EXP8C49 Motherboard Settings and Configuration

Device Type	Mainboard
Processor	CX486DX2/CX486DX4/CX 5X86
Processor Speed	40/50(internal)/66(internal)/75(internal)100(internal)MHz
Chip Set	ALI
Video Chip Set	None
Maximum Onboard Memory	64MB
Maximum Video Memory	None
Cache	128/256/512KB
BIOS	AMI
Dimensions	220mm x 220mm
I/O Options	32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2)

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 2	CN1	IDE interface LED	J2
Serial port 1	CN2	Reset switch	J3
Floppy drive interface	CN3	Turbo switch	J4
Parallel port	CN4	Turbo LED	J5
IDE interface 1	CN5	Power LED & keylock	J6
IDE interface 2	CN6	Speaker	J7
PS/2 mouse port	CN7	Green PC connector	JP15
External battery	J1	32-bit PCI slots	PC1 – PC3

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Battery type select external	J1	Closed
	CMOS memory clear	J1	Pins 1 & 2 closed
»	Factory configured - do not alter	JP4	Unidentified
	Parallel port IRQ select IRQ7	JP9	Pins 2 & 3 closed
	Parallel port IRQ select IRQ5	JP9	Pins 1 & 2 closed
»	Factory configured - do not alter	JP14	Unidentified
»	Factory configured - do not alter	JP18	Unidentified
	Flash BIOS voltage select 12v	JP21	Pins 2 & 3 closed
	Flash BIOS voltage select 5v	JP21	Pins 1 & 2 closed
»	Factory configured - do not alter	JP24	Unidentified
»	Factory configured - do not alter	JP41	Unidentified

SIMM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
4MB	(1) 1M x 36	None	None	None
8MB	(1) 2M x 36	None	None	None
8MB	(1) 1M x 36	(1) 1M x 36	None	None
12MB	(1) 2M x 36	(1) 1M 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
16MB	(1) 4M x 36	None	None	None
16MB	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36	None
16MB	(1) 2M x 36	(1) 2M x 36	None	None

SIMM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
20MB	(1) 4M x 36	(1) 1M x 36	None	None
20MB	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
20MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	None
24MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	None
24MB	(1) 4M x 36	(1) 2M x 36	None	None
24MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	None
28MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
32MB	(1) 8M x 36	None	None	None
32MB	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36	None
32MB	(1) 4M x 36	(1) 4M x 36	None	None
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
36MB	(1) 8M x 36	(1) 1M x 36	None	None
40MB	(1) 8M x 36	(1) 1M x 36	(1) 1M x 36	None
40MB	(1) 8M x 36	(1) 2M x 36	None	None
40MB	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
48MB	(1) 8M x 36	(1) 2M x 36	(1) 2M x 36	None
48MB	(1) 8M x 36	(1) 4M x 36	None	None
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	None
56MB	(1) 8M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
56MB	(1) 2M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
64MB	(1) 8M x 36	(1) 4M x 36	(1) 4M x 36	None
64MB	(1) 8M x 36	(1) 8M x 36	None	None
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36

CACHE CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	TAG
128KB (A)	None	None	(4) 32K x 8	(1) 8K x 8
128KB (B)	(1) 32K x 32	None	None	(1) 8K x 8
256KB (A)	None	None	(4) 64K x 8	(1) 16K/32K x 8
256KB (B)	(1) 32K x 32	None	(4) 32K x 8	(1) 16K/32K x 8
256KB (C)	(1) 32K x 32	(1) 32K x 32	None	(1) 16K/32K x 8
512KB	None	None	(4) 128K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP17	JP20	JP37	JP42
128KB (A)	Open	Open	Pins 1 & 2 closed	Pins 1 & 2 closed
128KB (B)	Open	Open	Pins 1 & 2 closed	Pins 1 & 2 closed
256KB (A)	Open	Closed	Pins 1 & 2 closed	Pins 2 & 3 closed
256KB (B)	Open	Closed	Pins 2 & 3 closed	Pins 2 & 3 closed
256KB (C)	Open	Closed	Pins 2 & 3 closed	Pins 2 & 3 closed
512KB	Closed	Closed	Pins 1 & 2 closed	Pins 2 & 3 closed

CPU SPEED SELECTION
Speed	JP11	JP12	JP13	JP16
40MHz	Open	Closed	Pins 2 & 3 closed	Open
40MHz	Open	Closed	Pins 1 & 2 closed	Closed
50iMHz	Open	Open	Pins 2 & 3 closed	Open
66iMHz	Closed	Closed	Pins 2 & 3 closed	Open
75iMHz	Open	Open	Pins 2 & 3 closed	Open
100iMHz	Closed	Closed	Pins 2 & 3 closed	Open
Note: Either setting may be used for 40MHz.

CPU TYPE SELECTION
Type	JP23	JP32	JP35
CX486DX2	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
CX486DX4	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
CX 5X86	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 4 closed

CPU VOLTAGE SELECTION
Voltage		JP29
	3.3v	Pins 1 & 2 closed
»	3.45v	Pins 3 & 4 closed
	3.6v	Pins 5 & 6 closed

DMA CHANNEL SELECTION
Channel	JP5	JP6
1	Pins 1 & 2 closed	Pins 1 & 2 closed
3	Pins 2 & 3 closed	Pins 2 & 3 closed

INTERNAL KEYBOARD SELECTION
Setting		JP19	JP39	JP40
»	Enabled	Open	Closed	Closed
	Disabled	Closed	Open	Open