486-25/33UNB AIO, 486DX2-50UNB AIO Motherboard Settings and Configuration

DIAMOND FLOWER, INC.

486-25/33UNB AIO, 486DX2-50UNB AIO

Processor	80486SX/80486DX/ODP486SX/80486DX2
Processor Speed	20/25/33/50(internal)MHz
Chip Set	UMC
Max. Onboard DRAM	16MB
Cache	None
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	Bus mouse port, floppy drive interface, IDE interface, parallel port, serial port (2), VGA port
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
IDE interface	CN1	Turbo switch	J3 & J8
Floppy drive interface	CN2	Reset switch	J4 & J9
VGA feature connector	CN3	IDE interface LED	J5
VGA port	CN4	Power LED & keylock	J6
Parallel port	CN5	Speaker	J7
Bus mouse port	CN6	External battery	J10
Serial port 1	CN7	Serial port 2	JP31
Alternate keyboard connector	J1	Riser card	S1
Turbo LED	J2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Battery select internal	J11	Pins 2 & 3 closed
	Battery select external	J11	Pins 1 & 2 closed
»	Speaker select internal	JP1	Closed
	Speaker select external	JP1	Open
»	Onboard VGA local bus enabled	JP2 JP3	Pins 2 & 3 closed Closed
»	Onboard VGA local bus disabled	JP2 JP3	Pins 1 & 2 closed Open
»	Factory configured - do not alter	JP4	Closed
»	Factory configured - do not alter	JP5	Pins 1 & 2 and 3 & 4 closed
»	Factory configured - do not alter	JP6	Open
»	Factory configured - do not alter	JP7	Open
»	BIOS type select 27C256 (32KB)	JP8	Pins 2 & 3 closed
	BIOS type select 27C512 (64KB)	JP8	Pins 1 & 2 closed
»	Factory configured - do not alter	JP10	Open
»	Monitor type select color	JP11	Closed
	Monitor type select monochrome	JP11	Open
»	VGA port (CN4) interrupt select IRQ2	JP12	Open
	VGA port (CN4) interrupt select none	JP12	Closed
»	Factory configured - do not alter	JP13	Open
»	Factory configured - do not alter	JP14	Closed
»	Floppy interface enabled	JP20	Pins 1 & 2 closed
	Floppy interface disabled	JP20	Pins 2 & 3 closed
»	Factory configured - do not alter	JP21	Pins 1 & 2 closed
»	IDE interface enabled	JP22	Pins 1 & 2 closed
	IDE interface disabled	JP22	Pins 2 & 3 closed

PARALLEL PORT 1 (CN5) CONFIGURATION
LPT	I/O Address	Interrupt	JP9	JP15	JP16
LPT 1	3BC-3BEh	IRQ7	Pins 1 & 2	Pins 2 & 3	Pins 1 & 2
LPT 2	378-37Ah	IRQ7	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2
LPT 3	278-27Ah	IRQ5	Pins 2 & 3	Pins 1 & 2	Pins 2 & 3
Disabled	N/A	N/A	N/A	Pins 2 & 3	Pins 2 & 3
Note: Pins designated should be in the closed position.

SERIAL PORTS 1 &AMP; 2 CONFIGURATION
Serial Port 1	Serial Port 2	JP17	JP18	JP19
COM1	COM2	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
COM2	COM1	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
COM1	Disabled	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
Disabled	COM1	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
Disabled	COM2	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
COM2	Disabled	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
Disabled	Disabled	Pins 2 & 3 closed	Pins 2 & 3 closed	Open

SERIAL PORT 1 (CN1) FORCED TRUE CONFIGURATION
Mode	JP24	JP25	JP26
Normal operation	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
Forced true	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed

SERIAL PORT 2 (JP31) FORCED TRUE CONFIGURATION
Mode	JP27	JP28	JP29
Normal operation	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
Forced true	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed

SERIAL PORT 1 (CN7) DTE/DCE CONFIGURATION
Function		JP30
»	DTE	Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, and 9 & 10 closed
	DCE	Pins 1 & 3, 2 & 4, 5 & 7, 6 & 8, and 9 & 10 closed

SERIAL PORT 2 (JP31) DTE/DCE CONFIGURATION
Function		JP23
»	DTE	Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, and 9 & 10 closed
	DCE	Pins 1 & 3, 2 & 4, 5 & 7, 6 & 8, and 9 & 10 closed