What would be the maximum possible size of a computer's instruction see, if it were based on a processor with a (a) 4-bit. (b) 8-bit, and (c) 16-bit word size?

The maximum size of the computer instruction set is equal to 2w, where w is the word size in bits. Therefore, the maximum size of the instruction sets would be  (a) 4, (b) 8 and (c) 16 :

The direct addressing capacity of a processor is found by calculating 2^A where A is the address width. Indirect addressing capacity is found by calculating 22^A Therefore,

(a) 2^A = 16  instructions                                             

(b) 2⁸ = 256    instructions                                                 

(c) 2¹⁶ = 65536  instructions                                           

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