Re: Chapter 1 efficiency considerations

Posted by goofballlogic on Jul 11, 2020; 1:29pm
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Chapter-1-efficiency-considerations-tp4034841p4034843.html

Ah ok I misunderstood page 27 where it says "the only building blocks that you can use are primitive Nand gates and the composite gates that you will gradually build on top of them".

I interpreted this to mean that the only primitive gate aviailable is the Nand gates and that all other gates were to be considered composites (so Not would only be built out of Nands).

On the same page there is mention of "efficiency considerations such as the number of elementary gates used in constructing a composite gate..." " Such considerations are critically important in practice..."

But, from what you say it sounds like the authors merely wanted any functioning solution, and I note that the example Xor hdl on page 16 uses composite gates rather than raw nand gates.

Out of interest, do you speak on behalf of the authors WBahn or are you just an interested party?