diff --git a/Core/BaseMapper.cpp b/Core/BaseMapper.cpp
index ddb94efa..32208c9d 100644
--- a/Core/BaseMapper.cpp
+++ b/Core/BaseMapper.cpp
@@ -783,6 +783,7 @@ uint8_t BaseMapper::DebugReadRAM(uint16_t addr)
 void BaseMapper::WriteRAM(uint16_t addr, uint8_t value)
 {
 	if((addr == 0x4016) & (_console->GetCpu()->GetCycleCount() % 2 == 1)){ WriteEPSM(addr, value); }
+	if ((addr >= 0x401c && addr <= 0x401f)) { WriteEPSM(addr, value); }
 	if(_isWriteRegisterAddr[addr]) {
 		if(_hasBusConflicts) {
 			uint8_t prgValue = _prgPages[addr >> 8][(uint8_t)addr];
diff --git a/Core/EPSMAudio.h b/Core/EPSMAudio.h
index 0d3fdef3..29ec59cc 100644
--- a/Core/EPSMAudio.h
+++ b/Core/EPSMAudio.h
@@ -177,6 +177,10 @@ public:
 				WriteToChip(a04016 | (a14016 << 1), writeValue);
 			}
 		}
+		if (addr == 0x401c) { addr = 0xC000; }
+		if (addr == 0x401d) { addr = 0xE000; }
+		if (addr == 0x401e) { addr = 0xC002; }
+		if (addr == 0x401f) { addr = 0xE002; }
 
 		switch(addr) {
 			case 0xC000:
diff --git a/Core/MemoryManager.cpp b/Core/MemoryManager.cpp
index c5907390..ce330890 100644
--- a/Core/MemoryManager.cpp
+++ b/Core/MemoryManager.cpp
@@ -133,7 +133,7 @@ void MemoryManager::Write(uint16_t addr, uint8_t value, MemoryOperationType oper
 {
 	if(_console->DebugProcessRamOperation(operationType, addr, value)) {
 		_ramWriteHandlers[addr]->WriteRAM(addr, value);
-		if (addr == 0x4016) {
+		if ((addr == 0x4016) | (addr >= 0x401c && addr <= 0x401f)) {
 			_ramWriteHandlers[0xE000]->WriteRAM(addr, value);
 		}
 	}
diff --git a/Core/NsfLoader.cpp b/Core/NsfLoader.cpp
index b0993fd5..4468c3b4 100644
--- a/Core/NsfLoader.cpp
+++ b/Core/NsfLoader.cpp
@@ -90,6 +90,9 @@ void NsfLoader::InitializeFromHeader(RomData &romData)
 	if (header.SoundChips & 0x20) {
 		chips.push_back("Sunsoft 5B");
 	}
+	if (header.SoundChips & 0x40) {
+		chips.push_back("VT02");
+	}
 	if (header.SoundChips & 0x80) {
 		chips.push_back("EPSM");
 	}
diff --git a/Core/NsfMapper.cpp b/Core/NsfMapper.cpp
index eb42ac5f..1f9f2b13 100644
--- a/Core/NsfMapper.cpp
+++ b/Core/NsfMapper.cpp
@@ -111,7 +111,7 @@ void NsfMapper::InitMapper(RomData& romData)
 
 	if(_nsfHeader.SoundChips & NsfSoundChips::EPSM) {
 		AddRegisterRange(0x4016, 0x4016, MemoryOperation::Write);
-		AddRegisterRange(0xC000, 0xFFFF, MemoryOperation::Write);
+		AddRegisterRange(0x401c, 0x401f, MemoryOperation::Write);
 	}
 }
 
@@ -360,7 +360,7 @@ void NsfMapper::WriteRegister(uint16_t addr, uint8_t value)
 	} else if((_nsfHeader.SoundChips & NsfSoundChips::Sunsoft) && addr >= 0xC000 && addr <= 0xFFFF) {
 		_sunsoftAudio->WriteRegister(addr, value);
 	}
-		else if ((_nsfHeader.SoundChips & NsfSoundChips::EPSM) && addr >= 0xC000 && addr <= 0xFFFF) {
+		else if ((_nsfHeader.SoundChips & NsfSoundChips::EPSM) && addr >= 0x401C && addr <= 0x401F) {
 		_epsmAudio->WriteRegister(addr, value);
 	}
 	else {
@@ -495,11 +495,11 @@ void NsfMapper::StreamState(bool saving)
 	SnapshotInfo fdsAudio { _fdsAudio.get() };
 	SnapshotInfo namcoAudio { _namcoAudio.get() };
 	SnapshotInfo sunsoftAudio { _sunsoftAudio.get() };
-	SnapshotInfo epsmAudio{ _epsmAudio.get() };
+	SnapshotInfo epsgAudio{ _epsmAudio.get() };
 
