数据缓冲寄存器(Data Register,DR)用来暂时存放由内存储器读出的一条指令或一个数据字;反之,当向内存存入一条指令或一个数据字时,也暂时将它们存放在数据缓冲寄存器中。
在通信协议中,主要实现了双向数据缓冲器、数据移位寄存器、时钟控制电路以及奇偶校验等功能。
The protocol realized some functions, such as two-way data buffer, shift register, clock circuit and parity check.
之后,驾驶员命令设备来完成其工作(通过操纵其寄存器)和直接在设备传送输出数据在存储器中分配的缓冲区。
Then the driver commands the device to do its job (by manipulating its registers) and the device transfers output data directly to the allocated buffer in the memory.
数据可能在寄存器,处理器缓冲区和主内存中以不同的次序移动,而不是按照程序指定的顺序。
Data may be moved between registers, processor caches, and main memory in different order than specified by the program.
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