Designed in this work with a chip ARM7, an embedded development platform for a game machine is composed of analogue as well as digital circuits, such as a video graphics array (VGA) monitor circuit, an audio amplifier and an external memory circuits. In an attempt to achieve a well stabilized system with a low cost, a printed circuit board (PCB) layout is made in such a way that the system stability is as intended gained as a consequence of significant signal interference reduction simulated by the EMIStream EDA Tool.