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                      THE TRANSIM AND GECKO TOOLSET

               A Prototyping Package for Transputer Systems



                       Polytechnic of Central London



           Most large structures - ships, aeroplanes,  buildings  -
           are  not designed from scratch without preparing a model
           first, and the same approach can be  taken  in  parallel
           computing.    The  Transim/Gecko  combination  of  tools
           enable visualisation and  performance  evaluation  of  a
           transputer system before the full code is written or the
           hardware put together.

           The toolset comprises a simulator (Transim) and a graph-
           ical  front-end  (Gecko).   Transim  will  simulate  the
           behaviour of an application  program  running  on  Inmos
           transputers;  simulating a single process or an applica-
           tion running on a large network.  The input being a com-
           plete   description  of  the  hardware  -  link  speeds,
           timeslice periods, network topology, etc., plus an algo-
           rithm  description  section  designed  to facilitate the
           process of transferring a mental picture of an algorithm
           onto paper.  The output of the simulator can be fed into
           Gecko, which will then build an animated diagram of  the
           network,  in  colour,  showing the activity of each pro-
           cess, cpu and link as it varies in time  throughout  the
           execution  of the algorithm.  Parallel execution, alter-
           nation, channel communication, timeslicing,  priorities,
           interrupts,  concurrent  operation  of transputer links,
           effects of external memory and  so  on  are  taken  into
           account.   A special facility is provided for experimen-
           tation in the mapping of processes to processors.

           Written in: C language.

           Running on: Sun  3:  colour  or  monochrome  or  without
                graphics  if Transim is used alone.  IBM PC or com-
                patible: Transim only, no graphics.

           Contact: Ed Hart or Dr S C Winter,
                Centre for Parallel Computing,
                115 New Cavendish Street, London, W1M 8JS, UK.
                Email: harter@uk.ac.pcl.sun
                Telephone: 071-911 5000 ext 3659
                Fax: 071-911 5089
                Answerphone: 071-911 5099

           Price: Sun: #1000 +  VAT,  Transim  alone  #800  +  VAT,
                academics:  50%  discount. IBM: Transim alone #300,
                no discounts.

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