text: /*****************************************************************************/
  /*                                                                           */
  /*				    _sid.h				     */
  /*                                                                           */
  /*		  Internal include file, do not use directly		     */
  /*                                                                           */
  /*                                                                           */
  /*                                                                           */
  /* (C) 1998-2000 Ullrich von Bassewitz                                       */
  /*               Wacholderweg 14                                             */
  /*               D-70597 Stuttgart                                           */
  /* EMail:        uz@musoftware.de                                            */
  /*                                                                           */
  /*                                                                           */
  /* This software is provided 'as-is', without any expressed or implied       */
  /* warranty.  In no event will the authors be held liable for any damages    */
  /* arising from the use of this software.                                    */
  /*                                                                           */
  /* Permission is granted to anyone to use this software for any purpose,     */
  /* including commercial applications, and to alter it and redistribute it    */
  /* freely, subject to the following restrictions:                            */
  /*                                                                           */
  /* 1. The origin of this software must not be misrepresented; you must not   */
  /*    claim that you wrote the original software. If you use this software   */
  /*    in a product, an acknowledgment in the product documentation would be  */
  /*    appreciated but is not required.                                       */
  /* 2. Altered source versions must be plainly marked as such, and must not   */
  /*    be misrepresented as being the original software.                      */
  /* 3. This notice may not be removed or altered from any source              */
  /*    distribution.                                                          */
  /*                                                                           */
  /*****************************************************************************/
  
  
  
  #ifndef __SID_H
  #define __SID_H
  
  
  
  /* Define a structure with the sid register offsets */
  struct __sid_voice {
      unsigned   	       	freq;		/* Frequency */
      unsigned 		pw;		/* Pulse width */
      unsigned char	ctrl;		/* Control register */
      unsigned char	ad;		/* Attack/decay */
      unsigned char	sr;		/* Sustain/release */
  };
  struct __sid {
      struct __sid_voice	v1;     	/* Voice 1 */
      struct __sid_voice 	v2;     	/* Voice 2 */
      struct __sid_voice	v3;     	/* Voice 3 */
      unsigned		flt_freq;   	/* Filter frequency */
      unsigned char	flt_ctrl;	/* Filter control register */
      unsigned char	amp;		/* Amplitude */
      unsigned char	ad1;		/* A/D converter 1 */
      unsigned char      	ad2;		/* A/D converter 2 */
      unsigned char	noise;		/* Noise generator */
      unsigned char	read3;		/* Value of voice 3 */
  };
  
  
  
  /* End of _sid.h */
  #endif
  
  
  
  