Intel微处理器

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• 基本输入设备是一组三态缓冲器，基本输出设备是一组数据锁存器。 “输入”是指数据从I/O设备到微处理器的过程 “输出”是指处理器到I/O设备的过程。 (查看原文)

  苏打草莓 1 回复 1赞 2013-11-27 20:09:50

• Register indirect addressing allows data to be addressed at any memory location through an offset address held in any of the following registers: BP, BX, DI, and SI. For example, if register BX con- tains 1000H and the MOV AX,[BX] instruction executes, the word contents of data segment offset address 1000H are copied into register AX. If the microprocessor is operated in the real mode and DS = 0100H, this instruction addresses a word stored at memory bytes 2000H and 2001H, and transfers it into register AX (查看原文)

  苏打草莓 2013-11-17 21:02:13

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