UN-451 IO card Settings and Configuration

Card Type	Multi I/O card
Chipset/Controller	Unknown
I/O Options	Game port, parallel port, serial ports (2)
Maximum DRAM	N/A

CONNECTIONS
Purpose	Location	Purpose	Location
Parallel port	CN1	Serial port 1	ASYN1
Game port	CN2	Serial port 2 (optional)	ASYN2

PARALLEL PORT CONFIGURATION
LPT/Address/IRQ		JP1
»	LPT1/378h/IRQ7	Pins 5 & 6/2 & 3 closed
	LPT2/278h/IRQ5	Pins 4 & 5/1 & 2 closed
	Disable	Pins 4, 5, & 6/1, 2, & 3 all open

SERIAL PORT 1 (ASYN1) CONFIGURATION
COM/Address/IRQ		JP1
»	COM1/3F8h/IRQ4	Pins 20 & 21/10 & 11 closed
	COM2/2F8h/IRQ3	Pins 16 & 17/11 & 12 closed
	COM4/2E8h/IRQ3	Pins 19 & 20/11 & 12 closed
	Disable	Pins 16 & 17/19, 20, & 21/10, 11, & 12 all open

SERIAL PORT 2 (ASYN2) CONFIGURATION
COM/Address/IRQ		JP1
»	COM2/2F8h/IRQ3	Pins 17 & 18/8 & 9 closed
	COM3/3E8h/IRQ4	Pins 13 & 14/7 & 8 closed
	COM4/2E8h/IRQ3	Pins 14 & 15/8 & 9 closed
	Disable	Pins 17 & 18/13, 14, & 15/7, 8, & 9 all open

MISCELLANEOUS TECHNICAL NOTES

Serial port 2 (ASYN2) exists only on model UN451b. Model UN-451a has only one serial port

The pin numbers for JP1 printed on the actual card are incorrect. Use the numbers depicted on the above diagram to re-configure the card.

The game port can be disabled by cutting a wire on the soldering side of the card. It is located near the edge opposite of the external ports and toward the center.