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SYSTEM V486/XX SDT REV. 3

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.