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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