Simulation Model of the Computer's Units and Peripherial Equipment Interaction

The paper deals with the principles of constructing a simulation model for studying the basic processes and devices in the computer I / O subsystem. The procedure for selecting the composition of the studied characteristics of input-output devices, as well as the structure and level of detail of the parameters of the objects under study is considered. Typical computer hardware with keyboard and monitor is offered as a peripheral device. When modeling, probabilistic characteristics of data processing in the input-output subsystem are set. The modeling program is developed in Java in NetBeans 8.1. A user interface based on the animation of the processes in I / O subsystem is described. This provides obtaining a visual representation of interrupts, generation of control signals, and transfer of codes from peripheral devices to the memory and the central processor. The user interface provides the setting of the necessary modes and simulation parameters. The simulation results are presented in the form of time charts of devices and the numerical values of these characteristics. The input / output system under study can operate in one of three modes: only with information input, with data input and output to a monitor, and also only with data processing and output to a monitor. The paper presents the study results of the simulated system in various modes, confirming the adequacy of the developed model.