Instruction Cycle - Initiating The Cycle

Initiating The Cycle

The cycle starts immediately when power is applied to the system using an initial PC value that is predefined for the system architecture (in Intel IA-32 CPUs, for instance, the predefined PC value is 0xfffffff0). Typically this address points to instructions in a read-only memory (ROM) which begin the process of loading the operating system. (That loading process is called booting.)

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Famous quotes containing the word cycle:

    “The Buddha, the Godhead, resides quite as comfortably in the circuits of a digital computer or the gears of a cycle transmission as he does at the top of a mountain or in the petals of a flower.”
    —Robert M. Pirsig (b. 1928)