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XPS 486 MIDSIZE

DELL COMPUTER CORPORATION

XPS 486 MIDSIZE

Processor

80486DX2/80486DX4

Processor Speed

66(internal)/100(internal)MHz

Chip Set

Micronics

Max. Onboard DRAM

64MB

Cache

256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

IDE interface LED

J1

Serial port 2

CN2

Power LED & keylock

J2

PS/2 mouse port

CN3

Reset switch

J3

Parallel port

CN4

Speaker

J4

Floppy drive interface

CN5

Turbo switch

J5

IDE interface 1

CN6

Turbo LED

J6

IDE interface 2

CN7

32-bit VESA Local bus slots

SL1 & SL2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

W1

Closed

Monitor type select color

W2

Closed

 

Monitor type select monochrome

W2

Open

Mouse IRQ12 enabled

W3

Closed

 

Mouse IRQ12 disabled

W3

Open

CMOS memory clear

W5

Closed

 

CMOS memory normal operation

W5

Open

Factory configured - do not alter

W8

pins 2 & 3 closed

Factory configured - do not alter

W10

pins 2 & 3 closed

Factory configured - do not alter

W11

pins 2 & 3 closed

CPU type select - Intel DX/DX2/DX4/Pentium Overdrive

W12

pins 1 & 2 closed

 

CPU type select - Intel SX

W12

pins 2 & 3 closed

Factory configured - do not alter

W13

Open

Factory configured - do not alter

W16

pins 2 & 3 closed

Factory configured - do not alter

W17

pins 2 & 3 closed

Factory configured - do not alter

W18

Open

Factory configured - do not alter

W19

pins 2 & 3 closed

Factory configured - do not alter

W22

pins 2 & 3 closed

Factory configured - do not alter

W23

pins 2 & 3 closed

Factory configured - do not alter

W24

pins 2 & 3 closed

Factory configured - do not alter

W25

Open

IDE port 1 enabled

W34

pins 1 & 2 closed

 

IDE port 1 disabled

W34

pins 2 & 3 closed

 

Factory configured - do not alter

W35

Open

Parallel port type select IRQ7

W36

pins 1 & 2 closed

 

Parallel port type select IRQ5

W36

pins 2 & 3 closed

Factory configured - do not alter

W39

Open

Factory configured - do not alter

W40

Open

Factory configured - do not alter

SW1/1

On

Factory configured - do not alter

SW1/2

On

Factory configured - do not alter

SW1/3

Off

Factory configured - do not alter

SW1/4

Off

Note: The location of the factory configured jumpers is unidentified.

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) 1M x 36

(1) 4M x 36

NONE

NONE

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

NONE

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

NONE

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

DMA CHANNEL CONFIGURATION

DMA Channel

W37

W38

1

pins 1 & 2 closed

pins 1 & 2 closed

3

pins 2 & 3 closed

pins 2 & 3 closed