text: #include <stdint.h>
  #include <stdbool.h>
  #include "emul.h"
  
  typedef enum {
      PAD_BTN_UP = 0,
      PAD_BTN_DOWN = 1,
      PAD_BTN_LEFT = 2,
      PAD_BTN_RIGHT = 3,
      PAD_BTN_B = 4,
      PAD_BTN_C = 5,
      PAD_BTN_A = 6,
      PAD_BTN_START = 7
  } PAD_BTN;
  
  typedef struct {
      uint8_t pressed;
      Tristate *TH;
  } Pad;
  
  void pad_init(Pad *pad, Tristate *TH);
  void pad_setbtn(Pad *pad, PAD_BTN btn, bool pressed);
  uint8_t pad_rd(Pad *pad);
  