\noindent
{\bf
CDC CYBER 180 990E/995E
}


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\noindent
It is possible to do a field upgrade from the one-processor
992-31 to the two-processor 992-32. Each processor has a 16 nsec clock, a
32 Kbyte data cache, and an instruction cache of 64 instruction words
(equivalent to a maximum of
256 instructions).  There are no vector registers. There
are segmented functional units for addition/subtraction,
multiplication, scalar multiplication, division (4 units), shift,
integer addition/subtraction, compare, Boolean, increment, 
and character handling. There is shortstopping (that is,
effectively
chaining) but no scalar/vector overlap.

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\noindent
The memory size is from 16 to 256 Mbytes in 32 banks of
256 Kbit static MOS. There are four ports to memory, 2 for
the CPUs and 2 for I/O.
The bank busy time
is 96 nsec. The virtual address space is 8.8 trillion words/user.

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\noindent
Each system has from 8 to 256 MWords (64-bit words) of MOS semiconductor
shared memory using 256K DRAMS.
Memory sizes ares 8, 16, 32, 64, 128, or 256 million words.
There is a 1 MWord fast communication buffer for interprocessor communication and
synchronization.
The system has virtual memory addressing using a 48-bit address.
SECDEC is on each 32-bit half word.
The maximum transfer rate is 1 word per clock cycle between each CPU and
shared memory.

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\noindent
Up to 18 440 Mbit/sec I/O units are available for accessing disks, tapes,
other mainframes, and networks.
There is a dual-ported interface to 1.2 Gbytes (formatted) capacity
disks with a data transfer rate of 12 Mbytes per second, an average seek time
of 16 milliseconds, and an average latency of 8.3 milliseconds.
Each IOU can support up to 16 such drives.
Each IOU also can interface to as many as 20 1.1 Gbyte capacity, 3 Mbytes per second
SMD disks.
There are connections to 10 Mbit/sec Ethernet using TCP/IP,
CDC's 50 Mbit/sec.

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\noindent
Loosely Coupled network (LCN) using RHF
and a 50 Mbit/sec hyperchannel using TCP/IP.

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\noindent
{\bf Configuration:}
The ETA-10 can have a 
variety of front-ends including CDC, IBM, and DEC.
It can also operate stand-alone, with access from terminals and
workstations via Ethernet.

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\noindent
{\bf Software:}
\vspace{.1in}
ETA System V:
\begin{itemize}
   \item SVID compliant version of AT\&T's System V, Release 3.0
   \item TCP/IP/Telnet/FTP
  \item BSD 4.3 sockets and ``r'' commands
  \item Sun Microsystems' Network File System
  \item Network Queuing System batch support
 end{itemize}
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\noindent
EOS:
\begin{itemize}
  \item VSOS user environment
  \item TCP/IP/Telenet/FTP
  \item CDC Loosely Coupled Network
  \item UNIX utilities
\end{itemize}

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\noindent
Utilities:
\begin{itemize}
  \item Interactive symbolic debugger
  \item Symbolic postmortem dump
  \item Performance analyzer
  \item Source and object code maintenance
 \end{itemize}

\noindent
Many matrix algebra routines are available, including the BLAS in the LIB99 vectorized
subroutine library.
Also, an object code utility called Afterburner is available that
provides user-selected in-lining of system and user subroutines for reduction of
call/return overhead.

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\noindent
{\bf Languages available and Fortran characteristics:}
The operating system is NOS/VE and languages supported include
Fortran, Cobol, Lisp, Prolog, Pascal, C, Cybil, Basic, and APL.  There
is a hot spot analyzer available for Fortran codes.
The Fortran compiler allows many extensions including some anticipated  8x
constructs and generates vector code automatically. Compiler directives
are also available.

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\noindent
{\bf Performance:}
The peak performance of the 992 is 125 Mflops.

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\noindent
{\bf Contact:}
\begin{flushleft}
Control Data Corporation\\
P.O. Box O\\
HQS09B\\
Minneapolis, MN 55440\\
800-828-8001 ext 88\\

\end{flushleft}

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