From ee8d853fcb0d6d49a62a0f040021bd85cc107d3d Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Wed, 17 Jul 2019 14:20:27 -0400
Subject: [PATCH] Ensures you can't get a phase 2 for free with `run_for(0)`.

---
 Components/6522/Implementation/6522Implementation.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Components/6522/Implementation/6522Implementation.hpp b/Components/6522/Implementation/6522Implementation.hpp
index 296d83e87..9b6f5118e 100644
--- a/Components/6522/Implementation/6522Implementation.hpp
+++ b/Components/6522/Implementation/6522Implementation.hpp
@@ -347,6 +347,7 @@ template <typename T> void MOS6522<T>::do_phase1() {
 /*! Runs for a specified number of half cycles. */
 template <typename T> void MOS6522<T>::run_for(const HalfCycles half_cycles) {
 	int number_of_half_cycles = half_cycles.as_int();
+	if(!number_of_half_cycles) return;
 
 	if(is_phase2_) {
 		do_phase2();