Computer System, Computer Science, Hardware.
the program counter (PC). At any point in time, the PC points at (contains the address of) some machine-language instruction in main memory. 中央处理单元（CPU），是解释、执行存储在主存中指令的引擎。包含一个Program Counter来保存执行指令位置的地址信息。执行完PC指向的指令后更新PC指向下一条指令的地址。 There are only a few of these simple operations, and they revolve