diff --git a/lib/SDRAM/ddr_sdr_v1_5/src/tb_sdram_ctrl_frontend_wb.vhd b/lib/SDRAM/ddr_sdr_v1_5/src/tb_sdram_ctrl_frontend_wb.vhd
index 2fd94e7..385985e 100644
--- a/lib/SDRAM/ddr_sdr_v1_5/src/tb_sdram_ctrl_frontend_wb.vhd
+++ b/lib/SDRAM/ddr_sdr_v1_5/src/tb_sdram_ctrl_frontend_wb.vhd
@@ -276,7 +276,6 @@ STIMULUS: process
 
 		for i in 0 to 31 loop
 			wait until rising_edge(CLK_O) and SRDY_I = '1';
-			DAT_O	<= DAT_O + 1;
 			ADDR_O	<= ADDR_O + 4;
 		end loop;
 		
@@ -332,7 +331,6 @@ STIMULUS: process
 
 		for i in 0 to 31 loop
 			wait until rising_edge(CLK_O) and SRDY_I = '1';
-			DAT_O	<= DAT_O + 1;
 			ADDR_O	<= ADDR_O + 4;
 		end loop;
 		
@@ -361,7 +359,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -385,7 +382,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -409,7 +405,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -433,7 +428,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -461,7 +455,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -485,7 +478,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -509,7 +501,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -533,7 +524,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -560,6 +550,8 @@ STIMULUS: process
 			CYC_O	<= '1';
 			STB_O	<= '1';
 			WE_O	<= '1';
+			SEL_O	<= "1111";
+			DAT_O	<= X"1111_0000";
 			ADDR_O	<= X"0000_0000";
 
 			for i in 0 to 7 loop
@@ -584,6 +576,8 @@ STIMULUS: process
 			CYC_O	<= '1';
 			STB_O	<= '1';
 			WE_O	<= '1';
+			SEL_O	<= "1111";
+			DAT_O	<= X"2222_0000";
 			ADDR_O	<= X"0000_0400";
 
 			for i in 0 to 7 loop
@@ -608,6 +602,8 @@ STIMULUS: process
 			CYC_O	<= '1';
 			STB_O	<= '1';
 			WE_O	<= '1';
+			SEL_O	<= "1111";
+			DAT_O	<= X"3333_0000";
 			ADDR_O	<= X"0000_0800";
 
 			for i in 0 to 7 loop
@@ -632,6 +628,8 @@ STIMULUS: process
 			CYC_O	<= '1';
 			STB_O	<= '1';
 			WE_O	<= '1';
+			SEL_O	<= "1111";
+			DAT_O	<= X"4444_0000";
 			ADDR_O	<= X"0000_0C00";
 
 			for i in 0 to 7 loop
@@ -660,6 +658,8 @@ STIMULUS: process
 			CYC_O	<= '1';
 			STB_O	<= '1';
 			WE_O	<= '1';
+			SEL_O	<= "1111";
+			DAT_O	<= X"1111_0000";
 			ADDR_O	<= X"0000_1000";
 
 			for i in 0 to 7 loop
@@ -684,6 +684,8 @@ STIMULUS: process
 			CYC_O	<= '1';
 			STB_O	<= '1';
 			WE_O	<= '1';
+			SEL_O	<= "1111";
+			DAT_O	<= X"2222_0000";
 			ADDR_O	<= X"0000_1400";
 
 			for i in 0 to 7 loop
@@ -708,6 +710,8 @@ STIMULUS: process
 			CYC_O	<= '1';
 			STB_O	<= '1';
 			WE_O	<= '1';
+			SEL_O	<= "1111";
+			DAT_O	<= X"3333_0000";
 			ADDR_O	<= X"0000_1800";
 
 			for i in 0 to 7 loop
@@ -732,6 +736,8 @@ STIMULUS: process
 			CYC_O	<= '1';
 			STB_O	<= '1';
 			WE_O	<= '1';
+			SEL_O	<= "1111";
+			DAT_O	<= X"4444_0000";
 			ADDR_O	<= X"0000_1C00";
 
 			for i in 0 to 7 loop
@@ -764,7 +770,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -788,7 +793,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -812,7 +816,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;
 
@@ -836,7 +839,6 @@ STIMULUS: process
 
 			for i in 0 to 7 loop
 				wait until rising_edge(CLK_O) and SRDY_I = '1';
-				DAT_O	<= DAT_O + 1;
 				ADDR_O	<= ADDR_O + 4;
 			end loop;