text: #ifndef ISR_H
  #define ISR_H
  
  #include "gameboy.h"
  
  void timer_isr(void) __interrupt
  {
      breakpoint();
  }
  
  void vblank_isr(void) __critical __interrupt
  {
      poll_joypad();
      //breakpoint();
  }
  
  void lcd_isr(void) __critical __interrupt
  {
      breakpoint();
  }
  
  void serial_isr(void) __critical __interrupt
  {
      breakpoint();
  }
  
  void joypad_isr(void) __critical __interrupt
  {
      breakpoint();
  }
  
  #endif
  
  