CONTROL PROCESSING SYSTEM FOR TELEGRAM BUFFER

摘要

PURPOSE:To eliminate need to perform the garbage processing of a telegram buffer for a processing part making use of a communication bus even in case this bus is cut off asynchronously, by controlling the telegram buffer in response to the communication bus. CONSTITUTION:The address information of secured transmission/reception telegram buffers 13A-13D are registered to buffer control tables 12-1 and 12-2 allocated to the communication buses respectively. Such a buffer control table is controlled by a communication bus table 11 containing the pointers to the buffer control table in response to the communication bus. When a communication bus control part 4 recognizes an asynchronous break, the table 11 is retrieved by an all-buffer release processing part 9. Thus all telegram buffers registered on the buffer control table of communication buses are released. Thus it is not needed for a communication bus application processing part using the communication bus to perform the garbage processing of the buffer.