diff --git a/README.md b/README.md
index 6b30acc..f733a46 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@ ARM barrel shifter (pour debug ROR et RRX) : http://www.davespace.co.uk/arm/intr
 
 VHDL basics par Intel FPGA : https://www.youtube.com/watch?v=zm-RA6BsYmc&ab_channel=IntelFPGA
 
+Declaration VHDL : https://www.csee.umbc.edu/portal/help/VHDL/declare.html
+
 # notice :
 
 Utiliser uniquement ghdl-gcc (llvm et mcode abort lors des overflows dans les tbs)
diff --git a/alu.vhdl b/alu.vhdl
index 16dc5bc..aecf350 100644
--- a/alu.vhdl
+++ b/alu.vhdl
@@ -40,24 +40,24 @@ begin
 	begin
 		case cmd is
 			when "00" =>
- 	 	report "ADD";
+ 	 	-- report "ADD";
 		res_temp <= add;
 		cout_temp <= add_cout;
 
 			when "01" =>
-		report "AND";
+		-- report "AND";
 		res_temp <= op1 and op2 ;
 		cout_temp <= '0';
 			when "10" =>
-		report "OR ";
+		-- report "OR ";
 		res_temp <= op1 or  op2;
 		cout_temp <= '0';
 			when "11" =>
-		report "XOR";
+		-- report "XOR";
 		res_temp <= op1 xor op2 ;
 		cout_temp <= '0';
 			when others =>
-		report "ERROR";
+		report "[ERROR] SWITCH CASE UNREACHABLE (Alu::cmd not initialised ?)";
 		end case;
 	end process;
 
diff --git a/exec.vhdl b/exec.vhdl
index bcc8549..b41e76e 100644
--- a/exec.vhdl
+++ b/exec.vhdl
@@ -240,15 +240,18 @@ architecture Behavior OF EXec is
 	-- carry flag
 	exe_c <= alu_value_cout;
 	
-	-- sortie mutex entre ALU et fifo
-
+	-- sortie du mutiplexeur entre ALU et fifo
 	mem_adr <= (dec_op1) when dec_pre_index='1' else alu_value_out;
 	
-	-- Sortie restante
-	-- exe_pop <= dec2exe_empty;
-
-	-- exe_dest <= dec_exe_dest;
-	-- exe_wb <= dec_exe_wb;
-	-- exe_flag_wb <= dec_flag_wb;
-			
+	-- Synchronisation fifo
+	exe_pop <= '1' when (
+			(not dec2exe_empty='1') and (not exe2mem_full='1') 						-- verification dec2exe non vide et exe2mem non pleine
+		and (dec_mem_lb='1' or dec_mem_lw='1' or dec_mem_sb='1' or dec_mem_sw='1')	-- si un acces memoire a lieu
+	) else '0';
+	
+	
+	exe_dest <= dec_exe_dest;
+	exe_wb 		<= '0' when dec2exe_empty ='1' else dec_exe_wb ;
+	exe_flag_wb <= '0' when dec2exe_empty ='1' else dec_flag_wb;
+	
 end Behavior;
\ No newline at end of file