private final Memory ram;
private Memory rom;
public SymonMachine() throws Exception {
this.bus = new Bus(BUS_BOTTOM, BUS_TOP);
this.cpu = new Cpu();
this.ram = new Memory(MEMORY_BASE, MEMORY_BASE + MEMORY_SIZE - 1, false);
this.pia = new Via6522(PIA_BASE);
this.acia = new Acia6551(ACIA_BASE);
this.crtc = new Crtc(CRTC_BASE, ram);