The heterogeneous machine simulator is a program which attempts to simulate the proposed hardware for the heterogeneous machine at a high level, along with the low level programming abstractions which have been proposed. This will, hopefully, provide: 1) a reasonable basis for programmers to evaluate application designs in the absence of the actual machine; and 2) a testbed for designers to experiment with various reconfigurations which might be difficult to perform on the machine itself. This document presents a basic description of the system, and an example of how a simulation may be run.