/* There are 6 different ways in which program lines are displayed. cf io.c */
#define ONECODE 0
#define TWOCODE 1
#define TWOCODE_9 2
#define TWOCODE_PT 3
#define THREECODE 4
#define THREECODE_PT 5

struct KeyCode {
   BYTE Type; /* The display method */
   BYTE c1, c2, c3; /* The codes to display */
};

/* This array is indexed by the instruction code (from codes.h). Therefore, if
  that file is changed, the codes must also be changed. */
extern struct KeyCode keycodes[];