Sunday, April 3, 2016

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



(a) 2A = 16  instructions                                             

(b) 28 = 256    instructions                                                 

(c) 216 = 65536  instructions                                           
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