Queue management manner null of the center in the star condition

摘要

PURPOSE:To suppress the accumulation of commands leaving unprocessed, by deciding whether a sequence of processes are necessary or not when the command is inputted, and processing the command with the highest priority as a queue corresponding to each of the outgoing origin, and the transmission opposite of the command respective1y, when it is decided that a sequence of processes are necessary. CONSTITUTION:When the command is inputted from an i/o51 to a center 50, it is decided whether a sequence of processes for the command are necessary or not. When it is necessary to perform a sequence of processes, the command is set as the first queue for an i/o54 preferentially even when a previous appointment for the i/o54 that is a transmission opposite, is present. For this reason, when a response from the i/o54 is performed by the command corresponding to a queue 1, it is set as a queue 2. When the command for which a sequence of processes are not necessary, is inputted, queues are set as queues 4, 5-10, and they are connected in order to the queue of the i/o at each transmission opposite.