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{\bf
CULLER 8
}

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\noindent
The company is no longer in business.

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\noindent
{\bf
Bus-connected parallel architecture
}

\noindent
{\bf
Company no longer in business
}

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{\bf Architecture:}
Proprietary 64-bit dual interleaved floating-point processors. Each
processor has a local high-speed static memory of 32 Mbytes. A global
dynamic memory is available in 24 Mbyte increments.


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\noindent
{\bf Configuration:}
The CULLER 8 is front-ended by
a SUN 3 with three board set performing at 37.5 Mflops.
An HSC link at 100 Mbytes/sec interconnects up to 16
computing nodes. Disk storage via IBIS 1 Gbyte drives with a 12
Mbyte/sec data transfer rate.

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\noindent
{\bf Software:}
The F77 and C compilers share a common back-end code generator. The
compilers are designed to exploit the architecture and make efficient
use of all internal parallel resources. DEC VMS extensions are
supported.

\noindent
CULLER CSD 4.2 UNIX is an extension of Berkeley 4.2 UNIX to integrate
user processes. All normal SUN networking and development utilities are
supported.
  
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\noindent
Floating-point arithmetic conforms to IEEE standard.

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\noindent
{\bf Performance:}
Up to sixteen processors (UPs, or Unit Processors) may be linked
with the CULLER 8 PSC. Each UP has a peak rating of 75 Mflops in both
single and double precision.

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\noindent
The harmonic mean of all the Livermore Loop benchmarks is expected
to be well in excess of 10 Mflops for each UP. This is scaled from the
established performance of the CULLER 7 architecture from which the
CULLER 8 is derived. The CULLER 8 has five times the scalar and ten
times the vector performance of that machine.

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\noindent
Additional hardware modules will accelerate specific algorithms such
as FFTs at 120 Mflops and convolution at 100 Mflops.

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\noindent
{\bf Status:}
The first beta site was to be COMPASS SYSTEMS in the UK in the
autumn of 1988. Deliveries of systems were to commence in 1989, with full
production by 2Q, 1989.

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\noindent
The price of a complete 37.5 Mflop CULLER 8 PSC was to be about
\$90,000, with 75 Mflop UPs costing about \$80,000.

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\noindent
{\bf Contact:}
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\begin{flushleft}
Glen Culler Associates\\

Martin Beenham\\
Compass Systems\\
Bridge House\\
Faraday Road\\
Newbury\\
Berks RG13 2DH\\
England\\
0635-521600  Telex 846301 Compas G     FAX (0635) 521268\\
\end{flushleft}

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