DESKPRO XE 486 Motherboard Settings and Configuration

COMPAQ COMPUTER CORPORATION

DESKPRO XE 486

Processor
80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed
25/33/50(internal)/66(internal)MHz
Chip Set
Compaq
Max. Onboard DRAM
32MB
Cache
64/256KB (on external cache card)
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
External cache card, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial port, VGA port
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
PS/2 mouse port
CN1
Floppy drive interface
CN7
Parallel port
CN2
Speaker
J1
Serial port
CN3
Power LED & keylock
J2
VGA port
CN4
External battery
J3
Video memory upgrade
CN5
Riser card
SL1
IDE interface
CN6
External cache card
SL2

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Battery type select internal
J4
pins 1 & 2 closed

Battery type select external
J4
pins 2 & 3 closed
»
On board video enabled
SW502/1
Off

On board video disabled
SW502/1
On
»
Setup write protect disabled
SW502/2
Off

Setup write protect enabled
SW502/2
On
»
Floppy drive select read/write
SW502/3
Off
»
Floppy drive select read only
SW502/3
On
»
Factory configured - do not alter
SW502/4
Off
»
CMOS memory normal operation
SW502/5
Off

CMOS memory clear
SW502/5
On
»
Flash BIOS write protect enabled
SW502/6
Off

Flash BIOS write protect disabled
SW502/6
On

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
2MB
(1) 512K x 36
NONE
NONE
NONE
3MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
NONE
3MB
(1) 256K x 36
(1) 512K x 36
NONE
NONE
4MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
4MB
(1) 512K x 36
(1) 512K x 36
NONE
NONE
4MB
(1) 1M x 36
NONE
NONE
NONE
5MB
(1) 256K x 36
(1) 512K x 36
(1) 512K x 36
NONE
5MB
(1) 256K x 36
(1) 1M x 36
NONE
NONE
6MB
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
NONE
6MB
(1) 512K x 36
(1) 1M x 36
NONE
NONE
7MB
(1) 256K x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
8MB
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
(1) 512K x 36
8MB
(1) 1M x 36
(1) 1M x 36
NONE
NONE
8MB
(1) 2M x 36
NONE
NONE
NONE
9MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
NONE
9MB
(1) 256K x 36
(1) 2M x 36
NONE
NONE
10MB
(1) 512K x 36
(1) 1M x 36
(1) 1M x 36
NONE
10MB
(1) 512K x 36
(1) 2M x 36
NONE
NONE
12MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
NONE
12MB
(1) 1M x 36
(1) 2M x 36
NONE
NONE
13MB
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
14MB
(1) 512K x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
16MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
16MB
(1) 2M x 36
(1) 2M x 36
NONE
NONE
17MB
(1) 256K x 36
(1) 2M x 36
(1) 2M x 36
NONE
18MB
(1) 512K x 36
(1) 2M x 36
(1) 2M x 36
NONE

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
20MB
(1) 1M x 36
(1) 2M x 36
(1) 2M x 36
NONE
24MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
NONE
25MB
(1) 256K x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
26MB
(1) 512K x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
28MB
(1) 1M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
32MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36

CPU TYPE CONFIGURATION
Type
SW500/1
SW500/2
SW500/3
SW500/4
80486SX-33
Off
Off
Off
Off
80487SX-25
Off
On
On
On
ODP486SX-25/50
Off
On
On
On
ODP486SX-33/66
Off
On
On
Off
80486DX-33
On
Off
On
Off
80486DX2-50
On
Off
On
On
80486DX2-66
On
Off
On
Off

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DESKPRO XE 486 Motherboard Settings and Configuration

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Processor	80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed	25/33/50(internal)/66(internal)MHz
Chip Set	Compaq
Max. Onboard DRAM	32MB
Cache	64/256KB (on external cache card)
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	External cache card, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial port, VGA port
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
PS/2 mouse port	CN1	Floppy drive interface	CN7
Parallel port	CN2	Speaker	J1
Serial port	CN3	Power LED & keylock	J2
VGA port	CN4	External battery	J3
Video memory upgrade	CN5	Riser card	SL1
IDE interface	CN6	External cache card	SL2

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Battery type select internal	J4	pins 1 & 2 closed
	Battery type select external	J4	pins 2 & 3 closed
»	On board video enabled	SW502/1	Off
	On board video disabled	SW502/1	On
»	Setup write protect disabled	SW502/2	Off
	Setup write protect enabled	SW502/2	On
»	Floppy drive select read/write	SW502/3	Off
»	Floppy drive select read only	SW502/3	On
»	Factory configured - do not alter	SW502/4	Off
»	CMOS memory normal operation	SW502/5	Off
	CMOS memory clear	SW502/5	On
»	Flash BIOS write protect enabled	SW502/6	Off
	Flash BIOS write protect disabled	SW502/6	On

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
2MB	(1) 512K x 36	NONE	NONE	NONE
3MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	NONE
3MB	(1) 256K x 36	(1) 512K x 36	NONE	NONE
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
4MB	(1) 512K x 36	(1) 512K x 36	NONE	NONE
4MB	(1) 1M x 36	NONE	NONE	NONE
5MB	(1) 256K x 36	(1) 512K x 36	(1) 512K x 36	NONE
5MB	(1) 256K x 36	(1) 1M x 36	NONE	NONE
6MB	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36	NONE
6MB	(1) 512K x 36	(1) 1M x 36	NONE	NONE
7MB	(1) 256K x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
8MB	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE
8MB	(1) 2M x 36	NONE	NONE	NONE
9MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	NONE
9MB	(1) 256K x 36	(1) 2M x 36	NONE	NONE
10MB	(1) 512K x 36	(1) 1M x 36	(1) 1M x 36	NONE
10MB	(1) 512K x 36	(1) 2M x 36	NONE	NONE
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	NONE
12MB	(1) 1M x 36	(1) 2M x 36	NONE	NONE
13MB	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
14MB	(1) 512K x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 2M x 36	(1) 2M x 36	NONE	NONE
17MB	(1) 256K x 36	(1) 2M x 36	(1) 2M x 36	NONE
18MB	(1) 512K x 36	(1) 2M x 36	(1) 2M x 36	NONE

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
20MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	NONE
24MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	NONE
25MB	(1) 256K x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
26MB	(1) 512K x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
28MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36

CPU TYPE CONFIGURATION
Type	SW500/1	SW500/2	SW500/3	SW500/4
80486SX-33	Off	Off	Off	Off
80487SX-25	Off	On	On	On
ODP486SX-25/50	Off	On	On	On
ODP486SX-33/66	Off	On	On	Off
80486DX-33	On	Off	On	Off
80486DX2-50	On	Off	On	On
80486DX2-66	On	Off	On	Off