diff --git a/fusee_cpp/program/program_ovl.ld b/fusee_cpp/program/program_ovl.ld
index b65eb2ca4..9dfe1ce09 100644
--- a/fusee_cpp/program/program_ovl.ld
+++ b/fusee_cpp/program/program_ovl.ld
@@ -23,6 +23,7 @@ SECTIONS {
             BYTE(0x00);
         }
         .ovl_mtc_erista {
+            KEEP(*(.text._ZN3ams6nxboot22DoMemoryTrainingEristaEv))
             fusee_mtc_erista.o(.text*);
             fusee_mtc_erista.o(.rodata*);
             fusee_mtc_erista.o(.data*);
@@ -32,6 +33,7 @@ SECTIONS {
             BYTE(0x00);
         }
         .ovl_mtc_mariko {
+            KEEP(*(.text._ZN3ams6nxboot22DoMemoryTrainingMarikoEv))
             fusee_mtc_mariko.o(.text*);
             fusee_mtc_mariko.o(.rodata*);
             fusee_mtc_mariko.o(.data*);
diff --git a/fusee_cpp/program/source/fusee_main.cpp b/fusee_cpp/program/source/fusee_main.cpp
index e18a04462..c0fce8e6a 100644
--- a/fusee_cpp/program/source/fusee_main.cpp
+++ b/fusee_cpp/program/source/fusee_main.cpp
@@ -23,6 +23,8 @@
 #include "fusee_sd_card.hpp"
 #include "fusee_fatal.hpp"
 #include "fusee_secondary_archive.hpp"
+#include "fusee_setup_horizon.hpp"
+#include "fusee_secmon_sync.hpp"
 
 namespace ams::nxboot {
 
@@ -61,6 +63,10 @@ namespace ams::nxboot {
             }
         }
 
+        void CloseSecondaryArchive() {
+            fs::CloseFile(g_archive_file);
+        }
+
     }
 
     void Main() {
@@ -108,11 +114,29 @@ namespace ams::nxboot {
         InitializeDisplay();
         ShowDisplay();
 
-        /* TODO */
-        WaitForReboot();
+        /* Close the secondary archive. */
+        CloseSecondaryArchive();
 
-        /* TODO */
-        AMS_INFINITE_LOOP();
+        /* Perform rest of the boot process. */
+        SetupAndStartHorizon();
+
+        /* Finalize display. */
+        FinalizeDisplay();
+
+        /* Finalize the data cache. */
+        hw::FinalizeDataCache();
+
+        /* Downclock the bpmp. */
+        clkrst::SetBpmpClockRate(clkrst::BpmpClockRate_408MHz);
+
+        /* Signal to the secure monitor that we're done. */
+        SetBootloaderState(pkg1::BootloaderState_Done);
+
+        /* Halt ourselves. */
+        while (true) {
+            reg::Write(secmon::MemoryRegionPhysicalDeviceFlowController.GetAddress() + FLOW_CTLR_HALT_COP_EVENTS, FLOW_REG_BITS_ENUM(HALT_COP_EVENTS_MODE, FLOW_MODE_STOP),
+                                                                                                                  FLOW_REG_BITS_ENUM(HALT_COP_EVENTS_JTAG,        ENABLED));
+        }
     }
 
 }
diff --git a/fusee_cpp/program/source/fusee_secmon_sync.cpp b/fusee_cpp/program/source/fusee_secmon_sync.cpp
new file mode 100644
index 000000000..d0a8d0219
--- /dev/null
+++ b/fusee_cpp/program/source/fusee_secmon_sync.cpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <exosphere.hpp>
+#include "fusee_secmon_sync.hpp"
+
+namespace ams::nxboot {
+
+    namespace {
+
+        ALWAYS_INLINE pkg1::SecureMonitorParameters &GetSecureMonitorParameters() {
+            return *secmon::MemoryRegionPhysicalDeviceBootloaderParams.GetPointer<pkg1::SecureMonitorParameters>();
+        }
+
+    }
+
+    void WaitSecureMonitorState(pkg1::SecureMonitorState state) {
+        auto &secmon_params = GetSecureMonitorParameters();
+
+        while (secmon_params.secmon_state != state) {
+            hw::InvalidateDataCache(std::addressof(secmon_params.secmon_state), sizeof(secmon_params.secmon_state));
+            util::WaitMicroSeconds(1);
+        }
+    }
+
+    void SetBootloaderState(pkg1::BootloaderState state) {
+        auto &secmon_params = GetSecureMonitorParameters();
+        secmon_params.bootloader_state = state;
+        hw::FlushDataCache(std::addressof(secmon_params.bootloader_state), sizeof(secmon_params.bootloader_state));
+    }
+
+}
\ No newline at end of file
diff --git a/fusee_cpp/program/source/fusee_secmon_sync.hpp b/fusee_cpp/program/source/fusee_secmon_sync.hpp
new file mode 100644
index 000000000..570e0ee39
--- /dev/null
+++ b/fusee_cpp/program/source/fusee_secmon_sync.hpp
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <exosphere.hpp>
+#pragma once
+
+namespace ams::nxboot {
+
+    void WaitSecureMonitorState(pkg1::SecureMonitorState state);
+    void SetBootloaderState(pkg1::BootloaderState state);
+
+}
\ No newline at end of file
diff --git a/fusee_cpp/program/source/fusee_setup_horizon.cpp b/fusee_cpp/program/source/fusee_setup_horizon.cpp
new file mode 100644
index 000000000..c34a983a9
--- /dev/null
+++ b/fusee_cpp/program/source/fusee_setup_horizon.cpp
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <exosphere.hpp>
+#include "fusee_setup_horizon.hpp"
+#include "fusee_fatal.hpp"
+
+namespace ams::nxboot {
+
+    void SetupAndStartHorizon() {
+        /* TODO */
+        ShowFatalError("SetupAndStartHorizon not fully implemented\n");
+    }
+
+}
\ No newline at end of file
diff --git a/fusee_cpp/program/source/fusee_setup_horizon.hpp b/fusee_cpp/program/source/fusee_setup_horizon.hpp
new file mode 100644
index 000000000..70cddc3b1
--- /dev/null
+++ b/fusee_cpp/program/source/fusee_setup_horizon.hpp
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <exosphere.hpp>
+#pragma once
+
+namespace ams::nxboot {
+
+    void SetupAndStartHorizon();
+
+}
\ No newline at end of file
diff --git a/fusee_cpp/program/source/sdram/fusee_sdram.cpp b/fusee_cpp/program/source/sdram/fusee_sdram.cpp
index 79617f779..e124eb3ae 100644
--- a/fusee_cpp/program/source/sdram/fusee_sdram.cpp
+++ b/fusee_cpp/program/source/sdram/fusee_sdram.cpp
@@ -1099,6 +1099,9 @@ namespace ams::nxboot {
         } else /* if (soc_type == fuse::SocType_Mariko) */ {
             InitializeSdram<fuse::SocType_Mariko>(sdram_params);
         }
+
+        /* Lock DRAM scratch. */
+        pmc::LockSecureRegister(pmc::SecureRegister_DramParameters);
     }
 
 }