RT486SX/DX Motherboard Settings and Configuration

Processor	80486SX/80486DX/80486DX2
Processor Speed	33/50/66(internal)MHz
Chip Set	OPTI
Video Chip Set	None
Maximum Onboard Memory	32MB
Maximum Video Memory	None
Cache	256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J22	Power LED & keylock	P6
Speaker	P5

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Battery type select internal	J22	Pins 2 & 3 closed
	Battery type select Vectra battery	J22	Open
	CMOS memory clear	J22	Pins 3 & 4 closed
»	Monitor type select color/EGA/VGA	JP12	Closed
	Monitor type select monochrome	JP12	Open

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

CACHE CONFIGURATION

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

CPU TYPE SELECTION
Type	J15	JP2	JP3	JP4	JP5
80486SX-33	Closed	Open	1 & 2	Open	2 & 3
80486DX-33	Closed	1 & 2	2 & 3	Closed	2 & 3
80486DX-50	Closed	1 & 2	2 & 3	Closed	1 & 2
80486DX2-66	Closed	1 & 2	2 & 3	Closed	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP6	JP7	JP8	JP9	JP10
80486SX-33	Closed	2 & 3	Open	Open	Closed
80486DX-33	Closed	2 & 3	Open	Closed	Closed
80486DX-50	Closed	2 & 3	Open	Closed	Closed
80486DX2-66	Closed	2 & 3	Open	Closed	Closed
Note: Pins designated should be in the closed position.