--- /dev/null
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// File name "pci_io_mux_ad_en_crit.v" ////
+//// ////
+//// This file is part of the "PCI bridge" project ////
+//// http://www.opencores.org/cores/pci/ ////
+//// ////
+//// Author(s): ////
+//// - Miha Dolenc (mihad@opencores.org) ////
+//// ////
+//// All additional information is avaliable in the README ////
+//// file. ////
+//// ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2001 Miha Dolenc, mihad@opencores.org ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file 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 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source 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 this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: pci_io_mux_ad_en_crit.v,v $
+// Revision 1.1 2007-03-20 17:50:56 sithglan
+// add shit
+//
+// Revision 1.2 2003/01/27 16:49:31 mihad
+// Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed.
+//
+// Revision 1.1 2002/02/01 14:43:31 mihad
+// *** empty log message ***
+//
+//
+
+// module provides equation for ad output enables, which uses critical pci bus inputs
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+
+// module is provided for ad bus output enable Flip-Flops values
+module pci_io_mux_ad_en_crit
+(
+ ad_en_in,
+ pci_frame_in,
+ pci_trdy_in,
+ pci_stop_in,
+ ad_en_out
+);
+input ad_en_in,
+ pci_frame_in,
+ pci_trdy_in,
+ pci_stop_in ;
+output ad_en_out ;
+
+assign ad_en_out = ad_en_in && ( ~pci_frame_in || (pci_trdy_in && pci_stop_in) ) ;
+endmodule