386DX/20 & 386DX/25 Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	20/25MHz
Chip Set	Unidentified
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	80287/80387/3167

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo LED	J1	External battery	J13
Power LED & keylock	J2	Reset switch	J15
Speaker	J3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	J5	pins 2 & 3 closed
»	Factory configured - do not alter	J6	pins 1 & 2 closed
»	Factory configured - do not alter	J12	N/A
»	CMOS memory normal operation	J14	pins 1 & 2 closed
	CMOS memory clear	J14	pins 2 & 3 closed
»	Reset switch active at all times	J16	pins 2 & 3 closed
	Reset switch active only when keyboard is locked	J16	pins 1 & 2 closed
»	Monitor type select color	J17	pins 2 & 3 closed
	Monitor type select monochrome	J17	pins 1 & 2 closed

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
4MB	(2) 1M x 9	(2) 1M x 9	NONE	NONE
8MB	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9	(2) 1M x 9
16MB	(2) 4M x 9	(2) 4M x 9	NONE	NONE

NPU CONFIGURATION
Type	J4	J7	J8	J9	J10	J11
80287 <10MHz	2 & 3	2 & 3	2 & 3	2 & 3	1 & 2	2 & 3
80287 10MHz	2 & 3	2 & 3	1 & 2	1 & 2	1 & 2	2 & 3
80387	2 & 3	1 & 2	1 & 2	1 & 2	2 & 3	1 & 2
3167	1 & 2	2 & 3	1 & 2	1 & 2	1 & 2	2 & 3
Note: Pins designated should be in the closed position.