XEN-PC/PCM Motherboard Settings and Configuration

Processor	CX486M6/CX486CXM6 &C6/80486SX/CX486M7/80486DX/80486DX2/Pentium Overdrive/Pentium
Processor Speed	25/33/40/50(internal)/60/66(internal)/66MHz
Chip Set	ALI/Intel/VLSI
Max. Onboard DRAM	128MB
Cache	64/128/256/512KB
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	32-bit PCI local bus slot (on riser card), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
VGA port	CN1	PS/2 mouse port	CN5
Parallel port	CN2	Floppy drive interface	CN6
Serial port 1	CN3	IDE interface	CN7
Serial port 2	CN4	Riser Card	SL1

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	J10	Open
»	BIOS type select original	JP1	Open
	BIOS type select OEM	JP1	Closed
»	Security enabled	JP2	pins 1 & 2 closed
	Security disabled	JP2	pins 2 & 3 closed
»	Factory configured - do not alter	JP3	Open
»	BIOS type select Flash	JP4	pins 1 & 2 closed
	BIOS type select EPROM	JP4	pins 2 & 3 closed
»	Floppy drive select normal	JP5	pins 1 & 2 closed
	Floppy drive select 3 mode	JP5	pins 2 & 3 closed
»	IDE I/O address select 03xH	JP6	pins 1 & 2 closed
	IDE I/O address select 0BxH	JP6	pins 2 & 3 closed
»	On board video disabled	JP14	Open
	On board video enabled	JP14	Closed
»	IDE interface enabled	JP16	Open
	IDE interface disabled	JP16	Closed
»	Factory configured - do not alter	JP19	Open
»	Key select locked	JP22	Open
	Key select unlocked	JP22	Closed
»	On board memory enabled	JP28	pins 1 & 2 closed
	On board memory disabled	JP28	pins 2 & 3 closed
Note: The location of JP2 is unknown.

DRAM CONFIGURATION (NON PENTIUM)
Size	Bank 1	Bank 2
4MB	NONE	NONE
8MB	NONE	(1) 1M x 36
8MB	(1) 1M x 36	NONE
12MB	NONE	(1) 2M x 36
12MB	(1) 1M x 36	(1) 1M x 36
16MB	(1) 1M x 36	(1) 2M x 36
20MB	NONE	(1) 4M x 36
20MB	(1) 4M x 36	NONE
24MB	(1) 1M x 36	(1) 4M x 36
24MB	(1) 4M x 36	(1) 1M x 36
28MB	(1) 4M x 36	(1) 2M x 36
36MB	(1) 4M x 36	(1) 4M x 36
Note: Bank 0 contains 4MB & is factory installed.

DRAM CONFIGURATION (PENTIUM)
Size	Bank 1	Bank 2
8MB	NONE	NONE
16MB	(1) 1M x 36	(1) 1M x 36
16MB	(1) 2M x 36	NONE
20MB	(1) 1M x 36	(1) 2M x 36
24MB	(1) 2M x 36	(1) 2M x 36
24MB	(1) 4M x 36	NONE
28MB	(1) 1M x 36	(1) 4M x 36
32MB	(1) 2M x 36	(1) 4M x 36
40MB	(1) 4M x 36	(1) 4M x 36
40MB	(1) 8M x 36	NONE
44MB	(1) 1M x 36	(1) 8M x 36
48MB	(1) 2M x 36	(1) 8M x 36
56MB	(1) 4M x 36	(1) 8M x 36
72MB	(1) 8M x 36	(1) 8M x 36
72MB	(1) 16M x 36	NONE
76MB	(1) 1M x 36	(1) 16M x 36
80MB	(1) 2M x 36	(1) 16M x 36
88MB	(1) 4M x 36	(1) 16M x 36
104MB	(1) 8M x 36	(1) 16M x 36
128MB	(1) 16M x 36	(1) 16M x 36
Note: Bank 0 contains 8MB & is factory installed. When 128MB is installed, the on board memory is disabled.

CACHE CONFIGURATION

Note: The location and bank configuration of cache is unknown.

CACHE JUMPER CONFIGURATION
Size	JP24	JP25	JP26
64KB	Open	Open	pins 1 & 2 closed
128KB	Open	Closed	pins 2 & 3 closed
256KB	Closed	Closed	pins 1 & 2 closed
Note: The jumper settings for 512KB cache is unknown.

CPU TYPE CONFIGURATION
Type	JP11	JP12	JP13	JP15	JP18	JP20	JP27
CX486M6	2 & 3	1 & 2	2 & 3	2 & 3	2 & 3	1 & 2	Open
CX486M7	2 & 3	1 & 2	1 & 2	2 & 3	2 & 3	2 & 3	Open
CXM6 & C6	2 & 3	1 & 2	2 & 3	2 & 3	2 & 3	1 & 2	Open
80486	1 & 2	1 & 2	1 & 2	1 & 2	2 & 3	2 & 3	Open
P24T	1 & 2	2 & 3	1 & 2	2 & 3	1 & 2	2 & 3	Closed
Note: The jumper settings for the Pentium processor are unknown. Pins designated should be in the closed position. The location of JP18 is unknown.

CPU SPEED CONFIGURATION
Speed	JP7	JP8	JP9	JP10	JP17
25MHz	2 & 3	2 & 3	1 & 2	2 & 3	2 & 3
33MHz	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
40MHz	1 & 2	1 & 2	2 & 3	1 & 2	1 & 2
50iMHz	2 & 3	2 & 3	1 & 2	2 & 3	2 & 3
50MHz	2 & 3	2 & 3	1 & 2	1 & 2	1 & 2
66iMHz	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
Note: The jumper settings for the Pentium processor are unknown. Pins designated should be in the closed position.

MISCELLANEOUS TECHNICAL NOTE

Note:Not all options listed in this document are available on each motherboard.