EVALUATION TESTING INSTRUMENT

PURPOSE:To make a program evaluation accurate by making it possible to change over automatically a data transfer between computer and input port and also by making it possible to input data to a memory, while the memory stores plural data in advance at an address equivalent to a specific input port. CONSTITUTION:In connection with an evaluation of a system 10 to be evaluated comprising program memory 2, input ports P1, P2... and CPU 1, an evaluation testing instrument 20 consists of control circuit 5, input device 7 and input port operation definition memory 9, and a data transfer between CPU 1 and port P1... is automatically changeable to the data transfer between CPU 1 and its instrument 20 through a circuit 5. Furthermore, data for a pseudo- operation are stored at a memory 9 in advance and at the same time it is necessary to definite the transfer data to CPU 1 as well as an existence of any interruption. And when the circuit 5 sends an interruption signal to the system 10 and CPU 1 starts to read data of port P1..., such data are transferred from the memory 9 to CPU 1 and allow address points to increase.