Processor	80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed	16/20/25/33/50(internal)/50/66(internal)MHz
Chip Set	Symphony
Max. Onboard DRAM	64MB
Cache	64/256/1024KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	J1	Turbo LED	J4
Power LED & keylock	J2	Turbo switch	J5
Reset	J3	32-bit VESA local bus slots	S1 & S2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	VESA I/O wait states select zero	JP5	Open
	VESA I/O wait states select one	JP5	Open
»	Factory configured - do not alter	JP6	Closed
»	VESA timing select T3 speed 16 - 33MHz)	JP7	Closed
	VESA timing select T3 (speed 50MHz)	JP7	Open
»	I/O wait states select zero	JP10	Closed
	I/O wait states select one	JP10	Open
»	Phase select X2 1	JP11	pins 2 & 3 closed
	Phase select X1 1	JP11	pins 1 & 2 closed
»	Phase select X2 1	JP12	pins 2 & 3 closed
	Phase select X1 1	JP12	pins 1 & 2 closed
»	Phase select X2 1	JP18	pins 2 & 3 closed
	Phase select X1 1	JP18	pins 1 & 2 closed
»	Phase select X2 1	JP19	pins 2 & 3 closed
	Phase select X1 1	JP19	pins 1 & 2 closed
»	Factory configured - do not alter	JP13	Closed
»	Factory configured - do not alter	JP14	Closed
Note: 1 Phase X1 is only used when an 80486DX2-50 CPU is installed.

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) 1M x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
17MB	(4) 256K x 9	(4) 4M x 9
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9
64MB	(4) 16M x 9	NONE

CACHE CONFIGURATION
Size	Bank 0
64KB	(8) 8K x 8
256KB	(8) 32K x 8
1MB	(8) 128K x 8

CACHE JUMPER CONFIGURATION
Size	JP20	JP21	JP27	JP28	JP29
64KB	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
256KB	1 & 2	2 & 3	2 & 3	1 & 2	2 & 3
1MB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP15	JP16	JP17
80486SX	Closed	pins 1 & 2 closed	pins 2 & 3 closed
ODP486SX	Closed	pins 1 & 2 closed	pins 2 & 3 closed
80487SX	Open	Closed	Open
80486DX	Closed	pins 1 & 2 closed	pins 1 & 2 closed
80486DX2	Closed	pins 1 & 2 closed	pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed	JP3	JP4	JP8	JP9
16/20/25MHz	Open	Open	Open	Open
33MHz	pins 1 & 2 closed	Open	Open	Open
50MHz	pins 2 & 3 closed	Closed	Closed	Closed