diff --git a/src/common/Settings.cpp b/src/common/Settings.cpp
index 0a36f8662..0faa84d7f 100644
--- a/src/common/Settings.cpp
+++ b/src/common/Settings.cpp
@@ -148,6 +148,8 @@ static struct {
 	const char* type = "Type";
 	const char* device = "DeviceName";
 	const char* config = "ProfileName";
+	const char *top_slot = "TopSlot";
+	const char *bottom_slot = "BottomSlot";
 } sect_input_port;
 
 static const char* section_input_profiles = "input-profile-";
@@ -465,15 +467,25 @@ bool Settings::LoadConfig()
 	// ==== Input Port Begin ====
 
 	for (int port_num = 0; port_num < 4; port_num++) {
+		m_input_port[port_num].Type = to_underlying(XBOX_INPUT_DEVICE::DEVICE_INVALID);
+		m_input_port[port_num].TopSlotType = to_underlying(XBOX_INPUT_DEVICE::DEVICE_INVALID);
+		m_input_port[port_num].BottomSlotType = to_underlying(XBOX_INPUT_DEVICE::DEVICE_INVALID);
+
 		std::string current_section = std::string(section_input_port) + std::to_string(port_num);
 		int ret = m_si.GetLongValue(current_section.c_str(), sect_input_port.type, -2);
 		if (ret == -2) {
-			m_input_port[port_num].Type = to_underlying(XBOX_INPUT_DEVICE::DEVICE_INVALID);
 			continue;
 		}
 		m_input_port[port_num].Type = ret;
 		m_input_port[port_num].DeviceName = m_si.GetValue(current_section.c_str(), sect_input_port.device);
 		m_input_port[port_num].ProfileName = TrimQuoteFromString(m_si.GetValue(current_section.c_str(), sect_input_port.config));
+		ret = m_si.GetLongValue(current_section.c_str(), sect_input_port.top_slot, -2);
+		if (ret == -2) {
+			continue;
+		}
+		m_input_port[port_num].TopSlotType = ret;
+		m_input_port[port_num].BottomSlotType = m_si.GetLongValue(current_section.c_str(), sect_input_port.bottom_slot, -2);
+		assert(m_input_port[port_num].BottomSlotType != -2);
 	}
 
 	// ==== Input Port End ==============
@@ -644,6 +656,8 @@ bool Settings::Save(std::string file_path)
 		m_si.SetLongValue(current_section.c_str(), sect_input_port.type, m_input_port[port_num].Type, nullptr, false, true);
 		m_si.SetValue(current_section.c_str(), sect_input_port.device, m_input_port[port_num].DeviceName.c_str(), nullptr, true);
 		m_si.SetValue(current_section.c_str(), sect_input_port.config, quoted_prf_str.c_str(), nullptr, true);
+		m_si.SetLongValue(current_section.c_str(), sect_input_port.top_slot, m_input_port[port_num].TopSlotType, nullptr, false, true);
+		m_si.SetLongValue(current_section.c_str(), sect_input_port.bottom_slot, m_input_port[port_num].BottomSlotType, nullptr, false, true);
 	}
 
 	// ==== Input Port End ==============
diff --git a/src/common/Settings.hpp b/src/common/Settings.hpp
index 000ff615d..0d3da1b73 100644
--- a/src/common/Settings.hpp
+++ b/src/common/Settings.hpp
@@ -149,6 +149,8 @@ public:
 		int Type;
 		std::string DeviceName;
 		std::string ProfileName;
+		int TopSlotType;
+		int BottomSlotType;
 	};
 	std::array<s_input_port, 4> m_input_port;
 
diff --git a/src/core/kernel/init/CxbxKrnl.cpp b/src/core/kernel/init/CxbxKrnl.cpp
index 6babf23c0..00111d56a 100644
--- a/src/core/kernel/init/CxbxKrnl.cpp
+++ b/src/core/kernel/init/CxbxKrnl.cpp
@@ -96,6 +96,7 @@ char szFilePath_EEPROM_bin[MAX_PATH] = { 0 };
 char szFilePath_Xbe[xbox::max_path*2] = { 0 }; // NOTE: LAUNCH_DATA_HEADER's szLaunchPath is xbox::max_path*2 = 520
 
 std::string CxbxBasePath;
+std::string MuBasePath;
 HANDLE CxbxBasePathHandle;
 Xbe* CxbxKrnl_Xbe = NULL;
 bool g_bIsChihiro = false;
@@ -1433,11 +1434,14 @@ __declspec(noreturn) void CxbxKrnlInit
 		char szBuffer[sizeof(szFilePath_Xbe)];
 		g_EmuShared->GetStorageLocation(szBuffer);
 
