| 摘要 |
PURPOSE:To reduce the time required for the determination of priority, by providing the priority determining circuit which determines the priority of right using common resouce with each device with scattering. CONSTITUTION:Data processing units (PU) 1301-13064 use a common memory unit, not shown, in time-sharing. PUs 1301-13064 produce request signals REQ1- REQ64 when the common memory device is desired to be used and receive acknowledgement signals ACK1-ACK64. Priority determining circuits (unit) 1401-14064 are provided corresponding to PUs 1301-13064 to supply REQ1-REQ64. Synchronizing signal SYNC is fed from the synchronizing signal generator 150 to the units 1401-14064. Since the ACK signal is output to the units 1401-14064 according to the REQ signal distributed on the binary interrupting line 160 connected to the discrimination line, the time required for judgement can be reduced. |
