44. Bus Error Checker

How do you plan to solve it?

module error_checker_xz(
    input  [7:0] bus,
    output all_known,
    output has_unknown,
    output [7:0] bus_if_known
);

     assign has_unknown=(^bus === 1'bx);
     assign all_known=~has_unknown;
     assign bus_if_known ={8{all_known}}&bus;
    

endmodule