On the three methods for generating the data processing functions for a digital logic test system; namely, manually written, hardware-simulated and software-simulated, the latter is the fastest but also has been the most costly. The method normally requires using a large computer. It is shown how to overcome the high cost of utilizing the minicomputer contained in a typical test system, with modifications. The author tells of choosing a computer adequate to handle software simulation and then building a test system to match the computer's capabilities.