DELL COMPUTER CORPORATION

SYSTEM V486/XX SDT REV. 3

Processor

80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

LSI

Max. Onboard DRAM

64MB

Cache

None

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Parallel port connector

CN1

IDE interface

CN5

Serial port 1

CN2

VGA connector

CN6

Serial port 2

CN2

Fan connector

CN7

PS/2 mouse port

CN3

IDE interface LED

CN8

Floppy drive interface

CN4

External battery connector

CN9

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Mouse connector enabled at IRQ12

J1

Closed

 

Mouse connector disabled

J1

Open

»

I/O address is 26Eh-26Fh

J2

Closed

 

I/O address is 398h-399h

J2

Open

»

Factory configured do not alter

J3

Open

»

Factory configured do not alter

J4

Closed

»

Enables password feature

J5

Closed

 

Disables password feature

J5

Closed

»

Enables on-board VGA controller

J6

Closed

 

Disables on-board VGA controller

J6

Open

»

Factory configured do not alter

J7

Open

»

Factory configured do not alter

J10

Open

»

Factory configured do not alter

J11

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

CPU SPEED CONFIGURATION

Speed

J8

J9

25MHz

Open

Closed

33MHz

Closed

Open

50iMHz

Open

Closed

66iMHz

Closed

Open

VRAM CONFIGURATION

Size

Bank 0

Bank 1

512K

(4) 256K x 4

None

1MB

(4) 256K x 4

(4) 256K x 4

Note:Bank 0 is factory installed and not configurable.