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/*

    This file is part of Blue8.

    Foobar is free software: you can redistribute it and/or modify

    it under the terms of the GNU Lesser General Public License as published by

    the Free Software Foundation, either version 3 of the License, or

    (at your option) any later version.

    Foobar 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License

    along with Blue8.  If not, see <http://www.gnu.org/licenses/>.

    Blue8 by Al Williams alw@al-williams.com

*/

`timescale 1ns / 1ps

`default_nettype none

////////////////////////////////////////////////////////////////////////////////

// Company: 

// Engineer:

//

// Create Date:    11:17:11 09/21/06

// Design Name:    

// Module Name:    jkff

// Project Name:   

// Target Device:  

// Tool versions:  

// Description:

//

// Dependencies:

// 

// Revision:

// Revision 0.01 - File Created

// Additional Comments:

// 

////////////////////////////////////////////////////////////////////////////////

module jkff(input wire clk, input wire s, input wire r, output reg q=0,input wire clear);  // warning not edge trigger

always @(posedge clk, posedge clear) begin

  if (clear) q<=0;

  else begin

    case ({s,r})

           0: q<=q;

                1: q<=1'b0;

                2:      q<=1'b1;

                3:      q<=~q;

    endcase

  end

end

endmodule