Why we like abstraction

Posted by cadet1620 on Nov 16, 2010; 11:40pm
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Why-we-like-abstraction-tp1914023.html

On a whim a couple nights ago I implemented the ALU using nothing but Nand gates. One pot of coffee and 466 gates later, at 3:30 in the morning, I have a working ALU.

New and improved: Koen found a couple optimizations I missed. The ALU is now down to 440 Nand gates.

Here's the schematic on 3 size C sheets: ALU-440-Armbrust-Simons-2.1.pdf

Cheers!
--Mark

WOW! See this post by dgramsey for a 403 Nand ALU.