Hardware.h

   1 #ifndef AVR_HARDWARE_H
   2 #define AVR_HARDWARE_H
   3
   4 namespace avr {
   5
   6         class Bus;
   7         class IORegister;
   8
   9         class Hardware {
  10                 public:
  11                         Hardware(Bus & bus) : bus(bus), holdCycles(0) {}
  12                         virtual ~Hardware() {}
  13
  14                 public:
  15                         virtual bool attachReg(const char *name, IORegister *reg) = 0;
  16                         virtual void regChanged( IORegister *reg ) = 0;
  17                         virtual void step() {}
  18                         virtual void reset() {}
  19
  20                 public:
  21                         bool isHoldingCPU();
  22
  23                 protected:
  24                         void setHoldCycles(unsigned int cycles);
  25
  26                 protected:
  27                         Bus & bus;
  28                         unsigned int holdCycles;
  29         };
  30
  31         inline void Hardware::setHoldCycles(unsigned int cycles) {
  32                 holdCycles = cycles;
  33         }
  34
  35         inline bool Hardware::isHoldingCPU() {
  36                 if( holdCycles != 0 )
  37                         holdCycles--;
  38
  39                 return (holdCycles != 0);
  40         }
  41
  42 }
  43
  44 #endif /*AVR_HARDWARE_H*/