diff --git a/lib/emac/src/emac_top_jb.vhd b/lib/emac/src/emac_top_jb.vhd
index 5456b48..17b3bff 100644
--- a/lib/emac/src/emac_top_jb.vhd
+++ b/lib/emac/src/emac_top_jb.vhd
@@ -91,6 +91,8 @@ registers_write:
 				rx_ctrl_in.promiscious	<= '0';
 				tx_ctrl_in.Gbps_en		<= '0';
 				rx_ctrl_in.Gbps_en		<= '0';
+				tx_ctrl_in.fcs_gen_en	<= '0';
+				rx_ctrl_in.fcs_chk_en	<= '0';
 			elsif (STB_I and CYC_I and WE_I) = '1' then
 				case ADDR_I(5 downto 2) is
 				
@@ -98,6 +100,7 @@ registers_write:
 				when "0000" =>
 					rx_ctrl_in.reset			<= DAT_I(31);
 					rx_ctrl_in.Gbps_en			<= DAT_I(30);
+					rx_ctrl_in.fcs_chk_en		<= DAT_I(29);
 					rx_ctrl_in.promiscious		<= DAT_I(23);
 					rx_ctrl_in.pkt_req_en		<= DAT_I(17);
 					rx_ctrl_in.pkt_free_en		<= DAT_I(16);
@@ -110,6 +113,7 @@ registers_write:
 				when "0010" =>
 					tx_ctrl_in.reset			<= DAT_I(31);
 					tx_ctrl_in.Gbps_en			<= DAT_I(30);
+					tx_ctrl_in.fcs_gen_en		<= DAT_I(29);
 					tx_ctrl_in.pkt_alloc_en		<= DAT_I(17);
 					tx_ctrl_in.pkt_commit_en	<= DAT_I(16);
 					tx_int_en					<= DAT_I(4);
@@ -160,6 +164,7 @@ registers_read:
 					DAT_O		<= (others => '0');
 					DAT_O(31)	<= rx_ctrl_out.reset_busy;
 					DAT_O(30)	<= rx_ctrl_in.Gbps_en;
+					DAT_O(29)	<= rx_ctrl_in.fcs_chk_en;
 					DAT_O(23)	<= rx_ctrl_in.promiscious;
 					DAT_O(19)	<= rx_ctrl_out.pkt_bcast;
 					DAT_O(18)	<= rx_ctrl_out.pkt_mac_match;
@@ -178,6 +183,7 @@ registers_read:
 					DAT_O		<= (others => '0');
 					DAT_O(31)	<= tx_ctrl_out.reset_busy;
 					DAT_O(30)	<= tx_ctrl_in.Gbps_en;
+					DAT_O(29)	<= tx_ctrl_in.fcs_gen_en;
 					DAT_O(24)	<= tx_ctrl_out.pkt_done;
 					DAT_O(17)	<= tx_ctrl_out.pkt_alloc_req;
 					DAT_O(16)	<= tx_ctrl_out.pkt_armed;
diff --git a/lib/emac/src/emac_types.vhd b/lib/emac/src/emac_types.vhd
index 54555a5..450d5be 100644
--- a/lib/emac/src/emac_types.vhd
+++ b/lib/emac/src/emac_types.vhd
@@ -18,6 +18,7 @@ package emac_types is
 	type tx_ctrl_in_t is record
 		Gbps_en				: std_logic;
 		reset				: std_logic;
+		fcs_gen_en			: std_logic;
 		tx_size				: unsigned(15 downto 0);
 		pkt_commit_en		: std_logic;
 		pkt_alloc_en		: std_logic;
@@ -34,6 +35,7 @@ package emac_types is
 	type rx_ctrl_in_t is record
 		Gbps_en				: std_logic;
 		reset				: std_logic;
+		fcs_chk_en			: std_logic;
 		pkt_read_en			: std_logic;
 		pkt_req_en			: std_logic;
 		pkt_free_en			: std_logic;