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Program Execution (プログラム実行)

Computers execute programs using the ``Fetch-Execute Process'' (フェッチ・実行サイクル). The fetch execute process is shown in Figure 1.7. Each instruction is fetched from main memory and then executed.


  
Figure 1.7: The fetch-execute process
\includegraphics[width=12cm]{/home/david/courses/comparch/lectures/intro/figs/fetchex.eps}

PC = program counter (プログラム・カウンタ)

IR = instruction register (命令レジスタ)



David Asano
2001-05-29