diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0414a944b..02617f157 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -338,7 +338,7 @@ set(LOADER_SOURCE_FILES src/core/loader/elf.cpp src/core/loader/ncsd.cpp src/cor
 set(FS_SOURCE_FILES src/core/fs/archive_self_ncch.cpp src/core/fs/archive_save_data.cpp src/core/fs/archive_sdmc.cpp
                     src/core/fs/archive_ext_save_data.cpp src/core/fs/archive_ncch.cpp src/core/fs/romfs.cpp
                     src/core/fs/ivfc.cpp src/core/fs/archive_user_save_data.cpp src/core/fs/archive_system_save_data.cpp
-                    src/core/fs/archive_twl_photo.cpp src/core/fs/archive_twl_sound.cpp
+                    src/core/fs/archive_twl_photo.cpp src/core/fs/archive_twl_sound.cpp src/core/fs/archive_card_spi.cpp
 )
 
 set(APPLET_SOURCE_FILES src/core/applets/applet.cpp src/core/applets/mii_selector.cpp src/core/applets/software_keyboard.cpp src/core/applets/applet_manager.cpp
@@ -389,7 +389,7 @@ set(HEADER_FILES include/emulator.hpp include/helpers.hpp include/termcolor.hpp
                  include/align.hpp include/audio/aac_decoder.hpp include/PICA/pica_simd.hpp include/services/fonts.hpp
                  include/audio/audio_interpolation.hpp include/audio/hle_mixer.hpp include/audio/dsp_simd.hpp
                  include/services/dsp_firmware_db.hpp include/frontend_settings.hpp include/fs/archive_twl_photo.hpp
-                 include/fs/archive_twl_sound.hpp
+                 include/fs/archive_twl_sound.hpp include/fs/archive_card_spi.hpp
 )
 
 cmrc_add_resource_library(
diff --git a/include/fs/archive_base.hpp b/include/fs/archive_base.hpp
index 4c42ca021..d899d1a6e 100644
--- a/include/fs/archive_base.hpp
+++ b/include/fs/archive_base.hpp
@@ -35,6 +35,7 @@ namespace ArchiveID {
 		SDMC = 9,
 		SDMCWriteOnly = 0xA,
 
+		CardSPI = 0x12345679,
 		SavedataAndNcch = 0x2345678A,
 		// 3DBrew: This is the same as the regular SaveData archive, except with this the savedata ID and mediatype is loaded from the input archive
 		// lowpath.
diff --git a/include/fs/archive_card_spi.hpp b/include/fs/archive_card_spi.hpp
new file mode 100644
index 000000000..fefa9933f
--- /dev/null
+++ b/include/fs/archive_card_spi.hpp
@@ -0,0 +1,30 @@
+#pragma once
+#include "archive_base.hpp"
+#include "result/result.hpp"
+
+using Result::HorizonResult;
+
+class CardSPIArchive : public ArchiveBase {
+  public:
+	CardSPIArchive(Memory& mem) : ArchiveBase(mem) {}
+	std::string name() override { return "Card SPI"; }
+
+	u64 getFreeBytes() override {
+		Helpers::warn("Unimplemented GetFreeBytes for Card SPI archive");
+		return 0_MB;
+	}
+
+	HorizonResult createDirectory(const FSPath& path) override;
+	HorizonResult createFile(const FSPath& path, u64 size) override;
+	HorizonResult deleteFile(const FSPath& path) override;
+
+	Rust::Result<ArchiveBase*, HorizonResult> openArchive(const FSPath& path) override;
+	Rust::Result<DirectorySession, HorizonResult> openDirectory(const FSPath& path) override;
+
+	FileDescriptor openFile(const FSPath& path, const FilePerms& perms) override;
+
+	std::optional<u32> readFile(FileSession* file, u64 offset, u32 size, u32 dataPointer) override {
+		Helpers::panic("Unimplemented ReadFile for Card SPI archive");
+		return {};
+	};
+};
\ No newline at end of file
diff --git a/include/services/dsp.hpp b/include/services/dsp.hpp
index 7eb9b28b0..3013c94d4 100644
--- a/include/services/dsp.hpp
+++ b/include/services/dsp.hpp
@@ -44,9 +44,12 @@ class DSPService {
 	size_t totalEventCount;
 	std::vector<u8> loadedComponent;
 
