// SPDX-License-Identifier: MIT
`timescale 1ns/1ps
module tb;
  logic signed [7:0] a; logic signed [15:0] b;
  initial begin
    a=-8; b=a; #1; $display("OBS a=%0d b=%0d bits=%h",a,b,b);
    $finish;
  end
endmodule