OPTI 386-SX Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	20MHz
Chip Set	OPTI
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	249mm x 218mm
I/O Options	None
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP2	Reset	J3
Turbo switch	J1	Speaker	J4
Turbo LED	J2	Power & LED keylock	J5

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP1	Closed
	Monitor type select monochrome	JP1	Open
»	CMOS memory normal operation (internal battery)	JP2	pins 2 & 3 closed
»	CMOS memory normal operation (external battery)	JP2	pins 1 & 4 connected
	CMOS memory clear	JP2	pins 3 & 4 closed
»	NPU mode select asynchronous with CPU	JP3	Closed
	NPU mode select synchronous with CPU	JP3	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(2) 256K x 9	(2) 256K x 9	NONE	NONE
2MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	NONE	NONE	NONE
3MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	NONE
4MB	(2) 1M x 9	(2) 1M x 9	NONE	NONE
5MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	(2) 1M x 9
6MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	NONE
8MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9
9MB	(2) 256K x 9	(2) 256K x 9	(2) 4M x 9	NONE
10MB	(2) 1M x 9	(2) 4M x 9	NONE	NONE
12MB	(2) 1M x 9	(2) 1MB x 9	(2) 4M x 9	NONE
16MB	(2) 4M x 9	(2) 4MB x 9	NONE	NONE