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
  12 // ---------------------------------------------------------------------------
  13
  14 namespace FM
  15 {
  16         class Timer
  17         {
  18         public:
  19                 void    Reset();
  20                 bool    Count(int32 clock);
  21                 int32   GetNextEvent();
  22
  23         protected:
  24                 virtual void SetStatus(uint bit) = 0;
  25                 virtual void ResetStatus(uint bit) = 0;
  26
  27                 void    SetTimerPrescaler(int32 p);
  28                 void    SetTimerA(uint addr, uint data);
  29                 void    SetTimerB(uint data);
  30                 void    SetTimerControl(uint data);
  31
  32                 void SaveState(void *f);
  33                 bool LoadState(void *f);
  34
  35                 uint8   status;
  36                 uint8   regtc;
  37         private:
  38                 virtual void TimerA() {}
  39                 uint8   regta[2];
  40
  41                 int32   timera, timera_count;
  42                 int32   timerb, timerb_count;
  43                 int32   prescaler;
  44         };
  45
  46 // ---------------------------------------------------------------------------
  47 //      \8f\89\8aú\89»
  48 //
  49 inline void Timer::Reset()
  50 {
  51         timera_count = 0;
  52         timerb_count = 0;
  53 }
  54
  55 } // namespace FM
  56
  57 #endif // FM_TIMER_H