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

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 3	J1	Serial port 2	J3
Serial port 4	J2	Serial port 1	J4

COMPATIBLE MODE ADDRESS SELECT
Port 1 (J4)	Port 2 (J3)	Port 3 (J1)	Port 4 (J2)	SW1/1	SW1/2	SW1/3
3F8h	2F8h	3E0h	3E8h	Off	Off	Off
3F8h	2F8h	2B0h	2B8h	On	Off	Off
3F8h	2F8h	1B0h	1B8h	Off	On	Off

EXPANDED MODE ADDRESS SELECT
Port 1 (J4)	Port 2 (J3)	Port 3 (J1)	Port 4 (J2)	SW1/1	SW1/2	SW1/3
280h	288h	290h	298h	On	On	Off
3E0h	3E8h	2E0h	2E8h	Off	Off	On
2A0h	2A8h	2B0h	2B8h	On	Off	On
1A0h	1A8h	2A0h	2A8h	Off	On	On

INTERRUPT SELECT
IRQ		SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
»	IRQ5	Off	Off	Off	On	Off
	IRQ2	On	Off	Off	Off	Off
	IRQ3	Off	On	Off	Off	Off
	IRQ4	Off	Off	On	Off	Off
	IRQ7	Off	Off	Off	Off	On

PRIMARY PORT NORMAL/FORCED TRUE SELECT
Setting	JP7/A	JP7/B	JP7/C
Normal	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

PRIMARY PORT DTE/DCE SELECT
Jumper JP8
DTE	DCE

SECOND PORT NORMAL/FORCED TRUE SELECT
Setting	JP6/A	JP6/B	JP6/C
Normal	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

SECOND PORT DTE/DCE SELECT
Jumper JP5
DTE	DCE

THIRD PORT NORMAL/FORCED TRUE SELECT
Setting	JP1/A	JP1/B	JP1/C
Normal	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

THIRD PORT DTE/DCE SELECT
Jumper JP3
DTE	DCE

FOURTH PORT NORMAL/FORCED TRUE SELECT
Setting	JP2/A	JP2/B	JP2/C
Normal	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

FOURTH PORT DTE/DCE SELECT
Jumper JP4
DTE	DCE