case 0xE1: //DEX

			--Index_Registers[REGISTER_X];
			set_flag_z(Index_Registers[REGISTER_X]);

			break;

		case 0xE2: //INX

			++Index_Registers[REGISTER_X];
			set_flag_z(Index_Registers[REGISTER_X]);

			break;

		case 0x0C: //MAY

			Index_Registers[REGISTER_Y] = Registers[REGISTER_A];
			set_flag_n(Index_Registers[REGISTER_Y]);

			break;

		case 0x0D: //MYA

			Registers[REGISTER_A] = Index_Registers[REGISTER_Y];
			set_flag_n(Registers[REGISTER_A]);
			set_flag_z(Registers[REGISTER_A]);

			break;

		case 0xE3: //DEY

			--Index_Registers[REGISTER_Y];
			set_flag_z(Index_Registers[REGISTER_Y]);

			break;

		case 0xE4: //INCY

			++Index_Registers[REGISTER_Y];
			set_flag_z(Index_Registers[REGISTER_Y]);

			break;