source/src/vm/fmgen/fmtimer.h

   1 // ---------------------------------------------------------------------------
   2 //      FM sound generator common timer module
   3 //      Copyright (C) cisc 1998, 2000.
   4 // ---------------------------------------------------------------------------
   5 //      $Id: fmtimer.h,v 1.2 2003/04/22 13:12:53 cisc Exp $
   6
   7 #ifndef FM_TIMER_H
   8 #define FM_TIMER_H
   9
  10 //#include "types.h"
  11 #include "../../common.h"
  12
  13 // ---------------------------------------------------------------------------
  14
  15 namespace FM
  16 {
  17         class Timer
  18         {
  19         public:
  20                 void    Reset();
  21                 bool    Count(int32 clock);
  22                 int32   GetNextEvent();
  23
  24         protected:
  25                 virtual void SetStatus(uint bit) = 0;
  26                 virtual void ResetStatus(uint bit) = 0;
  27
  28                 void    SetTimerPrescaler(int32 p);
  29                 void    SetTimerA(uint addr, uint data);
  30                 void    SetTimerB(uint data);
  31                 void    SetTimerControl(uint data);
  32
  33                 void SaveState(void *f);
  34                 bool LoadState(void *f);
  35
  36                 uint8   status;
  37                 uint8   regtc;
  38                 // Refer from XM7. Thanks Ryu.
  39                 bool    timera_enable;
  40                 bool    timerb_enable;
  41         private:
  42                 virtual void TimerA() {}
  43                 uint8   regta[2];
  44
  45                 int32   timera, timera_count;
  46                 int32   timerb, timerb_count;
  47                 int32   prescaler;
  48         };
  49
  50 // ---------------------------------------------------------------------------
  51 //      \8f\89\8aú\89»
  52 //
  53 inline void Timer::Reset()
  54 {
  55         timera_count = 0;
  56         timerb_count = 0;
  57         timera_enable = false;
  58         timerb_enable = false;
  59 }
  60
  61 } // namespace FM
  62
  63 #endif // FM_TIMER_H