Try this command at the terminal. When I do it on a machine with an on board port and a 2 port pci card this is what it shows.
cat /proc/ioports | grep parport
Code:
digital1@digital1:~$ cat /proc/ioports | grep parport
0378-037a : parport0
e030-e032 : parport2
e050-e052 : parport1
digital1@digital1:~$
The on board port is address 0378, and the other two are e030 and e050.
lspci -v on the same machine shows.
Code:
04:00.0 Communication controller: NetMos Technology PCI 9815 Multi-I/O Controller (rev 01)
Subsystem: LSI Logic / Symbios Logic 2P0S (2 port parallel adaptor)
Flags: medium devsel, IRQ 18
I/O ports at e050 [size=8]
I/O ports at e040 [size=8]
I/O ports at e030 [size=8]
I/O ports at e020 [size=8]
I/O ports at e010 [size=8]
I/O ports at e000 [size=16]
Kernel driver in use: parport_pc
