System 4XXDE Motherboard Settings and Configuration

DELL COMPUTER CORPORATION

System 4XXDE

Processor
80486SX/80487SX/80486DX
Processor Speed
20/25/33/50MHz
Chip Set
VLSI
Max. Onboard DRAM
48MB (96MB on revision 1.1 or higher)
Cache
None (128KB on 450DE and 433DE)
BIOS
AMI
Dimensions
329mm x 334mm
I/O Options
32-bit external CPU card slot, bus mouse, floppy drive interface, IDE interface, status LCD, parallel port, serial ports (2), VGA port
NPU Options
None (4167 on 433DE)

CONNECTIONS
Purpose
Location
Purpose
Location
VGA port
CN1
External battery
JBAT
Parallel port
CN2
Cooling fan
JFAN
Serial port 2
CN3
VGA pass-through
JFEAT
Serial port 1
CN4
Primary floppy drive interface
JFLOP
Bus mouse port
CN5
IDE interface
JIDE
Board ground points
GND
Front panel status LCD
JVIEW
IDE interface LED
JLED
Reset switch
RSET

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Boot EEPROM write/clear enabled
BOOT
Closed

Boot EEPROM write/clear disabled
BOOT
Open
»
Factory test disabled
MNT
Open

Factory test enabled
MNT
Closed
»
VGA interface enabled
SW1/1
Off

VGA interface disabled
SW1/1
On
»
Monitor type select fixed frequency
SW1/2
Off

Monitor type select multi frequency
SW1/2
On
»
Password check enabled
SW1/3
On

Password check disabled
SW1/3
Off
»
BIOS chip select flash EEPROM
SW1/4
Off

BIOS chip select auxiliary ROM
SW1/4
On

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
Bank 4
Bank 5
4MB
(1)512K x 36
(1)512K x 36
NONE
NONE
NONE
NONE
6MB
(1)512K x 36
(1)512K x 36
(1)256K x 36
(1)256K x 36
NONE
NONE
6MB
(1)256K x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36
8MB
(1)512K x 36
(1)512K x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36
8MB
(1)512K x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
NONE
NONE
8MB
(1) 1M x 36
(1) 1M x 36
NONE
NONE
NONE
NONE
10MB
(1)512K x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
(1)256K x 36
(1)256K x 36
10MB
(1) 1M x 36
(1) 1M x 36
(1)256K x 36
(1)256K x 36
NONE
NONE
12MB
(1) 1M x 36
(1) 1M x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36
12MB
(1) 1M x 36
(1) 1M x 36
(1)512K x 36
(1)512K x 36
NONE
NONE
12MB
(1)512K x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
14MB
(1) 1M x 36
(1) 1M x 36
(1)512K x 36
(1)512K x 36
(1)256K x 36
(1)256K x 36
16MB
(1) 1M x 36
(1) 1M x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
16MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
NONE
NONE
16MB
(1) 2M x 36
(1) 2M x 36
NONE
NONE
NONE
NONE
18MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1)256K x 36
(1)256K x 36
18MB
(1) 2M x 36
(1) 2M x 36
(1)256K x 36
(1)256K x 36
NONE
NONE
20MB
(1) 2M x 36
(1) 2M x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36
(1)256K x 36

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
Bank 4
Bank 5
20MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1)512K x 36
(1)512K x 36
20MB
(1) 2M x 36
(1) 2M x 36
(1)512K x 36
(1)512K x 36
NONE
NONE
22MB
(1) 2M x 36
(1) 2M x 36
(1)512K x 36
(1)512K x 36
(1)256K x 36
(1)256K x 36
24MB
(1) 2M x 36
(1) 2M x 36
(1) 1M x 36
(1) 1M x 36
NONE
NONE
24MB
(1) 2M x 36
(1) 2M x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
(1)512K x 36
26MB
(1) 2M x 36
(1) 2M x 36
(1) 1M x 36
(1) 1M x 36
(1)256K x 36
(1)256K x 36
28MB
(1) 2M x 36
(1) 2M x 36
(1) 1M x 36
(1) 1M x 36
(1)512K x 36
(1)512K x 36
32MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
NONE
NONE
32MB
(1) 2M x 36
(1) 2M x 36
(1) 1M 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
NONE
NONE
34MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1)256K x 36
(1)256K x 36
34MB
(1) 4M x 36
(1) 4M x 36
(1)256K x 36
(1)256K x 36
NONE
NONE
36MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1)512K x 36
(1)512K x 36
38MB
(1) 4M x 36
(1) 4M x 36
(1)512K x 36
(1)512K x 36
(1)256K x 36
(1)256K x 36
40MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 1M x 36
(1) 1M x 36
40MB
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
NONE
NONE
42MB
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
(1)256K x 36
(1)256K x 36
48MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
48MB
(1) 4M x 36
(1) 4M x 36
(1) 2M x 36
(1) 2M x 36
NONE
NONE
50MB
(1) 4M x 36
(1) 4M x 36
(1) 2M x 36
(1) 2M x 36
(1)256K x 36
(1)256K x 36
52MB
(1) 4M x 36
(1) 4M x 36
(1) 2M x 36
(1) 2M x 36
(1)512K x 36
(1)512K x 36
56MB
(1) 4M x 36
(1) 4M x 36
(1) 2M x 36
(1) 2M x 36
(1) 1M x 36
(1) 1M x 36
64MB
(1) 4M x 36
(1) 4M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
64MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
NONE
NONE
66MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1)256K x 36
(1)256K x 36
68MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1)512K x 36
(1)512K x 36
72MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
80MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 2M x 36
(1) 2M x 36
96MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36

