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This is really easy...Get the pinouts of the parallel port...some site like:www.darkportal.com/cc as I remember...pin 1: Strobe (+5v) for running IC'sPin 2-9: 8 bits Output (+5v/0v) Set bits on address: port &Hx378next 8(7?) bits are input pins nomatter what anyreference says...read these pins at port &hx379 and &hx37A
you can output/input logic 1 or 0 on these pinsdo not apply more than 5+V on input it will fry your controller, believe me I've tried it, anddo not apply motors directly on port.You don't need any electronic, you've got I/O here
If you have any specific questionshelp your self an write me a note!!!