 32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

Floppy drive interface

CN8

Serial port 1

CN2

IDE interface

CN9

Serial port 2

CN3

External battery

J3

Parallel port

CN4

Control panel connector

J4

VGA port

CN5

IDE interface LED

J5

Video memory upgrade module

CN6

Riser Card

SL1

VGA feature connector

CN7

32-bit VESA Local bus/cache slot

SL2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

VESA riser card disabled

J1 & J2

Closed

 

VESA riser card enabled

J1 & J2

Open

IDE IRQ enabled

J6

pins 2 & 3 closed

 

IDE IRQ disabled

J6

pins 1 & 2 closed

Factory configured - do not alter

J7

Open

PS/2 mouse (IRQ12) enabled

J8

Closed

 

PS/2 mouse (IRQ12) disabled

J8

Open

Factory configured - do not alter

J9

Open

Factory configured - do not alter

J10

Open

Flash BIOS write protect disabled

J11

Closed

 

Flash BIOS write protect enabled

J11

Open

CPU type select PGA

J12

Closed

 

CPU type select PQFP

J12

Open

CMOS memory normal operation

J13

Closed

 

CMOS memory clear

J13

Open

I/O controller address select 26Eh-26Fh

J14

Closed

 

I/O controller address select 398h-399h

J14

Open

Factory configured - do not alter

J15

Open

On board VGA enabled

J16

Closed

 

On board VGA disabled

J16

Open

Factory configured - do not alter

J17

Open

Factory configured - do not alter

J18

Open

Factory configured - do not alter

J20

Open

Factory configured - do not alter

J22

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 36

NONE

NONE

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

NONE

NONE

20MB

(1) 4M x 36

(1) 1M x 36

NONE

NONE

24MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

NONE

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

36MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

NONE

40MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

52MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

VESA CPU SPEED CONFIGURATION

Speed

J19

J21

25MHz

Open

Closed

33MHz

Closed

Open

50iMHz

Open

Closed

66iMHz

Closed

Open

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

CN6

512KB

(4) 128K x 8

NONE

NONE

1MB

(4) 128K x 8

(4) 128K x 8

NONE

2MB

(4) 128K x 8

(4) 128K x 8

Memory module

Note: Bank 0 is factory installed and is not configurable. To enable 2MB video memory, install memory module over Bank 1 in CN6 connectors.