Microprocessor Fundamentals

Q1: I/O mapped systems identify their input/output devices by giving them a(n) ________.

A 8-bit buffer number

B 8-bit port number

C 8-bit instruction

D 16-bit port number

ANS:A - 8-bit port number

In memory mapped I/O the addresses of I/O ports are of 16 bits. And in I/O mapped I/O scheme the address of I/O ports is of 8 bits.

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