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diff --git a/fpga/usrp2/control_lib/medfifo.v b/fpga/usrp2/control_lib/medfifo.v
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+++ b/fpga/usrp2/control_lib/medfifo.v
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+//
+// Copyright 2011 Ettus Research LLC
+//
+// 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 3 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, see <http://www.gnu.org/licenses/>.
+//
+
+
+module medfifo
+  #(parameter WIDTH=32,
+    parameter DEPTH=1)
+    (input clk, input rst,
+     input [WIDTH-1:0] datain,
+     output [WIDTH-1:0] dataout,
+     input read,
+     input write,
+     input clear,
+     output full,
+     output empty,
+     output [7:0] space,
+     output [7:0] occupied);
+
+   localparam 		NUM_FIFOS = (1<<DEPTH);
+   
+   wire [WIDTH-1:0] 	dout [0:NUM_FIFOS-1];
+   wire [0:NUM_FIFOS-1] full_x;
+   wire [0:NUM_FIFOS-1] empty_x;
+
+   shortfifo #(.WIDTH(WIDTH))
+     head (.clk(clk),.rst(rst),
+	   .datain(datain),.write(write),.full(full),
+	   .dataout(dout[0]),.read(~empty_x[0] & ~full_x[1]),.empty(empty_x[0]),
+	   .clear(clear),.space(space[4:0]),.occupied() );
+   
+   shortfifo #(.WIDTH(WIDTH))
+     tail (.clk(clk),.rst(rst),
+	   .datain(dout[NUM_FIFOS-2]),.write(~empty_x[NUM_FIFOS-2] & ~full_x[NUM_FIFOS-1]),.full(full_x[NUM_FIFOS-1]),
+	   .dataout(dataout),.read(read),.empty(empty),
+	   .clear(clear),.space(),.occupied(occupied[4:0]) );
+
+   genvar 		i;
+   generate
+      for(i = 1; i < NUM_FIFOS-1 ; i = i + 1)
+	begin : gen_depth
+	   shortfifo #(.WIDTH(WIDTH))
+	     shortfifo (.clk(clk),.rst(rst),
+			.datain(dout[i-1]),.write(~full_x[i] & ~empty_x[i-1]),.full(full_x[i]),
+			.dataout(dout[i]),.read(~full_x[i+1] & ~empty_x[i]),.empty(empty_x[i]),
+			.clear(clear),.space(),.occupied() );
+	end
+   endgenerate
+
+   assign space[7:5] = 0;
+   assign occupied[7:5] = 0;
+   
+endmodule // medfifo