public Z80ProcessorState(Z80ProcessorState state)
     : base(state)
 {
     this.arch = state.arch;
     this.registerFile = (ushort[])state.registerFile.Clone();
 }
 public Z80ProcessorState(Z80ProcessorArchitecture arch)
 {
     this.arch = arch;
     this.registerFile = new ushort[RegisterFileItems];
     this.isValid = new bool[RegisterFileItems];
 }