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System 4XXDE Motherboard Settings and Configuration

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Processor	80486SX/80487SX/80486DX
Processor Speed	20/25/33/50MHz
Chip Set	VLSI
Max. Onboard DRAM	48MB (96MB on revision 1.1 or higher)
Cache	None (128KB on 450DE and 433DE)
BIOS	AMI
Dimensions	329mm x 334mm
I/O Options	32-bit external CPU card slot, bus mouse, floppy drive interface, IDE interface, status LCD, parallel port, serial ports (2), VGA port
NPU Options	None (4167 on 433DE)

CONNECTIONS
Purpose	Location	Purpose	Location
VGA port	CN1	External battery	JBAT
Parallel port	CN2	Cooling fan	JFAN
Serial port 2	CN3	VGA pass-through	JFEAT
Serial port 1	CN4	Primary floppy drive interface	JFLOP
Bus mouse port	CN5	IDE interface	JIDE
Board ground points	GND	Front panel status LCD	JVIEW
IDE interface LED	JLED	Reset switch	RSET

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Boot EEPROM write/clear enabled	BOOT	Closed
	Boot EEPROM write/clear disabled	BOOT	Open
»	Factory test disabled	MNT	Open
	Factory test enabled	MNT	Closed
»	VGA interface enabled	SW1/1	Off
	VGA interface disabled	SW1/1	On
»	Monitor type select fixed frequency	SW1/2	Off
	Monitor type select multi frequency	SW1/2	On
»	Password check enabled	SW1/3	On
	Password check disabled	SW1/3	Off
»	BIOS chip select flash EEPROM	SW1/4	Off
	BIOS chip select auxiliary ROM	SW1/4	On

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3	Bank 4	Bank 5
4MB	(1)512K x 36	(1)512K x 36	NONE	NONE	NONE	NONE
6MB	(1)512K x 36	(1)512K x 36	(1)256K x 36	(1)256K x 36	NONE	NONE
6MB	(1)256K x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36
8MB	(1)512K x 36	(1)512K x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36
8MB	(1)512K x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36	NONE	NONE
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE	NONE	NONE
10MB	(1)512K x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36	(1)256K x 36	(1)256K x 36
10MB	(1) 1M x 36	(1) 1M x 36	(1)256K x 36	(1)256K x 36	NONE	NONE
12MB	(1) 1M x 36	(1) 1M x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1)512K x 36	(1)512K x 36	NONE	NONE
12MB	(1)512K x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36
14MB	(1) 1M x 36	(1) 1M x 36	(1)512K x 36	(1)512K x 36	(1)256K x 36	(1)256K x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	NONE	NONE
16MB	(1) 2M x 36	(1) 2M x 36	NONE	NONE	NONE	NONE
18MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1)256K x 36	(1)256K x 36
18MB	(1) 2M x 36	(1) 2M x 36	(1)256K x 36	(1)256K x 36	NONE	NONE
20MB	(1) 2M x 36	(1) 2M x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36	(1)256K x 36

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3	Bank 4	Bank 5
20MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1)512K x 36	(1)512K x 36
20MB	(1) 2M x 36	(1) 2M x 36	(1)512K x 36	(1)512K x 36	NONE	NONE
22MB	(1) 2M x 36	(1) 2M x 36	(1)512K x 36	(1)512K x 36	(1)256K x 36	(1)256K x 36
24MB	(1) 2M x 36	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36	NONE	NONE
24MB	(1) 2M x 36	(1) 2M x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36	(1)512K x 36
26MB	(1) 2M x 36	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36	(1)256K x 36	(1)256K x 36
28MB	(1) 2M x 36	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36	(1)512K x 36	(1)512K x 36
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	NONE	NONE
32MB	(1) 2M x 36	(1) 2M x 36	(1) 1M 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	NONE	NONE
34MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1)256K x 36	(1)256K x 36
34MB	(1) 4M x 36	(1) 4M x 36	(1)256K x 36	(1)256K x 36	NONE	NONE
36MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1)512K x 36	(1)512K x 36
38MB	(1) 4M x 36	(1) 4M x 36	(1)512K x 36	(1)512K x 36	(1)256K x 36	(1)256K x 36
40MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36
40MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	NONE	NONE
42MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1)256K x 36	(1)256K x 36
48MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
48MB	(1) 4M x 36	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36	NONE	NONE
50MB	(1) 4M x 36	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36	(1)256K x 36	(1)256K x 36
52MB	(1) 4M x 36	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36	(1)512K x 36	(1)512K x 36
56MB	(1) 4M x 36	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36
64MB	(1) 4M x 36	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	NONE	NONE
66MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1)256K x 36	(1)256K x 36
68MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1)512K x 36	(1)512K x 36
72MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36
80MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36
96MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36