git.sur5r.net Git - cc65/blob - include/_sid.h

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                  _sid.h                                   */
   4 /*                                                                           */
   5 /*                Internal include file, do not use directly                 */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1998-2000 Ullrich von Bassewitz                                       */
  10 /*               Wacholderweg 14                                             */
  11 /*               D-70597 Stuttgart                                           */
  12 /* EMail:        uz@musoftware.de                                            */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #ifndef __SID_H
  37 #define __SID_H
  38
  39
  40
  41 /* Define a structure with the sid register offsets */
  42 struct __sid_voice {
  43     unsigned            freq;           /* Frequency */
  44     unsigned            pw;             /* Pulse width */
  45     unsigned char       ctrl;           /* Control register */
  46     unsigned char       ad;             /* Attack/decay */
  47     unsigned char       sr;             /* Sustain/release */
  48 };
  49 struct __sid {
  50     struct __sid_voice  v1;             /* Voice 1 */
  51     struct __sid_voice  v2;             /* Voice 2 */
  52     struct __sid_voice  v3;             /* Voice 3 */
  53     unsigned            flt_freq;       /* Filter frequency */
  54     unsigned char       flt_ctrl;       /* Filter control register */
  55     unsigned char       amp;            /* Amplitude */
  56     unsigned char       ad1;            /* A/D converter 1 */
  57     unsigned char       ad2;            /* A/D converter 2 */
  58     unsigned char       noise;          /* Noise generator */
  59     unsigned char       read3;          /* Value of voice 3 */
  60 };
  61
  62
  63
  64 /* End of _sid.h */
  65 #endif
  66
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  68