From 59f8eeb05a8b13272e10ea04bd534cedcd45fa25 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Mon, 25 Jun 2018 20:48:24 -0400
Subject: [PATCH] Ensures the AY goes high impedance when not in read mode.

---
 Components/AY38910/AY38910.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Components/AY38910/AY38910.cpp b/Components/AY38910/AY38910.cpp
index f02942449..fc8e8644e 100644
--- a/Components/AY38910/AY38910.cpp
+++ b/Components/AY38910/AY38910.cpp
@@ -276,8 +276,9 @@ void AY38910::set_control_lines(ControlLines control_lines) {
 }
 
 void AY38910::update_bus() {
+	data_output_ = 0xff;
 	switch(control_state_) {
-		default: break;
+		default: 			break;
 		case LatchAddress:	select_register(data_input_);			break;
 		case Write:			set_register_value(data_input_);		break;
 		case Read:			data_output_ = get_register_value();	break;