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4DX2-66

INTEL CORPORATION

4DX2-66

Processor

80486DX/ODP486DX/80486DX2/80486DX4/P24D/P24T

Processor Speed

25/50(internal)/50/66(internal)/75(internal)/100(internal)MHz

Chip Set

Unidentified

Video Chip Set

Cirrus Logic

Maximum Onboard Memory

64MB

Maximum Video Memory

1MB

Cache

128KB

BIOS

Phoenix

Dimensions

254mm x 218mm

I/O Options

32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VESA feature connector, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

VESA feature connector

CN1

IDE interface 1

J21

PS/2 mouse port

J1

Power LED & keylock

J29

VGA port

J4

Reset switch

J32

Serial port 1

J12

IDE interface LED

J34

Serial port 2

J13

Speaker

J37

Parallel port

J17

Turbo LED

J40

Floppy drive interface

J18

Chassis fan power

J41

IDE interface 2

J19

32-bit PCI slots

PC1 - PC3

USER CONFIGURABLE SETTINGS

Function

Label

Position

Secondary IDE DMA disabled

J26

Pins 2 & 3 closed

 

Secondary IDE DMA enabled

J26

Pins 1 & 2 closed

Password normal operation

J31

Open

 

Password clear

J31

Closed

Boot block normal operation

J35

Pins 2 & 3 closed

 

Boot block boot from floppy

J35

Pins 1 & 2 closed

On board I/O enabled

J36

Pins 2 & 3 closed

 

On board I/O disabled

J36

Pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(1) 1M x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

8MB

(1) 2M x 36

None

12MB

(1) 2M x 36

(1) 1M x 36

16MB

(1) 2M x 36

(1) 2M x 36

16MB

(1) 4M x 36

None

20MB

(1) 4M x 36

(1) 1M x 36

24MB

(1) 4M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

32MB

(1) 8M x 36

None

36MB

(1) 1M x 36

(1) 8M x 36

40MB

(1) 2M x 36

(1) 8M x 36

48MB

(1) 4M x 36

(1) 8M x 36

64MB

(1) 8M x 36

(1) 8M x 36

Note: Board also accepts x 32 SIMMs. Banks are interchangeable.

DRAM TYPE CONFIGURATION

Type

J30

x 32 SIMMs

Pins 2 & 3 closed

x 36 SIMMs

Pins 1 & 2 closed

CACHE CONFIGURATION

Size

Bank 0

128KB

128KB

Note: The location of bank 0 is unidentified. The size of the cache chips are unidentified.

CACHE JUMPER CONFIGURATION

Size

J24

J25

128KB

Pins 2 & 3 closed

Pins 2 & 3 closed

VIDEO MEMORY CONFIGURATION

Note: Board is factory installed with 1MB of video memory and is not configurable. The location is unidentified.

CPU SPEED SELECTION

Speed

J39

25MHz

Pins 2 & 3 closed

50iMHz

Pins 2 & 3 closed

66iMHz

Pins 1 & 2 closed

75iMHz

Pins 2 & 3 closed

100iMHz

Pins 1 & 2 closed

CPU TYPE SELECTION

Type

J38

80486DX

Pins 3 & 4 closed

ODP486DX

Pins 1 & 2 closed

80486DX2

Pins 3 & 4 closed

8086DX4

Pins 3 & 4 closed

P24D

Pins 5 & 6 closed

P24T

Pins 5 & 6 closed

CPU TYPE SELECTION

Type

J27

SL-series

Pins 2 & 3 closed

 

Non SL-series

Pins 1 & 2 closed

Note: Do not change this from the default setting.

CPU MULTIPLIER SELECTION

Multiplier

J33

 

Reserved

Pins 1 & 2 closed

 

2x

Pins 2 & 3 closed

3x

Open

CPU VOLTAGE SELECTION

Voltage

J3

 

3.3v

Pins 1 & 3, 2 & 4 closed

5v

Pins 3 & 5, 4 & 6 closed

DMA CHANNEL SELECTION

Channel

J22

J23

1

Pins 1 & 2 closed

Pins 1 & 2 closed

 

3

Pins 2 & 3 closed

Pins 2 & 3 closed