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diff --git a/usrp1/tb/cordic_tb.v b/usrp1/tb/cordic_tb.v
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+// -*- verilog -*-
+//
+//  USRP - Universal Software Radio Peripheral
+//
+//  Copyright (C) 2003 Matt Ettus
+//
+//  This program is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation; either version 2 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+//
+
+
+
+module cordic_tb();
+
+   cordic cordic(clk, reset, enable, xi, yi, zi, xo, yo, zo );
+
+   reg reset;
+   reg clk;
+   reg enable;
+   reg [15:0] xi, yi, zi;
+   
+   initial reset = 1'b1;
+   initial #1000 reset = 1'b0;
+
+   initial clk = 1'b0;
+   always #50 clk <= ~clk;
+   
+   initial enable = 1'b1;
+
+   initial zi = 16'b0;
+
+   always @(posedge clk)
+     zi <= #1 zi + 16'd0;
+   
+   wire [15:0] xo,yo,zo;
+
+   initial $dumpfile("cordic.vcd");
+  initial $dumpvars(0,cordic_tb);
+   initial
+     begin
+`include "sine.txt"
+     end
+
+	wire [15:0] xiu = {~xi[15],xi[14:0]};
+	wire [15:0] yiu = {~yi[15],yi[14:0]};
+	wire [15:0] xou = {~xo[15],xo[14:0]};
+	wire [15:0] you = {~yo[15],yo[14:0]};
+   initial $monitor("%d\t%d\t%d\t%d\t%d",$time,xiu,yiu,xou,you);
+
+endmodule // cordic_tb