MULTIPLEX QUEUE BUFFER CIRCUIT

摘要

PURPOSE:To form economically plural queues by referring to and replacing the status information words corresponding to those queues if the input data reaches each queue or a request is given for extraction of output data. CONSTITUTION:A memory 7 has a status information region of one word which stores the status information words S containing status information S1n-S3n showing the presence or absence and the arriving order of data to three data buffers B1n-B3n consisting of one word respectively for each queue. A status information state shift circuit 8 supplies the word S read out of the memory 7 and the control signal C given from a control circuit 11 and delivers a buffer designating information A which designates the buffers B1n-B3n which store the data supplied and delivered as well as the word S showing the states of data buffers after the data are supplied and delivered.