On Sat, Oct 3, 2009 at 4:19 AM, Bob Ammerman wrote: > Actually, the device manager in windows will show you the 'tree structure' > of all your USB ports and hubs. Just use the "Devices By Connection" option > on the "View" menu. > > You simply plug a device sequentially into all the ports on your computer > and see where it shows up in the tree. USBView is useful utility and it can show the tree. It comes with Microsoft's WDK (big download). http://www.microsoft.com/whdc/devtools/wdk/default.mspx http://www.microsoft.com/whdc/DevTools/WDK/WDKpkg.mspx FTDI's version: http://www.ftdichip.com/Resources/Utilities.htm -- Xiaofan http://mcuee.blogspot.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist