4XX/M, 4XXS/M Motherboard Settings and Configuration

DELL COMPUTER CORPORATION

4XX/M, 4XXS/M

Processor
80486SX/80486DX/80486DX2
Processor Speed
25/33/50(internal)/66(internal)MHz
Chip Set
LSI
Max. Onboard DRAM
64MB
Cache
128KB (on external cache card)
BIOS
Phoenix
Dimensions
330mm x 218mm
I/O Options
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
IDE interface
CN8
Serial port 1
CN2
IDE interface LED
J1
Serial port 2
CN3
Chassis fan power
J2
Parallel port
CN4
External battery
J3
VGA port
CN5
Front panel connector
J4
VGA feature connector
CN6
External cache card slot
SL1
Floppy drive interface
CN7

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
External cache card not installed
JP1
Closed

External cache card installed
JP1
Open
»
Password enabled
JP2
Closed

Password disabled
JP2
Open
»
Factory configured - do not alter
JP3
Open
»
Flash BIOS write protect disabled
JP4
Closed

Flash BIOS write protect enabled
JP4
Open
»
On board VGA enbled
JP5
Closed

On board VGA disabled
JP5
Open
»
Factory configured - do not alter
JP6
Open
»
Factory configured - do not alter
JP7
Open
»
Factory configured - do not alter
JP10
Open
»
Factory configured - do not alter
JP11
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
JP8
JP9
25MHz
Closed
Open
33MHz
Open
Closed
50iMHz
Closed
Open
66iMHz
Open
Closed

VIDEO MEMORY CONFIGURATION
Size
Bank 0
Bank 1
512KB
(4) 256K x 4
NONE
1MB
(4) 256K x 4
(4) 256K x 4
Note: Bank 0 is factory installed and is not configurable.

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Processor	80486SX/80486DX/80486DX2
Processor Speed	25/33/50(internal)/66(internal)MHz
Chip Set	LSI
Max. Onboard DRAM	64MB
Cache	128KB (on external cache card)
BIOS	Phoenix
Dimensions	330mm x 218mm
I/O Options	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	IDE interface	CN8
Serial port 1	CN2	IDE interface LED	J1
Serial port 2	CN3	Chassis fan power	J2
Parallel port	CN4	External battery	J3
VGA port	CN5	Front panel connector	J4
VGA feature connector	CN6	External cache card slot	SL1
Floppy drive interface	CN7

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	External cache card not installed	JP1	Closed
	External cache card installed	JP1	Open
»	Password enabled	JP2	Closed
	Password disabled	JP2	Open
»	Factory configured - do not alter	JP3	Open
»	Flash BIOS write protect disabled	JP4	Closed
	Flash BIOS write protect enabled	JP4	Open
»	On board VGA enbled	JP5	Closed
	On board VGA disabled	JP5	Open
»	Factory configured - do not alter	JP6	Open
»	Factory configured - do not alter	JP7	Open
»	Factory configured - do not alter	JP10	Open
»	Factory configured - do not alter	JP11	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	JP8	JP9
25MHz	Closed	Open
33MHz	Open	Closed
50iMHz	Closed	Open
66iMHz	Open	Closed

VIDEO MEMORY CONFIGURATION
Size	Bank 0	Bank 1
512KB	(4) 256K x 4	NONE
1MB	(4) 256K x 4	(4) 256K x 4
Note: Bank 0 is factory installed and is not configurable.