+		MuBasePath = std::string(szBuffer) + "\\EmuMu";
 		CxbxBasePath = std::string(szBuffer) + "\\EmuDisk";
 		CxbxResolveHostToFullPath(CxbxBasePath, "Cxbx-Reloaded's EmuDisk directory");
+		CxbxResolveHostToFullPath(MuBasePath, "Cxbx-Reloaded's EmuMu directory");
 		// Since canonical always remove the extra slash, we need to manually add it back.
 		// TODO: Once CxbxBasePath is filesystem::path, replace CxbxBasePath's + operators to / for include path separator internally.
 		CxbxBasePath = std::filesystem::path(CxbxBasePath).append("").string();
+		MuBasePath = std::filesystem::path(MuBasePath).append("").string();
 	}
 
 	// Determine xbe path
@@ -1505,6 +1509,17 @@ __declspec(noreturn) void CxbxKrnlInit
 	CxbxRegisterDeviceHostPath(DeviceHarddisk0Partition7, CxbxBasePath + "Partition7");
 	CxbxRegisterDeviceHostPath(DevicePrefix + "\\Chihiro", CxbxBasePath + "Chihiro");
 
+	// Create MU directories
+	for (unsigned i = 0; i < 8; ++i) {
+		std::error_code error;
+		static char mu_letter = 'F';
+		std::string mu_path = MuBasePath + mu_letter;
+		if (!(std::filesystem::exists(mu_path) || std::filesystem::create_directory(mu_path, error))) {
+			CxbxKrnlCleanup("Failed to create memory unit directories");
+		}
+		++mu_letter;
+	}
+
 	// Create default symbolic links :
 	EmuLogInit(LOG_LEVEL::DEBUG, "Creating default symbolic links.");
 	{
@@ -1747,6 +1762,13 @@ void CxbxInitFilePaths()
 		CxbxKrnlCleanup("%s : Couldn't create Cxbx-Reloaded EmuDisk folder!", __func__);
 	}
 
+	// Make sure the EmuDMu folder exists
+	std::string emuMu = std::string(szFolder_CxbxReloadedData) + std::string("\\EmuMu");
+	result = std::filesystem::exists(emuMu);
+	if (!result && !std::filesystem::create_directory(emuMu)) {
+		CxbxKrnlCleanup("%s : Couldn't create Cxbx-Reloaded EmuMu folder!", __func__);
+	}
+
 	snprintf(szFilePath_EEPROM_bin, MAX_PATH, "%s\\EEPROM.bin", szFolder_CxbxReloadedData);
 
 	GetModuleFileName(GetModuleHandle(nullptr), szFilePath_CxbxReloaded_Exe, MAX_PATH);
diff --git a/src/core/kernel/support/EmuFile.cpp b/src/core/kernel/support/EmuFile.cpp
index 682a0fd4f..c10e0cbb3 100644
--- a/src/core/kernel/support/EmuFile.cpp
+++ b/src/core/kernel/support/EmuFile.cpp
@@ -248,7 +248,14 @@ const std::string DriveA = DrivePrefix + "A:"; // A: could be CDROM
 const std::string DriveC = DrivePrefix + "C:"; // C: is HDD0
 const std::string DriveD = DrivePrefix + "D:"; // D: is DVD Player
 const std::string DriveE = DrivePrefix + "E:";
-const std::string DriveF = DrivePrefix + "F:";
+const std::string DriveF = DrivePrefix + "F:"; // MU port 0, slot top
+const std::string DriveG = DrivePrefix + "G:"; // MU port 0, slot bottom
+const std::string DriveH = DrivePrefix + "H:"; // MU port 1, slot top
+const std::string DriveI = DrivePrefix + "I:"; // MU port 1, slot bottom
+const std::string DriveJ = DrivePrefix + "J:"; // MU port 2, slot top
+const std::string DriveK = DrivePrefix + "K:"; // MU port 2, slot bottom
+const std::string DriveL = DrivePrefix + "L:"; // MU port 3, slot top
+const std::string DriveM = DrivePrefix + "M:"; // MU port 3, slot bottom
 const std::string DriveS = DrivePrefix + "S:";
 const std::string DriveT = DrivePrefix + "T:"; // T: is Title persistent data region
 const std::string DriveU = DrivePrefix + "U:"; // U: is User persistent data region
diff --git a/src/core/kernel/support/EmuFile.h b/src/core/kernel/support/EmuFile.h
index 81d86d6dd..33c11bf3e 100644
--- a/src/core/kernel/support/EmuFile.h
+++ b/src/core/kernel/support/EmuFile.h
@@ -62,13 +62,13 @@ extern const std::string DriveC;
 extern const std::string DriveD;
 extern const std::string DriveE;
 extern const std::string DriveF;
-extern const std::string DriveS;
-extern const std::string DriveT;
-extern const std::string DriveU;
-extern const std::string DriveV;
-extern const std::string DriveW;
-extern const std::string DriveX;
-extern const std::string DriveY;
+extern const std::string DriveG;
+extern const std::string DriveH;
+extern const std::string DriveI;
+extern const std::string DriveJ;
+extern const std::string DriveK;
+extern const std::string DriveL;
+extern const std::string DriveM;
 extern const std::string DriveZ;
 extern const std::string DevicePrefix;
 extern const std::string DeviceCdrom0;