External data interface in a computer architecture for broadband networks

System is a processing unit, an I/O () interface device and shared buffer memory. PE - comprising at least one processing unit, and one or multiple is adhered processing unit. At least one of APU is connected with the external device reading data of I/O interface device, and data writing performing I/O function. By the data synchronizing layer device and a path of the shared buffer memory, exchanges the data between APU and I/O interface device.