...because we can't all be on the bleeding edge...





DIMENSION 486SX/25, 486DX/33, 486DX2/50

DELL COMPUTER CORPORATION

DIMENSION 486SX/25, 486DX/33, 486DX2/50

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

64MB

SRAM Cache

64/256KB (optional module)

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, bus mouse port

parallel port, serial port (2), VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse

J1

IDE interface LED

J23

IDE interface

J5

Reset switch

J24

Floppy drive interface

J6

Speaker

J25

Parallel port

J8

Power LED & keylock

J26

Serial port (COM B)

J9

VGA port

J27

Serial port (COM A)

J10

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

W1

pins 1 & 2 closed

 

Monitor type select monochrome

W1

pins 2 & 3 closed

CMOS memory normal operation

W2

pins 1 & 2 closed

 

CMOS memory clear

W2

pins 2 & 3 closed

I/O bus speed select SYSCLK/2

W3

pins 2 & 3 closed

 

I/O bus speed select SYSCLK/1

W3

pins 1 & 2 closed

On-board VGA enabled

W10

pins 1 & 2 closed

 

On-board VGA disabled

W10

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

NONE

NONE

NONE

2MB

(1) 256K x 36

(1) 256K x 36

NONE

NONE

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

NONE

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

4MB

(1) 1M x 36

NONE

NONE

NONE

5MB

(1) 1M x 36

(1) 256K x 36

NONE

NONE

6MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

9MB

(1) 1M x 36

(1) 1M x 36

(1) 256K x 36

NONE

10MB

(1) 1M x 36

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

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

17MB

(1) 4M x 36

(1) 256K x 36

NONE

NONE

18MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

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

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

33MB

(1) 4M x 36

(1) 4M x 36

(1) 256K x 36

NONE

34MB

(1) 4M x 36

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

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

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

CPU TYPE CONFIGURATION

CPU

Jumper W6

Jumper W7

Jumper W8

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

80487SX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

open

SRAM JUMPER CONFIGURATION

Size

Jumper W4

Jumper W5

Jumper W9

64KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

256KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

VIDEO SWITCH CONFIGURATION (SW1)

Mode

switch 1

switch 2

switch 3

switch 4

switch 5

56Hz vertical refresh

open

open

N/A

N/A

N/A

60Hz vertical refresh

open

closed

N/A

N/A

N/A

72Hz vertical refresh

closed

open

N/A

N/A

N/A

Enable interlaced

N/A

N/A

open

open

N/A

60Hz non-interlaced

N/A

N/A

open

closed

N/A

72Hz non-interlaced

N/A

N/A

closed

open

N/A

31.5KHz horizontal scan rate

N/A

N/A

N/A

N/A

open

40KHz horizontal scan rate

N/A

N/A

N/A

N/A

closed

VRAM CONFIGURATION

Size

VRAM

SW1/switch 6

512KB

(2) 256K x 4

closed

1MB

(4) 256K x 4

open