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Parapin makes it easy to write code under Linux that controls individual pins on a PC parallel port. This kind of control is very useful for electronics projects that use the parallel port as a generic digital I/O interface (instead of as a printer port)
pinset is a program wich lets you easily set or read your LPT port datapins' state. It uses the 'parapin' library but comes with a precompiled and static linked binary which makes the library unnecessary for normal use.