rearranged the dir for github

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

1 files changed, 32 insertions, 0 deletions

diff --git a/chips/PC.hdl b/chips/PC.hdl
new file mode 100644
index 0000000..aba68d1
--- /dev/null
+++ b/chips/PC.hdl
@@ -0,0 +1,32 @@
+// 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/03/a/PC.hdl

+

+/**

+ * A 16-bit counter with load and reset control bits.

+ * if      (reset[t] == 1) out[t+1] = 0

+ * else if (load[t] == 1)  out[t+1] = in[t]

+ * else if (inc[t] == 1)   out[t+1] = out[t] + 1  (integer addition)

+ * else                    out[t+1] = out[t]

+ */

+

+CHIP PC {

+    IN in[16],load,inc,reset;

+    OUT out[16];

+

+    PARTS:

+    // Put your code here:

+    Mux16 (a=out5, b=in, sel=load, out=out0);

+    Inc16 (in=out0, out=out1);

+    Mux16 (a=out1, b=out0, sel=load, out=out2);

+    Mux16 (a=out0, b=out2, sel=inc, out=out3);

+    Mux16 (a=out3, b=false, sel=reset, out=out4);

+    Register (in=out4, load=true, out=out5, out=out);

+

+    //Inc16 (in=out4, out=out0);

+    //Mux16 (a=out4, b=out0, sel=inc, out=out1);

+    //Mux16 (a=out1, b=in, sel=load, out=out2);

+    //Mux16 (a=out2, b=false, sel=reset, out=out3);

+    //Register (in=out3, load=true, out=out4, out=out);

+}