To connect a single large-scale memory array to a plurality of networks by using a stream processor for generating a communication protocol.

In the network, one or more protocols are used for data communications, and a transport protocol stack is generated in accordance with each network. Since the stack is generated by hardware, a throughput is remarkably improved and the number of streams which can be generated is increased. Since the protocol stack is generated by the hardware, a broadband data bus and a broadband address bus can be used and as a result, the throughput from the large-scale memory array is performed at higher speed. A plurality of protocol generators access the same memory block, a great number of streams are generated by a single copy from contents located in the large-scale memory buffer array.