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Computer Hardware - Engineering

Q1:

What is the i/o address for com1?

A 3e8

B 3bc

C 5f8

D 3f8

E 008

ANS:D - 3f8

At the hardware level, each serial port uses a block of eight I/O addresses, and is identified by the base address of the block.

For example, a serial port that resides at addresses (3F8 hex to 3FF hex) , is simply referred to as a serial port at 3F8.