| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform efficient bus control at the time of transferring the command and data of a packet form by using a common bus with respect to a data processing system. SOLUTION: In this data-processing system, plural equipment mutually transmit and receive packets by using the common bus, the respective equipment output the use request signals of the common bus of predetermined priority prior to packet transmission and a bus arbiter is provided with a control means for mediating the use request signals of the common bus, deciding the using equipment of the common bus corresponding to the priority and granting a permission. The respective equipment are provided with a means for outputting the use request signals of the common bus and outputting information for indicating the transfer opposite party, the bus arbiter is provided with a means for receiving the information and a packet reception side equipment is provided with a means for reporting the information of the state or the like to the bus arbiter or/and all the equipment, when the buffer for reception command packets of the present equipment is busy and is in a state, incapable of receiving a new command packet.</p> |
