Processor	80386SX
Processor Speed	16/20MHz
Chip Set	OPTI
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	220mm x 220mm
I/O Options	None
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo switch	J1	Speaker	J4
Turbo LED	J2	Power LED & keylock	J5
Reset switch	J3	External battery	JP2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Turbo mode enabled	J1	Open
	Normal mode enabled CLK2/6 OR CLK2/4	J1	Closed
»	Monitor type select monochrome	JP1	Open
	Monitor type select color	JP1	Closed
»	CMOS memory normal operation	JP2	pins 2 & 3 closed
	CMOS memory clear	JP2	pins 3 & 4 closed
»	NPU asynchronous with CPU	JP3	Closed
	NPU synchronous with CPU	JP3	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(2) 256K x 9	(2) 256K x 9	NONE	NONE
2MB	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	NONE	NONE	NONE
3MB	(2) 256K x 9	(2) 256K x 9	(2) 1M x 9	NONE
4MB	(2) 1M x 9	(2) 1M x 9	NONE	NONE
6MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	NONE
9MB	(2) 256K x 9	(2) 256K x 9	(2) 4M x 9	NONE
10MB	(2) 1M x 9	(2) 4M x 9	NONE	NONE
12MB	(2) 1M x 9	(2) 1M x 9	(2) 4M x 9	NONE
16MB	(2) 4M x 9	(2) 4M x 9	NONE	NONE

DRAM CONFIGURATION
Size	Bank 0	Parity 0	Bank 1	Parity 1	Bank 2	Parity 2	Bank 3	Parity 3
256KB
256KB
512KB
512KB
576KB
576KB
640KB
640KB
Note:When using 44256 or 4464 chips, insert the chips into the dual-size sockets.

CACHE CONFIGURATION
Size	Max Cachable	Bank 0	Bank 1	TAG
64KB	8MB	(4) 8K x 8	(4) 8K x 8	(2) 16K x 4
128KB	16MB	(4) 32K x 8	NONE	(2) 16K x 4
256KB	32MB	(4) 32K x 8	(4) 32K x 8	(2) 16K x 4

CACHE JUMPER CONFIGURATION
Size	W3	W4	W5	W6
64KB	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
128KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed	pins 1 & 2 closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed

VESA CPU TYPE (ID0 & ID1) CONFIGURATION
CPU Type	JP1 (ID0)	JP2 (ID1)
80386	pins 2 & 3 closed	pins 1 & 2 closed
80486	pins 1 & 2 closed	pins 2 & 3 closed

VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION
CPU speed	Wait states	JP4 (ID3)	JP5 (ID2)
< 33MHz	0 wait states	pins 1 & 2 closed	pins 1 & 2 closed
> 33MHz	1 wait state	pins 2 & 3 closed	pins 2 & 3 closed

VESA ID4 CONFIGURATION
Setting	JP6 (ID4)
Reserved for future use	pins 2 & 3 closed

MISCELLANEOUS TECHNICAL NOTE

Note:Pins designated should be in the closed position.