Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/50(internal)MHz
Chip Set	OPTI
Max. Onboard DRAM	64MB
Cache	64/256KB
BIOS	AMI
Dimensions	330mm x 218mm
NPU options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Serial port 1	J10
Unidentified	J2	Turbo LED	J23
Unidentified	J3	Reset switch	J24
IDE interface	J5	Power LED & keylock	J25
Floppy drive interface	J6	Speaker	J26
Parallel port	J8	VGA interface	J27
Serial port 2	J9

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	W1	pins 1 & 2 closed
	Monitor type select monochrome	W1	pins 2 & 3 closed
»	CMOS memory normal operation	W2	pins 1 & 2 closed
	CMOS memory clear	W2	pins 2 & 3 closed
»	Factory configured - do not alter	W3	pins 2 & 3 closed
»	Onboard VGA enabled	W10	pins 1 & 2 closed
	Onboard VGA disabled	W10	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
4MB	(1) 1M x 36	NONE	NONE	NONE
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	NONE
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 4M x 36	NONE	NONE	NONE
20MB	(1) 4M x 36	(1) 1M x 36	NONE	NONE
24MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	NONE
28MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE
36MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	NONE
40MB	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	NONE
52MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36

CACHE CONFIGURATION
Size	Bank 0
64KB	(8) 16K x 4
256KB	(8) 32K x 8

CACHE JUMPER CONFIGURATION
Size	W4	W5	W9
0KB	Open	Open	Open
64KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed
256KB	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed

CPU FREQUENCY SELECT
CPU type	W6	W7	W8
80486SX	pins 2 & 3 closed	pins 2 & 3 closed	Open
80487SX	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
80486DX	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
80486DX2	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed

VIDEO RAM CONFIGURATION
Size	Bank 0	Bank 1
512KB	(4) 256KB x 4	NONE
1MB	(4) 256KB x 4	(4) 256KB x 4
Note:Bank 0 is factory installed and is not configurable.

VIDEO RAM JUMPER CONFIGURATION
Size	SW1/6
512KB	On
1MB	Off

MONITOR REFRESH RATE (800 X 600)
Rate	SW1/1	SW1/2
56Hz	Off	Off
60Hz	Off	On
72Hz	On	Off
56Hz	On	On

MONITOR REFRESH RATE (1024 X 768)
Rate	SW1/3	SW1/4
Interlaced	Off	Off
60Hz (noninterlaced)	Off	On
70Hz (noninterlaced)	On	Off
72Hz (noninterlaced)	On	On

STANDARD VGA MODES
Mode	SW1/5
40Hz horizontal, 75/80Hz vertical	On
31.5Hz horizontal, 60/70Hz vertical	Off