+	bool headphonesInserted = true;
+
 	// Service functions
 	void convertProcessAddressFromDspDram(u32 messagePointer);  // Nice function name
 	void flushDataCache(u32 messagePointer);
+	void forceHeadphoneOut(u32 messagePointer);
 	void getHeadphoneStatus(u32 messagePointer);
 	void getSemaphoreEventHandle(u32 messagePointer);
 	void invalidateDCache(u32 messagePointer);
diff --git a/include/services/fs.hpp b/include/services/fs.hpp
index dd115cc41..82f07077a 100644
--- a/include/services/fs.hpp
+++ b/include/services/fs.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include "config.hpp"
+#include "fs/archive_card_spi.hpp"
 #include "fs/archive_ext_save_data.hpp"
 #include "fs/archive_ncch.hpp"
 #include "fs/archive_save_data.hpp"
@@ -43,6 +44,7 @@ class FSService {
 
 	TWLPhotoArchive twlPhoto;
 	TWLSoundArchive twlSound;
+	CardSPIArchive cardSpi;
 
 	ArchiveBase* getArchiveFromID(u32 id, const FSPath& archivePath);
 	Rust::Result<Handle, HorizonResult> openArchiveHandle(u32 archiveID, const FSPath& path);
@@ -92,7 +94,8 @@ class FSService {
 	FSService(Memory& mem, Kernel& kernel, const EmulatorConfig& config)
 		: mem(mem), saveData(mem), sharedExtSaveData_nand(mem, "../SharedFiles/NAND", true), extSaveData_sdmc(mem, "SDMC"), sdmc(mem),
 		  sdmcWriteOnly(mem, true), selfNcch(mem), ncch(mem), userSaveData1(mem, ArchiveID::UserSaveData1),
-		  userSaveData2(mem, ArchiveID::UserSaveData2), systemSaveData(mem), twlPhoto(mem), twlSound(mem), kernel(kernel), config(config) {}
+		  userSaveData2(mem, ArchiveID::UserSaveData2), systemSaveData(mem), twlPhoto(mem), twlSound(mem), cardSpi(mem), kernel(kernel),
+		  config(config) {}
 
 	void reset();
 	void handleSyncRequest(u32 messagePointer);
diff --git a/include/services/gsp_gpu.hpp b/include/services/gsp_gpu.hpp
index d72446097..8294565b1 100644
--- a/include/services/gsp_gpu.hpp
+++ b/include/services/gsp_gpu.hpp
@@ -1,6 +1,7 @@
 #pragma once
 #include <cstring>
 #include <optional>
+
 #include "PICA/gpu.hpp"
 #include "helpers.hpp"
 #include "kernel_types.hpp"
@@ -9,12 +10,12 @@
 #include "result/result.hpp"
 
 enum class GPUInterrupt : u8 {
-	PSC0 = 0, // Memory fill completed
-	PSC1 = 1, // ?
-	VBlank0 = 2, // ?
-	VBlank1 = 3, // ?
-	PPF = 4, // Display transfer finished
-	P3D = 5, // Command list processing finished
+	PSC0 = 0,     // Memory fill completed
+	PSC1 = 1,     // ?
+	VBlank0 = 2,  // ?
+	VBlank1 = 3,  // ?
+	PPF = 4,      // Display transfer finished
+	P3D = 5,      // Command list processing finished
 	DMA = 6
 };
 
@@ -28,8 +29,8 @@ class GPUService {
 	Memory& mem;
 	GPU& gpu;
 	Kernel& kernel;
-	u32& currentPID; // Process ID of the current process
-	u8* sharedMem; // Pointer to GSP shared memory
+	u32& currentPID;  // Process ID of the current process
+	u8* sharedMem;    // Pointer to GSP shared memory
 
 	// At any point in time only 1 process has privileges to use rendering functions
 	// This is the PID of that process
@@ -64,8 +65,8 @@ class GPUService {
 
 	// Used for saving and restoring GPU state via ImportDisplayCaptureInfo
 	struct CaptureInfo {
-		u32 leftFramebuffer; // Left framebuffer VA
-		u32 rightFramebuffer; // Right framebuffer VA (Top screen only)
+		u32 leftFramebuffer;   // Left framebuffer VA
+		u32 rightFramebuffer;  // Right framebuffer VA (Top screen only)
 		u32 format;
 		u32 stride;
 	};
@@ -74,6 +75,7 @@ class GPUService {
 	// Service commands
 	void acquireRight(u32 messagePointer);
 	void flushDataCache(u32 messagePointer);
+	void invalidateDataCache(u32 messagePointer);
 	void importDisplayCaptureInfo(u32 messagePointer);
 	void readHwRegs(u32 messagePointer);
 	void registerInterruptRelayQueue(u32 messagePointer);
@@ -108,15 +110,14 @@ class GPUService {
 	FramebufferUpdate* getTopFramebufferInfo() { return getFramebufferInfo(0); }
 	FramebufferUpdate* getBottomFramebufferInfo() { return getFramebufferInfo(1); }
 
-public:
-	GPUService(Memory& mem, GPU& gpu, Kernel& kernel, u32& currentPID) : mem(mem), gpu(gpu),
-		kernel(kernel), currentPID(currentPID) {}
+  public:
+	GPUService(Memory& mem, GPU& gpu, Kernel& kernel, u32& currentPID) : mem(mem), gpu(gpu), kernel(kernel), currentPID(currentPID) {}
 	void reset();
 	void handleSyncRequest(u32 messagePointer);
 	void requestInterrupt(GPUInterrupt type);
 	void setSharedMem(u8* ptr) {
 		sharedMem = ptr;
-		if (ptr != nullptr) { // Zero-fill shared memory in case the process tries to read stale service data or vice versa
+		if (ptr != nullptr) {  // Zero-fill shared memory in case the process tries to read stale service data or vice versa
 			std::memset(ptr, 0, 0x1000);
 		}
 	}
diff --git a/include/services/mcu/mcu_hwc.hpp b/include/services/mcu/mcu_hwc.hpp
index 4c6a88305..c2fada28e 100644
--- a/include/services/mcu/mcu_hwc.hpp
+++ b/include/services/mcu/mcu_hwc.hpp
@@ -17,6 +17,7 @@ namespace MCU {
 
 		// Service commands
 		void getBatteryLevel(u32 messagePointer);
+		void setInfoLEDPattern(u32 messagePointer);
 
 	  public:
 		HWCService(Memory& mem, const EmulatorConfig& config) : mem(mem), config(config) {}
diff --git a/src/core/fs/archive_card_spi.cpp b/src/core/fs/archive_card_spi.cpp
new file mode 100644
index 000000000..db1b5fded
--- /dev/null
+++ b/src/core/fs/archive_card_spi.cpp
@@ -0,0 +1,40 @@
+#include <algorithm>
+#include <memory>
+
+#include "fs/archive_card_spi.hpp"
+
+namespace fs = std::filesystem;
+
+HorizonResult CardSPIArchive::createFile(const FSPath& path, u64 size) {
+	Helpers::panic("[Card SPI] CreateFile not yet supported");
+	return Result::Success;
+}
+
+HorizonResult CardSPIArchive::deleteFile(const FSPath& path) {
+	Helpers::panic("[Card SPI] Unimplemented DeleteFile");
+	return Result::Success;
+}
+
+HorizonResult CardSPIArchive::createDirectory(const FSPath& path) {
+	Helpers::panic("[Card SPI] CreateDirectory not yet supported");
+	return Result::Success;
+}
+
+FileDescriptor CardSPIArchive::openFile(const FSPath& path, const FilePerms& perms) {
+	Helpers::panic("[Card SPI] OpenFile not yet supported");
+	return FileError;
+}
+
+Rust::Result<ArchiveBase*, HorizonResult> CardSPIArchive::openArchive(const FSPath& path) {
+	if (path.type != PathType::Empty) {
+		Helpers::panic("Unimplemented path type for CardSPIArchive::OpenArchive");
+	}
+
+	Helpers::warn("Unimplemented: Card SPI archive");
+	return Err(Result::FailurePlaceholder);
+}
+
+Rust::Result<DirectorySession, HorizonResult> CardSPIArchive::openDirectory(const FSPath& path) {
+	Helpers::panic("[Card SPI] OpenDirectory not yet supported");
+	return Err(Result::FailurePlaceholder);
+}
diff --git a/src/core/services/dsp.cpp b/src/core/services/dsp.cpp
index 5d7956b51..93de78da1 100644
--- a/src/core/services/dsp.cpp
+++ b/src/core/services/dsp.cpp
@@ -28,7 +28,8 @@ namespace DSPCommands {
 		RegisterInterruptEvents = 0x00150082,
 		GetSemaphoreEventHandle = 0x00160000,
 		SetSemaphoreMask = 0x00170040,
-		GetHeadphoneStatus = 0x001F0000
+		GetHeadphoneStatus = 0x001F0000,
+		ForceHeadphoneOut = 0x00200040,
 	};
 }
 
@@ -42,6 +43,7 @@ namespace Result {
 void DSPService::reset() {
 	totalEventCount = 0;
 	semaphoreMask = 0;
+	headphonesInserted = true;
 
 	semaphoreEvent = std::nullopt;
 	interrupt0 = std::nullopt;
@@ -60,6 +62,7 @@ void DSPService::handleSyncRequest(u32 messagePointer) {
 		case DSPCommands::ConvertProcessAddressFromDspDram: convertProcessAddressFromDspDram(messagePointer); break;
 		case DSPCommands::FlushDataCache: flushDataCache(messagePointer); break;
 		case DSPCommands::InvalidateDataCache: invalidateDCache(messagePointer); break;
+		case DSPCommands::ForceHeadphoneOut: forceHeadphoneOut(messagePointer); break;
 		case DSPCommands::GetHeadphoneStatus: getHeadphoneStatus(messagePointer); break;
 		case DSPCommands::GetSemaphoreEventHandle: getSemaphoreEventHandle(messagePointer); break;
 		case DSPCommands::LoadComponent: loadComponent(messagePointer); break;
@@ -210,7 +213,8 @@ void DSPService::getHeadphoneStatus(u32 messagePointer) {
 
 	mem.write32(messagePointer, IPC::responseHeader(0x1F, 2, 0));
 	mem.write32(messagePointer + 4, Result::Success);
-	mem.write32(messagePointer + 8, Result::HeadphonesInserted); // This should be toggleable for shits and giggles
+	// This should be toggleable for shits and giggles
+	mem.write32(messagePointer + 8, headphonesInserted ? Result::HeadphonesInserted : Result::HeadphonesNotInserted);
 }
 
 void DSPService::getSemaphoreEventHandle(u32 messagePointer) {
@@ -278,6 +282,14 @@ void DSPService::invalidateDCache(u32 messagePointer) {
 	mem.write32(messagePointer + 4, Result::Success);
 }
 
+void DSPService::forceHeadphoneOut(u32 messagePointer) {
+	headphonesInserted = mem.read8(messagePointer + 4) != 0;
+
+	log("DSP::ForceHeadphoneOut\n");
+	mem.write32(messagePointer, IPC::responseHeader(0x20, 1, 0));
+	mem.write32(messagePointer + 4, Result::Success);
+}
+
 DSPService::ComponentDumpResult DSPService::dumpComponent(const std::filesystem::path& path) {
 	if (loadedComponent.empty()) {
 		return ComponentDumpResult::NotLoaded;
diff --git a/src/core/services/fs.cpp b/src/core/services/fs.cpp
index c6c84ae5f..54a4241dd 100644
--- a/src/core/services/fs.cpp
+++ b/src/core/services/fs.cpp
@@ -102,6 +102,7 @@ ArchiveBase* FSService::getArchiveFromID(u32 id, const FSPath& archivePath) {
 
 		case ArchiveID::TwlPhoto: return &twlPhoto;
 		case ArchiveID::TwlSound: return &twlSound;
+		case ArchiveID::CardSPI: return &cardSpi;
 
 		default:
 			Helpers::panic("Unknown archive. ID: %d\n", id);
diff --git a/src/core/services/gsp_gpu.cpp b/src/core/services/gsp_gpu.cpp
index 8cf77a7e5..96364e736 100644
--- a/src/core/services/gsp_gpu.cpp
+++ b/src/core/services/gsp_gpu.cpp
@@ -14,6 +14,7 @@ namespace ServiceCommands {
 		WriteHwRegsWithMask = 0x00020084,
 		SetBufferSwap = 0x00050200,
 		FlushDataCache = 0x00080082,
+		InvalidateDataCache = 0x00090082,
 		SetLCDForceBlack = 0x000B0040,
 		TriggerCmdReqQueue = 0x000C0000,
 		ReleaseRight = 0x00170000,
@@ -21,7 +22,7 @@ namespace ServiceCommands {
 		SaveVramSysArea = 0x00190000,
 		RestoreVramSysArea = 0x001A0000,
 		SetInternalPriorities = 0x001E0080,
-		StoreDataCache = 0x001F0082
+		StoreDataCache = 0x001F0082,
 	};
 }
 
@@ -63,6 +64,7 @@ void GPUService::handleSyncRequest(u32 messagePointer) {
 		case ServiceCommands::ReadHwRegs: readHwRegs(messagePointer); break;
 		case ServiceCommands::WriteHwRegs: writeHwRegs(messagePointer); break;
 		case ServiceCommands::WriteHwRegsWithMask: writeHwRegsWithMask(messagePointer); break;
+		case ServiceCommands::InvalidateDataCache: invalidateDataCache(messagePointer); break;
 		default: Helpers::panic("GPU service requested. Command: %08X\n", command);
 	}
 }
@@ -278,6 +280,16 @@ void GPUService::flushDataCache(u32 messagePointer) {
 	mem.write32(messagePointer + 4, Result::Success);
 }
 
+void GPUService::invalidateDataCache(u32 messagePointer) {
+	u32 address = mem.read32(messagePointer + 4);
+	u32 size = mem.read32(messagePointer + 8);
+	u32 processHandle = handle = mem.read32(messagePointer + 16);
+	log("GSP::GPU::InvalidateDataCache(address = %08X, size = %X, process = %X)\n", address, size, processHandle);
+
+	mem.write32(messagePointer, IPC::responseHeader(0x9, 1, 0));
+	mem.write32(messagePointer + 4, Result::Success);
+}
+
 void GPUService::storeDataCache(u32 messagePointer) {
 	u32 address = mem.read32(messagePointer + 4);
 	u32 size = mem.read32(messagePointer + 8);
diff --git a/src/core/services/mcu/mcu_hwc.cpp b/src/core/services/mcu/mcu_hwc.cpp
index 2873adf5c..0e4e6ed35 100644
--- a/src/core/services/mcu/mcu_hwc.cpp
+++ b/src/core/services/mcu/mcu_hwc.cpp
@@ -1,10 +1,12 @@
+#include "services/mcu/mcu_hwc.hpp"
+
 #include "ipc.hpp"
 #include "result/result.hpp"
-#include "services/mcu/mcu_hwc.hpp"
 
 namespace MCU::HWCCommands {
 	enum : u32 {
 		GetBatteryLevel = 0x00050000,
+		SetInfoLedPattern = 0x000A0640,
 	};
 }
 
@@ -14,6 +16,7 @@ void MCU::HWCService::handleSyncRequest(u32 messagePointer) {
 	const u32 command = mem.read32(messagePointer);
 	switch (command) {
 		case HWCCommands::GetBatteryLevel: getBatteryLevel(messagePointer); break;
+		case HWCCommands::SetInfoLedPattern: setInfoLEDPattern(messagePointer); break;
 		default: Helpers::panic("MCU::HWC service requested. Command: %08X\n", command);
 	}
 }
@@ -24,4 +27,12 @@ void MCU::HWCService::getBatteryLevel(u32 messagePointer) {
 	mem.write32(messagePointer, IPC::responseHeader(0x5, 2, 0));
 	mem.write32(messagePointer + 4, Result::Success);
 	mem.write8(messagePointer + 8, config.batteryPercentage);
+}
+
+void MCU::HWCService::setInfoLEDPattern(u32 messagePointer) {
+	log("MCU::HWC::SetInfoLedPattern\n");
+
+	// 25 parameters to make some notification LEDs blink...
+	mem.write32(messagePointer, IPC::responseHeader(0xA, 1, 0));
+	mem.write32(messagePointer + 4, Result::Success);
 }
\ No newline at end of file