Network for mutually connecting computers and communicating method using

Abstract

A data communication system for a computer system in which computers are mutually connected includes: each computer having an area to store a command to execute data communication on the basis of it and a buffer area to store data; a switch circuit to mutually selectively connect the computers; and a transmission permitting component, connected between the switch circuit and one of the computers, for outputting a signal to permit the data transmission from one computer to another computer; a communication component for transmitting the data received from one computer by outputting the transmission permission signal from the transmission permitting component to another computer through the switch circuit; a detecting component to detect the occurrence of an abnormality regarding the data communication from one computer to another computer; and a communication control component to abandon the data that is subsequently received from one computer by outputting the transmission permission signal in accordance with an output of the detecting component. When the abnormality occurs, the switch circuit releases another computer, thereby disconnecting one computer and another computer. When reception commands prepared in the buffer area of another computer are perfectly used, another computer abandons the packet which does not include the flag to instruct the continuous reception.