Patent ID: 6438634
Filing Date: 2002-08-20
Classification: G06F

Abstract:
A data processing system, comprising:a first apparatus for issuing a data read request and a data write request; a second apparatus for executing the read and write requests from the first apparatus and transferring, for the read request, read data to the first apparatus; and a bidirectional bus connecting data transfer interfaces respectively of the first and second apparatuses to each other, wherein the first apparatus includes: a write buffer for accumulating therein write data associated with a write request to be issued to the second apparatus; a monitor unit for monitoring an operation status of the bidirectional bus and outputting a bus mastership grant signal when detecting an event that the bus is in an available state; and a permitting unit for permitting, when the bus mastership grant signal is being received from the monitor unit, an operation to successively transmit at least one write data accumulated in the write buffer to the bidirectional bus.