Instructions related to accessing I/O devices are typically privileged instructions, that is, they can be executed in

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Instructions related to accessing I/O devices are typically privileged instructions, that is, they can be executed in kernel mode but not in user mode. Give a reason why these instructions are privileged.
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Modern Operating Systems

ISBN: 978-0133591620

4th edition

Authors: Andrew S. Tanenbaum, Herbert Bos

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