FEAT-3331 Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX
Processor Speed	16/20/25/33MHz
Chip Set	Symphony
Max. Onboard DRAM	32MB
Cache	64/256KB
BIOS	AMI/DTK
Dimensions	254mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J1	Turbo LED	J4
Turbo switch	J2	Power LED & keylock	J5
Speaker	J3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
	Turbo switch select normal speed	J2	pins 1 & 2 closed
	Turbo switch select turbo speed	J2	Open
	Turbo switch select through keyboard by pressing CTRL, ALT, -	J2	pins 2 & 3 closed
»	Cache wait state select 0 wait states	J9	Closed
	Cache wait state select 1 wait state	J9	Open
»	Monitor type select monochrome	J13	pins 1 & 2 closed
	Monitor type select color	J13	pins 2 & 3 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
5MB	(4) 256K x 9	(4) 1M x 9
5MB	(4) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
17MB	(4) 256K x 9	(4) 4M x 9
17MB	(4) 4M x 9	(4) 256K x 9
20MB	(4) 1M x 9	(4) 4M x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

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

CACHE JUMPER CONFIGURATION
Size	J6	J7	J8
64KB	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type	J10	J11	J12
80486SX	Open	pins 2 & 3 closed	Open
80487SX	Closed	pins 1 & 2 closed	pins 2 & 3 closed
80486DX	Closed	pins 1 & 2 closed	pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed	J14
16MHz	pins 2 & 3 closed
20MHz	pins 2 & 3 closed
25MHz	pins 2 & 3 closed
33MHz	pins 1 & 2 closed