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- library IEEE;
- use IEEE.STD_LOGIC_1164.ALL;
- use IEEE.STD_LOGIC_ARITH.ALL;
- use IEEE.STD_LOGIC_UNSIGNED.ALL;
- entity base is
- Port (
- -- Entradas
- A : in std_logic;
- B : in std_logic;
- Cin : in std_logic;
- -- Salidas
- R : out std_logic; -- Resultado de la resta
- S : out std_logic; -- Signo
- Cout : out std_logic; -- Acarreo
- );
- end base;
- architecture behavioral of base is
- begin
- R<=((not(B) and Cin) or (not(A) and B and not(Cin)) or (A and not(B)));
- Cout<=((A and B and Cin));
- S<=((not(A) and B and not(Cin)));
- end behavioral;
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