diff --git a/source/MockingboardCardManager.cpp b/source/MockingboardCardManager.cpp
index e2e8e899..f139a560 100644
--- a/source/MockingboardCardManager.cpp
+++ b/source/MockingboardCardManager.cpp
@@ -42,7 +42,13 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 bool MockingboardCardManager::IsMockingboard(UINT slot)
 {
 	SS_CARDTYPE type = GetCardMgr().QuerySlot(slot);
-	return type == CT_MockingboardC || type == CT_Phasor || type == CT_MegaAudio || type == CT_SDMusic;
+	return type == CT_MockingboardC || type == CT_Phasor || IsMockingboardExtraCardType(slot);
+}
+
+bool MockingboardCardManager::IsMockingboardExtraCardType(UINT slot)
+{
+	SS_CARDTYPE type = GetCardMgr().QuerySlot(slot);
+	return type == CT_MegaAudio || type == CT_SDMusic;
 }
 
 void MockingboardCardManager::ReinitializeClock(void)
@@ -162,6 +168,20 @@ void MockingboardCardManager::SetVolume(DWORD volume, DWORD volumeMax)
 	}
 }
 
+bool MockingboardCardManager::GetEnableExtraCardTypes(void)
+{
+	// Scan slots for any extra card types
+	// . eg. maybe started a new AppleWin (with empty cmd line), but with Registry's slot 4 = CT_MegaAudio
+	// Otherwise, Config->Sound will show slot as "Unavailable"
+	for (UINT i = SLOT0; i < NUM_SLOTS; i++)
+	{
+		if (IsMockingboardExtraCardType(i))
+			return true;
+	}
+
+	return m_enableExtraCardTypes;
+}
+
 #ifdef _DEBUG
 void MockingboardCardManager::CheckCumulativeCycles(void)
 {
diff --git a/source/MockingboardCardManager.h b/source/MockingboardCardManager.h
index 0b373698..e76abd97 100644
--- a/source/MockingboardCardManager.h
+++ b/source/MockingboardCardManager.h
@@ -33,7 +33,7 @@ public:
 	void SetVolume(DWORD volume, DWORD volumeMax);
 	void OutputToRiff(void) { m_outputToRiff = true; }
 	void SetEnableExtraCardTypes(bool enable) { m_enableExtraCardTypes = enable; }
-	bool GetEnableExtraCardTypes(void) { return m_enableExtraCardTypes; }
+	bool GetEnableExtraCardTypes(void);
 
 	void Destroy(void);
 	void Reset(const bool powerCycle)
@@ -52,6 +52,7 @@ private:
 	bool Init(void);
 	UINT GenerateAllSoundData(void);
 	void MixAllAndCopyToRingBuffer(UINT nNumSamples);
+	bool IsMockingboardExtraCardType(UINT slot);
 
 	static const unsigned short NUM_MB_CHANNELS = 2;
 	static const DWORD SOUNDBUFFER_SIZE = MAX_SAMPLES * sizeof(short) * NUM_MB_CHANNELS;