%T Prototyping transputer applications %A E. Hart, S. Flavell %E Hussein S. M. Zedan %B OUG\-13: Real\-Time Systems with Transputers %X The design is discussed of a toolset capable of estimating the performance of a transputer application at the design stage, prior to detailed code being available. The Transim/Gecko package from the Polytechnic of Central London is discussed in detail as an example of such a toolset. The methodology of the package is discussed, its input language, output format and the transputer scheduling model to which it adheres. An example is described of a real transputer application where the tool has been successfully used to improve performance.