/***************************************
 * ECHO - Demo program for the Apple 1 *
 * Echos typed keys to display         *
 * ESC key aborts to monitor           *
 ***************************************/
 
#include <vic20.h02>

char key;  //Key value

main:
  key = getkey();
  if (key == 3) goto exit;
  prchr(key);
  goto main;