486SX-25 Motherboard Settings and Configuration

Processor	80486SX
Processor Speed	25MHz
Chip Set	UMC
Max. Onboard DRAM	32MB
Cache	None
BIOS	Phoenix
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J3	Turbo LED	J11
Reset switch	J9	Speaker	J12
Turbo switch	J10	Power LED & keylock	J13

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	J4	pins 2 & 3 closed
	Monitor type select monochrome	J4	pins 1 & 2 closed
»	Factory configured - do not alter	J8	N/A

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) 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

CPU TYPE CONFIGURATION
Type	J5	J6	J7
80486SX	pins 2 & 3 closed	pins 2 & 3 closed	Open
80487SX	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
80486DX	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed