Re: Incrementer Troubles

Posted by cadet1620 on Oct 08, 2014; 10:58am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Incrementer-Troubles-tp4028408p4028409.html

You have two separate Add16 chips in your incrementer.

The first Add16 adds 1 to input bit 0 to produce output bit 0. (This is effectively a Not.)
The second Add16 adds 0 to the remaining bits. There is no carry from the bit 0 addition into this addition, so nothing changes.

You need to do this with a single Add16. Look at the example in Appendix A.5.3.

--Mark