在中斷中，置一個(gè)屏蔽位為0叫作輸入輸出處理禁止。
In interrupts, the setting of a mask bit to0 is called disabling an input/ output processing.
一種存取方法，只有當用戶(hù)程序提出請求時(shí)，才能實(shí)現通過(guò)輸入輸出通道的數據傳輸。
A method of access in which data transfers through input/output channels are made only as and when called for in a user program.
為加速輸入輸出操作，使用兩個(gè)或多個(gè)輸入輸出部件的技術(shù)。同ORoperation。
A technique which uses two or more input/output units in an attempt to speed up input and output operations.
