+\subsection{State}
+
+\frame
+{
+ \frametitle{Multiply-accumulate}
+ \begin{columns}
+ \begin{column}{4cm}
+ \begin{tabular}{lll}
+ Input A & Input B & Output \\
+ \hline
+ 1 & 1 & 1 \\
+ 1 & 2 & 3 \\
+ 1 & 1 & 4 \\
+ 2 & 2 & 8 \\
+ \end{tabular}
+ \end{column}
+ \begin{column}{6cm}
+ \begin{figure}
+ \includegraphics[width=7cm]{figures/archs/Mac}
+ \end{figure}
+ \end{column}
+ \end{columns}
+}
+
+\note[itemize]
+{
+ \item Next sheet: MAC circuit and I/O values
+ \item MAC is common circuit
+ \item Multiplies pairs, one pair at a time
+ \item Stores sum so far
+ \item Not pure!
+ \item Depends on inputs \emph{and} current register value
+ \item Solution: Put register value (state) in argument
+}
+