From 798cdba9797e918f92d9987fbe04f663b9772c07 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Sun, 10 Dec 2017 17:55:37 -0500
Subject: [PATCH] 8255: update_outputs now affects only those ports designated
 as outputs.

---
 Components/8255/i8255.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Components/8255/i8255.hpp b/Components/8255/i8255.hpp
index d5ec91de9..1a25e8196 100644
--- a/Components/8255/i8255.hpp
+++ b/Components/8255/i8255.hpp
@@ -76,8 +76,8 @@ template <class T> class i8255 {
 
 	private:
 		void update_outputs() {
-			port_handler_.set_value(0, outputs_[0]);
-			port_handler_.set_value(1, outputs_[1]);
+			if(!(control_ & 0x10)) port_handler_.set_value(0, outputs_[0]);
+			if(!(control_ & 0x02)) port_handler_.set_value(1, outputs_[1]);
 			port_handler_.set_value(2, outputs_[2]);
 		}