Processor	80486SX/80487SX/80486SX2/80486DX ODP486/80486DX2/Pentium Overdrive
Processor Speed	20/25/33/40/50(internal)/66(internal)MHz
Chip Set	SiS
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (3)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP1	Reset switch	JP17
Peripheral power save	JP2 & JP3	Turbo LED	JP18
Speaker	JP15	Turbo switch	JP19
Power LED & keylock	JP16	32-bit VESA Local bus slots	SL1, SL2,SL3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS normal operation	JP21	pins 2 & 3 closed
	CMOS memory clear	JP21	pins 1 & 2 closed

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
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	NONE	(1) 8K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP11	JP12
64KB	Open	Open
128KB	pins 1 & 2 closed	Closed
256KB	pins 2 & 3 closed	Closed

CPU TYPE CONFIGURATION
CPU Type	JP7	JP8
80486SX	pins 2 & 3 closed	Open
80487SX	pins 1 & 2, 3 & 4 closed	pins 2 & 3 closed
80486SX2	pins 1 & 2, 3 & 4 closed	pins 2 & 3 closed
80486DX	pins 1 & 2, 3 & 4 closed	pins 1 & 2 closed
80486DX2	pins 1 & 2, 3 & 4 closed	pins 1 & 2 closed
ODP486 (168-pin)	pins 1 & 2, 3 & 4 closed	pins 1 & 2 closed
ODP486 (169-pin)	pins 1 & 2, 3 & 4 closed	pins 2 & 3 closed
Pentium Overdrive	pins 1 & 2, 3 & 4 closed	pins 2 & 3 closed

CPU CLOCK CONFIGURATION
CPU Clock	JP4	JP5	JP6
20MHz	Closed	Closed	Open
25MHz	Closed	Open	Closed
33MHz	Open	Closed	Closed
40MHz	Closed	Open	Open
50MHz	Open	Closed	Open

VESA WAIT STATE/BUS SPEED CONFIGURATION
CPU speed	Wait states	JP13	JP14
<= 33MHz	0 wait states	Open	Open
> 33MHz	1 wait state	Closed	Closed

MISCELLANEOUS TECHNICAL NOTE

Note: JP2 & JP3 are used for an optional peripheral card timed power shut-down that is set up in CMOS.