diff --git a/cores/c64/rtl/fpga64_keyboard_matrix_mark_mcdougall.vhd b/cores/c64/rtl/fpga64_keyboard_matrix_mark_mcdougall.vhd
index 00ba0f1..3d7dfaa 100644
--- a/cores/c64/rtl/fpga64_keyboard_matrix_mark_mcdougall.vhd
+++ b/cores/c64/rtl/fpga64_keyboard_matrix_mark_mcdougall.vhd
@@ -54,8 +54,6 @@ entity fpga64_keyboard_matrix is
 		trace2Key : out std_logic;
 		disk_num : out std_logic_vector(7 downto 0);
 		
-		cart_detach_key : out std_logic;			-- CTRL D - remove active cartridge signal - LCA
-
 		tapPlayStopKey: out std_logic;
 		
 		-- Config
@@ -367,7 +365,6 @@ begin
 			videoKey <= '0';
 			joySelKey <= '0';
 			diskChgKey <= '0';
-			cart_detach_key <= '0';
 			tapPlayStopKey <= '0';
 			if newScanCode = '1' then
 				if theScanCode=X"F0" then
@@ -407,14 +404,7 @@ begin
 					when X"1E" => key_2 <= not releaseFlag; 
 					when X"21" => key_C <= not releaseFlag; 
 					when X"22" => key_X <= not releaseFlag; 
-					when X"23" =>  -- key_D - if CTRL-D the detach cartridge else its a "D" - LCA												
-						if key_ctrl = '1' then
-							cart_detach_key <= '1';
-						else
---							if releaseFlag = '0' then
-								key_D <= not releaseFlag;
---							end if;
-						end if;	
+					when X"23" => key_D <= not releaseFlag;
 					when X"24" => key_E <= not releaseFlag; 
 					when X"25" => key_4 <= not releaseFlag; 
 					when X"26" => key_3 <= not releaseFlag; 
diff --git a/cores/c64/rtl/fpga64_sid_iec.vhd b/cores/c64/rtl/fpga64_sid_iec.vhd
index 3b37796..6753f66 100644
--- a/cores/c64/rtl/fpga64_sid_iec.vhd
+++ b/cores/c64/rtl/fpga64_sid_iec.vhd
@@ -44,7 +44,6 @@ entity fpga64_sid_iec is
 		kbd_clk     : in  std_logic;
 		kbd_dat     : in  std_logic;
 		reset_key   : out std_logic;
-		cart_detach_key : out std_logic;
 		tap_playstop_key : out std_logic;
 
 		-- external memory
@@ -805,7 +804,6 @@ div1m: process(clk32)				-- this process devides 32 MHz to 1MHz (for the SID)
 			trace2Key => trace2Key,
 			reset_key => reset_key,
 			restore_key => restore_key,
-			cart_detach_key => cart_detach_key,					-- cartridge detach key CTRL-D - LCA
 			tapPlayStopKey => tap_playstop_key,
 			disk_num => disk_num,
 
diff --git a/cores/c64/rtl/mist/c64_mist.vhd b/cores/c64/rtl/mist/c64_mist.vhd
index bdf9634..8d81d92 100644
--- a/cores/c64/rtl/mist/c64_mist.vhd
+++ b/cores/c64/rtl/mist/c64_mist.vhd
@@ -403,7 +403,6 @@ end component cartridge;
 	signal potB_x   : std_logic_vector(7 downto 0);
 	signal potB_y   : std_logic_vector(7 downto 0);
 	signal reset_key : std_logic;
-	signal cart_detach_key :std_logic;							-- cartridge detach key CTRL-D - LCA
 	
 	signal c64_r  : std_logic_vector(5 downto 0);
 	signal c64_g  : std_logic_vector(5 downto 0);
@@ -1097,7 +1096,6 @@ begin
 		c64rom_addr => c64rom_addr,
 		c64rom_data => ioctl_data,
 		c64rom_wr => c64rom_wr,
---		cart_detach_key => cart_detach_key,
 		tap_playstop_key => tap_playstop_key,
 		reset_key => reset_key
 	);