A digital computer has a common bus system for 16 register of 32 bits each. The bus is constructed using multiplexers.

 

4.6 - A digital computer has a common bus system

 for 16 register of 32 bits each. The bus is 

constructed using multiplexers.

a.     How many selection inputs are there in each multiplexer?

b.    What size of multiplexers are needed?

c.     How many multiplexers are there in bus?

ANS:

      a)     4 selection lines to select one of 16 registers. 

      b)     16 × 1 multiplexers.

     c)     32 multiplexers, one for each bit of the registers.