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Real mode

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Real mode denotes a way of operating Intel microprocessors. It means that only 1MB of memory can be addressed. The PC computer execute the first steps in this mode when booting. DOS operates in this mode. The advantage of using the real mode is that the BIOS routines may be used.

Real mode is the only mode 8086 processors operate in. Protected mode is a more powerful operation mode.

Read on: IA-32

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