| 释义 |
I/O status/command word /O device is doing.Each statusword bit indicates a particular condition, such as message data are ready for transmission, device is busy, device is unavailable, or transmission errors.However, in contrast, a command word controls the actual operation of the device.Each commandword bit has its own function, such as stopping the motor, incrementing a feed, or changing the transmission rate.；一种描述输入输出设备正在做什么的状态字。状态字的每一位对应一个具体的条件,例如信息数据准备好等待传输、设备忙、设备不能用或传输出错等。输入输出命令字则相反,它控制设备的实际操作。命令字的每一位都有它自己的功能,例如停止马达、进一行或改变传输率等。 |