I/O Port Functions UDF Windows 7 and x64-compatible! This is a simple I/O (Input/Output) UDF for interacting with ports. The ability to write to ports was stripped from Windows with Vista+. While many do not miss this ability, there are some uses still in existence: Re-enable the internal PC Speaker - the good ol' "Beep" function can be restored using basic I/O PS/2 Keyboard Functions - Turn it off/on, mess with LED's, inject keys into the keyboard output stream - even thwart UAC prompts! =O