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\begin{abstract}
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\start/ is a joint MIT-Motorola project to build a high-performance
message passing machine from commercial systems.  Each {\em site} of
the machine consists of a PowerPC 620-based Motorola symmetric
multiprocessor (SMP) running the AIX 4.1 operating system.  Each
processor is connected to a low-latency, high-bandwidth network that
is directly accessible from user-level code.  In addition to fast
message passing capabilities, the machine has experimental support for
cache-coherent shared memory across sites.  When the machine requires
memory to be kept globally coherent, one processor on each site is
devoted to supporting shared memory.  When globally coherent shared
memory is not required, that processor can be used for normal
computation tasks. \start/ will be available at about the same time as
the base SMP is introduced in the marketplace.  The ability to be both
a standard SMP and an aggressive message passing machine with coherent
shared memory makes \start/ an excellent building block for
incrementally expandable parallel machines.

\end{abstract}
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%% Beginning of paper proper
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\input{intro}

\input{processor}

\input{hdw-overview}

\input{msg-support}

\input{sm-support}

\input{related-wk}

\input{conclusion}

\newpage
%\tableofcontents

\bibliographystyle{abbrv}
\bibliography{/bk/derek/tex/short-abbrevs,start}


