- In this paper, we present a hardware-software cosimulation environment for heterogeneoussystems. To be an efficient system verification environment for the rapid prototyping of heterogeneous systems, the environment provides interface transparency, simulation acceleration, smooth transition to cosynthesis, and integrated user interface and internal representation. As an experimental example, a heterogeneous system is cosimulated and prototyped successfully,which shows that our environment can be a useful heterogeneous system specificationherification environment for rapid prototyping.