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\subsection{TPHD - Level 1 Phi Trigger Output Bank}
A proposed level 1 trigger for $\phi\rightarrow K^+K^-$ will be implemented
using Pulsar modules.  The level 2 buffers will contain diagnostic
information for validation and commissioning.  There will be four
Pulsars used to implement this trigger which will all be located in the
same crate.  The {\tt TPHD} bank format is described in Table~\ref{tab-tphd},
however the contents of the data words remains unspecified at this time.

\begin{table}
  \begin{center}
    \begin{tabular}{|c|}\hline
      ``TPHD'' \\ \hline
      Bank number \\ \hline
      Bank version \\ \hline
      Bank length \\ \hline
      Bank type (I*4) \\  \hline\hline
      Number of blocks (=1) \\ \hline
Pointer to block 0  \\ \hline
  Pointer to end of data \\ \hline\hline
Block 0: Number of cards (=4) \\ \hline
Pointer to card 0             \\ \hline
Pointer to card 1             \\ \hline
Pointer to card 2             \\ \hline
Pointer to card 3             \\ \hline
Pointer to end of block       \\ \hline
Data from Pulsar 0\\ \hline
  ... \\ \hline\hline
Data from Pulsar 1 \\ \hline
  ... \\ \hline\hline
Data from Pulsar 2 \\ \hline
  ... \\ \hline\hline
Data from Pulsar 3 \\ \hline
  ... \\ \hline
\end{tabular}
\end{center}
\caption{\label{tab-tphd}Structure of the TPHD bank.}
\end{table}
Data from each Pulsar module is stored in the format shown in
Table~\ref{tab-tphdwords} in which the first word is a header word that
includes bunch counter and module identification information.  The bit
fields for this word will be fully specified at a later time.   The
remaining words are currently unspecified.
\begin{table}
  \begin{center}
    \begin{tabular}{|c|}\hline
Module identifier \\ \hline
data word \\ \hline\hline
{...} \\ \hline\hline
data word \\ \hline
\end{tabular}
\end{center}
\caption{\label{tab-tphdwords}TPHD data words.}
\end{table}

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