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The CPU has a set of built-in operations (its instruction set) that is far richer than with the Turing machine, including the arithmetic, logic, interrupt facilities, and memory access:
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devices: adders , subtractors , comparators , multipliers , dividers , multiplexers , decoders , and so on.
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ability to branch to another part of a program, if the binary integer in some register is equal to zero (conditional branch),
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stack operations, etc.
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The CPU can interpret the contents of memory either as instructions or as data according to the fetch-execute cycle.
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The von Neumann Machine:
