Data processing system comprising a plurality of data processing apparatus conducting data communications through a bus line

摘要

An image processing system has a computer bus line to which a communication controller or the like is connected, an image reader, an RP adapter including a data compressor unit, a serial-to-parallel converter, a data restoration unit and a parallel-to-serial converter, and a CPU and a controller for selecting the data from the image reader or the communication controller. While no image data is transferred on the bus line, data transfer from the communication controller or the like via the bus can be performed.