From fa2a4a27fc18dc622cb60d4b608c7e5eccd1d4e8 Mon Sep 17 00:00:00 2001
From: qeed <qeed@users.sf.net>
Date: Fri, 12 Jun 2009 14:27:50 +0000
Subject: [PATCH] IRQ inhibit fix for 0x4017

---
 src/sound.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/sound.cpp b/src/sound.cpp
index 53930a3f..289c7571 100644
--- a/src/sound.cpp
+++ b/src/sound.cpp
@@ -973,8 +973,12 @@ DECLFW(Write_IRQFM)
   FrameSoundUpdate();
  fcnt=1;
  fhcnt=fhinc;
- X6502_IRQEnd(FCEU_IQFCOUNT);
- SIRQStat&=~0x40;
+ //X6502_IRQEnd(FCEU_IQFCOUNT);
+ if (V & 0x1)
+ {
+	 X6502_IRQEnd(FCEU_IQFCOUNT);
+ 	SIRQStat&=~0x40;
+ }
  IRQFrameMode=V;
 }