Abstract: There is disclosed a program development system, a method for developing programs and a storage medium storing programs for development of programs by which the reduction in development periods of a program to be incorporated into a real time control system and the improvement of qualities are realized. A program development system comprises a state transition storing section to store a state transition matrix, a processing time storing section to store processing time required for an action described in each cell in the state transition matrix, and a simulator to obtain processing time required for a simulation of operations of a system by accumulating events inputted sequentially and time information corresponding to a cell specified sequentially by a state inputted as an initial state or a state subsequent to transition described in each cell.

Abstract: A software debugging method and a recording medium to which a debugging program has been recorded permit a shorter total time required for converting a source program to an object program and the time required for loading an object program into a debugging device. When it has been determined that a stored information file (108) exists, a linker (104) receives the stored information to compare a module size “m” before correction with a module size “n” after correction. If the module size “m” before correction is smaller than the module size “n” after correction, then those of up to the m-th module among the corrected modules are allocated to an actual memory area of a memory (107) where the modules before correction have been stored, and continuous addresses in an extended memory area (202) of the memory (107) are allocated to the programs from an address of (m+1) and after.