Component with multiple slave ports

I have develloped a component which among other things embeds an internal RAM area for a NIOS2 CPU.

But unlike the epcs controller which has only one slave port for ram and register access, i have implemented

several slave ports for various reasons.

But now the SOPC builder insists of assigning all of these slave ports the same base address. (screenshot (http://www.vmars.tuwien.ac.at/~klaus/sopc_snapshot2.jpg))

After building this system, i don't really know how to access a specific address of a specific port

(remember: all ports have the same base address)

If i change the base addresses of the ports manually, the SOPC builder states several errors and refuses to build the system (screenshot (http://www.vmars.tuwien.ac.at/~klaus/sopc_snapshot.jpg)).

Can someone help me?

Stonie