Re: Why we like abstraction

Posted by cadet1620 on Oct 21, 2012; 1:21am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Why-we-like-abstraction-tp1914023p4025367.html

Awesome job by Koen

While fixing the AND bug he figured out how to apply one of my tricks to the X and Y input channels, reducing each to a single Mux (4 Nands). He also saw that it's much cheaper to detect -1 with Ands than to detect 0 with Ors.

The net result is an ALU with 441 Nands! Proving yet again that two minds are better than one.

I'll get the original schematic updated in a couple days.

--Mark