diff options
| author | Yuchen Pei <me@ypei.me> | 2017-11-29 12:30:41 +0100 |
|---|---|---|
| committer | Yuchen Pei <me@ypei.me> | 2017-11-29 12:30:41 +0100 |
| commit | a000308104aab27c2dde9a306f1bc654b2db4806 (patch) | |
| tree | aecc628e14c1628b5714281437aba18680cdc27b /projects/demo | |
first commit
Diffstat (limited to 'projects/demo')
| -rw-r--r-- | projects/demo/Xor.cmp | 5 | ||||
| -rw-r--r-- | projects/demo/Xor.hdl | 25 | ||||
| -rw-r--r-- | projects/demo/Xor.out | 0 | ||||
| -rw-r--r-- | projects/demo/Xor.tst | 29 |
4 files changed, 59 insertions, 0 deletions
diff --git a/projects/demo/Xor.cmp b/projects/demo/Xor.cmp new file mode 100644 index 0000000..a1e07b2 --- /dev/null +++ b/projects/demo/Xor.cmp @@ -0,0 +1,5 @@ +| a | b | out |
+| 0 | 0 | 0 |
+| 0 | 1 | 1 |
+| 1 | 0 | 1 |
+| 1 | 1 | 0 |
diff --git a/projects/demo/Xor.hdl b/projects/demo/Xor.hdl new file mode 100644 index 0000000..db49351 --- /dev/null +++ b/projects/demo/Xor.hdl @@ -0,0 +1,25 @@ +// 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 diff --git a/projects/demo/Xor.out b/projects/demo/Xor.out new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/projects/demo/Xor.out diff --git a/projects/demo/Xor.tst b/projects/demo/Xor.tst new file mode 100644 index 0000000..658cbe5 --- /dev/null +++ b/projects/demo/Xor.tst @@ -0,0 +1,29 @@ +// 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/01/Xor.tst
+
+load Xor.hdl,
+output-file Xor.out,
+compare-to Xor.cmp,
+output-list a%B3.1.3 b%B3.1.3 out%B3.1.3;
+
+set a 0,
+set b 0,
+eval,
+output;
+
+set a 0,
+set b 1,
+eval,
+output;
+
+set a 1,
+set b 0,
+eval,
+output;
+
+set a 1,
+set b 1,
+eval,
+output;
|