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On the 16-bit ISA bus, IRQ2 is elevated to which higher level interrupt?

  • A.9
  • B.11
  • C.13
  • D.15

Answer: A

Correct answer: 9

On the 16-bit ISA bus the second interrupt controller is cascaded through IRQ2, so a device requesting IRQ2 is actually serviced as IRQ9. The two are the same line seen from either side.

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