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diff --git a/source/mupen64plus-core/src/debugger/debugger.c b/source/mupen64plus-core/src/debugger/debugger.c
new file mode 100644
index 0000000..12ab082
--- /dev/null
+++ b/source/mupen64plus-core/src/debugger/debugger.c
@@ -0,0 +1,104 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *   Mupen64plus - debugger.c                                              *
+ *   Mupen64Plus homepage: http://code.google.com/p/mupen64plus/           *
+ *   Copyright (C) 2008 DarkJeztr                                          *
+ *   Copyright (C) 2002 davFr                                              *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that 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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include <SDL.h>
+
+#include "api/debugger.h"
+
+#include "dbg_types.h"
+#include "debugger.h"
+#include "dbg_breakpoints.h"
+#include "dbg_memory.h"
+
+// State of the Emulation Thread:
+// 0 -> pause, 2 -> run.
+
+int g_DebuggerActive = 0;    // whether the debugger is enabled or not
+int run;
+
+static SDL_cond  *debugger_done_cond;
+static SDL_mutex *mutex;
+
+uint32 previousPC;
+
+//]=-=-=-=-=-=-=-=-=-=-=[ Initialisation du Debugger ]=-=-=-=-=-=-=-=-=-=-=-=[
+
+void init_debugger()
+{
+    g_DebuggerActive = 1;
+    run = 0;
+
+    DebuggerCallback(DEBUG_UI_INIT, 0); /* call front-end to initialize user interface */
+
+    init_host_disassembler();
+
+    mutex = SDL_CreateMutex();
+    debugger_done_cond = SDL_CreateCond();
+}
+
+void destroy_debugger()
+{
+    SDL_DestroyMutex(mutex);
+    mutex = NULL;
+    SDL_DestroyCond(debugger_done_cond);
+    debugger_done_cond = NULL;
+    g_DebuggerActive = 0;
+}
+
+//]=-=-=-=-=-=-=-=-=-=-=-=-=[ Mise-a-Jour Debugger ]=-=-=-=-=-=-=-=-=-=-=-=-=[
+
+void update_debugger(uint32 pc)
+// Update debugger state and display.
+// Should be called after each R4300 instruction
+// Checks for breakpoint hits on PC
+{
+    int bpt;
+
+    if(run!=0) {//check if we hit a breakpoint
+        bpt = check_breakpoints(pc);
+        if( bpt!=-1 ) {
+            run = 0;
+            
+            if(BPT_CHECK_FLAG(g_Breakpoints[bpt], BPT_FLAG_LOG))
+                log_breakpoint(pc, BPT_FLAG_EXEC, 0);
+        }
+    }
+
+    if(run!=2) {
+        DebuggerCallback(DEBUG_UI_UPDATE, pc);  /* call front-end to notify user interface to update */
+    }
+    if(run==0) {
+        // Emulation thread is blocked until a button is clicked.
+        SDL_mutexP(mutex);
+        SDL_CondWait(debugger_done_cond, mutex);
+        SDL_mutexV(mutex);
+    }
+
+    previousPC = pc;
+}
+
+void debugger_step()
+{
+    SDL_CondSignal(debugger_done_cond);
+}
+
+