US486 P3 Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	UMC
Maximum Onboard Memory	128MB
Cache	32/64/128/256KB
BIOS	AMI
Dimensions	250mm x 220mm
I/O Options	32-bit VESA local bus slots (3)
NPU Options	None

CONNECTIONS
Function	Label	Function	Label
External battery	J2	Speaker	JP12
Reset switch	JP9	Power LED & keylock	JP13
Turbo switch	JP10	32-bit VESA local bus slots	SL1 - SL3
Turbo LED	JP11

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	Jumper information unavailable	JP4	N/A

DRAM
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) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	None
17MB	(4) 4M x 9	(4) 256K 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
128MB	(4) 16M x 9	(4) 16M x 9

CACHE SIZE
Size	Bank 0	Bank 1	TAG
32KB	(4) 8K x 8	None	(1) 8K x 8
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	None	(1) 8K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

CACHE JUMPER
Size	JP1	JP2	JP3	JP5
32KB	Open	Open	Open	Open
64KB	Closed	Open	Open	Open
128KB	Closed	Closed	Open	Pins 2 & 3 closed
256KB	Closed	Closed	Closed	Pins 1 & 2 closed

CPU TYPE
Setting	JP6	JP7	JP8	JP14
80486SX	2 & 3	Open	Open	1 & 2
80487SX	1 & 2, 3 & 4	1 & 2	Open	1 & 2
80486DX-25/33	1 & 2, 3 & 4	2 & 3	Open	1 & 2
80486DX-40/50	1 & 2, 3 & 4	2 & 3	Closed	2 & 3
80486DX2	1 & 2, 3 & 4	2 & 3	Open	1 & 2
Note: Pins designated should be in the closed position.

CPU SPEED
Setting	JP15	JP16	JP17
25MHz	Open	Open	Closed
33MHz	Closed	Open	Open
40MHz	Closed	Closed	Open
50iMHz	Open	Open	Closed
50MHz	Open	Closed	Open
66iMHz	Closed	Open	Open