 	Stream(
 		_model, _needInit, _irqEnabled, _irqReloadValue, _irqCounter, _irqStatus, _debugIrqStatus, _mmc5MultiplierValues[0], _mmc5MultiplierValues[1],
 		_trackEndCounter, _trackFadeCounter, _fadeLength, _silenceDetectDelay, _trackEnded, _allowSilenceDetection, _hasBankSwitching, _ntscSpeed,
-		_palSpeed, _dendySpeed, _songNumber, mmc5Audio, vrc6Audio, vrc7Audio, fdsAudio, namcoAudio, sunsoftAudio, epsmAudio
+		_palSpeed, _dendySpeed, _songNumber, mmc5Audio, vrc6Audio, vrc7Audio, fdsAudio, namcoAudio, sunsoftAudio, epsgAudio
 	);
 }
\ No newline at end of file
diff --git a/Core/NsfMapper.h b/Core/NsfMapper.h
index 738aeb63..bfb5ea44 100644
--- a/Core/NsfMapper.h
+++ b/Core/NsfMapper.h
@@ -27,6 +27,7 @@ private:
 		MMC5 = 0x08,
 		Namco = 0x10,
 		Sunsoft = 0x20,
+		VT02 = 0x40,
 		EPSM = 0x80
 	};
 
diff --git a/GUI.NET/Controls/ctrlNsfPlayer.Designer.cs b/GUI.NET/Controls/ctrlNsfPlayer.Designer.cs
index adf2222b..6a18d768 100644
--- a/GUI.NET/Controls/ctrlNsfPlayer.Designer.cs
+++ b/GUI.NET/Controls/ctrlNsfPlayer.Designer.cs
@@ -46,7 +46,7 @@
 			this.lblSunsoft = new System.Windows.Forms.Label();
 			this.lblVrc6 = new System.Windows.Forms.Label();
 			this.lblVrc7 = new System.Windows.Forms.Label();
-			this.lblEpsg = new System.Windows.Forms.Label();
+			this.lblEpsm = new System.Windows.Forms.Label();
 			this.lblSoundChips = new System.Windows.Forms.Label();
 			this.trkVolume = new System.Windows.Forms.TrackBar();
 			this.flowLayoutPanel1 = new System.Windows.Forms.FlowLayoutPanel();
@@ -268,7 +268,7 @@
 			this.tableLayoutPanel3.Controls.Add(this.lblSunsoft, 3, 0);
 			this.tableLayoutPanel3.Controls.Add(this.lblVrc6, 4, 0);
 			this.tableLayoutPanel3.Controls.Add(this.lblVrc7, 5, 0);
-			this.tableLayoutPanel3.Controls.Add(this.lblEpsg, 6, 0);
+			this.tableLayoutPanel3.Controls.Add(this.lblEpsm, 6, 0);
 			this.tableLayoutPanel3.Dock = System.Windows.Forms.DockStyle.Fill;
 			this.tableLayoutPanel3.Location = new System.Drawing.Point(101, 66);
 			this.tableLayoutPanel3.Name = "tableLayoutPanel3";
@@ -357,18 +357,18 @@
 			this.lblVrc7.TabIndex = 3;
 			this.lblVrc7.Text = "VRC7";
 			// 
-			// lblEpsg
+			// lblEpsm
 			// 
-			this.lblEpsg.AutoSize = true;
-			this.lblEpsg.BackColor = System.Drawing.Color.Transparent;
-			this.lblEpsg.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
-			this.lblEpsg.ForeColor = System.Drawing.Color.White;
-			this.lblEpsg.Location = new System.Drawing.Point(220, 0);
-			this.lblEpsg.Margin = new System.Windows.Forms.Padding(0);
-			this.lblEpsg.Name = "lblEpsg";
-			this.lblEpsg.Size = new System.Drawing.Size(35, 13);
-			this.lblEpsg.TabIndex = 3;
-			this.lblEpsg.Text = "EPSM";
+			this.lblEpsm.AutoSize = true;
+			this.lblEpsm.BackColor = System.Drawing.Color.Transparent;
+			this.lblEpsm.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+			this.lblEpsm.ForeColor = System.Drawing.Color.White;
+			this.lblEpsm.Location = new System.Drawing.Point(220, 0);
+			this.lblEpsm.Margin = new System.Windows.Forms.Padding(0);
+			this.lblEpsm.Name = "lblEpsm";
+			this.lblEpsm.Size = new System.Drawing.Size(35, 13);
+			this.lblEpsm.TabIndex = 3;
+			this.lblEpsm.Text = "EPSM";
 			// 
 			// lblSoundChips
 			// 
@@ -743,7 +743,7 @@
 		private System.Windows.Forms.Label lblSunsoft;
 		private System.Windows.Forms.Label lblVrc6;
 		private System.Windows.Forms.Label lblVrc7;
-		private System.Windows.Forms.Label lblEpsg;
+		private System.Windows.Forms.Label lblEpsm;
 		private System.Windows.Forms.Label lblMmc5;
 		private System.Windows.Forms.Label lblNamco;
 		private System.Windows.Forms.Label lblFds;
diff --git a/GUI.NET/Controls/ctrlNsfPlayer.cs b/GUI.NET/Controls/ctrlNsfPlayer.cs
index db288cd8..bdc8f730 100644
--- a/GUI.NET/Controls/ctrlNsfPlayer.cs
+++ b/GUI.NET/Controls/ctrlNsfPlayer.cs
@@ -274,7 +274,7 @@ namespace Mesen.GUI.Controls
 					lblMmc5.ForeColor = (header.SoundChips & 0x08) == 0x08 ? Color.White : Color.Gray;
 					lblNamco.ForeColor = (header.SoundChips & 0x10) == 0x10 ? Color.White : Color.Gray;
 					lblSunsoft.ForeColor = (header.SoundChips & 0x20) == 0x20 ? Color.White : Color.Gray;
-					lblEpsg.ForeColor = (header.SoundChips & 0x40) == 0x40 ? Color.White : Color.Gray;
+					lblEpsm.ForeColor = (header.SoundChips & 0x80) == 0x80 ? Color.White : Color.Gray;
 
 					if (InteropEmu.IsPaused()) {
 						btnPause.Image = Properties.Resources.Play;