422ICCA, 422ICCB IO card Settings and Configuration

Card Type	Serial
Chipset	16550A (422ICCA) 16750 (422ICCB)
I/O Options	Serial port
Data Bus	8-bit ISA

CONNECTIONS
Function	Label
RS-422 or RS-485 serial port	J1

USER CONFIGURABLE SETTINGS
Setting		Label	Position
	Serial port is RS-485	JP1/A	Pins 1 & 2 closed
	Serial port is RS-422	JP1/A	Pins 2 & 3 closed
»	Handshaking signals normal	JP1/B	Pins 1 & 2 closed
	Handshaking signals forced high	JP1/B	Pins 2 & 3 closed

SERIAL PORT ADDRESS SELECTION
Setting	JP2/A	JP2/B	JP2/C	JP2/D
3F8h (COM1:)	Closed	Open	Open	Open
2F8h (COM2:)	Open	Closed	Open	Open
3E8h (COM3:)	Open	Open	Closed	Open
2E8h (COM4:)	Open	Open	Open	Closed

INTERRUPT SELECTION
Setting	JP3/A	JP3/B	JP3/C	JP3/D	JP3/E	JP3/F
IRQ2	Open	Open	Open	Open	Open	Closed
IRQ3	Open	Open	Open	Open	Closed	Open
IRQ4	Open	Open	Open	Closed	Open	Open
IRQ5	Open	Open	Closed	Open	Open	Open
IRQ6	Open	Closed	Open	Open	Open	Open
IRQ7	Closed	Open	Open	Open	Open	Open