diff --git a/src/t80/T80pa.vhd b/src/t80/T80pa.vhd
index cb3d146..bacbc60 100644
--- a/src/t80/T80pa.vhd
+++ b/src/t80/T80pa.vhd
@@ -79,6 +79,7 @@ entity T80pa is
 		RFSH_n		: out std_logic;
 		HALT_n		: out std_logic;
 		BUSAK_n		: out std_logic;
+		OUT0        : in  std_logic := '0';  -- 0 => OUT(C),0, 1 => OUT(C),255
 		A				: out std_logic_vector(15 downto 0);
 		DI				: in  std_logic_vector(7 downto 0);
 		DO				: out std_logic_vector(7 downto 0);
@@ -134,6 +135,7 @@ begin
 			REG     => REG,
 			MC      => MCycle,
 			TS      => TState,
+			OUT0    => OUT0,
 			IntCycle_n => IntCycle_n
 		);