diff -r 5a3eb30fe71a -r d18fec611bbd configs/ruby/Ruby.py
--- a/configs/ruby/Ruby.py	Fri Jul 22 16:01:50 2016 +0100
+++ b/configs/ruby/Ruby.py	Fri Jul 22 16:46:36 2016 +0100
@@ -194,6 +194,8 @@
     # independent of the protocol and kept in the protocol-agnostic
     # part (i.e. here).
     sys_port_proxy = RubyPortProxy(ruby_system = ruby)
+    if piobus is not None:
+        sys_port_proxy.pio_master_port = piobus.slave
 
     # Give the system port proxy a SimObject parent without creating a
     # full-fledged controller
diff -r 5a3eb30fe71a -r d18fec611bbd src/mem/ruby/system/RubyPort.cc
--- a/src/mem/ruby/system/RubyPort.cc	Fri Jul 22 16:01:50 2016 +0100
+++ b/src/mem/ruby/system/RubyPort.cc	Fri Jul 22 16:46:36 2016 +0100
@@ -312,9 +312,10 @@
     // Check for pio requests and directly send them to the dedicated
     // pio port.
     if (!isPhysMemAddress(pkt->getAddr())) {
-        assert(rp->memMasterPort.isConnected());
         DPRINTF(RubyPort, "Pio Request for address: 0x%#x\n", pkt->getAddr());
-        panic("RubyPort::PioMasterPort::recvFunctional() not implemented!\n");
+        assert(rp->pioMasterPort.isConnected());
+        rp->pioMasterPort.sendFunctional(pkt);
+        return;
     }
 
     assert(pkt->getAddr() + pkt->getSize() <=