--- /dev/null
+\ *****************************************************************************
+\ * Copyright (c) 2004, 2008 IBM Corporation
+\ * All rights reserved.
+\ * This program and the accompanying materials
+\ * are made available under the terms of the BSD License
+\ * which accompanies this distribution, and is available at
+\ * http://www.opensource.org/licenses/bsd-license.php
+\ *
+\ * Contributors:
+\ * IBM Corporation - initial implementation
+\ ****************************************************************************/
+
+\ I/O accesses.
+
+\ Legacy I/O accesses.
+: >io f4000000 + ;
+
+: io-c! >io rb! ;
+: io-c@ >io rb@ ;
+
+: io-w! >io rw! ;
+: io-w@ >io rw@ ;
+
+\ Accessing the SIO config registers.
+: siocfg! 2e io-c! 2f io-c! ;
+: siocfg@ 2e io-c! 2f io-c@ ;