diff --git a/lib/CPUs/MIPS/src/core/mips_cop.vhd b/lib/CPUs/MIPS/src/core/mips_cop.vhd
index 357c5a7..ea917c6 100644
--- a/lib/CPUs/MIPS/src/core/mips_cop.vhd
+++ b/lib/CPUs/MIPS/src/core/mips_cop.vhd
@@ -72,7 +72,6 @@ architecture Behavioral of cop is
 	signal exception_end	: STD_LOGIC;
 	signal eflags			: exc_flags_t;
 	signal exc_enable		: STD_LOGIC;
-	signal cop_EX_en		: STD_LOGIC;
 	signal icache_info		: unsigned(7 downto 0);
 	signal dcache_info		: unsigned(7 downto 0);
 	
@@ -118,9 +117,8 @@ begin
 	cop_pipe_ID.rt					<= extract_rt(ir);
 	cop_pipe_ID.func				<= extract_func(ir);
 	cop_pipe_ID.CO					<= ir(25);
-	cop_pipe_ID.re					<= cop_pipe_ID.cs when (cop_pipe_ID.opc = "111000" or cop_pipe_ID.rs = "00000") else '0';
-	cop_pipe_ID.we					<= cop_pipe_ID.cs when (cop_pipe_ID.opc = "110000" or cop_pipe_ID.rs = "00100") else '0';
-	cop_EX_en						<= exc_enable and not status_save;
+	cop_pipe_ID.re					<= cop_pipe_ID.cs when (cop_pipe_ID.opc = "111000" or (cop_pipe_ID.opc = "010000" and cop_pipe_ID.rs = "00000")) else '0';
+	cop_pipe_ID.we					<= cop_pipe_ID.cs when (cop_pipe_ID.opc = "110000" or (cop_pipe_ID.opc = "010000" and cop_pipe_ID.rs = "00100")) else '0';
 	
 	ctrl_out.RE						<= status(25);
 	ctrl_out.user_mode				<= status(1);
@@ -319,8 +317,10 @@ cop_ip_reg_write:
 		if rising_edge(clk) then
 			if rst = '1' then
 				ip(1 downto 0) <= (others => '0');
-			elsif ip_reg_we = '1' then
-				ip(1 downto 0) <= din(9 downto 8) and im(1 downto 0);
+			elsif ctrl_in.sdu.WB_nop = '0' then
+				if ip_reg_we = '1' then
+					ip(1 downto 0) <= din(9 downto 8) and im(1 downto 0);
+				end if;	
 			end if;	
 			ip(7 downto 2)	<= ctrl_in.events.Int and im(7 downto 2);
 		end if;
@@ -386,6 +386,9 @@ cop_register_read:
 
 	end process;
 
+-- 18296365000 ps
+-- 20158175000 ps
+
 cop_we_gen:
 	process(clk)
 	begin
@@ -398,7 +401,7 @@ cop_we_gen:
 				test_reg_we	<= '0';
 				stat_reg_we	<= '0';
 				ip_reg_we	<= '0';
-				if (cop_EX_en and cop_pipe_EX.we) = '1' then
+				if cop_pipe_EX.we = '1' then
 
 					case cop_pipe_EX.reg_ptr is