Well the book does reserve 4 codes assuming that V is connected with X and Y
so that their outputs grounded if all inputs are low. I think its more
efficient too since it completely eliminates the need for one of the inputs
in X's and Y's gates.

On 4/29/08, Robert Dick <dickrp@northwestern.edu> wrote:
>
> Jared Jenkins:
>
> > For problem 14, the question says that we need to reserve a code for
> when
> > (i2,i1,i0) = (0,0,0). Does that mean we can't use a control output V
> like
> > in the book (pg 129 and 131 4th edition) that is 0 if and only if all
> > inputs are zero?
>
>
> Does the book essentially reserve 4 codes? Which approach will result in
> a
> more efficient implementation?
>
>
> -Robert Dick-
>
>

-- 
Jared Michael Jenkins
Northwestern University
McCormick School of Engineering and Applied Science
Web Development and IT Support Services
Mobile: 949.290.3737