library ieee; use ieee.numeric_bit.all; entity nor23 is port ( a_i : in bit_vector (22 downto 0); b_i : in bit_vector (22 downto 0); c_o : out bit_vector (22 downto 0) ); end entity nor23; architecture rtl of nor23 is begin c_o <= a_i nor b_i; end architecture rtl;