ÃOMMAND:     ÅØÅÃ
 
  ÓEE ALSO:    *, >, >>, ÇÅÔ, ÐÕÔ, ÉÎÔ20, ÂÁÔÃÈ ÆÉÌÅÓ
 
  ÓYNTAX:      EXEC SEQUENTIAL_FILENAME
 
  ÆUNCTION:
 
 
  ×HEN YOU  FIRST BOOT  THE ÄÏÓ  SHELL, IT SEARCHES DRIVE A: FOR A ÓÅÑ FILE
CALLED "AUTOEXEC"  AND THEN PROCEEDS TO EXECUTE WHATEVER IS IN THAT FILE AS
IF YOU  HAD ENTERED THAT TEXT FROM THE KEYBOARD. ÔHE REASON IT DOES THIS IS
BECAUSE "EXEC AUTOEXEC" IS ON THE COMMAND LINE WHEN THE SHELL IS INSTALLED.
 
  ÉF YOU'VE EVER USED ÓÙÓÒÅÓ IN 64 MODE, THEN YOU ARE    PROBABLY     QUITE
FAMILIAR WITH ÅØÅÃ FILES AND KNOW HOW USEFUL THEY CAN BE.
 
  ×HEN YOU ÅØÅÃ A FILE, THIS IS WHAT HAPPENS.
 
  ÆIRST, THE  SHELL TRIES  TO OPEN  THE FILE. ÉF IT DOESN'T EXIST OR A DISK
ERROR OCCURS,  THEN NOTHING HAPPENS. ÌIFE GOES ON AS IF YOU HAD NEVER TRIED
TO ÅØÅÃ THE FILE.
 
  ÉF ALL  GOES WELL,  THEN FROM  THAT POINT  ON, EVERY  TIME  THE  COMPUTER
ATTEMPTS TO  FETCH A  CHARACTER FROM THE KEYBOARD (DEVICE NUMBER 0) IT WILL
FETCH ONE  FROM THE  ÅØÅÃ FILE INSTEAD. ÉT DOESN'T MATTER WHETHER YOU'RE IN
DIRECT OR  PROGRAM MODE  OR WHETHER  YOU USE  ÉÎÐÕÔ OR  ÇÅÔ, IF  THE ËÅÒÎÅÌ
THINKS IT'S DEALING WITH THE KEYBOARD, IT'S NOT, IT'S DEALING WITH THE ÅØÅÃ
FILE.
 
  ×HEN THE  END OF  THE ÅØÅÃ  FILE IS  REACHED, NORMAL  KEYBOARD  INPUT  IS
RESTORED.
 
  ÅØÅÃ  TRIES  TO  BE  AS  INCONSPICUOUS  AS  POSSIBLE.  ÔHERE  ARE  A  FEW
RESTRICTIONS. ÓINCE  ÅØÅÃ HAS  TO FETCH IT'S DATA FROM DISK (IT DOES SO ONE
SECTOR AT  A TIME)  IT MAY  NEED TO OPEN UP A DISK FILE WHILE AN ÅØÅÃ IS IN
PROGRESS. ÔHIS  ONLY APPLIES  IF THE ÅØÅÃ FILE IS MORE THAN ONE BLOCK LONG.
ÓINCE ÂÁÓÉÃ  ONLY ALLOWS  A MAXIMUM  OF TEN  FILES OPEN  AT ANY  ONE  TIME,
PROBLEMS WILL  ARISE IF  WHATEVER YOU'RE  ÅØÅÃING HAS TEN OPEN FILES. ÎOT A
VERY LIKELY  OCCURANCE. Á MORE LIKELY PROBLEM WOULD BE THE DISK DRIVE WHICH
ALLOWS FEWER OPEN FILES.
 
  ÔHERE ARE A COUPLE OF ÐÏËÅS THAT YOU MAY FIND USEFUL WHEN USING ÅØÅÃ.
 
  $1ÂÆÁ   - A ZERO HERE PAUSES ÅØÅÃ, 255 RESUMES ÅØÅÃ.
  $1ÂÅÂ   - NORMALLY ÅØÅÃ ECHOES EVERY CHARACTER IT
            FETCHES FROM THE ÅØÅÃ FILE TO THE SCREEN.
            Á ZERO HERE ENABLES ECHO, AND A 255 DISABLES
            ECHO.