text: /*
  ** Nofrendo (c) 1998-2000 Matthew Conte (matt@conte.com)
  **
  **
  ** This program is free software; you can redistribute it and/or
  ** modify it under the terms of version 2 of the GNU Library General 
  ** Public License as published by the Free Software Foundation.
  **
  ** 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 
  ** Library General Public License for more details.  To obtain a 
  ** copy of the GNU Library General Public License, write to the Free 
  ** Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  **
  ** Any permitted reproduction of these routines, in whole or in part,
  ** must bear this legend.
  **
  **
  ** fds_snd.c
  **
  ** Famicom Disk System sound emulation
  ** $Id: fds_snd.c,v 1.2 2001/04/27 14:37:11 neil Exp $
  */
  
  #include "nes_apu.h"
  #include "fds_snd.h"
  
  static int32 fds_incsize = 0;
  
  /* mix sound channels together */
  static int32 fds_process(void)
  {
     int32 output;
     output = 0;
  
     return output;
  }
  
  /* write to registers */
  static void fds_write(uint32 address, uint8 value)
  {
     UNUSED(address);
     UNUSED(value);
  }
  
  /* reset state of vrcvi sound channels */
  static void fds_reset(void)
  {
     apu_t apu;
  
     apu_getcontext(&apu);
  //   fds_incsize = apu.cycle_rate;
     fds_incsize = (int32) (APU_BASEFREQ * 65536.0 / (float) apu.sample_rate);
  }
  
  static apu_memwrite fds_memwrite[] =
  {
     { 0x4040, 0x4092, fds_write }, 
     {     -1,     -1, NULL }
  };
  
  apuext_t fds_ext = 
  {
     NULL, /* no init */
     NULL, /* no shutdown */
     fds_reset,
     fds_process,
     NULL, /* no reads */
     fds_memwrite
  };
  
  /*
  ** $Log: fds_snd.c,v $
  ** Revision 1.2  2001/04/27 14:37:11  neil
  ** wheeee
  **
  ** Revision 1.1  2001/04/27 12:54:40  neil
  ** blah
  **
  ** Revision 1.1.1.1  2001/04/27 07:03:54  neil
  ** initial
  **
  ** Revision 1.1  2000/10/24 12:19:59  matt
  ** changed directory structure
  **
  ** Revision 1.9  2000/10/11 12:13:15  matt
  ** quelled warnings
  **
  ** Revision 1.8  2000/10/03 11:56:20  matt
  ** better support for optional sound ext routines
  **
  ** Revision 1.7  2000/09/15 13:38:40  matt
  ** changes for optimized apu core
  **
  ** Revision 1.6  2000/09/15 04:58:07  matt
  ** simplifying and optimizing APU core
  **
  ** Revision 1.5  2000/07/30 04:32:59  matt
  ** no more apu_getcyclerate hack
  **
  ** Revision 1.4  2000/07/17 01:52:30  matt
  ** made sure last line of all source files is a newline
  **
  ** Revision 1.3  2000/07/03 02:18:53  matt
  ** much better external module exporting
  **
  ** Revision 1.2  2000/06/20 04:06:16  matt
  ** migrated external sound definition to apu module
  **
  ** Revision 1.1  2000/06/20 00:06:47  matt
  ** initial revision
  **
  */
  