rearranged the dir for github

- removed tools and pdfs
- rearranged the projects dirs
- added md files
- other minor changes

1 files changed, 0 insertions, 25 deletions

diff --git a/projects/demo/Xor.hdl b/projects/demo/Xor.hdl
deleted file mode 100644
index db49351..0000000
--- a/projects/demo/Xor.hdl
+++ /dev/null
@@ -1,25 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/demo/Xor.hdl

-

-/**

- *  Exclusive-or gate: true if either a is true and b is false, or

- *  a is false and b is true; false otherwise.

- *  QUESTION: how can the simulator execute this program properly without

- *  HDL implementations of the underlying Not, And, and Or chip-parts?

- *  Answer: since the demo folder contains no Not.hdl, And.hdl and Or.hdl

- *  files, the simulator reverts to using their built-in implementations.

- */

-

-CHIP Xor {

-    IN a, b;

-    OUT out;

-

-    PARTS:

-    Not (in=a, out=nota);

-    Not (in=b, out=notb);

-    And (a=a, b=notb, out=x);

-    And (a=nota, b=b, out=y);

-    Or (a=x, b=y, out=out);

-}
\ No newline at end of file