From 3830ccca27a11cfb8e076f9a1dc0689d5b0c5b12 Mon Sep 17 00:00:00 2001
From: Matthias Endler <matthias-endler@gmx.net>
Date: Wed, 7 Apr 2021 14:01:45 +0200
Subject: [PATCH] Add comments

---
 README.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2c4e46a..a9ccc21 100644
--- a/README.md
+++ b/README.md
@@ -9,11 +9,12 @@ It builds on stable Rust and supports `#[no_std]` targets.
 ## Usage example
 
 ```rust
-extern crate mos6502;
 use mos6502::address::Address;
 use mos6502::cpu;
 
 fn main() {
+    // Calculate the greatest common divisor of 56 and 49
+    // using Euclid's algorithm.
     let zero_page_data = [56, 49];
 
     let program = [
@@ -46,6 +47,7 @@ fn main() {
 
     cpu.run();
 
+    // The expected GCD is 7
     assert_eq!(7, cpu.registers.accumulator);
 }
 ```