486M Motherboard Settings and Configuration

Processor	80486SX/80486DX
Processor Speed	33/50MHz
Chip Set	OPTI
Max. Onboard DRAM	32MB
Cache	64/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J9	Turbo switch	J12
Power LED & keylock	J10	Turbo LED	J13
Speaker	J11	Reset switch	J14

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	J1	Closed
	Monitor type select monochrome	J1	Open
»	CMOS memory normal operation	J8	pins 2 & 3 closed
	CMOS memory clear	J8	pins 1 & 2 closed
»	CPU speed select 33MHz	J16	pins 1 & 2 closed
	CPU speed select 50MHz	J16	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
5MB	(4) 256K x 9	(4) 1M x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	TAG
64KB	(8) 8K x 8	(3) 4K x 4
256KB	(8) 32K x 8	(3) 16K x 4

CACHE CONFIGURATION
Size	JP5	JP6	JP7
64KB	Open	Open	Open
256KB	Closed	Closed	Closed

CPU TYPE CONFIGURATION
Type	J2	J3	J4
80486SX	Open	Open	pins 2 & 3 closed
80486DX	Closed	pins 2 & 3 closed	pins 1 & 2 closed