RESERV Interfacing the Enhanced Parallel Port (EPP).pdf
RESERV Interfacing the Extended Capabilities Parallel Port (ECP).pdf
RESERV Interfacing the serial RS-232 port v5.0.pdf
RESERV Interfacing the Standard Parallel Port (SPP).pdf
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       "The first 90% of the code accounts for the first 90% of the
        development time. The remaining 10% of the code accounts for the
        other 90% of the development time."             -- Tom Cargill