\input zb-basic
\input zb-ioport
\iteman{io-port 50310227}
\itemau{Frank, Edward H.; Sproull, Robert F.}
\itemti{Testing and debugging custom integrated circuits}
\itemso{ACM Comput. Surv. 13, No. 4, 425-451 (1981).}
\itemcc{}
\itemut{}
\itemli{doi:10.1145/356859.356863}
\end