A technique by which data channels give the processor-controller the ability to delay the execution of a program for communication of an I／O device with storage.; 數(shù)據(jù)通道使處理機(jī)控制器能延遲一個(gè)程序的執(zhí)行,用來(lái)使輸入輸出設(shè)備與存儲(chǔ)器間通信 的技術(shù)。