Building chips problem.

Posted by GustavoB on Oct 31, 2011; 4:41pm
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Building-chips-problem-tp3468285.html

On the first chapter, they say that youre encouraged to build your own chips to use them on further projects. I could build the NAND chip using the examples from pages 16 and 282. I've noticed this:

-Appendix A comes with no description on logical functions. Isn't that needed for building the chips?
-I've built my NAND chip this way:

/* Nand gate */
CHIP Nand {
IN a, b;
OUT out;
PARTS:
And(a=a, b=b, out=c);
Not(in=c, out=out);
}

If the HDL recognize functions like and, not and xor, why build this chips?