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COM 4 uses which I/O port?

  • A.2F8H
  • B.3F8H
  • C.3E8H
  • D.2E8H

Answer: D

Correct answer: 2E8H

The standard serial addresses are COM1 at 3F8, COM2 at 2F8, COM3 at 3E8 and COM4 at 2E8.

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