Parapin makes it easy to write C 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 PC's parallel port as a generic digital I/O
interface. Parapin goes to great lengths to insulate the programmer from the
somewhat complex parallel port programming interface provided by the PC hardware,
making it easy to use the parallel port for digital I/O. By the same token, this
abstraction also makes Parapin less useful in applications that need to actually
use the parallel port as a parallel port (e.g., for talking to a printer).
Parapin has two "personalities": it can either be used as a user-space C library,
or linked as part of a Linux kernel module. This SlackBuild provides user-space
only library.
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