SYSTEM V486/XX REV. 1 Motherboard Settings and Configuration

Processor	80486SX/80486DX/80486DX2/Overdrive
Processor Speed	25/33/50(internal)/66(internal)MHz
Chip Set	Opti
Max. Onboard DRAM	32MB
Cache	64/256KB
BIOS	AMI
Dimensions	330mm x 218mm
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo LED	J9	Speaker	J21
External battery	J18	Power LED and keylock	J22
Turbo Switch	J20

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Battery type select - internal	W1	Closed
	Battery type select - external	W1	Open
»	CMOS memory normal operation	W2	pins 1 & 2 closed
	CMOS memory clear	W2	pins 2 & 3 closed
»	Factory configured - do not alter	W3	pins 2 & 3 closed
»	Factory configured - do not alter	W4	pins 2 & 3 closed
»	Monitor type select color	W12	pins 1 & 2 closed
	Monitor type select monochrome	W12	pins 2 & 3 closed
»	Factory configured - do not alter	W13	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) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0
64KB	(8) 16K x4
256KB	(8) 32K x 8

CACHE JUMPER CONFIGURATION
Size	W8	W9	W10
0KB	Open	Open	Open
64KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed
256KB	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed

CPU TYPE SELECT
CPU type	W5	W6	W7
486SX	pins 2 & 3 closed	pins 2 & 3 closed	Open
487SX	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
486DX	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
486DX2	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
Overdrive	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed