In ixasdk/src/microace/aces/interface_ace/source/driver/octdrv/octmac.c it says that the default names for the devices in /dev are octMac0,...octMac7 but the README file says mac0...mac7. I changed my code to say mac--will this affect anything (like the interface aces)? Austen McDonald austen@cc.gatech.edu God does not care about our mathematical difficulties. He integrates empirically. -- Albert Einstein