486 VESA/486 ISA Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	UNI
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI/Award
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2)

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	JW1	Reset switch	JW5
Speaker	JW2	External battery	JP16
Turbo LED	JW3	32-bit VESA local bus slots	S1 & S2
Turbo switch	JW4

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	JP1	Closed
»	Factory configured - do not alter	JP2	Closed
»	Factory configured - do not alter	JP3	pins 1 & 2 closed
»	Factory configured - do not alter	JP9	Closed
»	Factory configured - do not alter	JP10	Closed
»	Monitor type select monochrome	JP11	pins 1 & 2 closed
	Monitor type select color	JP11	pins 2 & 3 closed
»	Factory configured - do not alter	JP12	Closed
»	Factory configured - do not alter	JP14	Closed
»	CMOS memory normal operation	JP15	pins 2 & 3 closed
	CMOS memory clear	JP15	pins 1 & 2 closed
»	Factory configured - do not alter	JP17	Closed
»	Factory configured - do not alter	JP18	Closed
»	Factory configured - do not alter	JP19	Closed
»	Factory configured - do not alter	JP20	Closed
»	Factory configured - do not alter	JP21	Closed
»	Factory configured - do not alter	JP22	Closed
»	Factory configured - do not alter	JP23	Closed
»	Factory configured - do not alter	JP24	Closed
»	Factory configured - do not alter	JPX4	Closed
»	Factory configured - do not alter	JPX5	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
32MB	(4) 4M x 9	(4) 4M x 9

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

CACHE JUMPER CONFIGURATION
Size	JPX10	JPX20	JPX30
64KB	Closed	Open	Open
128KB	Open	Closed	Open
256KB	Open	Open	Closed

CPU SPEED CONFIGURATION
Speed	JP4	JP28	JP29	JP31	JP32	JP33
25MHz	1 & 2	1 & 2	1 & 2	Closed	Open	Closed
33MHz	1 & 2	1 & 2	1 & 2	Closed	Closed	Open
40MHz	2 & 3	2 & 3	2 & 3	Open	Closed	Closed
50iMHz	1 & 2	1 & 2	1 & 2	Closed	Open	Closed
50MHz	2 & 3	2 & 3	2 & 3	Closed	Open	Closed
66iMHz	1 & 2	1 & 2	1 & 2	Closed	Closed	Open
NotePins designated should be in the closed position.

CPU TYPE CONFIGURATION
CPU Type	JP5-JP8, JP25	JPX1	JPX2	JPX3
80486SX	pins 1 & 2 closed	Open	Closed	Closed
80487SX	pins 1 & 2 closed	Open	Open	Closed
80486DX, DX2	pins 1 & 2 closed	Closed	Open	Open

VESA WAIT STATE/BUS SPEED CONFIGURATION
CPU speed	Wait States	JP26	JP27
< 33MHz	O wait states	pins 1 & 2 closed	pins 1 & 2 closed
> 33MHz	1 wait state	pins 2 & 3 closed	pins 2 & 3 closed