CX386/cx386s/cx386s25/CX486/CX486(NEW)/CX486S25 Motherboard Settings and Configuration

Processor	80386SX/80386DX/80486SX/80487SX/80486DX/80486DX2 (depends on CPU board installed)
Processor Speed	20/25/33/50(internal)/66(internal)MHz (depends on CPU board installed)
Chip Set	Symphony/Texas (depends on CPU board installed)
Max. Onboard DRAM	16/32MB (depends on CPU board installed)
Cache	None
BIOS	ICL
Dimensions	220mm x 180mm
I/O Options	PS/2 mouse port (on CPU board), serial ports (2), parallel port, IDE interface, floppy drive interface
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Parallel port	CN1	Floppy drive interface	CN5
Serial port 2	CN2	Chassis fan power	JP1
Serial port 1	CN3	IDE interface LED	JP2
IDE interface	CN4

CONNECTIONS
Purpose	Location
PS/2 mouse port	CN1

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	T01A	N/A
»	Factory configured - do not alter	W04	N/A
»	CMOS memory normal operation	W05	pins 1 & 2 closed
	CMOS memory clear	W05	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(2) 256K x 9	(2) 256K x 9	NONE	NONE
1.5MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	NONE
2MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	NONE	NONE	NONE
3MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	NONE
4MB	(2) 1M x 9	(2) 1M x 9	NONE	NONE
5MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	(2) 1M x 9
6MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	NONE

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
8MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE	NONE	NONE
10MB	(2) 1M x 9	NONE	(2) 4M x 9	NONE
12MB	(2) 1M x 9	(2) 1M x 9	(2) 4M x 9	NONE
16MB	(2) 4M x 9	(2) 4M x 9	NONE	NONE

CONNECTIONS
Purpose	Location	Purpose	Location
PS/2 mouse port	CN1	Reset switch	JP2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	JP1	N/A
»	CMOS memory normal operation	JP3	pins 2 & 3 closed
	CMOS memory clear	JP3	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(2) 256K x 9	(2) 256K x 9	NONE	NONE
1.5MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	NONE
2MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	NONE	NONE	NONE
3MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	NONE
4MB	(2) 1M x 9	(2) 1M x 9	NONE	NONE
5MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	(2) 1M x 9
6MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	NONE

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
8MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE	NONE	NONE
10MB	(2) 1M x 9	NONE	(2) 4M x 9	NONE
12MB	(2) 1M x 9	(2) 1M x 9	(2) 4M x 9	NONE
16MB	(2) 4M x 9	(2) 4M x 9	NONE	NONE

CONNECTIONS
Purpose	Location
PS/2 mouse port	CN1

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	JP1	N/A
»	Factory configured - do not alter	T1	N/A
»	CMOS memory normal operation	W1	pins 2 & 3 closed
	CMOS memory clear	W1	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	(4) 1M x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CONNECTIONS
Purpose	Location
PS/2 mouse port	CN1

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JP1	Open
	CMOS memory clear	JP1	Closed
»	Factory configured - do not alter	JP2	N/A
»	Factory configured - do not alter	T1	N/A

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	(4) 1M x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

NPU CONFIGURATION
Type	JP3
ODP486SX-25	pins 2 & 3, 6 & 7 closed
80487SX	pins 2 & 3, 6 & 7 closed

CONNECTIONS
Purpose	Location
PS/2 mouse port	CN1

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JP1	Open
	CMOS memory clear	JP1	Closed
»	Factory configured - do not alter	JP2	N/A
»	Factory configured - do not alter	T1	N/A

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	(4) 1M x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CPU TYPE CONFIGURATION
Type	JP3
ODP486SX	pins 2 & 3, 6 & 7 closed
ODPR486	pins 1 & 2, 5 & 6 closed
80486DX	pins 1 & 2, 5 & 6 closed
80486DX2	pins 1 & 2, 5 & 6 closed

CONNECTIONS
Purpose	Location
PS/2 mouse port	CN1

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	J1	N/A
»	Factory configured - do not alter	J2	N/A
»	Factory configured - do not alter	J3	N/A
»	Factory configured - do not alter	J4	N/A
»	Factory configured - do not alter	J5	N/A
»	CMOS memory normal operation	J13	Open
	CMOS memory clear	J13	Closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	(4) 1M x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9