NORTHGATE ENERGY STAR LX400A/G REV. 3.1 Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	SIS
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	254mm x 220mm
I/O Options	32-bit VESA local bus slots (2), PS/2 mouse port, green PC connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo LED	J3	Flash LED	J10
Turbo switch	J4	PS/2 mouse port	J11
Speaker	J5	Green PC connector	J12
Reset switch	J6	Green PC connector (monitor)	J28
Power LED & keylock	J7	32-bit VESA local bus slots	SL1 & SL2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	JP1	Open
»	Monitor type select color	JP2	Closed
	Monitor type select monochrome	JP2	Open
»	On board mouse enabled	JP12	pins 1 & 2 closed
	On board mouse disabled	JP12	pins 2 & 3 closed
»	Factory configured - do not alter	JP13	pins 2 & 3 closed
»	Power good signal detect from power supply	JP14	pins 1 & 2 closed
	Power good signal detect from board	JP14	pins 2 & 3 closed
»	Factory configured - do not alter	JP21	Open
»	Factory configured - do not alter	JP22	Open
»	Factory configured - do not alter	JP23	Open
»	Factory configured - do not alter	JP100	Open

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	SR1	SR2	SR3	SR4	SR5
64KB	2 & 3	2 & 3	1 & 2	1 & 2	1 & 2
128KB	1 & 2	1 & 2	2 & 3	2 & 3	1 & 2
256KB	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP6	JP7	JP8
80486SX	Open	Open	pins 2 & 3 closed
80487SX	Closed	pins 2 & 3 closed	pins 1 & 2 closed
80486DX	Closed	pins 1 & 2 closed	pins 1 & 2 closed
80486DX2	Closed	pins 1 & 2 closed	pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed	JP10	JP11
25MHz	pins 2 & 3 closed	pins 2 & 3 closed
33MHz	pins 2 & 3 closed	pins 1 & 2 closed
40MHz	pins 1 & 2 closed	pins 2 & 3 closed
50iMHz	pins 2 & 3 closed	pins 2 & 3 closed
50MHz	pins 1 & 2 closed	pins 1 & 2 closed
66iMHz	pins 2 & 3 closed	pins 1 & 2 closed

VESA WAIT STATE CONFIGURATION
Wait states	JP24	JP26
0 wait states	pins 1 & 2 closed	pins 1 & 2 closed
1 wait state	pins 2 & 3 closed	pins 2 & 3 closed

BUS SPEED CONFIGURATION
CPU speed	JP25	JP27
<= 33MHz	pins 1 & 2 closed	pins 1 & 2 closed
> 33MHz	pins 2 & 3 closed	pins 2 & 3 closed