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Is it possible to use a parallel port to emulate RS-232/UART handshaking lines? If so, is there any example "C" source code available...
Parallel port has TTL outputs, so you'd have to convert them to RS-232 levels. Besides, Windows cannot guarantee real-time response to events, so now and then your serial port emulator would choke because of unexpected delays. DOS would do just fine :-) If you can overcome those problems, it's entirely possible. - mike