| 摘要 |
<p>PURPOSE: To synchronize an application program with the real output operation of an output device. CONSTITUTION: A request processing part 40 controls an interface with an application program 20. A synchronous output part 50 receives an output request from the application program 20 through the request processing part 40, waits it just for the time of data outputting to an output device 80 while referring to output time information in a data base 60 and reports the completion of output through the request processing part 40 to the application program 20 later. A device control part 70 receives the output request from the application program 20 through the request processing part 40, reads output data requested by the output request from a main storage device 30 and performs output processing of the output device 80.</p> |
