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Microprocessors & Microcontrollers8086 Numerical

The 8086 has a 20-bit physical address bus. How many unique byte addresses can it represent?

  • A65536
  • B262144
  • C524288
  • D1048576
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Correct Answer: D. 1048576
Explanation: A 20-bit address has 2^20=1,048,576 distinct combinations, corresponding to 1 MiB of byte-addressable space.
Reference: Standard microprocessors and microcontrollers: 8086 numerical
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