I/O EXPANDER 4S IO card Settings and Configuration

Card Type	Serial card
Chipset Controller	16550 UART
I/O Options	Serial ports (4)
Maximum DRAM	N/A

CONNECTIONS
Purpose	Location	Purpose	Location
25-pin serial port	SE1	10-pin serial port interface	SE3
9-pin serial port	SE2	10-pin serial port interface	SE4

SERIAL PORT 1 CONFIGURATION
COM		S1/A	S1/B	S1/C	S1/D
»	COM2 (2F8h-2FFh)	Open	Open	Closed	Open
	COM1 (3F8h-3FFh)	Open	Open	Open	Closed
	COM3 (3E8h-3EFh)	Open	Closed	Open	Open
	COM4 (2E8h-2EFh)	Closed	Open	Open	Open
	Disabled	Open	Open	Open	Open

SERIAL PORT 1 INTERRUPT SELECTION
IRQ		JP8/A	JP8/B	JP8/C	JP8/D	JP8/E	JP8/F	JP8/G	JP8/H	JP8/I
»	3	Closed	Open	Open	Open	Open	Open	Open	Open	Open
	2/9	Open	Open	Open	Open	Closed	Open	Open	Open	Open
	4	Open	Closed	Open	Open	Open	Open	Open	Open	Open
	5	Open	Open	Closed	Open	Open	Open	Open	Open	Open
	7	Open	Open	Open	Closed	Open	Open	Open	Open	Open
	10	Open	Open	Open	Open	Open	Closed	Open	Open	Open
	11	Open	Open	Open	Open	Open	Open	Closed	Open	Open
	12	Open	Open	Open	Open	Open	Open	Open	Closed	Open
	15	Open	Open	Open	Open	Open	Open	Open	Open	Closed
	Disabled	Open	Open	Open	Open	Open	Open	Open	Open	Open

SERIAL PORT 2 CONFIGURATION
COM		S2/A	S2/B	S2/C	S2/D
»	COM1 (3F8h-3FFh)	Open	Open	Open	Closed
	COM2 (2F8h-2FFh)	Open	Open	Closed	Open
	COM3 (3E8h-3EFh)	Open	Closed	Open	Open
	COM4 (2E8h-2EFh)	Closed	Open	Open	Open
	Disabled	Open	Open	Open	Open

SERIAL PORT 2 INTERRUPT SELECTION
IRQ		JP7/A	JP7/B	JP7/C	JP7/D	JP7/E	JP7/F	JP7/G	JP7/H	JP7/I
»	4	Open	Closed	Open	Open	Open	Open	Open	Open	Open
	2/9	Open	Open	Open	Open	Closed	Open	Open	Open	Open
	3	Closed	Open	Open	Open	Open	Open	Open	Open	Open
	5	Open	Open	Closed	Open	Open	Open	Open	Open	Open
	7	Open	Open	Open	Closed	Open	Open	Open	Open	Open
	10	Open	Open	Open	Open	Open	Closed	Open	Open	Open
	11	Open	Open	Open	Open	Open	Open	Closed	Open	Open
	12	Open	Open	Open	Open	Open	Open	Open	Closed	Open
	15	Open	Open	Open	Open	Open	Open	Open	Open	Closed
	Disabled	Open	Open	Open	Open	Open	Open	Open	Open	Open

SERIAL PORT 3 CONFIGURATION
COM		S3/A	S3/B	S3/C	S3/D
»	COM3 (3E8h-3EFh)	Open	Closed	Open	Open
	COM1 (3F8h-3FFh)	Open	Open	Open	Closed
	COM2 (2F8h-2FFh)	Open	Open	Closed	Open
	COM4 (2E8h-2EFh)	Closed	Open	Open	Open
	Disabled	Open	Open	Open	Open

SERIAL PORT 3 INTERRUPT SELECTION
IRQ		JP6/A	JP6/B	JP6/C	JP6/D	JP6/E	JP6/F	JP6/G	JP6/H	JP6/I
»	10	Open	Open	Open	Open	Open	Closed	Open	Open	Open
	2/9	Open	Open	Open	Open	Closed	Open	Open	Open	Open
	3	Closed	Open	Open	Open	Open	Open	Open	Open	Open
	4	Open	Closed	Open	Open	Open	Open	Open	Open	Open
	5	Open	Open	Closed	Open	Open	Open	Open	Open	Open
	7	Open	Open	Open	Closed	Open	Open	Open	Open	Open
	11	Open	Open	Open	Open	Open	Open	Closed	Open	Open
	12	Open	Open	Open	Open	Open	Open	Open	Closed	Open
	15	Open	Open	Open	Open	Open	Open	Open	Open	Closed
	Disabled	Open	Open	Open	Open	Open	Open	Open	Open	Open

SERIAL PORT 4 CONFIGURATION
COM		S4/A	S4/B	S4/C	S4/D
»	COM4 (2E8h-2EFh)	Closed	Open	Open	Open
	COM1 (3F8h-3FFh)	Open	Open	Open	Closed
	COM2 (2F8h-2FFh)	Open	Open	Closed	Open
	COM3 (3E8h-3EFh)	Open	Closed	Open	Open
	Disabled	Open	Open	Open	Open

SERIAL PORT 4 INTERRUPT SELECTION
IRQ		JP5/A	JP5/B	JP5/C	JP5/D	JP5/E	JP5/F	JP5/G	JP5/H	JP5/I
»	11	Open	Open	Open	Open	Open	Open	Closed	Open	Open
	2/9	Open	Open	Open	Open	Closed	Open	Open	Open	Open
	3	Closed	Open	Open	Open	Open	Open	Open	Open	Open
	4	Open	Closed	Open	Open	Open	Open	Open	Open	Open
	5	Open	Open	Closed	Open	Open	Open	Open	Open	Open
	7	Open	Open	Open	Closed	Open	Open	Open	Open	Open
	10	Open	Open	Open	Open	Open	Closed	Open	Open	Open
	12	Open	Open	Open	Open	Open	Open	Open	Closed	Open
	15	Open	Open	Open	Open	Open	Open	Open	Open	Closed
	Disabled	Open	Open	Open	Open	Open	Open	Open	Open	Open

SERIAL PORT 3 & 4 ACTIVATION
Chip	Socket
16450	U3
16450	U4
1489	U9
1488	U11
1489	U14
Note: To activate serial ports 3 & 4 upgrade chips must be installed.