`timescale 1ns/1ns module encoder_0( input [8:0] I_n , output reg [3:0] Y_n ); always@(*)begin case(1'b0) I_n[8]:Y_n = 4'b0110; I_n[7]:Y_n = 4'b0111; I_n[6]:Y_n = 4'b1000; I_n[5]:Y_n = 4'b1001; I_n[4]:Y_n = 4'b1010; ...