486S Motherboard Settings and Configuration

Processor	80486SX
Processor Speed	25MHz
Chip Set	OPTI
Max. Onboard DRAM	8MB
Cache	None
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-Bit external DRAM/SRAM card slot
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Reset switch 2	J12
Power LED & keylock	J10	Reset switch 1	J13
Speaker	J11	32-Bit external DRAM/SRAM card	S1

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	J2	pins 1 & 2 closed
	CMOS memory clear	J2	pins 2 & 3 closed
»	Monitor type select color	J3	Closed
	Monitor type select monochrome	J3	Open
»	Reset select J13 (Reset 1)	J5	pins 1 & 2 closed
	Reset select J12 (Reset 2)	J5	pins 2 & 3 closed
»	Factory configured - do not alter	J6	pins 1 & 2 closed
Note:Consult documentation provided with memory card for configurations.

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

CACHE CONFIGURATION
Setting	J8	J9
Not installed	Closed	Closed
Installed	Open	Open