diff --git a/Epreuve3.py b/Epreuve3.py
index 28a81e0..d9c08ee 100644
--- a/Epreuve3.py
+++ b/Epreuve3.py
@@ -242,7 +242,7 @@ class Simulator:
 
     # ----------------- boucle principale -----------------
 
-    def run(self, max_steps: int = 100000):
+    def run(self, max_steps: int = 1):
         steps = 0
         while self.cpu.running and steps < max_steps:
             result = self.step()
diff --git a/simulateur_front.py b/simulateur_front.py
index 0208636..6bf64fa 100644
--- a/simulateur_front.py
+++ b/simulateur_front.py
@@ -61,8 +61,8 @@ buttons_frame.pack(padx=5, pady=5, side=tk.TOP)
 buttonAll = tk.Button(root, text="All In")
 buttonStep = tk.Button(root, text="Step By Step")
 
-buttonAll.pack(in_=buttons_frame, side=tk.LEFT)
-buttonStep.pack(in_=buttons_frame, side=tk.LEFT)
+buttonAll.pack(in_=buttons_frame, side=tk.LEFT, padx=5)
+buttonStep.pack(in_=buttons_frame, side=tk.LEFT, padx=5)
 
 image_frame = tk.Frame(instructions_frame, width=400, height=100, bg="#89B4E1")
 image_frame.pack(padx=5, pady=5, side=tk.TOP)
@@ -132,10 +132,7 @@ label_eq = Label(annexe_1_frame, bg="orange")
 label_eq.pack(pady=5)
 
 
-
-
-
-#RAnnexe 2
+#Annexe 2
 annexe_2_frame = tk.Frame(annexes_frames, width=100, height=100, bg="orange")
 annexe_2_frame.pack(padx=10, pady=0, side=tk.LEFT)
 
@@ -197,11 +194,29 @@ myOutList = tk.Listbox(out_frame, yscrollcommand=scrollbarOut.set, width=50)
 myOutList.pack(side=tk.LEFT, fill=tk.BOTH)
 scrollbarOut.config(command=myOutList.yview)
 
+def StartCPU(program, callback, registerCallback):
+    print(program)
+    sim = e3.Simulator(program)
+
+def onClickButtonAll():
+    print("oui")
+    StartCPU(program, None, None)
+    sim.run(100000)
+    update_gui()
+
+def onClickButtonStep():
+    print("non")
+    StartCPU(program, None, None)
+    sim.run()
+    update_gui()
 
 
-#val = subprocess.run(["/usr/bin/python3", "/home/aurelien/Documents/24hducode2026/24H_du_code_2026/Epreuve3.py", "test_bin_epreuve3/call_label.bin"]            # transforme bytes en str)
+buttonAll.config(command=onClickButtonAll)
+buttonStep.config(command=onClickButtonStep)
 
 
+#Gestion dynamique affichage valeurs
+
 previous_sp = None  # Initialisation avant la première itération
 
 def update_gui():
@@ -209,7 +224,8 @@ def update_gui():
     try:
         state = next(sim_iter)
 
-        # 👉 mise à jour label instruction
+        #Récupération des valeurs retourné par le fichier Epreuve3.py
+
         single_instr.config(
             text=state["instr"] + "  Cycle(s): " + str(state["cycles_added"])
         )
@@ -239,6 +255,7 @@ def update_gui():
         previous_sp = state['sp']
         ram = state['ram']
 
+        #Gestion affichage RAM
         for addr in range(0, 256, 8):
             chunk = ram[addr:addr+8]
             hex_values = " ".join(f"{b:02X}" for b in chunk)