From a000308104aab27c2dde9a306f1bc654b2db4806 Mon Sep 17 00:00:00 2001
From: Yuchen Pei <me@ypei.me>
Date: Wed, 29 Nov 2017 12:30:41 +0100
Subject: first commit

---
 tools/builtInChips/HalfAdder.hdl | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 tools/builtInChips/HalfAdder.hdl

(limited to 'tools/builtInChips/HalfAdder.hdl')

diff --git a/tools/builtInChips/HalfAdder.hdl b/tools/builtInChips/HalfAdder.hdl
new file mode 100644
index 0000000..1591b96
--- /dev/null
+++ b/tools/builtInChips/HalfAdder.hdl
@@ -0,0 +1,18 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: tools/builtIn/HalfAdder.hdl
+
+/**
+ * Half adder. Computes sum, the least significnat bit of a + b,
+ * and carry, the most significnat bit of a + b.
+ */
+
+CHIP HalfAdder {
+
+    IN  a, b;
+    OUT sum,   // LSB of a + b
+        carry; // MSB of a + b
+
+    BUILTIN HalfAdder;
+}
-- 
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