//2023-11-8 
//8λ

module inv_8bits (
                       A,
                       Y
                );

input[7:0]             A;
output[7:0]            Y;

assign                 Y=~A;
    
endmodule


//-----testbench-----

module tb_inv_8bits ();

reg[7:0]                a;
wire[7:0]               y; 

initial begin
                        a=8'b00000000;
        #3000           $stop;
end

always #10              a=a+1;

inv_8bits u_inv_8bits (
                        .A(a),
                        .Y(y)
                     );
    
endmodule