386SX SYSTEM Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	16/25MHz
Chip Set	Headland
Video Chip Set	Trident
Maximum Onboard Memory	6MB
Maximum Video Memory	1MB
Cache	None
BIOS	Phoenix
Dimensions	396mm x 368mm
I/O Options	Floppy drive interface, game port, IDE interface, parallel port, serial ports (2), VGA port, riser slot, modem/fax interface
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Game port	CN1	Modem/fax interface	J25
VGA port	CN2	IDE interface	J27
Parallel port	CN3	IDE interface LED	J28
Serial port 2	CN4	Floppy drive interface LED	J29
Serial port 1	CN5	Power LED	J30
Chassis fan power	J14	Floppy drive interface	J31
Reset switch	J17	Riser slot	SL1
Speaker	J21

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Game port enabled	J6	Pins 1 & 2 closed
	Game port disabled	J6	Pins 2 & 3 closed
	Serial port 2 enabled	J8	Pins 1 & 2 closed
	Serial port 2 disabled	J8	Pins 2 & 3 closed
	Parallel port enabled	J9	Pins 1 & 2 closed
	Parallel port disabled	J9	Pins 2 & 3 closed
	Serial port 2 address select 2F8	J10	Pins 1 & 2 closed
	Serial port 2 address select 2E8	J10	Pins 2 & 3 closed
	Parallel port address select 378	J11	Pins 1 & 2 closed
	Parallel port address select 278	J11	Pins 2 & 3 closed
	Serial port 1 enabled	J12	Pins 1 & 2 closed
	Serial port 1 disabled	J12	Pins 2 & 3 closed
	Serial port 1 address select 3F8	J13	Pins 1 & 2 closed
	Serial port 1 address select 3E8	J13	Pins 2 & 3 closed
	Monitor type select color	J15	Pins 1 & 2 closed
	Monitor type select monochrome	J15	Pins 2 & 3 closed
	Video mode select interlaced	J18	Closed
	Video mode select non interlaced	J18	Open
	NPU synchronous with CPU	J20	Open
	NPU asynchronous with CPU	J20	Closed
	IDE interface enabled	J23	Pins 1 & 2 closed
	IDE interface disabled	J23	Pins 2 & 3 closed
	Floppy drive interface enabled	J24	Pins 1 & 2 closed
	Floppy drive interface disabled	J24	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	512KB	512KB	None	None
1.5MB	512KB	512KB	(2) 256K x 9	None
2MB	512KB	512KB	(2) 256K x 9	(2) 256K x 9
3MB	512KB	512KB	(2) 1M x 9	None
5MB	512KB	512KB	(2) 1M x 9	(2) 1M x 9
3MB	1MB	None	(2) 256K x 9	(2) 256K x 9
4MB	1MB	None	(2) 1M x 9	None
6MB	1MB	None	(2) 1M x 9	(2) 1M x 9
Note: Bank 0 or banks 0 & 1 are factory installed and is not configurable.

VIDEO MEMORY CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
256KB	(2) 44256	None	None	None
512KB	(2) 44256	(2) 44256	None	None
1MB	(2) 44256	(2) 44256	(2) 44256	(2) 44256