Processor	80486SX/80486DX
Processor Speed	16/20/25/33/50MHz
Chip Set	UMC
Max. Onboard DRAM	32MB
SRAM Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit local bus card slots (2)
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & Keylock	J1	External battery	J17
Reset switch	J2	32-bit local bus slots	LB1 & LB2
Speaker	J3		LB2
Turbo LED	J5

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	External cache enabled	J4	pins 1 & 2 closed
	External cache disabled	J4	pins 2 & 3 closed
	CPU type select 80486DX	J8	pins 1 & 2 closed
	CPU type select 80486SX	J8	pins 2 & 3 closed
»	CPU speed select iOSC/1	J13	Open
	CPU speed select iOSC/2	J13	Closed
»	Monitor type select color	J16	Closed
	Monitor type select monochrome	J16	Open
»	CMOS memory normal operation	J18	Closed
	CMOS memory clear	J18	Open
Note:If J13 is closed, you must set the Bus speed select to CLKIN/5 in the advanced chipset setup.

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
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	(3) 16K x 4
128KB	(4) 32K x 8	NONE	(3) 16K x 4
256KB	(4) 32K x 8	(4) 32K x 8	(3) 16K x 4

CACHE CONFIGURATION
Size	J10	J11	J12
64KB	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
128KB	pins 1 & 2 closed	pins 2 & 3 closed	pins 1 & 2 closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed