diff --git a/exosphere/mariko_fatal/source/fatal_abort_impl.cpp b/exosphere/mariko_fatal/source/fatal_abort_impl.cpp
index 3ee576e23..c04b115b5 100644
--- a/exosphere/mariko_fatal/source/fatal_abort_impl.cpp
+++ b/exosphere/mariko_fatal/source/fatal_abort_impl.cpp
@@ -19,6 +19,8 @@ namespace ams::diag {
 
     void AbortImpl() {
         AMS_SECMON_LOG("AbortImpl was called\n");
+        AMS_LOG_FLUSH();
+        reg::Write(0x4, 0xAAAAAAAA);
 
         /* TODO: Reboot */
         AMS_INFINITE_LOOP();
diff --git a/exosphere/mariko_fatal/source/fatal_main.cpp b/exosphere/mariko_fatal/source/fatal_main.cpp
index 8fd1be9d5..58f73c49c 100644
--- a/exosphere/mariko_fatal/source/fatal_main.cpp
+++ b/exosphere/mariko_fatal/source/fatal_main.cpp
@@ -76,6 +76,7 @@ namespace ams::secmon::fatal {
         }
 
         /* TODO */
+        AMS_LOG_FLUSH();
         AMS_INFINITE_LOOP();
     }
 
diff --git a/exosphere/mariko_fatal/source/fatal_sdmmc.cpp b/exosphere/mariko_fatal/source/fatal_sdmmc.cpp
index daca825ff..ef7035682 100644
--- a/exosphere/mariko_fatal/source/fatal_sdmmc.cpp
+++ b/exosphere/mariko_fatal/source/fatal_sdmmc.cpp
@@ -45,6 +45,7 @@ namespace ams::secmon::fatal {
 
         sdmmc::SetSdCardWorkBuffer(Port, GetSdCardWorkBuffer(), sdmmc::SdCardWorkBufferSize);
 
+        //sdmmc::Deactivate(Port);
         R_TRY(sdmmc::Activate(Port));
 
         return ResultSuccess();
diff --git a/libraries/libvapours/include/vapours/sdmmc/sdmmc_build_config.hpp b/libraries/libvapours/include/vapours/sdmmc/sdmmc_build_config.hpp
index 97d6560c1..8e71a691c 100644
--- a/libraries/libvapours/include/vapours/sdmmc/sdmmc_build_config.hpp
+++ b/libraries/libvapours/include/vapours/sdmmc/sdmmc_build_config.hpp
@@ -33,8 +33,8 @@
     //#define AMS_SDMMC_USE_OS_TIMER
     #define AMS_SDMMC_USE_UTIL_TIMER
     //#define AMS_SDMMC_ENABLE_MMC_HS400
-    //#define AMS_SDMMC_ENABLE_SD_UHS_I
-    //#define AMS_SDMMC_SET_PLLC4_BASE
+    #define AMS_SDMMC_ENABLE_SD_UHS_I
+    #define AMS_SDMMC_SET_PLLC4_BASE
     //#define AMS_SDMMC_USE_SD_CARD_DETECTOR
 
 #elif defined(ATMOSPHERE_IS_MESOSPHERE)
diff --git a/libraries/libvapours/source/sdmmc/impl/sdmmc_clock_reset_controller.reg.board.nintendo_nx.cpp b/libraries/libvapours/source/sdmmc/impl/sdmmc_clock_reset_controller.reg.board.nintendo_nx.cpp
index 3a494281e..d1ed02b90 100644
--- a/libraries/libvapours/source/sdmmc/impl/sdmmc_clock_reset_controller.reg.board.nintendo_nx.cpp
+++ b/libraries/libvapours/source/sdmmc/impl/sdmmc_clock_reset_controller.reg.board.nintendo_nx.cpp
@@ -264,6 +264,9 @@ namespace ams::sdmmc::impl::ClockResetController::reg {
             /* Check that we have registers we can write to. */
             AMS_ABORT_UNLESS(g_clkrst_registers_address != 0);
 
+            AMS_LOG("Setting Clock source: target = %u, actual = %u, CLK_SOURCE = %08x\n", target_frequency_khz, *out_actual_frequency_khz, clk_m | static_cast<u32>(n));
+            AMS_LOG("PLLC4_BASE: %08x\n", ams::reg::Read(g_clkrst_registers_address + CLK_RST_CONTROLLER_PLLC4_BASE));
+
             /* Update the clock source. */
             switch (module) {
                 case Module_Sdmmc1: ams::reg::Write(g_clkrst_registers_address + CLK_RST_CONTROLLER_CLK_SOURCE_SDMMC1, clk_m | static_cast<u32>(n)); break;
diff --git a/libraries/libvapours/source/sdmmc/impl/sdmmc_sd_card_device_accessor.cpp b/libraries/libvapours/source/sdmmc/impl/sdmmc_sd_card_device_accessor.cpp
index 9bfff1ad3..f45c8e18c 100644
--- a/libraries/libvapours/source/sdmmc/impl/sdmmc_sd_card_device_accessor.cpp
+++ b/libraries/libvapours/source/sdmmc/impl/sdmmc_sd_card_device_accessor.cpp
@@ -494,9 +494,11 @@ namespace ams::sdmmc::impl {
         /* Check that we're in 4bit bus mode. */
         IHostController *hc = BaseDeviceAccessor::GetHostController();
         R_UNLESS(hc->GetBusWidth() == BusWidth_4Bit, sdmmc::ResultSdCardNot4BitBusWidthAtUhsIMode());
+        AMS_LOG("%s\n", "BusWidth good\n");
 
         /* Determine what speed mode/access mode we should switch to. */
         R_TRY(this->IssueCommandCheckSupportedFunction(wb, wb_size));
+        AMS_LOG("%s\n", "IssueCommandCheckSupportedFunction\n");
         SwitchFunctionAccessMode target_am;
         SpeedMode target_sm;
         if (max_sm == SpeedMode_SdCardSdr104 && IsSupportedAccessMode(static_cast<const u8 *>(wb), SwitchFunctionAccessMode_Sdr104)) {
@@ -508,16 +510,21 @@ namespace ams::sdmmc::impl {
         } else {
             return sdmmc::ResultSdCardNotSupportSdr104AndSdr50();
         }
+        AMS_LOG("Try Switch to %u %u\n", (u32)target_am, (u32)target_sm);
 
         /* Switch the access mode. */
         R_TRY(this->SwitchAccessMode(target_am, wb, wb_size));
+        AMS_LOG("%s\n", "SwitchAccessMode\n");
 
         /* Set the host controller speed mode and perform tuning using command index 19. */
         R_TRY(hc->SetSpeedMode(target_sm));
+        AMS_LOG("%s\n", "SetSpeedMode\n");
         R_TRY(hc->Tuning(target_sm, 19));
+        AMS_LOG("%s\n", "Tuning\n");
 
         /* Check status. */
         R_TRY(BaseDeviceAccessor::IssueCommandSendStatus());
+        AMS_LOG("%s\n", "IssueCommandSendStatus\n");
 
         return ResultSuccess();
     }
@@ -573,65 +580,93 @@ namespace ams::sdmmc::impl {
         /* Wait 1ms for configuration to take. */
         WaitMicroSeconds(1000);
 
+        AMS_LOG("%s\n", "Did hc->Startup()\n");
+
         /* Wait an additional 74 clocks for configuration to take. */
         WaitClocks(74, hc->GetDeviceClockFrequencyKHz());
 
+        AMS_LOG("%s\n", "Wait 74 clocks\n");
+
         /* Go to idle state. */
         R_TRY(BaseDeviceAccessor::IssueCommandGoIdleState());
 
+        AMS_LOG("%s\n", "Go Idle State\n");
+
         /* Check whether the spec is under 2.0. */
         bool spec_under_2 = false;
         R_TRY_CATCH(this->IssueCommandSendIfCond()) {
             R_CATCH(sdmmc::ResultResponseTimeoutError) { spec_under_2 = true; }
         } R_END_TRY_CATCH;
 
+        AMS_LOG("%s\n", "Send If Cond\n");
+
         /* Set the rca to 0. */
         this->sd_card_device.SetRca(0);
 
+        AMS_LOG("%s\n", "SetRca\n");
+
         /* Go to ready state. */
         const bool can_use_uhs_i_mode = (max_bw != BusWidth_1Bit) && (max_sm == SpeedMode_SdCardSdr104 || max_sm == SpeedMode_SdCardSdr50);
         const bool uhs_i_supported    = hc->IsSupportedTuning() && hc->IsSupportedBusPower(BusPower_1_8V);
         R_TRY(this->ChangeToReadyState(spec_under_2, can_use_uhs_i_mode && uhs_i_supported));
 
+        AMS_LOG("%s\n", "ChangeToReadyState\n");
+
         /* Get the CID. */
         R_TRY(BaseDeviceAccessor::IssueCommandAllSendCid(wb, wb_size));
         this->sd_card_device.SetCid(wb, wb_size);
 
+        AMS_LOG("%s\n", "IssueCommandAllSendCid\n");
+
         /* Go to stby state and get the RCA. */
         R_TRY(this->ChangeToStbyStateAndGetRca());
 
+        AMS_LOG("%s\n", "ChangeToStbyStateAndGetRca\n");
+
         /* Get the CSD. */
         R_TRY(BaseDeviceAccessor::IssueCommandSendCsd(wb, wb_size));
         this->sd_card_device.SetCsd(wb, wb_size);
+        AMS_LOG("%s\n", "IssueCommandSendCsd\n");
         R_TRY(this->SetMemoryCapacity(wb));
 
+        AMS_LOG("%s\n", "SetMemoryCapacity\n");
+
         /* Set the host controller speed mode to default if we're not in uhs i mode. */
         if (!this->sd_card_device.IsUhsIMode()) {
             R_TRY(hc->SetSpeedMode(SpeedMode_SdCardDefaultSpeed));
         }
+        AMS_LOG("%s\n", "SetSpeedMode\n");
 
         /* Issue select card command. */
         R_TRY(BaseDeviceAccessor::IssueCommandSelectCard());
+        AMS_LOG("%s\n", "IssueCommandSelectCard\n");
 
         /* Set block length to sector size. */
         R_TRY(BaseDeviceAccessor::IssueCommandSetBlockLenToSectorSize());
+        AMS_LOG("%s\n", "IssueCommandSetBlockLenToSectorSize\n");
+
 
         /* Try to disconnect dat3 pullup resistor. */
         TryDisconnectDat3PullUpResistor();
+        AMS_LOG("%s\n", "TryDisconnectDat3PullUpResistor\n");
 
         /* Get the SCR. */
         R_TRY(this->GetScr(wb, wb_size));
         const u8 sd_bw = GetSdBusWidths(static_cast<const u8 *>(wb));
         const bool spec_under_1_1 = IsLessThanSpecification1_1(static_cast<const u8 *>(wb));
+        AMS_LOG("%s\n", "GetScr\n");
 
         /* Extend the bus width to the largest that we can. */
         R_TRY(this->ExtendBusWidth(max_bw, sd_bw));
+        AMS_LOG("%s\n", "ExtendBusWidth\n");
 
         /* Extend the bus speed to as fast as we can. */
         if (this->sd_card_device.IsUhsIMode()) {
             R_TRY(this->ExtendBusSpeedAtUhsIMode(max_sm, wb, wb_size));
+            AMS_LOG("%s\n", "ExtendBusSpeedAtUhsIMode\n");
         } else {
             R_TRY(this->ExtendBusSpeedAtNonUhsIMode(max_sm, spec_under_1_1, wb, wb_size));
+            AMS_LOG("%s\n", "ExtendBusSpeedAtNonUhsIMode\n");
         }
 
         /* Enable power saving. */
@@ -682,6 +717,8 @@ namespace ams::sdmmc::impl {
                 return ResultSuccess();
             }
 
+            AMS_LOG("Startup Failed, Result = %08x\n", result.GetValue());
+
             /* Check if we were removed. */
             AMS_SDMMC_CHECK_SD_CARD_REMOVED();
 
diff --git a/libraries/libvapours/source/sdmmc/impl/sdmmc_sdmmc_controller.board.nintendo_nx.cpp b/libraries/libvapours/source/sdmmc/impl/sdmmc_sdmmc_controller.board.nintendo_nx.cpp
index d69d498e1..3e302ff65 100644
--- a/libraries/libvapours/source/sdmmc/impl/sdmmc_sdmmc_controller.board.nintendo_nx.cpp
+++ b/libraries/libvapours/source/sdmmc/impl/sdmmc_sdmmc_controller.board.nintendo_nx.cpp
@@ -458,7 +458,7 @@ namespace ams::sdmmc::impl {
 
         /* Set the buffer read ready enable, and read status to ensure it takes. */
         reg::ReadWrite(this->sdmmc_registers->sd_host_standard_registers.normal_int_enable, SD_REG_BITS_ENUM(NORMAL_INTERRUPT_BUFFER_READ_READY, ENABLED));
-        reg::Read(this->sdmmc_registers->sd_host_standard_registers.normal_int_status);
+        reg::Write(this->sdmmc_registers->sd_host_standard_registers.normal_int_status, reg::Read(this->sdmmc_registers->sd_host_standard_registers.normal_int_status));
 
         /* Issue command with clock disabled. */
         reg::ReadWrite(this->sdmmc_registers->sd_host_standard_registers.clock_control, SD_REG_BITS_ENUM(CLOCK_CONTROL_SD_CLOCK_ENABLE, DISABLE));
@@ -578,6 +578,8 @@ namespace ams::sdmmc::impl {
                             this->drive_strength_calibration_status = sdmmc::ResultSdmmcCompOpen();
                         }
 
+                        AMS_LOG("[sdmmc] IsSocMariko(): %d\n", IsSocMariko());
+                        AMS_LOG("[sdmmc] AUTO_CAL_STATUS: %08x\n", reg::Read(this->sdmmc_registers->auto_cal_status));
                         break;
                     }
 
@@ -726,6 +728,9 @@ namespace ams::sdmmc::impl {
         /* Check that the dat lines are all low. */
         R_UNLESS(reg::HasValue(this->sdmmc_registers->sd_host_standard_registers.present_state, SD_REG_BITS_VALUE(PRESENT_STATE_DAT0_3_LINE_SIGNAL_LEVEL, 0b0000)), sdmmc::ResultSdCardNotReadyToVoltageSwitch());
 
+        /* Set Speed Mode. */
+        R_TRY(this->SetSpeedMode(SpeedMode_SdCardSdr12));
+
         /* Set voltage to 1.8V. */
         SdHostStandardController::EnsureControl();
         R_TRY(this->LowerBusPower());
@@ -746,7 +751,7 @@ namespace ams::sdmmc::impl {
         R_UNLESS(reg::HasValue(this->sdmmc_registers->sd_host_standard_registers.host_control2, SD_REG_BITS_ENUM(HOST_CONTROL2_1_8V_SIGNALING_ENABLE, 1_8V_SIGNALING)), sdmmc::ResultSdHostStandardFailSwitchTo1_8V());
 
         /* Enable clock, and wait 1ms. */
-        reg::ReadWrite(this->sdmmc_registers->sd_host_standard_registers.clock_control, SD_REG_BITS_ENUM(CLOCK_CONTROL_SD_CLOCK_ENABLE, DISABLE));
+        reg::ReadWrite(this->sdmmc_registers->sd_host_standard_registers.clock_control, SD_REG_BITS_ENUM(CLOCK_CONTROL_SD_CLOCK_ENABLE, ENABLE));
         SdHostStandardController::EnsureControl();
         WaitMicroSeconds(1000);
 
@@ -858,6 +863,10 @@ namespace ams::sdmmc::impl {
             }
         }
 
+        AMS_LOG("normal_status: %08x\n", reg::Read(this->sdmmc_registers->sd_host_standard_registers.normal_int_status));
+        AMS_LOG("error_status: %08x\n", reg::Read(this->sdmmc_registers->sd_host_standard_registers.error_int_status));
+        AMS_LOG("HOST_CONTROL2: %08x\n", reg::Read(this->sdmmc_registers->sd_host_standard_registers.host_control2));
+
         /* Check if we're using the tuned clock. */
         R_UNLESS(reg::HasValue(this->sdmmc_registers->sd_host_standard_registers.host_control2, SD_REG_BITS_ENUM(HOST_CONTROL2_SAMPLING_CLOCK, USING_TUNED_CLOCK)), sdmmc::ResultTuningFailed());
 
@@ -889,7 +898,7 @@ namespace ams::sdmmc::impl {
         }
 
         /* If we're at 3.3V, lower to 1.8V. */
-        {
+        if (this->current_bus_power == BusPower_3_3V) {
             /* pcv::ChangeVoltage(pcv::PowerControlTarget_SdCard, 1800000); */
             this->power_controller->LowerBusPower();
 
diff --git a/libraries/libvapours/source/sdmmc/impl/sdmmc_sdmmc_controller.board.nintendo_nx.hpp b/libraries/libvapours/source/sdmmc/impl/sdmmc_sdmmc_controller.board.nintendo_nx.hpp
index 4c5fba691..d007d9dd0 100644
--- a/libraries/libvapours/source/sdmmc/impl/sdmmc_sdmmc_controller.board.nintendo_nx.hpp
+++ b/libraries/libvapours/source/sdmmc/impl/sdmmc_sdmmc_controller.board.nintendo_nx.hpp
@@ -394,7 +394,7 @@ namespace ams::sdmmc::impl {
                                                                                 APB_MISC_REG_BITS_VALUE(GP_SDMMC1_PAD_CFGPADCTRL_CFG2TMC_SDMMC1_PAD_CAL_DRVUP, drvup));
 
                 /* Read to be sure our config takes. */
-                reg::Read(apb_address + APB_MISC_GP_EMMC4_PAD_CFGPADCTRL);
+                reg::Read(apb_address + APB_MISC_GP_SDMMC1_PAD_CFGPADCTRL);
             }
         public:
             Sdmmc1Controller() : SdmmcController(Sdmmc1RegistersPhysicalAddress) {
diff --git a/stratosphere/boot/source/boot_main.cpp b/stratosphere/boot/source/boot_main.cpp
index 5019243cd..2e639196c 100644
--- a/stratosphere/boot/source/boot_main.cpp
+++ b/stratosphere/boot/source/boot_main.cpp
@@ -216,8 +216,6 @@ int main(int argc, char **argv)
         boot::CheckBatteryCharge();
     }
 
-    AMS_ABORT_UNLESS(spl::GetSocType() != spl::SocType_Mariko);
-
     /* Configure pinmux + drive pads. */
     boot::SetInitialPinmuxConfiguration();
 
@@ -243,6 +241,8 @@ int main(int argc, char **argv)
     /* Finalize the i2c server library. */
     boot::FinalizeI2cDriverLibrary();
 
+    AMS_ABORT_UNLESS(spl::GetSocType() != spl::SocType_Mariko);
+
     /* Tell PM to start boot2. */
     R_ABORT_UNLESS(pmshellNotifyBootFinished());