"iobase" pcmcia?

hi i got the code of Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)in 
this code and some other codes i have seen there is a parameter called "iobase "
its being used in many palces like
 outb(0x08 | 0x20, iobase + 0x30);
soem functions take it as argument but i dont know how we r getting a partcular 
address as nowhere its intialized to some address.
i want to know what this address is? is it base address of io window? is the 
pcmcia memory is part of io memory? how we get a value for tha parameter 
"iobase"
thanks
abhay