http://www.jungo.com/hardware_debugger.html?freshmeat Program lets you read and write USB, PCI etc to help you debug your grubby custom hardware. Runs on many Win*s and *NIXes. Cheerful regards, Bob -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads