ASYNCHRONOUS INPUT-OUTPUT CONTROL SYSTEM

摘要

PURPOSE:To improve the through of a system by executing input and output to a buffer and channel program area by means of the input and output from a user job by using the memory resource of the system and returning the buffer and channel program area to a system area when the input and output are completed., CONSTITUTION:A systematization input-output means 5 implements a channel program in the channel program area 11 of a system and executes the program. When the completion of the input-output operation of a periphery device 6 is informed to an input-output completion processing means 7, the means 7 actuates an asynchronous input-output completion processing means 8 when the input-output request is made from a user job whose input-output completion is systematized. upon completing the input-output completion process, the means 8 actuates a system resource returning means 9 in succession so as to return the buffer and channel program areas used for the input-output processes. Therefore, the means 9 returns the used areas to a buffer area 10 and the channel program area 11. Therefore, the process can proceed to the next step without waiting for the completion of input and output.