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SYSTEMS 4XX/V, 4XXS/V, 4XX/DV, 4XXS/DV

DELL COMPUTER CORPORATION

SYSTEMS 4XX/V, 4XXS/V, 4XX/DV, 4XXS/DV

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

64MB

Cache

128/256KB

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), VGA feature connector, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

VGA connector

CN8

Serial port 1

CN2

VGA feature connector

CN9

Serial port 2

CN3

IDE interface LED

CN11

External battery

CN4

Speaker

CN12

Parallel port

CN5

Power LED

CN13

IDE interface

CN6

Reset switch

CN14

Floppy drive interface

CN7

32-bit VESA local bus slots

SL1 & SL2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Built in VGA subsystem enabled

JP1

Closed

 

Built in VGA subsystem disabled

JP1

Open

On board VGA disabled

JP2

Closed

On board VGA enabled

JP2

Open

VGA IRQ9 disabled

JP3

Closed

 

VGA IRQ9 enabled

JP3

Open

On board mouse enabled (IRQ12)

JP4

Closed

 

On board mouse disabled (IRQ12)

JP4

Open

Factory configured - do not alter

JP7

Closed

80486SX installed in PQFP

JP10

Open

 

80486SX not installed in PQFP

JP10

Closed

Factory configured - do not alter

JP11

Open

256K of cache memory installed

JP12

Closed

 

Zero or 128K of cache memory installed

JP12

Open

Note:The exact location of JP11 on system board is unidentified by the manufacturer.

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

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U42)

TAG (U27)

0KB

NONE

NONE

NONE

NONE

128KB

(4) 32K x 8

NONE

(1) 16K x 1

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 16K x 1

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

128KB

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

CPU Type

JP13

JP14

JP15

80486SX

Open

Open

pins 2 & 3 closed

80486DX

Closed

pins 1 & 2 closed

pins 1 & 2 closed

80486DX2

Closed

pins 1 & 2 closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JP5

JP6

33MHz

Open

Closed

50iMHz

Closed

Open

66iMHz

Open

Closed