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MT-456
UNIDENTIFIED

MT-456

Card Type	Multi I/O card
Chipset/Controller	Unidentified
I/O Options	Parallel port, serial ports (2), game port
Maximum DRAM	N/A

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 2 - internal	J3	Game port	J5
Serial port 1 - internal	J4	Parallel port	J6

SERIAL PORT 1 CONFIGURATION
COM/Address		J1/JP1	J1/JP2
�	COM1/3F8h	Pins 1 & 2 closed	Pins 1 & 2 closed
	COM3/3E8h	Pins 2 & 3 closed	Pins 1 & 2 closed
	Disabled	N/A	Pins 2 & 3 closed

SERIAL PORT 1 INTERRUPT SELECT
IRQ		J2/A	J2/B	J2/C	J2/D
�	IRQ4	Pins 2 & 3 closed	Pins 2 & 3 open	Pins 2 & 3 open	Pins 2 & 3 open
	IRQ3	Pins 2 & 3 open	Pins 2 & 3 closed	Pins 2 & 3 open	Pins 2 & 3 open
	IRQ5	Pins 2 & 3 open	Pins 2 & 3 open	Pins 2 & 3 closed	Pins 2 & 3 open
	IRQ9	Pins 2 & 3 open	Pins 2 & 3 open	Pins 2 & 3 open	Pins 2 & 3 closed

SERIAL PORT 2 CONFIGURATION
COM/Address		J1/JP3	J1/JP4
�	COM2/2F8h	Pins 1 & 2 closed	Pins 1 & 2 closed
	COM4/2E8h	Pins 2 & 3 closed	Pins 1 & 2 closed
	Disabled	N/A	Pins 2 & 3 closed

SERIAL PORT 2 INTERRUPT SELECT
IRQ		J2/A	J2/B	J2/C	J2/D
�	IRQ3	Pins 1 & 2 open	Pins 1 & 2 closed	Pins 1 & 2 open	Pins 1 & 2 open
	IRQ4	Pins 1 & 2 closed	Pins 1 & 2 open	Pins 1 & 2 open	Pins 1 & 2 open
	IRQ5	Pins 1 & 2 open	Pins 1 & 2 open	Pins 1 & 2 closed	Pins 1 & 2 open
	IRQ9	Pins 1 & 2 open	Pins 1 & 2 open	Pins 1 & 2 open	Pins 1 & 2 closed

PARALLEL PORT CONFIGURATION
LPT/Address		J1/JP5	J1/JP6
�	LPT1/378h	Pins 1 & 2 closed	Pins 1 & 2 closed
	LPT2/278h	Pins 2 & 3 closed	Pins 1 & 2 closed
	Disabled	N/A	Pins 2 & 3 closed

PARALLEL PORT INTERRUPT SELECT
IRQ	J2/E
IRQ5	Pins 2 & 3 closed
IRQ7	Pins 1 & 2 closed

GAME PORT
Setting		J1/JP7
�	Enabled	Pins 1 & 2 closed
	Disabled	Pins 2 & 3 closed