GX 486I Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX
Processor Speed	20/33/50MHz
Chip Set	UMC
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI/Award
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Turbo switch	J10
Power LED & keylock	J8	Reset switch	W17
Speaker	J9	Turbo LED	W18

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select monochrome	W1	Open
	Monitor type select color	W1	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
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

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

CACHE JUMPER CONFIGURATION
Size	W3	W4	W6	W7	W8
64KB	1 & 2	1 & 2	1 & 2	1 & 2	3 & 4
128KB	1 & 2	1 & 2	3 & 4	3 & 4	3 & 4
256KB	3 & 4	3 & 4	3 & 4	1 & 2	3 & 4
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	W2	W14	W15	W16
80486SX	Closed	Open	pins 2 & 3 closed	Open
80487SX	Open	pins 2 & 3 closed	pins 1 & 2 closed	Open
80486DX	Open	pins 1 & 2 closed	pins 1 & 2 closed	Closed

CPU SPEED CONFIGURATION
Speed	JP4	R1	R2	R3
20MHz	pins 2 & 3 closed	Open	Open	Closed
25MHz	pins 1 & 2 closed	Open	Open	Open
33MHz	pins 1 & 2 closed	Closed	Open	Open
40MHz	pins 1 & 2 closed	Open	Closed	Open
50MHz	pins 1 & 2 closed	Closed	Closed	Open