RT486SX/DX (VLB) Motherboard Settings and Configuration

Processor	80486SX/80486DX/80486DX2
Processor Speed	33/50(internal)/50/66(internal)MHz
Chip Set	OPTI
Video Chip Set	None
Maximum Onboard Memory	64MB
Maximum Video Memory	None
Cache	256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J6	Chassis fan power	P7
Speaker	P5	32-bit VESA local bus slots	SL1 & SL2
Power LED & keylock	P6

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Battery type select internal	J6	Pins 2 & 3 closed
	Battery type select Vectra battery	J6	Open
	CMOS memory clear	J6	Pins 3 & 4 closed
»	Factory configured - do not alter	JP1	Open
»	Factory configured - do not alter	JP12	Open
»	Factory configured - do not alter	JP13	Open
»	Monitor type select color/EGA/VGA	JP21	Closed
	Monitor type select monochrome	JP21	Open
»	Factory configured - do not alter	JP23	Open
»	Standard VESA card in SL1	JP24	Pins 2 & 3 closed
»	Battery type select Ni Cad	JP26	Pins 2 & 3 closed
»	Factory configured - do not alter	JP27	Pins 1 & 2 closed
»	Factory configured - do not alter	JP28	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) 1M x 9	(4) 4M x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9
64MB	(4) 16M x 9	None

CACHE CONFIGURATION

Note: Board is factory installed with 256KB cache and is not configurable. The location of the cache is unidentified.

CACHE JUMPER CONFIGURATION
Size	JP10	JP11	JP16	JP17
256KB	Pins 2 & 3 closed	Pins 2 & 3 closed	Closed	Closed

CPU SPEED SELECTION
Speed	JP6	JP7	JP8	JP9	JP22
33MHz	Open	Open	Closed	1 & 2	Open
50iMHz	Open	Open	Open	1 & 2	Closed
50MHz	Open	Closed	Open	1 & 2	Open
66iMHz	Open	Open	Closed	1 & 2	Open
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION
Type	JP2	JP14	JP15	JP18	JP19	JP20	JP25
80486SX	Open	Closed	Closed	Open	2 & 3	1 & 2	2 & 3
80486DX	Closed	Closed	Closed	Closed	1 & 2	1 & 2	2 & 3
80486DX2	Closed	Closed	Closed	Closed	1 & 2	1 & 2	2 & 3
Note: Pins designated should be in the closed position.