Subversion Repositories psg16

`timescale 1ns / 1ps
// ============================================================================
//	(C) 2007,2012  Robert Finch
//	All rights reserved.
//	robfinch<remove>@opencores.org
//
//	PSGVolumeControl.v 
//		Controls the PSG's output volume.
//
// 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 3 of the License, or     
// (at your option) any later version.                                      
//                                                                          
// This source file 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 PSGVolumeControl(rst_i, clk_i, i, volume, o);
input rst_i;
input clk_i;
input [21:0] i;
input [7:0] volume;
output [29:0] o;
reg [29:0] o;
 
always @(posedge clk_i)
if (rst_i)
    o <= 26'b0;		// Force the output volume to zero on reset
else
    o <= i * volume;
 
endmodule