From 02701e48d9c2f2fe4e0b706b68eb859707e87293 Mon Sep 17 00:00:00 2001
From: mtabachenko <mtabachenko@users.sf.net>
Date: Thu, 28 Nov 2013 14:40:14 +0000
Subject: [PATCH] the BIAS register set to 0x200 on fake boot.

---
 desmume/src/NDSSystem.cpp | 2 +-
 desmume/src/SPU.cpp       | 6 +++++-
 desmume/src/SPU.h         | 2 +-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/desmume/src/NDSSystem.cpp b/desmume/src/NDSSystem.cpp
index 7ef8501b5..4fdf9c7e8 100644
--- a/desmume/src/NDSSystem.cpp
+++ b/desmume/src/NDSSystem.cpp
@@ -2394,7 +2394,7 @@ void NDS_Reset()
 	memcpy(FW_Mac, (MMU.fw.data + 0x36), 6);
 
 	SPU_DeInit();
-	SPU_ReInit();
+	SPU_ReInit(!canBootFromFirmware && bootResult);
 
 	//this needs to happen last, pretty much, since it establishes the correct scheduling state based on all of the above initialization
 	initSchedule();
diff --git a/desmume/src/SPU.cpp b/desmume/src/SPU.cpp
index 996f21866..cd98a7255 100644
--- a/desmume/src/SPU.cpp
+++ b/desmume/src/SPU.cpp
@@ -184,9 +184,13 @@ SoundInterface_struct *SPU_SoundCore()
 	return SNDCore;
 }
 
-void SPU_ReInit()
+void SPU_ReInit(bool fakeBoot)
 {
 	SPU_Init(SNDCoreId, buffersize);
+
+	// Firmware set BIAS to 0x200
+	if (fakeBoot)
+		SPU_WriteWord(0x04000504, 0x0200);
 }
 
 int SPU_Init(int coreid, int buffersize)
diff --git a/desmume/src/SPU.h b/desmume/src/SPU.h
index df43ac3e5..e398fbc0e 100644
--- a/desmume/src/SPU.h
+++ b/desmume/src/SPU.h
@@ -194,7 +194,7 @@ public:
 int SPU_ChangeSoundCore(int coreid, int buffersize);
 SoundInterface_struct *SPU_SoundCore();
 
-void SPU_ReInit();
+void SPU_ReInit(bool fakeBoot = false);
 int SPU_Init(int coreid, int buffersize);
 void SPU_Pause(int pause);
 void SPU_SetVolume(int volume);