Raster image memory (16) (RIM) comprising a bit-map memory (220) for the storage of the bit representation of a whole page to be printed for a raster output scanner (20) (ROS), the raster image memory to be filled by means of a raster image processor(15) (RIP) which is connected via a synchronous raster image bus system (17) (RI bus) to the raster image memory. A logic processing unit (223) is disposed between the raster image bus (17) and the bit-map memory (220), one input of the logic processing unit (223) being connected to the data lines of the raster image bus (17), and the other input of the logic processing unit being connected to the data outputs (226) of the memory (220). |