thardreg.txt

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`include "hardreg.v"

module hardreg_top;

reg clock,clearb;
reg[3:0] data;
wire[3:0] qout;

`define stim #100 data=4'b
event end_first_pass;
    hardreg reg_4bit(.d(data),.clk(clock),.clrb(clearb),.q(qout));

	initial
	begin
	clock=0;
	clearb=1;
	end

	always #50 clock=~clock;
	always @(end_first_pass)
		clearb=~clearb;
	always @(posedge clock)
		$display("at time %0d clearb=%b data=%d qout=%d",$time,clearb,data,qout);

	initial
	begin
	  repeat(4)
	    begin
	       data=4'b0000;
               `stim 0001;
               `stim 0011;
                `stim 0111;
                `stim 1111;
                #200 -> end_first_pass;
             end
         $finish;
           end
endmodule