Operating Systems Device controllers elo devices have components A mechanical component device E electronic component g The electronic component is the device controller E may be able to handle multiple devices g Controller's tasks w Convert the serial bit stream into a block of bytes H Perform any error correction necessary H Copy it to main memory Gao Haichang, Software School, Xidian UniversityOperating Systems Gao Haichang , Software School, Xidian University 7 Device Controllers  I/O devices have components:  mechanical component （device）  electronic component  The electronic component is the device controller  may be able to handle multiple devices  Controller's tasks  Convert the serial bit stream into a block of bytes  Perform any error correction necessary  Copy it to main memory