Processor	80486SX/80486DX/80486DX2
Processor Speed	25/33/50(internal)/50/66(internal)
Chip Set	OPTI
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J6	Turbo switch	JJ23
Power LED & keylock	J20	Speaker	J24
Reset switch	J22	32-bit VESA Local bus slot	S1
Turbo LED	J23	32-bit VESA Local bus slot	S2

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	CMOS memory normal operation	J1	pins 2 & 3 closed
	CMOS memory clear	J1	pins 1 & 2 closed
»	Monitor type select color	J3	Closed
	Monitor type select monochrome	J3	Open
	CPU type select PGA	J29	Closed
	CPU type select PQFP	J29	Open

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) 256K x 9	(4) 1M x 9
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

CPU TYPE CONFIGURATION
Type	J11	J12	J13
80486SX	pins 1 & 2 closed	Open	pins 2 & 3 closed
80486DX	pins 2 & 3 closed	Closed	pins 1 & 2 closed
80486DX2	pins 2 & 3 closed	Closed	pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed	Wait states	J15	J16	J17	J25	J28
25MHz	0	Closed	Open	pins 1 & 2	Open	Open
33MHz	0	Open	Closed	pins 1 & 2	Open	Open
50i Mhz	0	Closed	Open	pins 1 & 2	Open	Open
50MHz	1	Closed	Open	pins 2 & 3	Closed	Closed
66i MHz	0	Open	Closed	pins 1 & 2	Open	Open

CACHE CONFIGURATION
Size	Max Cachable	Bank 0	Bank 1	TAG (U25)	TAG (U26)
64KB	8MB	(4) 8K x 8	(4) 8K x 8	NONE	(1) 8K x 8
128KB	16MB	(4) 32K x 8	NONE	NONE	(1) 8K x 8
256KB	32MB	(4) 32K x 8	(4) 32K x 8	(1) 8K x 8	(1) 8K x 8

CACHE JUMPER CONFIGURATION
Size	J8	J9	J10	J14
64KB	pins 2 & 3 closed	Open	pins 1 & 2 closed	Open
128KB	pins 1 & 2 closed	Closed	pins 2 & 3 closed	Closed
256KB	pins 2 & 3 closed	Closed	pins 1 & 2 closed	Closed