Discuss why I/O controllers are used to interface I/O devices to the system. For each address below, state whether a 32-bit value stored at that address is aligned or not (all numbers are in hex):...

Discuss why I/O controllers are used to interface I/O devices to the system.

For each address below, state whether a 32-bit value stored at that address is aligned or

not (all numbers are in hex):

(a) 12345678 (c) 9128ADCC

(b) ABCD755A (d) 38B0F050